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-rw-r--r--pkgs/applications/accessibility/contrast/default.nix2
-rw-r--r--pkgs/applications/audio/cadence/default.nix3
-rw-r--r--pkgs/applications/audio/clementine/default.nix2
-rw-r--r--pkgs/applications/audio/cozy-audiobooks/default.nix2
-rw-r--r--pkgs/applications/audio/curseradio/default.nix2
-rw-r--r--pkgs/applications/audio/dfasma/default.nix2
-rw-r--r--pkgs/applications/audio/dr14_tmeter/default.nix2
-rw-r--r--pkgs/applications/audio/faust/faust2jackrust.nix3
-rw-r--r--pkgs/applications/audio/fmit/default.nix2
-rw-r--r--pkgs/applications/audio/gnome-podcasts/default.nix2
-rw-r--r--pkgs/applications/audio/gpodder/default.nix2
-rw-r--r--pkgs/applications/audio/greg/default.nix2
-rw-r--r--pkgs/applications/audio/gtklick/default.nix2
-rw-r--r--pkgs/applications/audio/jamulus/default.nix2
-rw-r--r--pkgs/applications/audio/librespot/default.nix2
-rw-r--r--pkgs/applications/audio/lmms/default.nix2
-rw-r--r--pkgs/applications/audio/mimms/default.nix2
-rw-r--r--pkgs/applications/audio/mixxx/default.nix2
-rw-r--r--pkgs/applications/audio/mopidy/gmusic.nix2
-rw-r--r--pkgs/applications/audio/mopidy/iris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/moped.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mopify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpd.nix2
-rw-r--r--pkgs/applications/audio/mopidy/mpris.nix2
-rw-r--r--pkgs/applications/audio/mopidy/scrobbler.nix2
-rw-r--r--pkgs/applications/audio/mopidy/somafm.nix2
-rw-r--r--pkgs/applications/audio/mopidy/soundcloud.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify-tunigo.nix2
-rw-r--r--pkgs/applications/audio/mopidy/spotify.nix2
-rw-r--r--pkgs/applications/audio/mopidy/tunein.nix2
-rw-r--r--pkgs/applications/audio/mopidy/youtube.nix2
-rw-r--r--pkgs/applications/audio/munt/default.nix2
-rw-r--r--pkgs/applications/audio/musescore/default.nix2
-rw-r--r--pkgs/applications/audio/noisetorch/default.nix2
-rw-r--r--pkgs/applications/audio/padthv1/default.nix2
-rw-r--r--pkgs/applications/audio/picard/default.nix2
-rw-r--r--pkgs/applications/audio/pithos/default.nix2
-rw-r--r--pkgs/applications/audio/polyphone/default.nix2
-rw-r--r--pkgs/applications/audio/puddletag/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/default.nix2
-rw-r--r--pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix2
-rw-r--r--pkgs/applications/audio/qjackctl/default.nix2
-rw-r--r--pkgs/applications/audio/qmmp/default.nix2
-rw-r--r--pkgs/applications/audio/qsampler/default.nix2
-rw-r--r--pkgs/applications/audio/qsynth/default.nix2
-rw-r--r--pkgs/applications/audio/qtractor/default.nix2
-rw-r--r--pkgs/applications/audio/shortwave/default.nix2
-rw-r--r--pkgs/applications/audio/sonata/default.nix2
-rw-r--r--pkgs/applications/audio/spotify-cli-linux/default.nix2
-rw-r--r--pkgs/applications/audio/synthv1/default.nix2
-rw-r--r--pkgs/applications/audio/traverso/default.nix2
-rw-r--r--pkgs/applications/audio/whipper/default.nix2
-rw-r--r--pkgs/applications/blockchains/ethabi.nix2
-rw-r--r--pkgs/applications/blockchains/ledger-live-desktop/default.nix2
-rw-r--r--pkgs/applications/blockchains/quorum.nix2
-rw-r--r--pkgs/applications/blockchains/turbo-geth.nix2
-rw-r--r--pkgs/applications/editors/emacs-modes/sv-kalender/default.nix2
-rw-r--r--pkgs/applications/editors/featherpad/default.nix2
-rw-r--r--pkgs/applications/editors/focuswriter/default.nix2
-rw-r--r--pkgs/applications/editors/hecate/default.nix2
-rw-r--r--pkgs/applications/editors/hexdino/default.nix2
-rw-r--r--pkgs/applications/editors/kibi/default.nix2
-rw-r--r--pkgs/applications/editors/manuskript/default.nix2
-rw-r--r--pkgs/applications/editors/mindforger/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/gnvim/default.nix2
-rw-r--r--pkgs/applications/editors/neovim/neovim-remote.nix2
-rw-r--r--pkgs/applications/editors/okteta/default.nix2
-rw-r--r--pkgs/applications/editors/retext/default.nix2
-rw-r--r--pkgs/applications/editors/sigil/default.nix2
-rw-r--r--pkgs/applications/editors/texmacs/common.nix2
-rw-r--r--pkgs/applications/editors/thonny/default.nix2
-rw-r--r--pkgs/applications/editors/tiled/default.nix2
-rw-r--r--pkgs/applications/graphics/displaycal/default.nix2
-rw-r--r--pkgs/applications/graphics/dosage/default.nix2
-rw-r--r--pkgs/applications/graphics/freecad/default.nix2
-rw-r--r--pkgs/applications/graphics/gimp/wrapper.nix2
-rw-r--r--pkgs/applications/graphics/gscan2pdf/default.nix2
-rw-r--r--pkgs/applications/graphics/hydrus/default.nix2
-rw-r--r--pkgs/applications/graphics/ipe/default.nix2
-rw-r--r--pkgs/applications/graphics/kgraphviewer/default.nix2
-rw-r--r--pkgs/applications/graphics/krop/default.nix2
-rw-r--r--pkgs/applications/graphics/luminance-hdr/default.nix2
-rw-r--r--pkgs/applications/graphics/mcomix3/default.nix3
-rw-r--r--pkgs/applications/graphics/meme/default.nix2
-rw-r--r--pkgs/applications/graphics/mypaint/default.nix2
-rw-r--r--pkgs/applications/graphics/nomacs/default.nix2
-rw-r--r--pkgs/applications/graphics/paraview/default.nix2
-rw-r--r--pkgs/applications/graphics/pdfcpu/default.nix2
-rw-r--r--pkgs/applications/graphics/photoflare/default.nix2
-rw-r--r--pkgs/applications/graphics/photoqt/default.nix2
-rw-r--r--pkgs/applications/graphics/phototonic/default.nix2
-rw-r--r--pkgs/applications/graphics/pick-colour-picker/default.nix2
-rw-r--r--pkgs/applications/graphics/pinta/default.nix2
-rw-r--r--pkgs/applications/graphics/qcomicbook/default.nix2
-rw-r--r--pkgs/applications/graphics/rapid-photo-downloader/default.nix2
-rw-r--r--pkgs/applications/graphics/renderdoc/default.nix2
-rw-r--r--pkgs/applications/graphics/scantailor/advanced.nix2
-rw-r--r--pkgs/applications/graphics/tesseract/wrapper.nix2
-rw-r--r--pkgs/applications/logging/humioctl/default.nix2
-rw-r--r--pkgs/applications/misc/antfs-cli/default.nix2
-rw-r--r--pkgs/applications/misc/ape/apeclex.nix2
-rw-r--r--pkgs/applications/misc/archivy/default.nix2
-rw-r--r--pkgs/applications/misc/ausweisapp2/default.nix2
-rw-r--r--pkgs/applications/misc/autospotting/default.nix2
-rw-r--r--pkgs/applications/misc/barrier/default.nix2
-rw-r--r--pkgs/applications/misc/bibletime/default.nix2
-rw-r--r--pkgs/applications/misc/bleachbit/default.nix2
-rw-r--r--pkgs/applications/misc/break-time/default.nix2
-rw-r--r--pkgs/applications/misc/buku/default.nix2
-rw-r--r--pkgs/applications/misc/candle/default.nix2
-rw-r--r--pkgs/applications/misc/cheat/default.nix2
-rw-r--r--pkgs/applications/misc/chewing-editor/default.nix2
-rw-r--r--pkgs/applications/misc/coursera-dl/default.nix2
-rw-r--r--pkgs/applications/misc/crow-translate/default.nix2
-rw-r--r--pkgs/applications/misc/cum/default.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libarcus.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/libsavitar.nix2
-rw-r--r--pkgs/applications/misc/cura/lulzbot/uranium.nix2
-rw-r--r--pkgs/applications/misc/dasel/default.nix2
-rw-r--r--pkgs/applications/misc/devdocs-desktop/default.nix2
-rw-r--r--pkgs/applications/misc/dfilemanager/default.nix2
-rw-r--r--pkgs/applications/misc/diffpdf/default.nix2
-rw-r--r--pkgs/applications/misc/dmensamenu/default.nix2
-rw-r--r--pkgs/applications/misc/dockbarx/default.nix2
-rw-r--r--pkgs/applications/misc/dotfiles/default.nix2
-rw-r--r--pkgs/applications/misc/dstask/default.nix2
-rw-r--r--pkgs/applications/misc/dupeguru/default.nix2
-rw-r--r--pkgs/applications/misc/electrum/dash.nix2
-rw-r--r--pkgs/applications/misc/electrum/ltc.nix2
-rw-r--r--pkgs/applications/misc/elfx86exts/default.nix2
-rw-r--r--pkgs/applications/misc/exercism/default.nix2
-rw-r--r--pkgs/applications/misc/expenses/default.nix2
-rw-r--r--pkgs/applications/misc/fbmenugen/default.nix2
-rw-r--r--pkgs/applications/misc/geoipupdate/default.nix2
-rw-r--r--pkgs/applications/misc/get_iplayer/default.nix2
-rw-r--r--pkgs/applications/misc/go-jira/default.nix2
-rw-r--r--pkgs/applications/misc/golden-cheetah/default.nix2
-rw-r--r--pkgs/applications/misc/gpsbabel/gui.nix2
-rw-r--r--pkgs/applications/misc/gramps/default.nix2
-rw-r--r--pkgs/applications/misc/gsctl/default.nix2
-rw-r--r--pkgs/applications/misc/hamster/default.nix2
-rw-r--r--pkgs/applications/misc/haxor-news/default.nix2
-rw-r--r--pkgs/applications/misc/hivemind/default.nix2
-rw-r--r--pkgs/applications/misc/hugo/default.nix2
-rw-r--r--pkgs/applications/misc/jrnl/default.nix2
-rw-r--r--pkgs/applications/misc/k4dirstat/default.nix2
-rw-r--r--pkgs/applications/misc/keepass/default.nix2
-rw-r--r--pkgs/applications/misc/khard/default.nix2
-rw-r--r--pkgs/applications/misc/kondo/default.nix2
-rw-r--r--pkgs/applications/misc/kupfer/default.nix2
-rw-r--r--pkgs/applications/misc/loxodo/default.nix2
-rw-r--r--pkgs/applications/misc/madonctl/default.nix2
-rw-r--r--pkgs/applications/misc/mediaelch/default.nix2
-rw-r--r--pkgs/applications/misc/menumaker/default.nix2
-rw-r--r--pkgs/applications/misc/mop/default.nix2
-rw-r--r--pkgs/applications/misc/mqtt-bench/default.nix2
-rw-r--r--pkgs/applications/misc/multibootusb/default.nix2
-rw-r--r--pkgs/applications/misc/nixnote2/default.nix2
-rw-r--r--pkgs/applications/misc/ocropus/default.nix2
-rw-r--r--pkgs/applications/misc/onboard/default.nix2
-rw-r--r--pkgs/applications/misc/opentx/default.nix2
-rw-r--r--pkgs/applications/misc/orca/default.nix2
-rw-r--r--pkgs/applications/misc/pass-secret-service/default.nix2
-rw-r--r--pkgs/applications/misc/pdf-quench/default.nix2
-rw-r--r--pkgs/applications/misc/pdfarranger/default.nix2
-rw-r--r--pkgs/applications/misc/pdfdiff/default.nix2
-rw-r--r--pkgs/applications/misc/pgmodeler/default.nix3
-rw-r--r--pkgs/applications/misc/pipr/default.nix3
-rw-r--r--pkgs/applications/misc/plover/default.nix2
-rw-r--r--pkgs/applications/misc/prevo/default.nix2
-rw-r--r--pkgs/applications/misc/printrun/default.nix2
-rw-r--r--pkgs/applications/misc/pydf/default.nix2
-rw-r--r--pkgs/applications/misc/pyditz/cerberus.nix2
-rw-r--r--pkgs/applications/misc/pyditz/default.nix2
-rw-r--r--pkgs/applications/misc/pytrainer/default.nix2
-rw-r--r--pkgs/applications/misc/qdirstat/default.nix2
-rw-r--r--pkgs/applications/misc/qlcplus/default.nix2
-rw-r--r--pkgs/applications/misc/qpdfview/default.nix2
-rw-r--r--pkgs/applications/misc/qsudo/default.nix2
-rw-r--r--pkgs/applications/misc/qt-box-editor/default.nix2
-rw-r--r--pkgs/applications/misc/qtbitcointrader/default.nix2
-rw-r--r--pkgs/applications/misc/ranger/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/remarkable-mouse/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmapi/default.nix2
-rw-r--r--pkgs/applications/misc/remarkable/rmview/default.nix2
-rw-r--r--pkgs/applications/misc/rsclock/default.nix2
-rw-r--r--pkgs/applications/misc/rss-bridge-cli/default.nix2
-rw-r--r--pkgs/applications/misc/rtv/default.nix2
-rw-r--r--pkgs/applications/misc/snapper-gui/default.nix2
-rw-r--r--pkgs/applications/misc/syncthing-tray/default.nix2
-rw-r--r--pkgs/applications/misc/taskwarrior-tui/default.nix2
-rw-r--r--pkgs/applications/misc/termdown/default.nix2
-rw-r--r--pkgs/applications/misc/terminal-parrot/default.nix2
-rw-r--r--pkgs/applications/misc/termpdf.py/default.nix2
-rw-r--r--pkgs/applications/misc/tickrs/default.nix2
-rw-r--r--pkgs/applications/misc/tipp10/default.nix2
-rw-r--r--pkgs/applications/misc/todiff/default.nix2
-rw-r--r--pkgs/applications/misc/toot/default.nix2
-rw-r--r--pkgs/applications/misc/topydo/default.nix2
-rw-r--r--pkgs/applications/misc/tty-share/default.nix2
-rw-r--r--pkgs/applications/misc/tut/default.nix2
-rw-r--r--pkgs/applications/misc/tzupdate/default.nix2
-rw-r--r--pkgs/applications/misc/udiskie/default.nix2
-rw-r--r--pkgs/applications/misc/ulauncher/default.nix2
-rw-r--r--pkgs/applications/misc/urlscan/default.nix2
-rw-r--r--pkgs/applications/misc/valentina/default.nix2
-rw-r--r--pkgs/applications/misc/vym/default.nix2
-rw-r--r--pkgs/applications/misc/wego/default.nix2
-rw-r--r--pkgs/applications/misc/wikicurses/default.nix2
-rw-r--r--pkgs/applications/misc/xdgmenumaker/default.nix2
-rw-r--r--pkgs/applications/misc/yokadi/default.nix2
-rw-r--r--pkgs/applications/misc/zk-shell/default.nix2
-rw-r--r--pkgs/applications/misc/zscroll/default.nix2
-rw-r--r--pkgs/applications/networking/brig/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/browsh/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/castor/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/chromium/browser.nix2
-rw-r--r--pkgs/applications/networking/browsers/eolie/default.nix2
-rw-r--r--pkgs/applications/networking/browsers/qutebrowser/default.nix2
-rw-r--r--pkgs/applications/networking/c14/default.nix2
-rw-r--r--pkgs/applications/networking/cloudflared/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/atlantis/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/docker-machine/kvm.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxcd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/fluxctl/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/habitat/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/helm/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/k9s/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kops/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeless/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubelogin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubernix/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/kubeval/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/linkerd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/openshift/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/popeye/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/ssm-agent/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-inventory/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/shell/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/tilt/default.nix2
-rw-r--r--pkgs/applications/networking/cluster/velero/default.nix2
-rw-r--r--pkgs/applications/networking/datovka/default.nix2
-rw-r--r--pkgs/applications/networking/dyndns/cfdyndns/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-curses/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/canto-daemon/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/feeds/default.nix2
-rw-r--r--pkgs/applications/networking/feedreaders/rawdog/default.nix2
-rw-r--r--pkgs/applications/networking/flent/default.nix2
-rw-r--r--pkgs/applications/networking/gdrive/default.nix2
-rw-r--r--pkgs/applications/networking/gns3/server.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/blink/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/cordless/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/coyim/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/element/element-desktop.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ferdi/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/franz/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/linphone/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/matrixcli/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/mm/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/neochat/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/pybitmessage/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/rambox/rambox.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/ricochet/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/scudcloud/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/slack-term/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/swift-im/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/tensor/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/turses/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/twinkle/default.nix2
-rw-r--r--pkgs/applications/networking/instant-messengers/xmpp-client/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs-cluster/default.nix2
-rw-r--r--pkgs/applications/networking/ipfs/default.nix2
-rw-r--r--pkgs/applications/networking/ipget/default.nix2
-rw-r--r--pkgs/applications/networking/irc/qweechat/default.nix2
-rw-r--r--pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix2
-rw-r--r--pkgs/applications/networking/lieer/default.nix2
-rw-r--r--pkgs/applications/networking/maestral-qt/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/aerc/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/afew/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/mailpile/default.nix2
-rw-r--r--pkgs/applications/networking/mailreaders/meli/default.nix3
-rw-r--r--pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix2
-rw-r--r--pkgs/applications/networking/owncloud-client/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/deluge/default.nix2
-rw-r--r--pkgs/applications/networking/p2p/zeronet/default.nix2
-rw-r--r--pkgs/applications/networking/protocol/default.nix2
-rw-r--r--pkgs/applications/networking/pyload/default.nix2
-rw-r--r--pkgs/applications/networking/qv2ray/default.nix2
-rw-r--r--pkgs/applications/networking/remote/x2goclient/default.nix2
-rw-r--r--pkgs/applications/networking/shellhub-agent/default.nix2
-rw-r--r--pkgs/applications/networking/soulseek/nicotine-plus/default.nix2
-rw-r--r--pkgs/applications/networking/sync/acd_cli/default.nix2
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2779 files changed, 2844 insertions, 2834 deletions
diff --git a/pkgs/applications/accessibility/contrast/default.nix b/pkgs/applications/accessibility/contrast/default.nix
index 2899d4ea6efaa..689ad27357524 100644
--- a/pkgs/applications/accessibility/contrast/default.nix
+++ b/pkgs/applications/accessibility/contrast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cairo
 , dbus
diff --git a/pkgs/applications/audio/cadence/default.nix b/pkgs/applications/audio/cadence/default.nix
index d71420d072276..2d3ac0c314ea9 100644
--- a/pkgs/applications/audio/cadence/default.nix
+++ b/pkgs/applications/audio/cadence/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , a2jmidid
 , coreutils
-, lib
 , libjack2
 , fetchpatch
 , fetchzip
diff --git a/pkgs/applications/audio/clementine/default.nix b/pkgs/applications/audio/clementine/default.nix
index 12aec0d4cbbca..be0f2f72529c5 100644
--- a/pkgs/applications/audio/clementine/default.nix
+++ b/pkgs/applications/audio/clementine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, boost, cmake, chromaprint, gettext, gst_all_1, liblastfm
 , qtbase, qtx11extras
 , taglib, fftw, glew, qjson, sqlite, libgpod, libplist, usbmuxd, libmtp
 , libpulseaudio, gvfs, libcdio, libechonest, libspotify, pcre, projectm, protobuf
diff --git a/pkgs/applications/audio/cozy-audiobooks/default.nix b/pkgs/applications/audio/cozy-audiobooks/default.nix
index e78e50877d379..bcad36e2da98b 100644
--- a/pkgs/applications/audio/cozy-audiobooks/default.nix
+++ b/pkgs/applications/audio/cozy-audiobooks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , ninja
 , meson
 , pkg-config
diff --git a/pkgs/applications/audio/curseradio/default.nix b/pkgs/applications/audio/curseradio/default.nix
index 82f3b130e6ea4..94059e06e5462 100644
--- a/pkgs/applications/audio/curseradio/default.nix
+++ b/pkgs/applications/audio/curseradio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, substituteAll, python3Packages, mpv }:
+{ lib, fetchFromGitHub, substituteAll, python3Packages, mpv }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.2";
diff --git a/pkgs/applications/audio/dfasma/default.nix b/pkgs/applications/audio/dfasma/default.nix
index 20a1044fe24d1..3d4e5e5e5b9af 100644
--- a/pkgs/applications/audio/dfasma/default.nix
+++ b/pkgs/applications/audio/dfasma/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, fftw, libsndfile, qtbase, qtmultimedia, qmake }:
 
 let
 
diff --git a/pkgs/applications/audio/dr14_tmeter/default.nix b/pkgs/applications/audio/dr14_tmeter/default.nix
index 92e6eb2b3236b..80b2cff3ce035 100644
--- a/pkgs/applications/audio/dr14_tmeter/default.nix
+++ b/pkgs/applications/audio/dr14_tmeter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, pkgs }:
+{ lib, fetchFromGitHub, python3Packages, pkgs }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dr14_tmeter";
diff --git a/pkgs/applications/audio/faust/faust2jackrust.nix b/pkgs/applications/audio/faust/faust2jackrust.nix
index 77335da2ce792..a93251c8d2d26 100644
--- a/pkgs/applications/audio/faust/faust2jackrust.nix
+++ b/pkgs/applications/audio/faust/faust2jackrust.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, faust
+{ faust
 , libjack2
 , cargo
 , binutils
diff --git a/pkgs/applications/audio/fmit/default.nix b/pkgs/applications/audio/fmit/default.nix
index e22067c38fc78..b91c72a5c754c 100644
--- a/pkgs/applications/audio/fmit/default.nix
+++ b/pkgs/applications/audio/fmit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
+{ lib, mkDerivation, fetchFromGitHub, fftw, qtbase, qtmultimedia, qmake, itstool, wrapQtAppsHook
 , alsaSupport ? true, alsaLib ? null
 , jackSupport ? false, libjack2 ? null
 , portaudioSupport ? false, portaudio ? null }:
diff --git a/pkgs/applications/audio/gnome-podcasts/default.nix b/pkgs/applications/audio/gnome-podcasts/default.nix
index ed51304b22566..1733aef41775a 100644
--- a/pkgs/applications/audio/gnome-podcasts/default.nix
+++ b/pkgs/applications/audio/gnome-podcasts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitLab
 , fetchpatch
diff --git a/pkgs/applications/audio/gpodder/default.nix b/pkgs/applications/audio/gpodder/default.nix
index dea1f5fe7bcf0..229050654cd54 100644
--- a/pkgs/applications/audio/gpodder/default.nix
+++ b/pkgs/applications/audio/gpodder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages, intltool
+{ lib, fetchFromGitHub, python3, python3Packages, intltool
 , glibcLocales, gnome3, gtk3, wrapGAppsHook
 , gobject-introspection
 }:
diff --git a/pkgs/applications/audio/greg/default.nix b/pkgs/applications/audio/greg/default.nix
index 46e1baed07d33..95f3bf9988cdc 100644
--- a/pkgs/applications/audio/greg/default.nix
+++ b/pkgs/applications/audio/greg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with pythonPackages; buildPythonApplication rec {
   pname = "greg";
diff --git a/pkgs/applications/audio/gtklick/default.nix b/pkgs/applications/audio/gtklick/default.nix
index ddd09ce44522c..b3b95ca057e5f 100644
--- a/pkgs/applications/audio/gtklick/default.nix
+++ b/pkgs/applications/audio/gtklick/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, gettext, klick}:
+{ lib, fetchurl, pythonPackages, gettext, klick}:
 
 pythonPackages.buildPythonApplication rec {
   pname = "gtklick";
diff --git a/pkgs/applications/audio/jamulus/default.nix b/pkgs/applications/audio/jamulus/default.nix
index c6510f5469c0d..13b488ce7d783 100644
--- a/pkgs/applications/audio/jamulus/default.nix
+++ b/pkgs/applications/audio/jamulus/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
+{ mkDerivation, lib, fetchFromGitHub, fetchpatch, pkg-config, qtscript, qmake, libjack2
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/librespot/default.nix b/pkgs/applications/audio/librespot/default.nix
index 7ba47be686ee6..13aa4fe5bc27b 100644
--- a/pkgs/applications/audio/librespot/default.nix
+++ b/pkgs/applications/audio/librespot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl, withRodio ? true
 , withALSA ? true, alsaLib ? null, withPulseAudio ? false, libpulseaudio ? null
 , withPortAudio ? false, portaudio ? null }:
 
diff --git a/pkgs/applications/audio/lmms/default.nix b/pkgs/applications/audio/lmms/default.nix
index 4d52a286aba92..11a7d0cf3c6f7 100644
--- a/pkgs/applications/audio/lmms/default.nix
+++ b/pkgs/applications/audio/lmms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
+{ lib, fetchFromGitHub, cmake, pkg-config, alsaLib ? null, fftwFloat, fltk13
 , fluidsynth_1 ? null, lame ? null, libgig ? null, libjack2 ? null, libpulseaudio ? null
 , libsamplerate, libsoundio ? null, libsndfile, libvorbis ? null, portaudio ? null
 , qtbase, qtx11extras, qttools, SDL ? null, mkDerivation }:
diff --git a/pkgs/applications/audio/mimms/default.nix b/pkgs/applications/audio/mimms/default.nix
index 793ee3d263ab4..9811998c36856 100644
--- a/pkgs/applications/audio/mimms/default.nix
+++ b/pkgs/applications/audio/mimms/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, pythonPackages, libmms }:
+{ fetchurl, lib, pythonPackages, libmms }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mimms";
diff --git a/pkgs/applications/audio/mixxx/default.nix b/pkgs/applications/audio/mixxx/default.nix
index 70e6616482f93..7af4b585adfad 100644
--- a/pkgs/applications/audio/mixxx/default.nix
+++ b/pkgs/applications/audio/mixxx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
+{ lib, mkDerivation, fetchurl, fetchFromGitHub, chromaprint
 , fftw, flac, faad2, glibcLocales, mp4v2
 , libid3tag, libmad, libopus, libshout, libsndfile, libusb1, libvorbis
 , libGLU, libxcb, lilv, lv2, opusfile
diff --git a/pkgs/applications/audio/mopidy/gmusic.nix b/pkgs/applications/audio/mopidy/gmusic.nix
index 54af3bc68f1e5..6e76d6af87d34 100644
--- a/pkgs/applications/audio/mopidy/gmusic.nix
+++ b/pkgs/applications/audio/mopidy/gmusic.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-gmusic";
diff --git a/pkgs/applications/audio/mopidy/iris.nix b/pkgs/applications/audio/mopidy/iris.nix
index 05827b0bb565a..c2171d4cecc42 100644
--- a/pkgs/applications/audio/mopidy/iris.nix
+++ b/pkgs/applications/audio/mopidy/iris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Iris";
diff --git a/pkgs/applications/audio/mopidy/moped.nix b/pkgs/applications/audio/mopidy/moped.nix
index 8daaef7d45d9f..c191eba4c4d97 100644
--- a/pkgs/applications/audio/mopidy/moped.nix
+++ b/pkgs/applications/audio/mopidy/moped.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy, glibcLocales }:
+{ lib, pythonPackages, mopidy, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Moped";
diff --git a/pkgs/applications/audio/mopidy/mopify.nix b/pkgs/applications/audio/mopidy/mopify.nix
index 17e68c165394c..670b1a9c50912 100644
--- a/pkgs/applications/audio/mopidy/mopify.nix
+++ b/pkgs/applications/audio/mopidy/mopify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, mopidy }:
+{ lib, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "Mopidy-Mopify";
diff --git a/pkgs/applications/audio/mopidy/mpd.nix b/pkgs/applications/audio/mopidy/mpd.nix
index 8d6d7a1528b91..d686d49289890 100644
--- a/pkgs/applications/audio/mopidy/mpd.nix
+++ b/pkgs/applications/audio/mopidy/mpd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-MPD";
diff --git a/pkgs/applications/audio/mopidy/mpris.nix b/pkgs/applications/audio/mopidy/mpris.nix
index 868dbaf303587..6327ba020bf98 100644
--- a/pkgs/applications/audio/mopidy/mpris.nix
+++ b/pkgs/applications/audio/mopidy/mpris.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-mpris";
diff --git a/pkgs/applications/audio/mopidy/scrobbler.nix b/pkgs/applications/audio/mopidy/scrobbler.nix
index be38c6a7040d5..621ced53646ab 100644
--- a/pkgs/applications/audio/mopidy/scrobbler.nix
+++ b/pkgs/applications/audio/mopidy/scrobbler.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Mopidy-Scrobbler";
diff --git a/pkgs/applications/audio/mopidy/somafm.nix b/pkgs/applications/audio/mopidy/somafm.nix
index afa46726db7eb..0637731dcb576 100644
--- a/pkgs/applications/audio/mopidy/somafm.nix
+++ b/pkgs/applications/audio/mopidy/somafm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-somafm";
diff --git a/pkgs/applications/audio/mopidy/soundcloud.nix b/pkgs/applications/audio/mopidy/soundcloud.nix
index bdc3523652c04..d8a244b514670 100644
--- a/pkgs/applications/audio/mopidy/soundcloud.nix
+++ b/pkgs/applications/audio/mopidy/soundcloud.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-soundcloud";
diff --git a/pkgs/applications/audio/mopidy/spotify-tunigo.nix b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
index 8fafab0970f8f..70d076190cda2 100644
--- a/pkgs/applications/audio/mopidy/spotify-tunigo.nix
+++ b/pkgs/applications/audio/mopidy/spotify-tunigo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
+{ lib, fetchFromGitHub, pythonPackages, mopidy, mopidy-spotify }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify-tunigo";
diff --git a/pkgs/applications/audio/mopidy/spotify.nix b/pkgs/applications/audio/mopidy/spotify.nix
index 57ba6ea1f615a..e44b9f35daaf8 100644
--- a/pkgs/applications/audio/mopidy/spotify.nix
+++ b/pkgs/applications/audio/mopidy/spotify.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, mopidy }:
+{ lib, fetchurl, pythonPackages, mopidy }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "mopidy-spotify";
diff --git a/pkgs/applications/audio/mopidy/tunein.nix b/pkgs/applications/audio/mopidy/tunein.nix
index d8a6d6eacca64..4a3edd2a4344d 100644
--- a/pkgs/applications/audio/mopidy/tunein.nix
+++ b/pkgs/applications/audio/mopidy/tunein.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-tunein";
diff --git a/pkgs/applications/audio/mopidy/youtube.nix b/pkgs/applications/audio/mopidy/youtube.nix
index 35a85b958018d..b84a756c2ce17 100644
--- a/pkgs/applications/audio/mopidy/youtube.nix
+++ b/pkgs/applications/audio/mopidy/youtube.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, mopidy }:
+{ lib, python3Packages, mopidy }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mopidy-youtube";
diff --git a/pkgs/applications/audio/munt/default.nix b/pkgs/applications/audio/munt/default.nix
index 6d010c6cd9564..0efe034034ac7 100644
--- a/pkgs/applications/audio/munt/default.nix
+++ b/pkgs/applications/audio/munt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qtbase, alsaLib, makeDesktopItem, libjack2 }:
 
 let
   desktopItem = makeDesktopItem rec {
diff --git a/pkgs/applications/audio/musescore/default.nix b/pkgs/applications/audio/musescore/default.nix
index ff39e62e7290e..47f8e5a22e62d 100644
--- a/pkgs/applications/audio/musescore/default.nix
+++ b/pkgs/applications/audio/musescore/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
+{ mkDerivation, lib, fetchFromGitHub, cmake, pkg-config
 , alsaLib, freetype, libjack2, lame, libogg, libpulseaudio, libsndfile, libvorbis
 , portaudio, portmidi, qtbase, qtdeclarative, qtgraphicaleffects
 , qtquickcontrols2, qtscript, qtsvg, qttools
diff --git a/pkgs/applications/audio/noisetorch/default.nix b/pkgs/applications/audio/noisetorch/default.nix
index bb22b3cec221b..fea6e097de7a7 100644
--- a/pkgs/applications/audio/noisetorch/default.nix
+++ b/pkgs/applications/audio/noisetorch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
+{ lib, buildGoModule, fetchFromGitHub, rnnoise-plugin }:
 
 buildGoModule rec {
   pname = "NoiseTorch";
diff --git a/pkgs/applications/audio/padthv1/default.nix b/pkgs/applications/audio/padthv1/default.nix
index 1d84aed8b2e76..f238a68760995 100644
--- a/pkgs/applications/audio/padthv1/default.nix
+++ b/pkgs/applications/audio/padthv1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
+{ lib, fetchurl, pkg-config, libjack2, alsaLib, libsndfile, liblo, lv2, qt5, fftwFloat, mkDerivation }:
 
 mkDerivation rec {
   pname = "padthv1";
diff --git a/pkgs/applications/audio/picard/default.nix b/pkgs/applications/audio/picard/default.nix
index 733cb702c7e5a..200e457c5685c 100644
--- a/pkgs/applications/audio/picard/default.nix
+++ b/pkgs/applications/audio/picard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
+{ lib, python3Packages, fetchFromGitHub, gettext, chromaprint, qt5
 , enablePlayback ? true
 , gst_all_1
 }:
diff --git a/pkgs/applications/audio/pithos/default.nix b/pkgs/applications/audio/pithos/default.nix
index c64371f091c2e..939b53c44fb18 100644
--- a/pkgs/applications/audio/pithos/default.nix
+++ b/pkgs/applications/audio/pithos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
+{ lib, fetchFromGitHub, meson, ninja, pkg-config, appstream-glib
 , wrapGAppsHook, pythonPackages, gtk3, gnome3, gobject-introspection
 , libnotify, libsecret, gst_all_1 }:
 
diff --git a/pkgs/applications/audio/polyphone/default.nix b/pkgs/applications/audio/polyphone/default.nix
index 05800c360fae0..a331952aa81d3 100644
--- a/pkgs/applications/audio/polyphone/default.nix
+++ b/pkgs/applications/audio/polyphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, alsaLib, libjack2, portaudio, libogg, flac, libvorbis, rtmidi, qtsvg }:
 
 mkDerivation rec {
   version = "2.2.0";
diff --git a/pkgs/applications/audio/puddletag/default.nix b/pkgs/applications/audio/puddletag/default.nix
index 94a571df2944c..efa1d94361007 100644
--- a/pkgs/applications/audio/puddletag/default.nix
+++ b/pkgs/applications/audio/puddletag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook, chromaprint }:
 
 python3Packages.buildPythonApplication rec {
   pname = "puddletag";
diff --git a/pkgs/applications/audio/pulseaudio-dlna/default.nix b/pkgs/applications/audio/pulseaudio-dlna/default.nix
index a19a03d4bd2aa..83de192c6b316 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/default.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, pythonPackages
+{ fetchFromGitHub, lib, pythonPackages
 , mp3Support ? true, lame ? null
 , opusSupport ? true, opusTools ? null
 , faacSupport ? false, faac ? null
diff --git a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
index 0e3eeac984a22..d4f3306697d7c 100644
--- a/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
+++ b/pkgs/applications/audio/pulseaudio-dlna/zeroconf.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ifaddr
diff --git a/pkgs/applications/audio/qjackctl/default.nix b/pkgs/applications/audio/qjackctl/default.nix
index 719ddd28e2ad2..586dfeae73319 100644
--- a/pkgs/applications/audio/qjackctl/default.nix
+++ b/pkgs/applications/audio/qjackctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , pkg-config, cmake, alsaLib, libjack2, dbus, qtbase, qttools, qtx11extras
 # Enable jack session support
 , jackSession ? false
diff --git a/pkgs/applications/audio/qmmp/default.nix b/pkgs/applications/audio/qmmp/default.nix
index 950e16cedc8b9..f079b99af7716 100644
--- a/pkgs/applications/audio/qmmp/default.nix
+++ b/pkgs/applications/audio/qmmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, xlibsWrapper
 , qtbase, qttools, qtmultimedia, qtx11extras
 # transports
 , curl, libmms
diff --git a/pkgs/applications/audio/qsampler/default.nix b/pkgs/applications/audio/qsampler/default.nix
index 03f519d3816e9..bb40e0b3eebcd 100644
--- a/pkgs/applications/audio/qsampler/default.nix
+++ b/pkgs/applications/audio/qsampler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, autoconf, automake, libtool, pkg-config, qttools
+{ lib, fetchurl, autoconf, automake, libtool, pkg-config, qttools
 , liblscp, libgig, qtbase, mkDerivation }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/audio/qsynth/default.nix b/pkgs/applications/audio/qsynth/default.nix
index 4b712bf1d2542..f708207cce916 100644
--- a/pkgs/applications/audio/qsynth/default.nix
+++ b/pkgs/applications/audio/qsynth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
+{ lib, fetchurl, alsaLib, fluidsynth, libjack2, autoconf, pkg-config
 , mkDerivation, qtbase, qttools, qtx11extras
 }:
 
diff --git a/pkgs/applications/audio/qtractor/default.nix b/pkgs/applications/audio/qtractor/default.nix
index 493a99f6b71ba..f19d0f70fdf4e 100644
--- a/pkgs/applications/audio/qtractor/default.nix
+++ b/pkgs/applications/audio/qtractor/default.nix
@@ -24,7 +24,7 @@
 , serd
 , sord
 , sratom
-, lib, stdenv
+, lib
 , suil
 }:
 
diff --git a/pkgs/applications/audio/shortwave/default.nix b/pkgs/applications/audio/shortwave/default.nix
index 2cc8c53f6072a..a503d3b344cb2 100644
--- a/pkgs/applications/audio/shortwave/default.nix
+++ b/pkgs/applications/audio/shortwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , cargo
 , dbus
diff --git a/pkgs/applications/audio/sonata/default.nix b/pkgs/applications/audio/sonata/default.nix
index bc098cedaf405..83af7985dbe2d 100644
--- a/pkgs/applications/audio/sonata/default.nix
+++ b/pkgs/applications/audio/sonata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, wrapGAppsHook, gettext
+{ lib, fetchFromGitHub, wrapGAppsHook, gettext
 , python3Packages, gnome3, gtk3, glib, gdk-pixbuf, gsettings-desktop-schemas, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/audio/spotify-cli-linux/default.nix b/pkgs/applications/audio/spotify-cli-linux/default.nix
index 593ad9468ebae..e473d97ce56ce 100644
--- a/pkgs/applications/audio/spotify-cli-linux/default.nix
+++ b/pkgs/applications/audio/spotify-cli-linux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, dbus }:
+{ lib, python3Packages, dbus }:
 python3Packages.buildPythonApplication rec {
   pname = "spotify-cli-linux";
   version = "1.6.0";
diff --git a/pkgs/applications/audio/synthv1/default.nix b/pkgs/applications/audio/synthv1/default.nix
index 8097ee9093059..50e16c355e2bc 100644
--- a/pkgs/applications/audio/synthv1/default.nix
+++ b/pkgs/applications/audio/synthv1/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
+{ mkDerivation, lib, fetchurl, pkg-config, qtbase, qttools, libjack2, alsaLib, liblo, lv2 }:
 
 mkDerivation rec {
   pname = "synthv1";
diff --git a/pkgs/applications/audio/traverso/default.nix b/pkgs/applications/audio/traverso/default.nix
index 1cb9795005c10..71a91dc3105ed 100644
--- a/pkgs/applications/audio/traverso/default.nix
+++ b/pkgs/applications/audio/traverso/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config
+{ mkDerivation, lib, fetchurl, cmake, pkg-config
 , alsaLib, fftw, flac, lame, libjack2, libmad, libpulseaudio
 , libsamplerate, libsndfile, libvorbis, portaudio, qtbase, wavpack
 }:
diff --git a/pkgs/applications/audio/whipper/default.nix b/pkgs/applications/audio/whipper/default.nix
index 8a46a06efceef..97d42eb9c69fc 100644
--- a/pkgs/applications/audio/whipper/default.nix
+++ b/pkgs/applications/audio/whipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
+{ lib, fetchFromGitHub, python3, cdparanoia, cdrdao, flac
 , sox, accuraterip-checksum, libsndfile, util-linux, substituteAll }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/applications/blockchains/ethabi.nix b/pkgs/applications/blockchains/ethabi.nix
index ec142cc723ef1..8cf3295ccab30 100644
--- a/pkgs/applications/blockchains/ethabi.nix
+++ b/pkgs/applications/blockchains/ethabi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "ethabi";
diff --git a/pkgs/applications/blockchains/ledger-live-desktop/default.nix b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
index 54805f2512fec..21e5a124f7daf 100644
--- a/pkgs/applications/blockchains/ledger-live-desktop/default.nix
+++ b/pkgs/applications/blockchains/ledger-live-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
+{ lib, fetchurl, makeDesktopItem, appimageTools, imagemagick }:
 
 let
   pname = "ledger-live-desktop";
diff --git a/pkgs/applications/blockchains/quorum.nix b/pkgs/applications/blockchains/quorum.nix
index 499e2a77c6f68..1424ddc9516f8 100644
--- a/pkgs/applications/blockchains/quorum.nix
+++ b/pkgs/applications/blockchains/quorum.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
+{ lib, fetchFromGitHub, buildGoPackage, git, which, removeReferencesTo, go }:
 
 buildGoPackage rec {
   pname = "quorum";
diff --git a/pkgs/applications/blockchains/turbo-geth.nix b/pkgs/applications/blockchains/turbo-geth.nix
index 79a1eda3495ad..dcfba4171494a 100644
--- a/pkgs/applications/blockchains/turbo-geth.nix
+++ b/pkgs/applications/blockchains/turbo-geth.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "turbo-geth";
diff --git a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
index dd553fc199804..ea871ccf414f9 100644
--- a/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
+++ b/pkgs/applications/editors/emacs-modes/sv-kalender/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, trivialBuild }:
+{ fetchurl, lib, trivialBuild }:
 
 trivialBuild {
   pname = "sv-kalender";
diff --git a/pkgs/applications/editors/featherpad/default.nix b/pkgs/applications/editors/featherpad/default.nix
index 059d49151d868..c73238ce36613 100644
--- a/pkgs/applications/editors/featherpad/default.nix
+++ b/pkgs/applications/editors/featherpad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
+{ lib, mkDerivation, pkg-config, qmake, qttools, qtbase, qtsvg, qtx11extras, fetchFromGitHub }:
 mkDerivation rec {
   pname = "featherpad";
   version = "0.10.0";
diff --git a/pkgs/applications/editors/focuswriter/default.nix b/pkgs/applications/editors/focuswriter/default.nix
index 31a7026106eba..d47c315f613a2 100644
--- a/pkgs/applications/editors/focuswriter/default.nix
+++ b/pkgs/applications/editors/focuswriter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
+{ lib, fetchurl, pkg-config, qmake, qttools, hunspell, qtbase, qtmultimedia, mkDerivation }:
 
 mkDerivation rec {
   pname = "focuswriter";
diff --git a/pkgs/applications/editors/hecate/default.nix b/pkgs/applications/editors/hecate/default.nix
index a0fdcfbb3f66d..5429497d209e8 100644
--- a/pkgs/applications/editors/hecate/default.nix
+++ b/pkgs/applications/editors/hecate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "0.0.1";
diff --git a/pkgs/applications/editors/hexdino/default.nix b/pkgs/applications/editors/hexdino/default.nix
index 5d782aa1abcbb..f92a4557ac7a7 100644
--- a/pkgs/applications/editors/hexdino/default.nix
+++ b/pkgs/applications/editors/hexdino/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, ncurses }:
 
 rustPlatform.buildRustPackage {
   pname = "hexdino";
diff --git a/pkgs/applications/editors/kibi/default.nix b/pkgs/applications/editors/kibi/default.nix
index 07454d331c6f7..71833be330026 100644
--- a/pkgs/applications/editors/kibi/default.nix
+++ b/pkgs/applications/editors/kibi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/applications/editors/manuskript/default.nix b/pkgs/applications/editors/manuskript/default.nix
index cc39da90c2373..49dafe8fc1a3d 100644
--- a/pkgs/applications/editors/manuskript/default.nix
+++ b/pkgs/applications/editors/manuskript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, zlib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "manuskript";
diff --git a/pkgs/applications/editors/mindforger/default.nix b/pkgs/applications/editors/mindforger/default.nix
index a8e60cddfbb84..512e0f1244117 100644
--- a/pkgs/applications/editors/mindforger/default.nix
+++ b/pkgs/applications/editors/mindforger/default.nix
@@ -4,7 +4,7 @@
 , qmake
 , qtbase
 , qtwebkit
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/editors/neovim/gnvim/default.nix b/pkgs/applications/editors/neovim/gnvim/default.nix
index f1d56584e4995..208339c2e38dc 100644
--- a/pkgs/applications/editors/neovim/gnvim/default.nix
+++ b/pkgs/applications/editors/neovim/gnvim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
+{ lib, rustPlatform, fetchFromGitHub, gtk, webkitgtk }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gnvim-unwrapped";
diff --git a/pkgs/applications/editors/neovim/neovim-remote.nix b/pkgs/applications/editors/neovim/neovim-remote.nix
index 1d82e70f5c4da..867e227512844 100644
--- a/pkgs/applications/editors/neovim/neovim-remote.nix
+++ b/pkgs/applications/editors/neovim/neovim-remote.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 with lib;
 
diff --git a/pkgs/applications/editors/okteta/default.nix b/pkgs/applications/editors/okteta/default.nix
index d51f46b9e0a40..b2011c5d8e655 100644
--- a/pkgs/applications/editors/okteta/default.nix
+++ b/pkgs/applications/editors/okteta/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
+{ mkDerivation, lib, fetchurl, extra-cmake-modules, kdoctools, qtscript, kconfig
 , kinit, karchive, kcrash, kcmutils, kconfigwidgets, knewstuff, kparts
 , qca-qt5, shared-mime-info }:
 
diff --git a/pkgs/applications/editors/retext/default.nix b/pkgs/applications/editors/retext/default.nix
index 99f7340f7536f..6bf0f191ece2f 100644
--- a/pkgs/applications/editors/retext/default.nix
+++ b/pkgs/applications/editors/retext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
+{ lib, python3, fetchFromGitHub, wrapQtAppsHook, buildEnv, aspellDicts
 # Use `lib.collect lib.isDerivation aspellDicts;` to make all dictionaries
 # available.
 , enchantAspellDicts ? with aspellDicts; [ en en-computers en-science ]
diff --git a/pkgs/applications/editors/sigil/default.nix b/pkgs/applications/editors/sigil/default.nix
index 1094c3c755356..b34441d100c33 100644
--- a/pkgs/applications/editors/sigil/default.nix
+++ b/pkgs/applications/editors/sigil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, makeWrapper
 , boost, xercesc, hunspell, zlib, pcre16
 , qtbase, qttools, qtwebengine, qtxmlpatterns
 , python3Packages
diff --git a/pkgs/applications/editors/texmacs/common.nix b/pkgs/applications/editors/texmacs/common.nix
index 3ffcc8ecf45ca..e52d95f837df4 100644
--- a/pkgs/applications/editors/texmacs/common.nix
+++ b/pkgs/applications/editors/texmacs/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
+{ lib, fetchurl, tex, extraFonts, chineseFonts, japaneseFonts, koreanFonts }:
 rec {
   extraFontsSrc = fetchurl {
     url = "ftp://ftp.texmacs.org/pub/TeXmacs/fonts/TeXmacs-extra-fonts-1.0-noarch.tar.gz";
diff --git a/pkgs/applications/editors/thonny/default.nix b/pkgs/applications/editors/thonny/default.nix
index e98d57420e813..39aefe3fa163a 100644
--- a/pkgs/applications/editors/thonny/default.nix
+++ b/pkgs/applications/editors/thonny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/applications/editors/tiled/default.nix b/pkgs/applications/editors/tiled/default.nix
index f5306e75a56cc..b6222c8a6d2ce 100644
--- a/pkgs/applications/editors/tiled/default.nix
+++ b/pkgs/applications/editors/tiled/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, pkg-config, qmake
+{ lib, mkDerivation, fetchFromGitHub, pkg-config, qmake
 , python, qtbase, qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/displaycal/default.nix b/pkgs/applications/graphics/displaycal/default.nix
index d1cee064aee69..3b6bb01bb1507 100644
--- a/pkgs/applications/graphics/displaycal/default.nix
+++ b/pkgs/applications/graphics/displaycal/default.nix
@@ -1,5 +1,5 @@
 { python2
-, lib, stdenv
+, lib
 , fetchurl
 , pkg-config
 , libXext
diff --git a/pkgs/applications/graphics/dosage/default.nix b/pkgs/applications/graphics/dosage/default.nix
index b2997c2c474a0..db0012a184bef 100644
--- a/pkgs/applications/graphics/dosage/default.nix
+++ b/pkgs/applications/graphics/dosage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "dosage";
diff --git a/pkgs/applications/graphics/freecad/default.nix b/pkgs/applications/graphics/freecad/default.nix
index 3563220f2b873..1c4f05b42dac9 100644
--- a/pkgs/applications/graphics/freecad/default.nix
+++ b/pkgs/applications/graphics/freecad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
+{ lib, mkDerivation, fetchFromGitHub, fetchpatch, cmake, ninja, coin3d,
 xercesc, ode, eigen, qtbase, qttools, qtwebengine, qtxmlpatterns, wrapQtAppsHook,
 opencascade-occt, gts, hdf5, vtk, medfile, zlib, python3Packages, swig,
 gfortran, libXmu, soqt, libf2c, libGLU, makeWrapper, pkg-config, mpi ? null }:
diff --git a/pkgs/applications/graphics/gimp/wrapper.nix b/pkgs/applications/graphics/gimp/wrapper.nix
index 094dcf0703e43..8fde04d0d1df6 100644
--- a/pkgs/applications/graphics/gimp/wrapper.nix
+++ b/pkgs/applications/graphics/gimp/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
+{ lib, symlinkJoin, gimp, makeWrapper, gimpPlugins, gnome3, plugins ? null}:
 
 let
 allPlugins = lib.filter (pkg: lib.isDerivation pkg && !pkg.meta.broken or false) (lib.attrValues gimpPlugins);
diff --git a/pkgs/applications/graphics/gscan2pdf/default.nix b/pkgs/applications/graphics/gscan2pdf/default.nix
index 30c211498279a..0e65d3199ab5f 100644
--- a/pkgs/applications/graphics/gscan2pdf/default.nix
+++ b/pkgs/applications/graphics/gscan2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, wrapGAppsHook,
+{ lib, fetchurl, perlPackages, wrapGAppsHook,
   # libs
   librsvg, sane-backends, sane-frontends,
   # runtime dependencies
diff --git a/pkgs/applications/graphics/hydrus/default.nix b/pkgs/applications/graphics/hydrus/default.nix
index 95b96bcff1b3a..f5b8b80621557 100644
--- a/pkgs/applications/graphics/hydrus/default.nix
+++ b/pkgs/applications/graphics/hydrus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , lzma
 , qt5
diff --git a/pkgs/applications/graphics/ipe/default.nix b/pkgs/applications/graphics/ipe/default.nix
index 1ea21506e314c..d9c51d38802e6 100644
--- a/pkgs/applications/graphics/ipe/default.nix
+++ b/pkgs/applications/graphics/ipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
+{ lib, fetchurl, makeWrapper, pkg-config, zlib, freetype, cairo, lua5, texlive, ghostscript
 , libjpeg, libpng, qtbase, mkDerivation
 }:
 
diff --git a/pkgs/applications/graphics/kgraphviewer/default.nix b/pkgs/applications/graphics/kgraphviewer/default.nix
index 283ed1179544d..294b6c4ca7012 100644
--- a/pkgs/applications/graphics/kgraphviewer/default.nix
+++ b/pkgs/applications/graphics/kgraphviewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, pkg-config, wrapGAppsHook
 , kconfig, kinit, kdoctools, kio, kparts, kwidgetsaddons
 , qtbase, qtsvg
 , boost, graphviz
diff --git a/pkgs/applications/graphics/krop/default.nix b/pkgs/applications/graphics/krop/default.nix
index 314e4c6ec140f..ef335cd6be2a0 100644
--- a/pkgs/applications/graphics/krop/default.nix
+++ b/pkgs/applications/graphics/krop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
+{ lib, fetchFromGitHub, python3Packages, libsForQt5, ghostscript, qt5}:
 
 python3Packages.buildPythonApplication rec {
   pname = "krop";
diff --git a/pkgs/applications/graphics/luminance-hdr/default.nix b/pkgs/applications/graphics/luminance-hdr/default.nix
index 36154af137bd1..c44ff57d18f3c 100644
--- a/pkgs/applications/graphics/luminance-hdr/default.nix
+++ b/pkgs/applications/graphics/luminance-hdr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, cmake, fetchFromGitHub, pkg-config
+{ lib, mkDerivation, cmake, fetchFromGitHub, pkg-config
 , boost, exiv2, fftwFloat, gsl
 , ilmbase, lcms2, libraw, libtiff, openexr
 , qtbase, qtdeclarative, qttools, qtwebengine, eigen
diff --git a/pkgs/applications/graphics/mcomix3/default.nix b/pkgs/applications/graphics/mcomix3/default.nix
index 81077578eb272..add40043c0faf 100644
--- a/pkgs/applications/graphics/mcomix3/default.nix
+++ b/pkgs/applications/graphics/mcomix3/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , wrapGAppsHook
 , installShellFiles
diff --git a/pkgs/applications/graphics/meme/default.nix b/pkgs/applications/graphics/meme/default.nix
index c894de2c93308..d06ff027c5bb5 100644
--- a/pkgs/applications/graphics/meme/default.nix
+++ b/pkgs/applications/graphics/meme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , unstableGitUpdater
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/graphics/mypaint/default.nix b/pkgs/applications/graphics/mypaint/default.nix
index 9da9c20942ecb..7b83bdec8c6bc 100644
--- a/pkgs/applications/graphics/mypaint/default.nix
+++ b/pkgs/applications/graphics/mypaint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , gtk3
 , gettext
diff --git a/pkgs/applications/graphics/nomacs/default.nix b/pkgs/applications/graphics/nomacs/default.nix
index 8a3e41965ffe5..bd6d732ac684d 100644
--- a/pkgs/applications/graphics/nomacs/default.nix
+++ b/pkgs/applications/graphics/nomacs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/applications/graphics/paraview/default.nix b/pkgs/applications/graphics/paraview/default.nix
index 7bbff5499f65e..79feab3ab7aed 100644
--- a/pkgs/applications/graphics/paraview/default.nix
+++ b/pkgs/applications/graphics/paraview/default.nix
@@ -1,6 +1,6 @@
 { boost, cmake, fetchFromGitHub, ffmpeg, qtbase, qtx11extras,
   qttools, qtxmlpatterns, qtsvg, gdal, gfortran, libXt, makeWrapper,
-  mkDerivation, ninja, mpi, python3, lib, stdenv, tbb, libGLU, libGL }:
+  mkDerivation, ninja, mpi, python3, lib, tbb, libGLU, libGL }:
 
 mkDerivation rec {
   pname = "paraview";
diff --git a/pkgs/applications/graphics/pdfcpu/default.nix b/pkgs/applications/graphics/pdfcpu/default.nix
index bcc094981214f..857a68df09238 100644
--- a/pkgs/applications/graphics/pdfcpu/default.nix
+++ b/pkgs/applications/graphics/pdfcpu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pdfcpu";
diff --git a/pkgs/applications/graphics/photoflare/default.nix b/pkgs/applications/graphics/photoflare/default.nix
index ca2455dd048c9..0c25364b76aa3 100644
--- a/pkgs/applications/graphics/photoflare/default.nix
+++ b/pkgs/applications/graphics/photoflare/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
+{ mkDerivation, lib, graphicsmagick, fetchFromGitHub, qmake, qtbase, qttools
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/graphics/photoqt/default.nix b/pkgs/applications/graphics/photoqt/default.nix
index fe49d5fa154db..52e38b23c1ff2 100644
--- a/pkgs/applications/graphics/photoqt/default.nix
+++ b/pkgs/applications/graphics/photoqt/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
+{ mkDerivation, lib, fetchurl, cmake, exiv2, graphicsmagick, libraw, fetchpatch
 , qtbase, qtdeclarative, qtmultimedia, qtquickcontrols, qttools, qtgraphicaleffects
 , extra-cmake-modules, poppler, kimageformats, libarchive, libdevil
 }:
diff --git a/pkgs/applications/graphics/phototonic/default.nix b/pkgs/applications/graphics/phototonic/default.nix
index 21960358a7bd5..5044e60161cf4 100644
--- a/pkgs/applications/graphics/phototonic/default.nix
+++ b/pkgs/applications/graphics/phototonic/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qmake, exiv2 }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qmake, exiv2 }:
 
 mkDerivation rec {
   pname = "phototonic";
diff --git a/pkgs/applications/graphics/pick-colour-picker/default.nix b/pkgs/applications/graphics/pick-colour-picker/default.nix
index d4788b3c1e764..e3ab0c772a1dc 100644
--- a/pkgs/applications/graphics/pick-colour-picker/default.nix
+++ b/pkgs/applications/graphics/pick-colour-picker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pygobject3
diff --git a/pkgs/applications/graphics/pinta/default.nix b/pkgs/applications/graphics/pinta/default.nix
index 8b6e581ae0b1a..2635b2d3d8863 100644
--- a/pkgs/applications/graphics/pinta/default.nix
+++ b/pkgs/applications/graphics/pinta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
+{ lib, fetchFromGitHub, buildDotnetPackage, dotnetPackages, gtksharp,
   gettext }:
 
 let
diff --git a/pkgs/applications/graphics/qcomicbook/default.nix b/pkgs/applications/graphics/qcomicbook/default.nix
index c4fc79c7fecd6..47bf2d9502836 100644
--- a/pkgs/applications/graphics/qcomicbook/default.nix
+++ b/pkgs/applications/graphics/qcomicbook/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
+{ mkDerivation, lib, fetchFromGitHub, pkg-config, cmake, qtbase, qttools, qtx11extras, poppler }:
 
 mkDerivation rec {
   pname = "qcomicbook";
diff --git a/pkgs/applications/graphics/rapid-photo-downloader/default.nix b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
index 26522d78bcdd0..f444ebfe5be3d 100644
--- a/pkgs/applications/graphics/rapid-photo-downloader/default.nix
+++ b/pkgs/applications/graphics/rapid-photo-downloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivationWith, fetchurl, python3Packages
+{ lib, mkDerivationWith, fetchurl, python3Packages
 , file, intltool, gobject-introspection, libgudev
 , udisks, gexiv2, gst_all_1, libnotify
 , exiftool, gdk-pixbuf, libmediainfo, vmtouch
diff --git a/pkgs/applications/graphics/renderdoc/default.nix b/pkgs/applications/graphics/renderdoc/default.nix
index b985ae7d57167..c51794881e945 100644
--- a/pkgs/applications/graphics/renderdoc/default.nix
+++ b/pkgs/applications/graphics/renderdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config, mkDerivation
+{ lib, fetchFromGitHub, cmake, pkg-config, mkDerivation
 , qtbase, qtx11extras, qtsvg, makeWrapper
 , vulkan-loader, libglvnd, xorg, python3, python3Packages
 , bison, pcre, automake, autoconf, addOpenGLRunpath
diff --git a/pkgs/applications/graphics/scantailor/advanced.nix b/pkgs/applications/graphics/scantailor/advanced.nix
index 361f1fa180949..048b8b56fc082 100644
--- a/pkgs/applications/graphics/scantailor/advanced.nix
+++ b/pkgs/applications/graphics/scantailor/advanced.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , cmake, libjpeg, libpng, libtiff, boost
 , qtbase, qttools }:
 
diff --git a/pkgs/applications/graphics/tesseract/wrapper.nix b/pkgs/applications/graphics/tesseract/wrapper.nix
index 22751f38fe1e5..313920d8154e2 100644
--- a/pkgs/applications/graphics/tesseract/wrapper.nix
+++ b/pkgs/applications/graphics/tesseract/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, makeWrapper, tesseractBase, languages
+{ lib, makeWrapper, tesseractBase, languages
 
 # A list of languages like [ "eng" "spa" … ] or `null` for all available languages
 , enableLanguages ? null
diff --git a/pkgs/applications/logging/humioctl/default.nix b/pkgs/applications/logging/humioctl/default.nix
index 0130017356c78..f3aef213ad28c 100644
--- a/pkgs/applications/logging/humioctl/default.nix
+++ b/pkgs/applications/logging/humioctl/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, installShellFiles, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, installShellFiles, lib }:
 
 let
   humioCtlVersion = "0.28.2";
diff --git a/pkgs/applications/misc/antfs-cli/default.nix b/pkgs/applications/misc/antfs-cli/default.nix
index 133194f7af516..516b786222db6 100644
--- a/pkgs/applications/misc/antfs-cli/default.nix
+++ b/pkgs/applications/misc/antfs-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   pname = "antfs-cli";
diff --git a/pkgs/applications/misc/ape/apeclex.nix b/pkgs/applications/misc/ape/apeclex.nix
index b01bfbedb8a6b..81096d9877f76 100644
--- a/pkgs/applications/misc/ape/apeclex.nix
+++ b/pkgs/applications/misc/ape/apeclex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, attemptoClex, callPackage }:
+{ lib, attemptoClex, callPackage }:
 
 callPackage ./. {
   pname = "ape-clex";
diff --git a/pkgs/applications/misc/archivy/default.nix b/pkgs/applications/misc/archivy/default.nix
index c94011466ec35..4fa3d5cf4199c 100644
--- a/pkgs/applications/misc/archivy/default.nix
+++ b/pkgs/applications/misc/archivy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchPypi, appdirs, attrs, requests,
+{ lib, python3, fetchPypi, appdirs, attrs, requests,
 beautifulsoup4, click-plugins, elasticsearch, flask_login, flask_wtf,
 pypandoc, python-dotenv, python-frontmatter, tinydb, validators,
 watchdog, wtforms }:
diff --git a/pkgs/applications/misc/ausweisapp2/default.nix b/pkgs/applications/misc/ausweisapp2/default.nix
index 82e7c1bb21bc6..bd3194e3fea2b 100644
--- a/pkgs/applications/misc/ausweisapp2/default.nix
+++ b/pkgs/applications/misc/ausweisapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, pcsclite, qtsvg, qttools, qtwebsockets
 , qtquickcontrols2, qtgraphicaleffects }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/autospotting/default.nix b/pkgs/applications/misc/autospotting/default.nix
index 0b57ad292661c..ac929bfa5b152 100644
--- a/pkgs/applications/misc/autospotting/default.nix
+++ b/pkgs/applications/misc/autospotting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "autospotting";
diff --git a/pkgs/applications/misc/barrier/default.nix b/pkgs/applications/misc/barrier/default.nix
index fa5980b115eee..b9dbcf529be12 100644
--- a/pkgs/applications/misc/barrier/default.nix
+++ b/pkgs/applications/misc/barrier/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
+{ lib, fetchFromGitHub, cmake, curl, xorg, avahi, qtbase, mkDerivation,
   openssl, wrapGAppsHook,
   avahiWithLibdnssdCompat ? avahi.override { withLibdnssdCompat = true; }
 }:
diff --git a/pkgs/applications/misc/bibletime/default.nix b/pkgs/applications/misc/bibletime/default.nix
index 3213ed9edf0dc..eb909155e4e1b 100644
--- a/pkgs/applications/misc/bibletime/default.nix
+++ b/pkgs/applications/misc/bibletime/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchurl, cmake, pkg-config, sword, boost, clucene_core
+{ lib, mkDerivation, fetchurl, cmake, pkg-config, sword, boost, clucene_core
 , qtbase, qttools, qtsvg, qtwebkit
 }:
 
diff --git a/pkgs/applications/misc/bleachbit/default.nix b/pkgs/applications/misc/bleachbit/default.nix
index 89686e50d175b..952d1fe16db66 100644
--- a/pkgs/applications/misc/bleachbit/default.nix
+++ b/pkgs/applications/misc/bleachbit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , fetchurl
 , gettext
diff --git a/pkgs/applications/misc/break-time/default.nix b/pkgs/applications/misc/break-time/default.nix
index 05815e242f024..3458ac3f25076 100644
--- a/pkgs/applications/misc/break-time/default.nix
+++ b/pkgs/applications/misc/break-time/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wrapGAppsHook
 }:
 
diff --git a/pkgs/applications/misc/buku/default.nix b/pkgs/applications/misc/buku/default.nix
index 772754ecc6d55..68b4f7b3e5600 100644
--- a/pkgs/applications/misc/buku/default.nix
+++ b/pkgs/applications/misc/buku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs; buildPythonApplication rec {
   version = "4.5";
diff --git a/pkgs/applications/misc/candle/default.nix b/pkgs/applications/misc/candle/default.nix
index d3357b41bd2e3..8df75b0cbd196 100644
--- a/pkgs/applications/misc/candle/default.nix
+++ b/pkgs/applications/misc/candle/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qtserialport, qmake }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qtserialport, qmake }:
 
 mkDerivation rec {
   pname = "candle";
diff --git a/pkgs/applications/misc/cheat/default.nix b/pkgs/applications/misc/cheat/default.nix
index 988af330deb59..90eb38329a326 100644
--- a/pkgs/applications/misc/cheat/default.nix
+++ b/pkgs/applications/misc/cheat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildGoModule, installShellFiles }:
 
 buildGoModule rec {
diff --git a/pkgs/applications/misc/chewing-editor/default.nix b/pkgs/applications/misc/chewing-editor/default.nix
index fb5d9aed95966..13ee17999fe11 100644
--- a/pkgs/applications/misc/chewing-editor/default.nix
+++ b/pkgs/applications/misc/chewing-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
+{ lib, mkDerivation, fetchFromGitHub, cmake, pkg-config, libchewing, qtbase
 , qttools }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/coursera-dl/default.nix b/pkgs/applications/misc/coursera-dl/default.nix
index 631d53b506fc0..56938f5338dc6 100644
--- a/pkgs/applications/misc/coursera-dl/default.nix
+++ b/pkgs/applications/misc/coursera-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, glibcLocales, pandoc, python3 }:
+{ lib, fetchFromGitHub, glibcLocales, pandoc, python3 }:
 
 let
   pythonPackages = python3.pkgs;
diff --git a/pkgs/applications/misc/crow-translate/default.nix b/pkgs/applications/misc/crow-translate/default.nix
index 7b9d7faba9404..8cb87274c1dc3 100644
--- a/pkgs/applications/misc/crow-translate/default.nix
+++ b/pkgs/applications/misc/crow-translate/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , mkDerivation
 , fetchFromGitHub
 , substituteAll
diff --git a/pkgs/applications/misc/cum/default.nix b/pkgs/applications/misc/cum/default.nix
index 6b851e80f3468..42df68f6721a6 100644
--- a/pkgs/applications/misc/cum/default.nix
+++ b/pkgs/applications/misc/cum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/cura/lulzbot/libarcus.nix b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
index 1e186bdf5fd2a..7b1dbf4d85ef5 100644
--- a/pkgs/applications/misc/cura/lulzbot/libarcus.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libarcus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
+{ lib, buildPythonPackage, fetchgit, fetchurl, cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage {
   pname = "libarcus";
diff --git a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
index fb920235031f1..f12059e6317b5 100644
--- a/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
+++ b/pkgs/applications/misc/cura/lulzbot/libsavitar.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
+{ lib, buildPythonPackage, pythonOlder, fetchgit, cmake, sip }:
 
 buildPythonPackage {
   pname = "libsavitar-lulzbot";
diff --git a/pkgs/applications/misc/cura/lulzbot/uranium.nix b/pkgs/applications/misc/cura/lulzbot/uranium.nix
index 77a4f3edef655..01166092b2b59 100644
--- a/pkgs/applications/misc/cura/lulzbot/uranium.nix
+++ b/pkgs/applications/misc/cura/lulzbot/uranium.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, callPackage, fetchurl, fetchgit, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcusLulzbot, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage {
diff --git a/pkgs/applications/misc/dasel/default.nix b/pkgs/applications/misc/dasel/default.nix
index 3a46b5e2f9a61..2074231137572 100644
--- a/pkgs/applications/misc/dasel/default.nix
+++ b/pkgs/applications/misc/dasel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/devdocs-desktop/default.nix b/pkgs/applications/misc/devdocs-desktop/default.nix
index 3425ceb44a932..fe15d90f254c5 100644
--- a/pkgs/applications/misc/devdocs-desktop/default.nix
+++ b/pkgs/applications/misc/devdocs-desktop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
+{ lib, appimageTools, fetchurl, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "0.7.1";
diff --git a/pkgs/applications/misc/dfilemanager/default.nix b/pkgs/applications/misc/dfilemanager/default.nix
index 6af92285c2b0f..19cfa95a88e40 100644
--- a/pkgs/applications/misc/dfilemanager/default.nix
+++ b/pkgs/applications/misc/dfilemanager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, file, qtbase, qttools, solid }:
 
 mkDerivation {
   pname = "dfilemanager";
diff --git a/pkgs/applications/misc/diffpdf/default.nix b/pkgs/applications/misc/diffpdf/default.nix
index c1a4d5e444053..30715dd51f358 100644
--- a/pkgs/applications/misc/diffpdf/default.nix
+++ b/pkgs/applications/misc/diffpdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
+{ lib, mkDerivation, fetchurl, fetchpatch, qmake, qttools, qtbase, poppler }:
 
 mkDerivation rec {
   version = "2.1.3";
diff --git a/pkgs/applications/misc/dmensamenu/default.nix b/pkgs/applications/misc/dmensamenu/default.nix
index a0b4237c7f675..a8817a542e310 100644
--- a/pkgs/applications/misc/dmensamenu/default.nix
+++ b/pkgs/applications/misc/dmensamenu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
+{ lib, buildPythonApplication, fetchFromGitHub, substituteAll, requests, dmenu }:
 
 buildPythonApplication rec {
   pname = "dmensamenu";
diff --git a/pkgs/applications/misc/dockbarx/default.nix b/pkgs/applications/misc/dockbarx/default.nix
index e0e9fcd6febfd..b31c17cc319a7 100644
--- a/pkgs/applications/misc/dockbarx/default.nix
+++ b/pkgs/applications/misc/dockbarx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
+{ lib, fetchFromGitHub, pythonPackages, gnome2, keybinder }:
 
 pythonPackages.buildPythonApplication rec {
   ver = "0.93";
diff --git a/pkgs/applications/misc/dotfiles/default.nix b/pkgs/applications/misc/dotfiles/default.nix
index 913ed9523baae..911a319a963f8 100644
--- a/pkgs/applications/misc/dotfiles/default.nix
+++ b/pkgs/applications/misc/dotfiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "dotfiles";
diff --git a/pkgs/applications/misc/dstask/default.nix b/pkgs/applications/misc/dstask/default.nix
index 78efa133c1e4f..cd1c659ec5bcb 100644
--- a/pkgs/applications/misc/dstask/default.nix
+++ b/pkgs/applications/misc/dstask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dstask";
diff --git a/pkgs/applications/misc/dupeguru/default.nix b/pkgs/applications/misc/dupeguru/default.nix
index 418658fec2282..d2332b4d9c7d8 100644
--- a/pkgs/applications/misc/dupeguru/default.nix
+++ b/pkgs/applications/misc/dupeguru/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
+{lib, python3Packages, fetchpatch, gettext, qt5, fetchFromGitHub}:
 
 python3Packages.buildPythonApplication rec {
   pname = "dupeguru";
diff --git a/pkgs/applications/misc/electrum/dash.nix b/pkgs/applications/misc/electrum/dash.nix
index 29ac8b4484b57..d0606001ad432 100644
--- a/pkgs/applications/misc/electrum/dash.nix
+++ b/pkgs/applications/misc/electrum/dash.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   version = "2.9.3.1";
diff --git a/pkgs/applications/misc/electrum/ltc.nix b/pkgs/applications/misc/electrum/ltc.nix
index ad6ed6f7a783c..bd015afdc5720 100644
--- a/pkgs/applications/misc/electrum/ltc.nix
+++ b/pkgs/applications/misc/electrum/ltc.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python3Packages
 , wrapQtAppsHook
diff --git a/pkgs/applications/misc/elfx86exts/default.nix b/pkgs/applications/misc/elfx86exts/default.nix
index 8fc7fb32743db..690b88d8417e5 100644
--- a/pkgs/applications/misc/elfx86exts/default.nix
+++ b/pkgs/applications/misc/elfx86exts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/exercism/default.nix b/pkgs/applications/misc/exercism/default.nix
index 1eeeba1b4391f..79420eacec827 100644
--- a/pkgs/applications/misc/exercism/default.nix
+++ b/pkgs/applications/misc/exercism/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "exercism";
diff --git a/pkgs/applications/misc/expenses/default.nix b/pkgs/applications/misc/expenses/default.nix
index 7f932b5b1e564..63f942c2c5934 100644
--- a/pkgs/applications/misc/expenses/default.nix
+++ b/pkgs/applications/misc/expenses/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , sqlite
diff --git a/pkgs/applications/misc/fbmenugen/default.nix b/pkgs/applications/misc/fbmenugen/default.nix
index 26b8beab19cdc..36629179ab585 100644
--- a/pkgs/applications/misc/fbmenugen/default.nix
+++ b/pkgs/applications/misc/fbmenugen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fluxbox
 , gnused
diff --git a/pkgs/applications/misc/geoipupdate/default.nix b/pkgs/applications/misc/geoipupdate/default.nix
index 1e0aba0400f0a..12b5a38877acf 100644
--- a/pkgs/applications/misc/geoipupdate/default.nix
+++ b/pkgs/applications/misc/geoipupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "geoipupdate";
diff --git a/pkgs/applications/misc/get_iplayer/default.nix b/pkgs/applications/misc/get_iplayer/default.nix
index 6664974a41ad0..d4f50451719b1 100644
--- a/pkgs/applications/misc/get_iplayer/default.nix
+++ b/pkgs/applications/misc/get_iplayer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
+{ lib, fetchFromGitHub, atomicparsley, flvstreamer, ffmpeg_3, makeWrapper, perl, perlPackages, rtmpdump}:
 
 with lib;
 
diff --git a/pkgs/applications/misc/go-jira/default.nix b/pkgs/applications/misc/go-jira/default.nix
index c2871766debb1..2f2a0a22126eb 100644
--- a/pkgs/applications/misc/go-jira/default.nix
+++ b/pkgs/applications/misc/go-jira/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-jira";
diff --git a/pkgs/applications/misc/golden-cheetah/default.nix b/pkgs/applications/misc/golden-cheetah/default.nix
index 57e2d95f0430b..fa58c2d3965ae 100644
--- a/pkgs/applications/misc/golden-cheetah/default.nix
+++ b/pkgs/applications/misc/golden-cheetah/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, mkDerivation
+{ lib, fetchFromGitHub, fetchpatch, mkDerivation
 , qtbase, qtsvg, qtserialport, qtwebengine, qtmultimedia, qttools
 , qtconnectivity, qtcharts, libusb-compat-0_1
 , yacc, flex, zlib, qmake, makeDesktopItem, makeWrapper
diff --git a/pkgs/applications/misc/gpsbabel/gui.nix b/pkgs/applications/misc/gpsbabel/gui.nix
index 3de63203f24c9..4025b313128b5 100644
--- a/pkgs/applications/misc/gpsbabel/gui.nix
+++ b/pkgs/applications/misc/gpsbabel/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
+{ lib, mkDerivation, qmake, qttools, qtwebkit, qttranslations, gpsbabel }:
 
 mkDerivation {
   pname = "gpsbabel-gui";
diff --git a/pkgs/applications/misc/gramps/default.nix b/pkgs/applications/misc/gramps/default.nix
index 4fc4586ca4e3d..1628f0473fa67 100644
--- a/pkgs/applications/misc/gramps/default.nix
+++ b/pkgs/applications/misc/gramps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
+{ lib, fetchFromGitHub, gtk3, pythonPackages, intltool, gexiv2,
   pango, gobject-introspection, wrapGAppsHook, gettext,
 # Optional packages:
  enableOSM ? true, osm-gps-map,
diff --git a/pkgs/applications/misc/gsctl/default.nix b/pkgs/applications/misc/gsctl/default.nix
index 101baa093966e..15d8b96639603 100644
--- a/pkgs/applications/misc/gsctl/default.nix
+++ b/pkgs/applications/misc/gsctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gsctl";
diff --git a/pkgs/applications/misc/hamster/default.nix b/pkgs/applications/misc/hamster/default.nix
index 855123ef79312..dbf7e1aee746e 100644
--- a/pkgs/applications/misc/hamster/default.nix
+++ b/pkgs/applications/misc/hamster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, intltool, glib, itstool
+{ lib, fetchFromGitHub, python3Packages, intltool, glib, itstool
 , wrapGAppsHook, gobject-introspection, pango, gdk-pixbuf, atk, wafHook }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/misc/haxor-news/default.nix b/pkgs/applications/misc/haxor-news/default.nix
index 467cbfad65685..fc9607e7be6b1 100644
--- a/pkgs/applications/misc/haxor-news/default.nix
+++ b/pkgs/applications/misc/haxor-news/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, fetchpatch }:
+{ lib, fetchFromGitHub, python3, fetchpatch }:
 
 
 let
diff --git a/pkgs/applications/misc/hivemind/default.nix b/pkgs/applications/misc/hivemind/default.nix
index fc22d3a854a6e..6ada1fd749bda 100644
--- a/pkgs/applications/misc/hivemind/default.nix
+++ b/pkgs/applications/misc/hivemind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, runtimeShell }:
+{ lib, buildGoPackage, fetchFromGitHub, runtimeShell }:
 
 buildGoPackage rec {
   pname = "hivemind";
diff --git a/pkgs/applications/misc/hugo/default.nix b/pkgs/applications/misc/hugo/default.nix
index 2d2ccefe934ee..35246a45da27a 100644
--- a/pkgs/applications/misc/hugo/default.nix
+++ b/pkgs/applications/misc/hugo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "hugo";
diff --git a/pkgs/applications/misc/jrnl/default.nix b/pkgs/applications/misc/jrnl/default.nix
index 7fc8ef88330f3..79f87612e49a8 100644
--- a/pkgs/applications/misc/jrnl/default.nix
+++ b/pkgs/applications/misc/jrnl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 }:
 
diff --git a/pkgs/applications/misc/k4dirstat/default.nix b/pkgs/applications/misc/k4dirstat/default.nix
index 341341c3ca889..467945af6ac82 100644
--- a/pkgs/applications/misc/k4dirstat/default.nix
+++ b/pkgs/applications/misc/k4dirstat/default.nix
@@ -6,7 +6,7 @@
 , kio
 , kjobwidgets
 , kxmlgui
-, lib, stdenv
+, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/keepass/default.nix b/pkgs/applications/misc/keepass/default.nix
index c1d9448c6a6dd..59d986321dd36 100644
--- a/pkgs/applications/misc/keepass/default.nix
+++ b/pkgs/applications/misc/keepass/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
+{ lib, fetchurl, buildDotnetPackage, substituteAll, makeWrapper, makeDesktopItem,
   unzip, icoutils, gtk2, xorg, xdotool, xsel, coreutils, unixtools, glib, plugins ? [] }:
 
 with builtins; buildDotnetPackage rec {
diff --git a/pkgs/applications/misc/khard/default.nix b/pkgs/applications/misc/khard/default.nix
index 5effc88acb003..3bec8db06874d 100644
--- a/pkgs/applications/misc/khard/default.nix
+++ b/pkgs/applications/misc/khard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, glibcLocales, python3 }:
+{ lib, glibcLocales, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   version = "0.17.0";
diff --git a/pkgs/applications/misc/kondo/default.nix b/pkgs/applications/misc/kondo/default.nix
index 545dc85efebfa..dcbeb40875992 100644
--- a/pkgs/applications/misc/kondo/default.nix
+++ b/pkgs/applications/misc/kondo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kondo";
diff --git a/pkgs/applications/misc/kupfer/default.nix b/pkgs/applications/misc/kupfer/default.nix
index ce21ea75b3070..243583b876277 100644
--- a/pkgs/applications/misc/kupfer/default.nix
+++ b/pkgs/applications/misc/kupfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , intltool
 , python3Packages
diff --git a/pkgs/applications/misc/loxodo/default.nix b/pkgs/applications/misc/loxodo/default.nix
index e32535d4445e7..65f9a9f0f17e4 100644
--- a/pkgs/applications/misc/loxodo/default.nix
+++ b/pkgs/applications/misc/loxodo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python27Packages, fetchgit }:
+{ lib, python27Packages, fetchgit }:
 let
   py = python27Packages;
   python = py.python;
diff --git a/pkgs/applications/misc/madonctl/default.nix b/pkgs/applications/misc/madonctl/default.nix
index 249ed48bd1c4f..2a65fc25af2f3 100644
--- a/pkgs/applications/misc/madonctl/default.nix
+++ b/pkgs/applications/misc/madonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "madonctl";
diff --git a/pkgs/applications/misc/mediaelch/default.nix b/pkgs/applications/misc/mediaelch/default.nix
index f19cbee8b79fa..4adfe0f652620 100644
--- a/pkgs/applications/misc/mediaelch/default.nix
+++ b/pkgs/applications/misc/mediaelch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/menumaker/default.nix b/pkgs/applications/misc/menumaker/default.nix
index 192228de5d91e..086db35a5ad52 100644
--- a/pkgs/applications/misc/menumaker/default.nix
+++ b/pkgs/applications/misc/menumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "menumaker";
diff --git a/pkgs/applications/misc/mop/default.nix b/pkgs/applications/misc/mop/default.nix
index 07102fe56f233..007965f868b15 100644
--- a/pkgs/applications/misc/mop/default.nix
+++ b/pkgs/applications/misc/mop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "mop";
diff --git a/pkgs/applications/misc/mqtt-bench/default.nix b/pkgs/applications/misc/mqtt-bench/default.nix
index c01a1b9cbc691..657ac9645deb9 100644
--- a/pkgs/applications/misc/mqtt-bench/default.nix
+++ b/pkgs/applications/misc/mqtt-bench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "mqtt-bench";
diff --git a/pkgs/applications/misc/multibootusb/default.nix b/pkgs/applications/misc/multibootusb/default.nix
index 173291183dab0..fd1ca66658921 100644
--- a/pkgs/applications/misc/multibootusb/default.nix
+++ b/pkgs/applications/misc/multibootusb/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub, libxcb, mtools, p7zip, parted, procps, qemu, unzip, zip,
   coreutils, gnugrep, which, gnused, e2fsprogs, autoPatchelfHook, gptfdisk,
-  python36Packages, qt5, runtimeShell, lib, stdenv, util-linux, wrapQtAppsHook }:
+  python36Packages, qt5, runtimeShell, lib, util-linux, wrapQtAppsHook }:
 
 # Note: Multibootusb is tricky to maintain. It relies on the
 # $PYTHONPATH variable containing some of their code, so that
diff --git a/pkgs/applications/misc/nixnote2/default.nix b/pkgs/applications/misc/nixnote2/default.nix
index b23c41e6feec2..cbb7a110c4c2d 100644
--- a/pkgs/applications/misc/nixnote2/default.nix
+++ b/pkgs/applications/misc/nixnote2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, boost
+{ lib, mkDerivation, fetchFromGitHub, boost
 , qtbase, qtwebkit, poppler, qmake, hunspell, html-tidy}:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/ocropus/default.nix b/pkgs/applications/misc/ocropus/default.nix
index 2b0986eeba66f..507399c012bb1 100644
--- a/pkgs/applications/misc/ocropus/default.nix
+++ b/pkgs/applications/misc/ocropus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pythonPackages, curl }:
+{ lib, fetchFromGitHub, fetchurl, pythonPackages, curl }:
 
 let
   getmodel = name: sha256: {
diff --git a/pkgs/applications/misc/onboard/default.nix b/pkgs/applications/misc/onboard/default.nix
index 42433936aba48..d52120e0fb7d0 100644
--- a/pkgs/applications/misc/onboard/default.nix
+++ b/pkgs/applications/misc/onboard/default.nix
@@ -1,5 +1,5 @@
 { fetchurl
-, lib, stdenv
+, lib
 , substituteAll
 , aspellWithDicts
 , at-spi2-core ? null
diff --git a/pkgs/applications/misc/opentx/default.nix b/pkgs/applications/misc/opentx/default.nix
index bb8f8d4013f1d..2ca4e3203ac1e 100644
--- a/pkgs/applications/misc/opentx/default.nix
+++ b/pkgs/applications/misc/opentx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub
+{ lib, mkDerivation, fetchFromGitHub
 , cmake, gcc-arm-embedded, python3Packages
 , qtbase, qtmultimedia, qttranslations, SDL, gtest
 , dfu-util, avrdude
diff --git a/pkgs/applications/misc/orca/default.nix b/pkgs/applications/misc/orca/default.nix
index 25cca1536f8dd..72d68431b8c08 100644
--- a/pkgs/applications/misc/orca/default.nix
+++ b/pkgs/applications/misc/orca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , buildPythonApplication
diff --git a/pkgs/applications/misc/pass-secret-service/default.nix b/pkgs/applications/misc/pass-secret-service/default.nix
index f2386a5cd83b8..932fa588d2711 100644
--- a/pkgs/applications/misc/pass-secret-service/default.nix
+++ b/pkgs/applications/misc/pass-secret-service/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, dbus, gnupg }:
+{ lib, fetchFromGitHub, python3, dbus, gnupg }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "pass-secret-service";
diff --git a/pkgs/applications/misc/pdf-quench/default.nix b/pkgs/applications/misc/pdf-quench/default.nix
index 907cceeb58b70..4255127b3dfe6 100644
--- a/pkgs/applications/misc/pdf-quench/default.nix
+++ b/pkgs/applications/misc/pdf-quench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
+{ lib, fetchFromGitHub, pkgs, python3, wrapGAppsHook}:
 
 python3.pkgs.buildPythonApplication {
   pname = "pdf-quench";
diff --git a/pkgs/applications/misc/pdfarranger/default.nix b/pkgs/applications/misc/pdfarranger/default.nix
index 8c8413b2ce606..73dd9390382e4 100644
--- a/pkgs/applications/misc/pdfarranger/default.nix
+++ b/pkgs/applications/misc/pdfarranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib
+{ fetchFromGitHub, lib
 , wrapGAppsHook, intltool
 , python3Packages, gtk3, poppler_gi
 }:
diff --git a/pkgs/applications/misc/pdfdiff/default.nix b/pkgs/applications/misc/pdfdiff/default.nix
index 31719cdfef2bd..5e489bebb25ab 100644
--- a/pkgs/applications/misc/pdfdiff/default.nix
+++ b/pkgs/applications/misc/pdfdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchurl, xpdf }:
+{ lib, pythonPackages, fetchurl, xpdf }:
 let
   py = pythonPackages;
 in
diff --git a/pkgs/applications/misc/pgmodeler/default.nix b/pkgs/applications/misc/pgmodeler/default.nix
index 67010e713c3cd..0a99d357e68f4 100644
--- a/pkgs/applications/misc/pgmodeler/default.nix
+++ b/pkgs/applications/misc/pgmodeler/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , pkg-config
 , qmake
diff --git a/pkgs/applications/misc/pipr/default.nix b/pkgs/applications/misc/pipr/default.nix
index 7332f20168947..6ca315b1092a7 100644
--- a/pkgs/applications/misc/pipr/default.nix
+++ b/pkgs/applications/misc/pipr/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , bubblewrap
 , makeWrapper
-, lib
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/misc/plover/default.nix b/pkgs/applications/misc/plover/default.nix
index 2a3368e351f74..05886a85bf0c7 100644
--- a/pkgs/applications/misc/plover/default.nix
+++ b/pkgs/applications/misc/plover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages, python36Packages, wmctrl,
+{ lib, fetchurl, python27Packages, python36Packages, wmctrl,
   qtbase, mkDerivationWith }:
 
 {
diff --git a/pkgs/applications/misc/prevo/default.nix b/pkgs/applications/misc/prevo/default.nix
index 92d7886950355..45f5889d4d5db 100644
--- a/pkgs/applications/misc/prevo/default.nix
+++ b/pkgs/applications/misc/prevo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
+{ lib, symlinkJoin, prevo-tools, prevo-data, makeWrapper }:
 
 symlinkJoin rec {
   name = "prevo-${version}";
diff --git a/pkgs/applications/misc/printrun/default.nix b/pkgs/applications/misc/printrun/default.nix
index 13f9178f330c1..631609551306d 100644
--- a/pkgs/applications/misc/printrun/default.nix
+++ b/pkgs/applications/misc/printrun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "printrun";
diff --git a/pkgs/applications/misc/pydf/default.nix b/pkgs/applications/misc/pydf/default.nix
index 0135e10d6df11..afec377e9b660 100644
--- a/pkgs/applications/misc/pydf/default.nix
+++ b/pkgs/applications/misc/pydf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "pydf";
diff --git a/pkgs/applications/misc/pyditz/cerberus.nix b/pkgs/applications/misc/pyditz/cerberus.nix
index a26b6b014da4e..5eb43c0e35759 100644
--- a/pkgs/applications/misc/pyditz/cerberus.nix
+++ b/pkgs/applications/misc/pyditz/cerberus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/applications/misc/pyditz/default.nix b/pkgs/applications/misc/pyditz/default.nix
index 268d2fb286093..5765aeba7dd02 100644
--- a/pkgs/applications/misc/pyditz/default.nix
+++ b/pkgs/applications/misc/pyditz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/misc/pytrainer/default.nix b/pkgs/applications/misc/pytrainer/default.nix
index eb775a1f60241..4e1e1f31f1983 100644
--- a/pkgs/applications/misc/pytrainer/default.nix
+++ b/pkgs/applications/misc/pytrainer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , perl
 , python3
diff --git a/pkgs/applications/misc/qdirstat/default.nix b/pkgs/applications/misc/qdirstat/default.nix
index a51bd3a80c051..7830f2035d9cd 100644
--- a/pkgs/applications/misc/qdirstat/default.nix
+++ b/pkgs/applications/misc/qdirstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, qmake
+{ lib, fetchFromGitHub, qmake
 , coreutils, xdg_utils, bash
 , makeWrapper, perlPackages, mkDerivation }:
 
diff --git a/pkgs/applications/misc/qlcplus/default.nix b/pkgs/applications/misc/qlcplus/default.nix
index c6306294ecdd2..721c95c028bc0 100644
--- a/pkgs/applications/misc/qlcplus/default.nix
+++ b/pkgs/applications/misc/qlcplus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, udev
 , qtmultimedia, qtscript, alsaLib, ola, libftdi1, libusb-compat-0_1
 , libsndfile, libmad
 }:
diff --git a/pkgs/applications/misc/qpdfview/default.nix b/pkgs/applications/misc/qpdfview/default.nix
index 0892632c1d84d..6ae81fca27cf8 100644
--- a/pkgs/applications/misc/qpdfview/default.nix
+++ b/pkgs/applications/misc/qpdfview/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
+{lib, mkDerivation, fetchurl, qmake, qtbase, qtsvg, pkg-config, poppler, djvulibre, libspectre, cups
 , file, ghostscript
 }:
 let
diff --git a/pkgs/applications/misc/qsudo/default.nix b/pkgs/applications/misc/qsudo/default.nix
index f7dbc9a90581a..5f9958f2d5d60 100644
--- a/pkgs/applications/misc/qsudo/default.nix
+++ b/pkgs/applications/misc/qsudo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/misc/qt-box-editor/default.nix b/pkgs/applications/misc/qt-box-editor/default.nix
index 5de2428250a0c..9480a32aae3d3 100644
--- a/pkgs/applications/misc/qt-box-editor/default.nix
+++ b/pkgs/applications/misc/qt-box-editor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , qtbase
 , qtsvg
diff --git a/pkgs/applications/misc/qtbitcointrader/default.nix b/pkgs/applications/misc/qtbitcointrader/default.nix
index 4ab70a5a8d7d1..fafd91f7811ce 100644
--- a/pkgs/applications/misc/qtbitcointrader/default.nix
+++ b/pkgs/applications/misc/qtbitcointrader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, qt5, mkDerivation }:
+{ lib, fetchzip, qt5, mkDerivation }:
 
 let
   version = "1.40.43";
diff --git a/pkgs/applications/misc/ranger/default.nix b/pkgs/applications/misc/ranger/default.nix
index 8394fd4c53438..619b2ba99551c 100644
--- a/pkgs/applications/misc/ranger/default.nix
+++ b/pkgs/applications/misc/ranger/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, file, less, highlight
+{ lib, fetchFromGitHub, python3Packages, file, less, highlight
 , imagePreviewSupport ? true, w3m ? null}:
 
 with lib;
diff --git a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
index 77538f2436149..800170b314a55 100644
--- a/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
+++ b/pkgs/applications/misc/remarkable/remarkable-mouse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, python3Packages }:
+{ lib, buildPythonApplication, fetchPypi, python3Packages }:
 
 buildPythonApplication rec {
   pname = "remarkable-mouse";
diff --git a/pkgs/applications/misc/remarkable/rmapi/default.nix b/pkgs/applications/misc/remarkable/rmapi/default.nix
index 22a154da4fd02..e2a5f348da573 100644
--- a/pkgs/applications/misc/remarkable/rmapi/default.nix
+++ b/pkgs/applications/misc/remarkable/rmapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "rmapi";
diff --git a/pkgs/applications/misc/remarkable/rmview/default.nix b/pkgs/applications/misc/remarkable/rmview/default.nix
index 3148bf0ccf39b..385607ec7098b 100644
--- a/pkgs/applications/misc/remarkable/rmview/default.nix
+++ b/pkgs/applications/misc/remarkable/rmview/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "rmview";
diff --git a/pkgs/applications/misc/rsclock/default.nix b/pkgs/applications/misc/rsclock/default.nix
index d7b38e2d665da..bc36b2f379e81 100644
--- a/pkgs/applications/misc/rsclock/default.nix
+++ b/pkgs/applications/misc/rsclock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "rsClock";
diff --git a/pkgs/applications/misc/rss-bridge-cli/default.nix b/pkgs/applications/misc/rss-bridge-cli/default.nix
index 4ab79440b239e..7550e6bcb95fc 100644
--- a/pkgs/applications/misc/rss-bridge-cli/default.nix
+++ b/pkgs/applications/misc/rss-bridge-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeShellScriptBin, rss-bridge, php }:
+{ lib, writeShellScriptBin, rss-bridge, php }:
 
 let
   phpWithExts = (php.withExtensions
diff --git a/pkgs/applications/misc/rtv/default.nix b/pkgs/applications/misc/rtv/default.nix
index 343936962329d..be539a37a3019 100644
--- a/pkgs/applications/misc/rtv/default.nix
+++ b/pkgs/applications/misc/rtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/snapper-gui/default.nix b/pkgs/applications/misc/snapper-gui/default.nix
index e41860551fcdc..5beacfad2f956 100644
--- a/pkgs/applications/misc/snapper-gui/default.nix
+++ b/pkgs/applications/misc/snapper-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, python3Packages
+{ lib, fetchFromGitHub, python3, python3Packages
 , gnome3, gtk3, wrapGAppsHook, gtksourceview3, snapper
 , gobject-introspection
 }:
diff --git a/pkgs/applications/misc/syncthing-tray/default.nix b/pkgs/applications/misc/syncthing-tray/default.nix
index 15ef1654e70e0..db734bff58787 100644
--- a/pkgs/applications/misc/syncthing-tray/default.nix
+++ b/pkgs/applications/misc/syncthing-tray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
+{ lib, fetchFromGitHub, buildGoPackage, pkg-config, libappindicator-gtk3 }:
 
 buildGoPackage rec {
   pname = "syncthing-tray";
diff --git a/pkgs/applications/misc/taskwarrior-tui/default.nix b/pkgs/applications/misc/taskwarrior-tui/default.nix
index ae730d597ce78..1a97f6c0feb18 100644
--- a/pkgs/applications/misc/taskwarrior-tui/default.nix
+++ b/pkgs/applications/misc/taskwarrior-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/applications/misc/termdown/default.nix b/pkgs/applications/misc/termdown/default.nix
index d8bb03138f323..562a0f0bdcbe0 100644
--- a/pkgs/applications/misc/termdown/default.nix
+++ b/pkgs/applications/misc/termdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , click
diff --git a/pkgs/applications/misc/terminal-parrot/default.nix b/pkgs/applications/misc/terminal-parrot/default.nix
index e3e64cfd68aff..b44b4bd0a7033 100644
--- a/pkgs/applications/misc/terminal-parrot/default.nix
+++ b/pkgs/applications/misc/terminal-parrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terminal-parrot";
diff --git a/pkgs/applications/misc/termpdf.py/default.nix b/pkgs/applications/misc/termpdf.py/default.nix
index 2541a17fc201a..95937ea5f2e3c 100644
--- a/pkgs/applications/misc/termpdf.py/default.nix
+++ b/pkgs/applications/misc/termpdf.py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , fetchPypi
diff --git a/pkgs/applications/misc/tickrs/default.nix b/pkgs/applications/misc/tickrs/default.nix
index ced50748d0f79..856fa60d8e637 100644
--- a/pkgs/applications/misc/tickrs/default.nix
+++ b/pkgs/applications/misc/tickrs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, perl }:
+{ lib, rustPlatform, fetchFromGitHub, perl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tickrs";
diff --git a/pkgs/applications/misc/tipp10/default.nix b/pkgs/applications/misc/tipp10/default.nix
index 0658b43626ed3..3333760a759a3 100644
--- a/pkgs/applications/misc/tipp10/default.nix
+++ b/pkgs/applications/misc/tipp10/default.nix
@@ -1,4 +1,4 @@
-{ cmake, lib, stdenv, mkDerivation, fetchFromGitLab,
+{ cmake, lib, mkDerivation, fetchFromGitLab,
   qtmultimedia, qttools, ... }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/misc/todiff/default.nix b/pkgs/applications/misc/todiff/default.nix
index bc172c9b49fbb..069a63fb66ba8 100644
--- a/pkgs/applications/misc/todiff/default.nix
+++ b/pkgs/applications/misc/todiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "todiff";
diff --git a/pkgs/applications/misc/toot/default.nix b/pkgs/applications/misc/toot/default.nix
index d992d9cdc410c..2a322b2088199 100644
--- a/pkgs/applications/misc/toot/default.nix
+++ b/pkgs/applications/misc/toot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.27.0";
diff --git a/pkgs/applications/misc/topydo/default.nix b/pkgs/applications/misc/topydo/default.nix
index 4ff3090d1f853..3ea3511308b25 100644
--- a/pkgs/applications/misc/topydo/default.nix
+++ b/pkgs/applications/misc/topydo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 
diff --git a/pkgs/applications/misc/tty-share/default.nix b/pkgs/applications/misc/tty-share/default.nix
index be9a0bafcc625..a402a669fbea7 100644
--- a/pkgs/applications/misc/tty-share/default.nix
+++ b/pkgs/applications/misc/tty-share/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 # Upstream has a `./vendor` directory with all deps which we rely upon.
 buildGoPackage rec {
diff --git a/pkgs/applications/misc/tut/default.nix b/pkgs/applications/misc/tut/default.nix
index 1fa3e9b7883a6..893f901044ac7 100644
--- a/pkgs/applications/misc/tut/default.nix
+++ b/pkgs/applications/misc/tut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tut";
diff --git a/pkgs/applications/misc/tzupdate/default.nix b/pkgs/applications/misc/tzupdate/default.nix
index 3873f8d248ebd..f6416f0f35220 100644
--- a/pkgs/applications/misc/tzupdate/default.nix
+++ b/pkgs/applications/misc/tzupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi requests;
diff --git a/pkgs/applications/misc/udiskie/default.nix b/pkgs/applications/misc/udiskie/default.nix
index e2178850da1c5..87c49a19a196f 100644
--- a/pkgs/applications/misc/udiskie/default.nix
+++ b/pkgs/applications/misc/udiskie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, asciidoc-full, gettext
+{ lib, fetchFromGitHub, asciidoc-full, gettext
 , gobject-introspection, gtk3, libappindicator-gtk3, libnotify, librsvg
 , udisks2, wrapGAppsHook
 , python3Packages
diff --git a/pkgs/applications/misc/ulauncher/default.nix b/pkgs/applications/misc/ulauncher/default.nix
index 8c17d26429372..989649ec41468 100644
--- a/pkgs/applications/misc/ulauncher/default.nix
+++ b/pkgs/applications/misc/ulauncher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , nix-update-script
 , python3Packages
diff --git a/pkgs/applications/misc/urlscan/default.nix b/pkgs/applications/misc/urlscan/default.nix
index 3e97088371aca..a56a09a8e3487 100644
--- a/pkgs/applications/misc/urlscan/default.nix
+++ b/pkgs/applications/misc/urlscan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlscan";
diff --git a/pkgs/applications/misc/valentina/default.nix b/pkgs/applications/misc/valentina/default.nix
index 1818ed9a21533..7329d8204cd73 100644
--- a/pkgs/applications/misc/valentina/default.nix
+++ b/pkgs/applications/misc/valentina/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchhg
+{ mkDerivation, lib, fetchhg
 , qmake, qttools
 , qtbase, qtsvg, qtxmlpatterns
 , poppler_utils
diff --git a/pkgs/applications/misc/vym/default.nix b/pkgs/applications/misc/vym/default.nix
index b4591d8717c62..9d820fc4da708 100644
--- a/pkgs/applications/misc/vym/default.nix
+++ b/pkgs/applications/misc/vym/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
+{ lib, mkDerivation, fetchurl, pkg-config, qmake, qtscript, qtsvg }:
 
 mkDerivation rec {
   pname = "vym";
diff --git a/pkgs/applications/misc/wego/default.nix b/pkgs/applications/misc/wego/default.nix
index 74c424a277b19..4bbd0289a156f 100644
--- a/pkgs/applications/misc/wego/default.nix
+++ b/pkgs/applications/misc/wego/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "wego";
diff --git a/pkgs/applications/misc/wikicurses/default.nix b/pkgs/applications/misc/wikicurses/default.nix
index e234a9007fd50..ec7dff141439c 100644
--- a/pkgs/applications/misc/wikicurses/default.nix
+++ b/pkgs/applications/misc/wikicurses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.4";
diff --git a/pkgs/applications/misc/xdgmenumaker/default.nix b/pkgs/applications/misc/xdgmenumaker/default.nix
index c1af7ae373c63..00ae2df100e37 100644
--- a/pkgs/applications/misc/xdgmenumaker/default.nix
+++ b/pkgs/applications/misc/xdgmenumaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitHub, txt2tags, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication rec {
   pname = "xdgmenumaker";
diff --git a/pkgs/applications/misc/yokadi/default.nix b/pkgs/applications/misc/yokadi/default.nix
index ca329521142cb..e31a69963ff09 100644
--- a/pkgs/applications/misc/yokadi/default.nix
+++ b/pkgs/applications/misc/yokadi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, dateutil,
+{ lib, fetchurl, buildPythonApplication, dateutil,
   sqlalchemy, setproctitle, icalendar }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/misc/zk-shell/default.nix b/pkgs/applications/misc/zk-shell/default.nix
index 5e27f9d45b6ab..1dbaa842ba43c 100644
--- a/pkgs/applications/misc/zk-shell/default.nix
+++ b/pkgs/applications/misc/zk-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   version = "1.0.0";
diff --git a/pkgs/applications/misc/zscroll/default.nix b/pkgs/applications/misc/zscroll/default.nix
index 748bc21ee35fe..3acac8b3c68da 100644
--- a/pkgs/applications/misc/zscroll/default.nix
+++ b/pkgs/applications/misc/zscroll/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, python3Packages, fetchFromGitHub }:
+{ lib, python3, python3Packages, fetchFromGitHub }:
 
 let version = "1.0"; in
 
diff --git a/pkgs/applications/networking/brig/default.nix b/pkgs/applications/networking/brig/default.nix
index a56a586b82a19..20b685a162fef 100644
--- a/pkgs/applications/networking/brig/default.nix
+++ b/pkgs/applications/networking/brig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brig";
diff --git a/pkgs/applications/networking/browsers/browsh/default.nix b/pkgs/applications/networking/browsers/browsh/default.nix
index aa57b9a17f648..e106eb7ff6640 100644
--- a/pkgs/applications/networking/browsers/browsh/default.nix
+++ b/pkgs/applications/networking/browsers/browsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
+{ lib, buildGoPackage, fetchurl, fetchFromGitHub, go-bindata }:
 
 let
   version = "1.6.4";
diff --git a/pkgs/applications/networking/browsers/castor/default.nix b/pkgs/applications/networking/browsers/castor/default.nix
index 6482ce59da6c0..be3d8295f9915 100644
--- a/pkgs/applications/networking/browsers/castor/default.nix
+++ b/pkgs/applications/networking/browsers/castor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/browsers/chromium/browser.nix b/pkgs/applications/networking/browsers/chromium/browser.nix
index 22d21a5efa5bd..c4a5508b7537f 100644
--- a/pkgs/applications/networking/browsers/chromium/browser.nix
+++ b/pkgs/applications/networking/browsers/chromium/browser.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
+{ lib, mkChromiumDerivation, channel, enableWideVine, ungoogled }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/browsers/eolie/default.nix b/pkgs/applications/networking/browsers/eolie/default.nix
index 6b3b63512307b..874a73dae8e84 100644
--- a/pkgs/applications/networking/browsers/eolie/default.nix
+++ b/pkgs/applications/networking/browsers/eolie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, meson, ninja, pkg-config, nix-update-script
+{ lib, fetchgit, meson, ninja, pkg-config, nix-update-script
 , python3, gtk3, libsecret, gst_all_1, webkitgtk, glib
 , glib-networking, gtkspell3, hunspell, desktop-file-utils
 , gobject-introspection, wrapGAppsHook, gnome3 }:
diff --git a/pkgs/applications/networking/browsers/qutebrowser/default.nix b/pkgs/applications/networking/browsers/qutebrowser/default.nix
index 753ea1dc08d5e..35130ab3393fb 100644
--- a/pkgs/applications/networking/browsers/qutebrowser/default.nix
+++ b/pkgs/applications/networking/browsers/qutebrowser/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchzip, python3
+{ lib, fetchurl, fetchzip, python3
 , mkDerivationWith, wrapQtAppsHook, wrapGAppsHook, qtbase, glib-networking
 , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxml2
 , libxslt, gst_all_1 ? null
diff --git a/pkgs/applications/networking/c14/default.nix b/pkgs/applications/networking/c14/default.nix
index 572975f78d0b4..3a9192164adf5 100644
--- a/pkgs/applications/networking/c14/default.nix
+++ b/pkgs/applications/networking/c14/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "c14-cli";
diff --git a/pkgs/applications/networking/cloudflared/default.nix b/pkgs/applications/networking/cloudflared/default.nix
index c82b297f9d697..810ea11b017bf 100644
--- a/pkgs/applications/networking/cloudflared/default.nix
+++ b/pkgs/applications/networking/cloudflared/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cloudflared";
diff --git a/pkgs/applications/networking/cluster/atlantis/default.nix b/pkgs/applications/networking/cluster/atlantis/default.nix
index c6f835351061d..728e23ff380f7 100644
--- a/pkgs/applications/networking/cluster/atlantis/default.nix
+++ b/pkgs/applications/networking/cluster/atlantis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "atlantis";
diff --git a/pkgs/applications/networking/cluster/docker-machine/default.nix b/pkgs/applications/networking/cluster/docker-machine/default.nix
index 5a4f6b7db0e57..c483125d851c5 100644
--- a/pkgs/applications/networking/cluster/docker-machine/default.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "machine";
diff --git a/pkgs/applications/networking/cluster/docker-machine/kvm.nix b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
index c833dea21c7e5..4940f6331d445 100644
--- a/pkgs/applications/networking/cluster/docker-machine/kvm.nix
+++ b/pkgs/applications/networking/cluster/docker-machine/kvm.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
+{ lib, buildGoPackage, fetchFromGitHub, libvirt, pkg-config }:
 
 buildGoPackage rec {
   pname = "docker-machine-kvm";
diff --git a/pkgs/applications/networking/cluster/fluxcd/default.nix b/pkgs/applications/networking/cluster/fluxcd/default.nix
index 1dadc0b7f0872..39399a7dbcf7e 100644
--- a/pkgs/applications/networking/cluster/fluxcd/default.nix
+++ b/pkgs/applications/networking/cluster/fluxcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxcd";
diff --git a/pkgs/applications/networking/cluster/fluxctl/default.nix b/pkgs/applications/networking/cluster/fluxctl/default.nix
index 896c04d6879e5..4a8f42e3cc7e8 100644
--- a/pkgs/applications/networking/cluster/fluxctl/default.nix
+++ b/pkgs/applications/networking/cluster/fluxctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "fluxctl";
diff --git a/pkgs/applications/networking/cluster/habitat/default.nix b/pkgs/applications/networking/cluster/habitat/default.nix
index f9b67b6821a6e..d9827039500cf 100644
--- a/pkgs/applications/networking/cluster/habitat/default.nix
+++ b/pkgs/applications/networking/cluster/habitat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config
+{ lib, fetchFromGitHub, rustPlatform, pkg-config
 , libsodium, libarchive, openssl, zeromq }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/networking/cluster/helm/default.nix b/pkgs/applications/networking/cluster/helm/default.nix
index 7d97896c360a6..d823e38f3f239 100644
--- a/pkgs/applications/networking/cluster/helm/default.nix
+++ b/pkgs/applications/networking/cluster/helm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "helm";
diff --git a/pkgs/applications/networking/cluster/k9s/default.nix b/pkgs/applications/networking/cluster/k9s/default.nix
index abc23058303b9..11e2b0a29153e 100644
--- a/pkgs/applications/networking/cluster/k9s/default.nix
+++ b/pkgs/applications/networking/cluster/k9s/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "k9s";
diff --git a/pkgs/applications/networking/cluster/kops/default.nix b/pkgs/applications/networking/cluster/kops/default.nix
index 98ffcd6fe6705..9b1a155a25b7f 100644
--- a/pkgs/applications/networking/cluster/kops/default.nix
+++ b/pkgs/applications/networking/cluster/kops/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, go-bindata, installShellFiles }:
 let
   goPackagePath = "k8s.io/kops";
 
diff --git a/pkgs/applications/networking/cluster/kubeless/default.nix b/pkgs/applications/networking/cluster/kubeless/default.nix
index fd7eabf12761b..38323b98b1943 100644
--- a/pkgs/applications/networking/cluster/kubeless/default.nix
+++ b/pkgs/applications/networking/cluster/kubeless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "kubeless";
diff --git a/pkgs/applications/networking/cluster/kubelogin/default.nix b/pkgs/applications/networking/cluster/kubelogin/default.nix
index c72702fdc77a5..d7f829dc00e36 100644
--- a/pkgs/applications/networking/cluster/kubelogin/default.nix
+++ b/pkgs/applications/networking/cluster/kubelogin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, go }:
+{ lib, fetchFromGitHub, buildGoModule, go }:
 
 buildGoModule rec {
   pname = "kubelogin";
diff --git a/pkgs/applications/networking/cluster/kubernix/default.nix b/pkgs/applications/networking/cluster/kubernix/default.nix
index 1411892b75b8a..88cacfea4f1a5 100644
--- a/pkgs/applications/networking/cluster/kubernix/default.nix
+++ b/pkgs/applications/networking/cluster/kubernix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "kubernix";
diff --git a/pkgs/applications/networking/cluster/kubeval/default.nix b/pkgs/applications/networking/cluster/kubeval/default.nix
index d26f8ed5dc672..28b3b71999744 100644
--- a/pkgs/applications/networking/cluster/kubeval/default.nix
+++ b/pkgs/applications/networking/cluster/kubeval/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoModule, makeWrapper }:
 
 buildGoModule rec {
   pname = "kubeval";
diff --git a/pkgs/applications/networking/cluster/linkerd/default.nix b/pkgs/applications/networking/cluster/linkerd/default.nix
index 8718da4624691..11b62f479c78e 100644
--- a/pkgs/applications/networking/cluster/linkerd/default.nix
+++ b/pkgs/applications/networking/cluster/linkerd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule {
   pname = "linkerd-unstable";
diff --git a/pkgs/applications/networking/cluster/openshift/default.nix b/pkgs/applications/networking/cluster/openshift/default.nix
index 09bf82e43fed2..53209d2edd678 100644
--- a/pkgs/applications/networking/cluster/openshift/default.nix
+++ b/pkgs/applications/networking/cluster/openshift/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
+{ lib, fetchFromGitHub, buildGoPackage, which, go-bindata, rsync, util-linux
 , coreutils, kerberos, ncurses, clang, installShellFiles
 , components ? [
   "cmd/oc"
diff --git a/pkgs/applications/networking/cluster/popeye/default.nix b/pkgs/applications/networking/cluster/popeye/default.nix
index 650532ae8b96f..89802f12be5ef 100644
--- a/pkgs/applications/networking/cluster/popeye/default.nix
+++ b/pkgs/applications/networking/cluster/popeye/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "popeye";
diff --git a/pkgs/applications/networking/cluster/ssm-agent/default.nix b/pkgs/applications/networking/cluster/ssm-agent/default.nix
index 80c8244bee1b9..928fb351c6a0e 100644
--- a/pkgs/applications/networking/cluster/ssm-agent/default.nix
+++ b/pkgs/applications/networking/cluster/ssm-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
+{ lib, fetchFromGitHub, buildGoPackage, bash, makeWrapper }:
 
 buildGoPackage rec {
   pname   = "amazon-ssm-agent";
diff --git a/pkgs/applications/networking/cluster/terraform-inventory/default.nix b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
index 7b9bf354af755..085b504314eec 100644
--- a/pkgs/applications/networking/cluster/terraform-inventory/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-inventory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub}:
+{ lib, buildGoPackage, fetchFromGitHub}:
 
 buildGoPackage rec {
   pname = "terraform-inventory";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
index 14d411c023963..b8e3c1540e94d 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-ansible";
   version = "1.0.3";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
index 0528bce81e3ca..1ee986d203032 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/cloudfoundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-cloudfoundry";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
index 47e4f30d00927..6ae781046df46 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/elasticsearch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-elasticsearch";
   version = "0.7.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
index fe508f4fa2ef6..13afa8d3818aa 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/gandi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 buildGoPackage rec {
   pname = "terraform-provider-gandi";
   version = "1.0.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
index 97331e683efb8..f9a8486693440 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-hcloud";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
index f2244345a9c3f..043e081d94edd 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/keycloak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
index 6a1f895c053bb..ed2409ead9a3e 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch, libvirt, pkg-config, makeWrapper, cdrtools }:
 
 # USAGE:
 # install the following package globally or in nix-shell:
diff --git a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
index f445d48eaee2d..4f8c44aad3f1c 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/linuxbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-linuxbox";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
index 6ccc551b4d31d..23d41ce7f1fa4 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-lxd";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
index 2bf7675875284..f2e9b86a64679 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-shell";
   version = "1.6.0";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
index f4cfe6ba02f7a..f37d1ac5d87af 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vercel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "terraform-provider-vercel";
diff --git a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
index 4f56070fa51cf..93401dfc635be 100644
--- a/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
+++ b/pkgs/applications/networking/cluster/terraform-providers/vpsadmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 buildGoModule rec {
   pname = "terraform-provider-vpsadmin";
   version = "0.1.0";
diff --git a/pkgs/applications/networking/cluster/tilt/default.nix b/pkgs/applications/networking/cluster/tilt/default.nix
index 9f2a223c4486d..2a6a808b0c931 100644
--- a/pkgs/applications/networking/cluster/tilt/default.nix
+++ b/pkgs/applications/networking/cluster/tilt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "tilt";
diff --git a/pkgs/applications/networking/cluster/velero/default.nix b/pkgs/applications/networking/cluster/velero/default.nix
index ec95b090c2e52..250d6cfc1a0fa 100644
--- a/pkgs/applications/networking/cluster/velero/default.nix
+++ b/pkgs/applications/networking/cluster/velero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "velero";
diff --git a/pkgs/applications/networking/datovka/default.nix b/pkgs/applications/networking/datovka/default.nix
index ca675dd7836c0..a48bd4ae44d55 100644
--- a/pkgs/applications/networking/datovka/default.nix
+++ b/pkgs/applications/networking/datovka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , libxml2
diff --git a/pkgs/applications/networking/dyndns/cfdyndns/default.nix b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
index 23f557a1e6da5..dae9ad3bc33c6 100644
--- a/pkgs/applications/networking/dyndns/cfdyndns/default.nix
+++ b/pkgs/applications/networking/dyndns/cfdyndns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, openssl }:
 
 with rustPlatform;
 
diff --git a/pkgs/applications/networking/feedreaders/canto-curses/default.nix b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
index 39d9aa9059611..729d12c1e5b90 100644
--- a/pkgs/applications/networking/feedreaders/canto-curses/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
+{ lib, fetchFromGitHub, python3Packages, readline, ncurses, canto-daemon }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.9";
diff --git a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
index a67e0c3aed2be..5eb8c9d74379f 100644
--- a/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
+++ b/pkgs/applications/networking/feedreaders/canto-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, }:
+{ lib, fetchFromGitHub, python3Packages, }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.9.8";
diff --git a/pkgs/applications/networking/feedreaders/feeds/default.nix b/pkgs/applications/networking/feedreaders/feeds/default.nix
index 243999553e692..8b83762089d62 100644
--- a/pkgs/applications/networking/feedreaders/feeds/default.nix
+++ b/pkgs/applications/networking/feedreaders/feeds/default.nix
@@ -1,6 +1,6 @@
 { lib
 , callPackage
-, stdenv
+
 , fetchFromGitLab
 
 , appstream
diff --git a/pkgs/applications/networking/feedreaders/rawdog/default.nix b/pkgs/applications/networking/feedreaders/rawdog/default.nix
index d24e0fbf71709..f840c191f9098 100644
--- a/pkgs/applications/networking/feedreaders/rawdog/default.nix
+++ b/pkgs/applications/networking/feedreaders/rawdog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "rawdog";
diff --git a/pkgs/applications/networking/flent/default.nix b/pkgs/applications/networking/flent/default.nix
index 5f9350b70cd8b..bcff9e4f8b745 100644
--- a/pkgs/applications/networking/flent/default.nix
+++ b/pkgs/applications/networking/flent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
+{ lib, buildPythonApplication, fetchPypi, matplotlib, procps, pyqt5, python
 , pythonPackages, qt5, sphinx, xvfb_run }:
 
 buildPythonApplication rec {
diff --git a/pkgs/applications/networking/gdrive/default.nix b/pkgs/applications/networking/gdrive/default.nix
index b51512332c5aa..b62bda3c469f9 100644
--- a/pkgs/applications/networking/gdrive/default.nix
+++ b/pkgs/applications/networking/gdrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdrive";
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index c2ca0f580c353..62fdfd71f235a 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -1,6 +1,6 @@
 { stable, branch, version, sha256Hash, mkOverride, commonOverrides }:
 
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   defaultOverrides = commonOverrides ++ [
diff --git a/pkgs/applications/networking/instant-messengers/blink/default.nix b/pkgs/applications/networking/instant-messengers/blink/default.nix
index 9dd6754af0cb1..7ed3b1673831f 100644
--- a/pkgs/applications/networking/instant-messengers/blink/default.nix
+++ b/pkgs/applications/networking/instant-messengers/blink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchdarcs, pythonPackages, libvncserver, zlib
+{ lib, fetchdarcs, pythonPackages, libvncserver, zlib
 , gnutls, libvpx, makeDesktopItem, mkDerivationWith }:
 
 mkDerivationWith pythonPackages.buildPythonApplication rec {
diff --git a/pkgs/applications/networking/instant-messengers/cordless/default.nix b/pkgs/applications/networking/instant-messengers/cordless/default.nix
index 5d95eddb6b630..a906c46c4aef5 100644
--- a/pkgs/applications/networking/instant-messengers/cordless/default.nix
+++ b/pkgs/applications/networking/instant-messengers/cordless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cordless";
diff --git a/pkgs/applications/networking/instant-messengers/coyim/default.nix b/pkgs/applications/networking/instant-messengers/coyim/default.nix
index 0de7e264ec41b..31896f20184f7 100644
--- a/pkgs/applications/networking/instant-messengers/coyim/default.nix
+++ b/pkgs/applications/networking/instant-messengers/coyim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, pkg-config,
+{ lib, buildGoPackage, fetchFromGitHub, pkg-config,
   cairo, gdk-pixbuf, glib, gnome3, wrapGAppsHook, gtk3 }:
 
 buildGoPackage rec {
diff --git a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
index fcd06326e213b..274298226ec46 100644
--- a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , makeWrapper, makeDesktopItem, mkYarnPackage
 , electron, element-web
 }:
diff --git a/pkgs/applications/networking/instant-messengers/ferdi/default.nix b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
index 458808c832da9..e4f8d3c99ee90 100644
--- a/pkgs/applications/networking/instant-messengers/ferdi/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ferdi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "ferdi";
diff --git a/pkgs/applications/networking/instant-messengers/franz/default.nix b/pkgs/applications/networking/instant-messengers/franz/default.nix
index a72ff17abcd4e..9f772bf3f6d7b 100644
--- a/pkgs/applications/networking/instant-messengers/franz/default.nix
+++ b/pkgs/applications/networking/instant-messengers/franz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkFranzDerivation, fetchurl }:
+{ lib, mkFranzDerivation, fetchurl }:
 
 mkFranzDerivation rec {
   pname = "franz";
diff --git a/pkgs/applications/networking/instant-messengers/linphone/default.nix b/pkgs/applications/networking/instant-messengers/linphone/default.nix
index a3df74a00161c..f0846fc63f7e7 100644
--- a/pkgs/applications/networking/instant-messengers/linphone/default.nix
+++ b/pkgs/applications/networking/instant-messengers/linphone/default.nix
@@ -45,7 +45,7 @@
 , readline
 , speex
 , sqlite
-, stdenv
+
 , udev
 , zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
index bca999f5762af..aadb18606e116 100644
--- a/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
+++ b/pkgs/applications/networking/instant-messengers/matrixcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit
+{ lib, fetchgit
   , buildPythonApplication, buildPythonPackage
   , pygobject3, pytestrunner, requests, responses, pytest, python-olm
   , canonicaljson, olm
diff --git a/pkgs/applications/networking/instant-messengers/mm/default.nix b/pkgs/applications/networking/instant-messengers/mm/default.nix
index 7229218a704da..c8f24e72a9ae0 100644
--- a/pkgs/applications/networking/instant-messengers/mm/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule {
   pname = "mm";
diff --git a/pkgs/applications/networking/instant-messengers/neochat/default.nix b/pkgs/applications/networking/instant-messengers/neochat/default.nix
index bcd6fdc9f3e42..cd456b336dd65 100644
--- a/pkgs/applications/networking/instant-messengers/neochat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/neochat/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , fetchFromGitLab
 , pkg-config
 , cmake
diff --git a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
index 06f02fa809468..279eea2f2d7b4 100644
--- a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, openssl }:
+{ lib, fetchFromGitHub, python2Packages, openssl }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pybitmessage";
diff --git a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
index 6881ae270f9b6..56930f561c787 100644
--- a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
+++ b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
@@ -1,6 +1,6 @@
 { pname, version, src, meta, desktopName ? "Rambox" }:
 
-{ appimageTools, stdenv, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 
 let
   name = "${pname}-${version}";
diff --git a/pkgs/applications/networking/instant-messengers/ricochet/default.nix b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
index 2a234edaa08bf..97d8d39f65671 100644
--- a/pkgs/applications/networking/instant-messengers/ricochet/default.nix
+++ b/pkgs/applications/networking/instant-messengers/ricochet/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, makeDesktopItem
+{ mkDerivation, lib, fetchurl, pkg-config, makeDesktopItem
 , qtbase, qttools, qtmultimedia, qtquick1, qtquickcontrols
 , openssl, protobuf, qmake
 }:
diff --git a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
index 55935f69e1c8c..29d4c3600c390 100644
--- a/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
+++ b/pkgs/applications/networking/instant-messengers/scudcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 let version = "1.63";
 in python3Packages.buildPythonPackage {
diff --git a/pkgs/applications/networking/instant-messengers/slack-term/default.nix b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
index 66d59346c4b14..30cc7396c562a 100644
--- a/pkgs/applications/networking/instant-messengers/slack-term/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack-term/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   # https://github.com/erroneousboat/slack-term
diff --git a/pkgs/applications/networking/instant-messengers/swift-im/default.nix b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
index 1dadc728eeefa..58335bed4218c 100644
--- a/pkgs/applications/networking/instant-messengers/swift-im/default.nix
+++ b/pkgs/applications/networking/instant-messengers/swift-im/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, pkg-config, qttools, sconsPackages
+{ mkDerivation, lib, fetchurl, pkg-config, qttools, sconsPackages
 , GConf, avahi, boost, hunspell, libXScrnSaver, libedit, libidn, libnatpmp, libxml2
 , lua, miniupnpc, openssl, qtbase, qtmultimedia, qtsvg, qtwebkit, qtx11extras, zlib
 }:
diff --git a/pkgs/applications/networking/instant-messengers/tensor/default.nix b/pkgs/applications/networking/instant-messengers/tensor/default.nix
index 93b3315c1eff1..114b3ab8f4d13 100644
--- a/pkgs/applications/networking/instant-messengers/tensor/default.nix
+++ b/pkgs/applications/networking/instant-messengers/tensor/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
+{ mkDerivation, lib, fetchgit, qtbase, qtquickcontrols, qmake, makeDesktopItem }:
 
 # we now have libqmatrixclient so a future version of tensor that supports it
 # should use that
diff --git a/pkgs/applications/networking/instant-messengers/turses/default.nix b/pkgs/applications/networking/instant-messengers/turses/default.nix
index 4c49f41f623b0..256e026a060e0 100644
--- a/pkgs/applications/networking/instant-messengers/turses/default.nix
+++ b/pkgs/applications/networking/instant-messengers/turses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchpatch, python3Packages }:
+{ lib, fetchpatch, python3Packages }:
 
 with lib;
 with python3Packages;
diff --git a/pkgs/applications/networking/instant-messengers/twinkle/default.nix b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
index 004a4dab82366..8b306c0750621 100644
--- a/pkgs/applications/networking/instant-messengers/twinkle/default.nix
+++ b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , cmake
 , libxml2
diff --git a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
index fb1f5a0a69c67..4367230f77565 100644
--- a/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
+++ b/pkgs/applications/networking/instant-messengers/xmpp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmpp-client";
diff --git a/pkgs/applications/networking/ipfs-cluster/default.nix b/pkgs/applications/networking/ipfs-cluster/default.nix
index dcb25c736570b..67d45c44868d5 100644
--- a/pkgs/applications/networking/ipfs-cluster/default.nix
+++ b/pkgs/applications/networking/ipfs-cluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipfs-cluster";
diff --git a/pkgs/applications/networking/ipfs/default.nix b/pkgs/applications/networking/ipfs/default.nix
index fd9d8bd0d347b..c54b4428819c9 100644
--- a/pkgs/applications/networking/ipfs/default.nix
+++ b/pkgs/applications/networking/ipfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl, nixosTests }:
+{ lib, buildGoModule, fetchurl, nixosTests }:
 
 buildGoModule rec {
   pname = "ipfs";
diff --git a/pkgs/applications/networking/ipget/default.nix b/pkgs/applications/networking/ipget/default.nix
index ded83f30a1af4..8817d90dd6ed1 100644
--- a/pkgs/applications/networking/ipget/default.nix
+++ b/pkgs/applications/networking/ipget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ipget";
diff --git a/pkgs/applications/networking/irc/qweechat/default.nix b/pkgs/applications/networking/irc/qweechat/default.nix
index 18a4872a44fa1..c4a67c8098a30 100644
--- a/pkgs/applications/networking/irc/qweechat/default.nix
+++ b/pkgs/applications/networking/irc/qweechat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages }:
+{ lib, fetchFromGitHub, python27Packages }:
 
 python27Packages.buildPythonApplication rec {
   version = "2016-07-29";
diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
index b77d9c984de4a..07e4dd54e5e5c 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , python
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/applications/networking/lieer/default.nix b/pkgs/applications/networking/lieer/default.nix
index aee21dca64582..3ad2762a2cfcf 100644
--- a/pkgs/applications/networking/lieer/default.nix
+++ b/pkgs/applications/networking/lieer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "lieer";
diff --git a/pkgs/applications/networking/maestral-qt/default.nix b/pkgs/applications/networking/maestral-qt/default.nix
index dbcae7a0ec37d..b568775481c14 100644
--- a/pkgs/applications/networking/maestral-qt/default.nix
+++ b/pkgs/applications/networking/maestral-qt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , python3
 , wrapQtAppsHook
diff --git a/pkgs/applications/networking/mailreaders/aerc/default.nix b/pkgs/applications/networking/mailreaders/aerc/default.nix
index b01ec9ef2cd4c..b43e6bb093c48 100644
--- a/pkgs/applications/networking/mailreaders/aerc/default.nix
+++ b/pkgs/applications/networking/mailreaders/aerc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl
+{ lib, buildGoModule, fetchurl
 , go, ncurses, notmuch, scdoc
 , python3, perl, w3m, dante
 , fetchFromGitHub
diff --git a/pkgs/applications/networking/mailreaders/afew/default.nix b/pkgs/applications/networking/mailreaders/afew/default.nix
index dbc55850f9fd1..8a5f607dd32ca 100644
--- a/pkgs/applications/networking/mailreaders/afew/default.nix
+++ b/pkgs/applications/networking/mailreaders/afew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, notmuch }:
+{ lib, python3Packages, notmuch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "afew";
diff --git a/pkgs/applications/networking/mailreaders/mailpile/default.nix b/pkgs/applications/networking/mailreaders/mailpile/default.nix
index 2cb1fd56ecca3..1d1dc030c3147 100644
--- a/pkgs/applications/networking/mailreaders/mailpile/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailpile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
+{ lib, fetchFromGitHub, python2Packages, gnupg1orig, openssl, git }:
 
 python2Packages.buildPythonApplication rec {
   pname = "mailpile";
diff --git a/pkgs/applications/networking/mailreaders/meli/default.nix b/pkgs/applications/networking/mailreaders/meli/default.nix
index 2ced5e60db438..ec50e913176e5 100644
--- a/pkgs/applications/networking/mailreaders/meli/default.nix
+++ b/pkgs/applications/networking/mailreaders/meli/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchgit
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
index ea10bf8924887..6cd0b3db78633 100644
--- a/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
+++ b/pkgs/applications/networking/mailreaders/mlarchive2maildir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, notmuch }:
+{ lib, python3, notmuch }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mlarchive2maildir";
diff --git a/pkgs/applications/networking/owncloud-client/default.nix b/pkgs/applications/networking/owncloud-client/default.nix
index 452acc1c7ca34..761d0e6b24401 100644
--- a/pkgs/applications/networking/owncloud-client/default.nix
+++ b/pkgs/applications/networking/owncloud-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
+{ lib, fetchurl, mkDerivation, cmake, pkg-config, qtbase, qtkeychain, sqlite, libsecret }:
 
 mkDerivation rec {
   pname = "owncloud-client";
diff --git a/pkgs/applications/networking/p2p/deluge/default.nix b/pkgs/applications/networking/p2p/deluge/default.nix
index 068776fe17a66..4587da48a4a0d 100644
--- a/pkgs/applications/networking/p2p/deluge/default.nix
+++ b/pkgs/applications/networking/p2p/deluge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
+{ lib, fetchurl, intltool, libtorrent-rasterbar, pythonPackages
 , gtk3, glib, gobject-introspection, librsvg, wrapGAppsHook }:
 
 pythonPackages.buildPythonPackage rec {
diff --git a/pkgs/applications/networking/p2p/zeronet/default.nix b/pkgs/applications/networking/p2p/zeronet/default.nix
index 7deddf8578bb0..4440b24a2b17a 100644
--- a/pkgs/applications/networking/p2p/zeronet/default.nix
+++ b/pkgs/applications/networking/p2p/zeronet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "zeronet";
diff --git a/pkgs/applications/networking/protocol/default.nix b/pkgs/applications/networking/protocol/default.nix
index 70723f486460a..6690a75485bda 100644
--- a/pkgs/applications/networking/protocol/default.nix
+++ b/pkgs/applications/networking/protocol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication {
   pname = "protocol-unstable";
diff --git a/pkgs/applications/networking/pyload/default.nix b/pkgs/applications/networking/pyload/default.nix
index dcfa88d9d4cd2..f70359cf7ac28 100644
--- a/pkgs/applications/networking/pyload/default.nix
+++ b/pkgs/applications/networking/pyload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
+{ lib, fetchFromGitHub, fetchpatch, pythonPackages, gocr, unrar, rhino, spidermonkey_38 }:
 
 let
   beautifulsoup = pythonPackages.callPackage ./beautifulsoup.nix {
diff --git a/pkgs/applications/networking/qv2ray/default.nix b/pkgs/applications/networking/qv2ray/default.nix
index 7c3c23a89ee67..7b97bd8543df2 100644
--- a/pkgs/applications/networking/qv2ray/default.nix
+++ b/pkgs/applications/networking/qv2ray/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , qmake
diff --git a/pkgs/applications/networking/remote/x2goclient/default.nix b/pkgs/applications/networking/remote/x2goclient/default.nix
index 7441cdf4eef7f..4156c82f91b96 100644
--- a/pkgs/applications/networking/remote/x2goclient/default.nix
+++ b/pkgs/applications/networking/remote/x2goclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
+{ lib, fetchgit, cups, libssh, libXpm, nx-libs, openldap, openssh
 , mkDerivation, qtbase, qtsvg, qtx11extras, qttools, phonon, pkg-config }:
 
 mkDerivation {
diff --git a/pkgs/applications/networking/shellhub-agent/default.nix b/pkgs/applications/networking/shellhub-agent/default.nix
index db9e112a06398..f66df96e9dbb5 100644
--- a/pkgs/applications/networking/shellhub-agent/default.nix
+++ b/pkgs/applications/networking/shellhub-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , genericUpdater
diff --git a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
index 7cfe9ddfc9714..045120813f0d7 100644
--- a/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
+++ b/pkgs/applications/networking/soulseek/nicotine-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python27Packages, geoip }:
+{ lib, fetchFromGitHub, python27Packages, geoip }:
 
 with lib;
 
diff --git a/pkgs/applications/networking/sync/acd_cli/default.nix b/pkgs/applications/networking/sync/acd_cli/default.nix
index 2f83873fbf8ef..49fc578377c23 100644
--- a/pkgs/applications/networking/sync/acd_cli/default.nix
+++ b/pkgs/applications/networking/sync/acd_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, fuse
+{ lib, fetchFromGitHub, buildPythonApplication, fuse
 , appdirs, colorama, dateutil, requests, requests_toolbelt
 , fusepy, sqlalchemy }:
 
diff --git a/pkgs/applications/networking/sync/desync/default.nix b/pkgs/applications/networking/sync/desync/default.nix
index 689a2b3fddaaf..bc2776657c204 100644
--- a/pkgs/applications/networking/sync/desync/default.nix
+++ b/pkgs/applications/networking/sync/desync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "desync";
diff --git a/pkgs/applications/networking/syncthing-gtk/default.nix b/pkgs/applications/networking/syncthing-gtk/default.nix
index a7f9c5f9f4be9..015033d6ca569 100644
--- a/pkgs/applications/networking/syncthing-gtk/default.nix
+++ b/pkgs/applications/networking/syncthing-gtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
+{ lib, fetchFromGitHub, fetchpatch, libnotify, librsvg, killall
 , gtk3, libappindicator-gtk3, substituteAll, syncthing, wrapGAppsHook
 , gnome3, buildPythonApplication, dateutil, pyinotify, pygobject3
 , bcrypt, gobject-introspection, gsettings-desktop-schemas
diff --git a/pkgs/applications/networking/twtxt/default.nix b/pkgs/applications/networking/twtxt/default.nix
index 98877880255a7..ff6e61c614f9e 100644
--- a/pkgs/applications/networking/twtxt/default.nix
+++ b/pkgs/applications/networking/twtxt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "twtxt";
diff --git a/pkgs/applications/networking/versus/default.nix b/pkgs/applications/networking/versus/default.nix
index 5e1b1e873c936..1e3dd21132693 100644
--- a/pkgs/applications/networking/versus/default.nix
+++ b/pkgs/applications/networking/versus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "versus";
diff --git a/pkgs/applications/office/beamerpresenter/default.nix b/pkgs/applications/office/beamerpresenter/default.nix
index c07b4c5e1aa19..4e8bcaee019e0 100644
--- a/pkgs/applications/office/beamerpresenter/default.nix
+++ b/pkgs/applications/office/beamerpresenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, installShellFiles,
+{ lib, mkDerivation, fetchFromGitHub, installShellFiles,
   qmake, qtbase, poppler, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/office/espanso/default.nix b/pkgs/applications/office/espanso/default.nix
index 808811e20e84d..d20e19c685924 100644
--- a/pkgs/applications/office/espanso/default.nix
+++ b/pkgs/applications/office/espanso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , pkg-config
diff --git a/pkgs/applications/office/fava/default.nix b/pkgs/applications/office/fava/default.nix
index fd5f3b8d7c55d..b070683e6f2a0 100644
--- a/pkgs/applications/office/fava/default.nix
+++ b/pkgs/applications/office/fava/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, beancount }:
+{ lib, python3, beancount }:
 
 let
   inherit (python3.pkgs) buildPythonApplication fetchPypi;
diff --git a/pkgs/applications/office/gtg/default.nix b/pkgs/applications/office/gtg/default.nix
index 52558df5da810..4c892b2605bb8 100644
--- a/pkgs/applications/office/gtg/default.nix
+++ b/pkgs/applications/office/gtg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , meson
 , python3Packages
diff --git a/pkgs/applications/office/keepnote/default.nix b/pkgs/applications/office/keepnote/default.nix
index 30b4d5fa690bd..14f48da22309e 100644
--- a/pkgs/applications/office/keepnote/default.nix
+++ b/pkgs/applications/office/keepnote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication {
   name = "keepnote-0.7.8";
diff --git a/pkgs/applications/office/ledger-autosync/default.nix b/pkgs/applications/office/ledger-autosync/default.nix
index 81e49e6e0aa93..90e5995669e84 100644
--- a/pkgs/applications/office/ledger-autosync/default.nix
+++ b/pkgs/applications/office/ledger-autosync/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
+{ lib, python3Packages, fetchFromGitHub, ledger, hledger, useLedger ? true, useHledger ? true }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ledger-autosync";
diff --git a/pkgs/applications/office/libreoffice/src-fresh/override.nix b/pkgs/applications/office/libreoffice/src-fresh/override.nix
index 8586fa1f673b0..0141b74c38903 100644
--- a/pkgs/applications/office/libreoffice/src-fresh/override.nix
+++ b/pkgs/applications/office/libreoffice/src-fresh/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, ... }:
+{ lib, kdeIntegration, ... }:
 attrs:
 {
   postConfigure = attrs.postConfigure + ''
diff --git a/pkgs/applications/office/libreoffice/src-still/override.nix b/pkgs/applications/office/libreoffice/src-still/override.nix
index 119b5a645d6ec..50812d0efb948 100644
--- a/pkgs/applications/office/libreoffice/src-still/override.nix
+++ b/pkgs/applications/office/libreoffice/src-still/override.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, kdeIntegration, fetchpatch, ... }:
+{ lib, kdeIntegration, fetchpatch, ... }:
 attrs:
 {
   patches = attrs.patches or [ ] ++ [
diff --git a/pkgs/applications/office/mytetra/default.nix b/pkgs/applications/office/mytetra/default.nix
index f48ec3fb237c6..384d7fadaf0fe 100644
--- a/pkgs/applications/office/mytetra/default.nix
+++ b/pkgs/applications/office/mytetra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
+{ lib, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
 
 let
   version = "1.44.55";
diff --git a/pkgs/applications/office/qnotero/default.nix b/pkgs/applications/office/qnotero/default.nix
index 6ffdd5fefedd5..4459e42356aaf 100644
--- a/pkgs/applications/office/qnotero/default.nix
+++ b/pkgs/applications/office/qnotero/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
+{ lib, fetchFromGitHub, python3Packages, wrapQtAppsHook }:
 
 python3Packages.buildPythonPackage rec {
   pname = "qnotero";
diff --git a/pkgs/applications/office/scribus/unstable.nix b/pkgs/applications/office/scribus/unstable.nix
index 7f4054bfb4ed9..acf44880452b7 100644
--- a/pkgs/applications/office/scribus/unstable.nix
+++ b/pkgs/applications/office/scribus/unstable.nix
@@ -22,7 +22,7 @@
 , qtbase
 , qtimageformats
 , qttools
-, lib, stdenv
+, lib
 }:
 
 let
diff --git a/pkgs/applications/office/skanlite/default.nix b/pkgs/applications/office/skanlite/default.nix
index 7436054715d89..89cf2add212c2 100644
--- a/pkgs/applications/office/skanlite/default.nix
+++ b/pkgs/applications/office/skanlite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
+{ lib, mkDerivation, fetchurl, cmake, extra-cmake-modules, qtbase,
   kcoreaddons, kdoctools, ki18n, kio, kxmlgui, ktextwidgets,
   libksane
 }:
diff --git a/pkgs/applications/office/timeular/default.nix b/pkgs/applications/office/timeular/default.nix
index 63f86171dce9b..6c1068d458446 100644
--- a/pkgs/applications/office/timeular/default.nix
+++ b/pkgs/applications/office/timeular/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchurl,
   appimageTools,
   libsecret
diff --git a/pkgs/applications/office/todoman/default.nix b/pkgs/applications/office/todoman/default.nix
index dc788a6f19574..4011879ddb839 100644
--- a/pkgs/applications/office/todoman/default.nix
+++ b/pkgs/applications/office/todoman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , glibcLocales
 , installShellFiles
diff --git a/pkgs/applications/office/tryton/default.nix b/pkgs/applications/office/tryton/default.nix
index 6b49a27a08a5b..65eb48f3b2d9c 100644
--- a/pkgs/applications/office/tryton/default.nix
+++ b/pkgs/applications/office/tryton/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , pkg-config
 , librsvg
diff --git a/pkgs/applications/office/watson/default.nix b/pkgs/applications/office/watson/default.nix
index 30992e60a6fc0..18c1b9469e75b 100644
--- a/pkgs/applications/office/watson/default.nix
+++ b/pkgs/applications/office/watson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, installShellFiles }:
+{ lib, fetchFromGitHub, pythonPackages, installShellFiles }:
 
 with pythonPackages;
 
diff --git a/pkgs/applications/radio/chirp/default.nix b/pkgs/applications/radio/chirp/default.nix
index 6b84e47909dde..e9b446dc5847c 100644
--- a/pkgs/applications/radio/chirp/default.nix
+++ b/pkgs/applications/radio/chirp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python2
 }:
diff --git a/pkgs/applications/radio/gqrx/default.nix b/pkgs/applications/radio/gqrx/default.nix
index 8a61230990976..217818f67c297 100644
--- a/pkgs/applications/radio/gqrx/default.nix
+++ b/pkgs/applications/radio/gqrx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
+{ lib, fetchFromGitHub, cmake, qtbase, qtsvg, gnuradio, boost, gr-osmosdr
 , mkDerivation
 # drivers (optional):
 , rtl-sdr, hackrf
diff --git a/pkgs/applications/radio/qsstv/default.nix b/pkgs/applications/radio/qsstv/default.nix
index d92cf9e25cdbb..e6fa95b5dc781 100644
--- a/pkgs/applications/radio/qsstv/default.nix
+++ b/pkgs/applications/radio/qsstv/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
+{ mkDerivation, lib, fetchurl, qtbase, qmake, openjpeg, pkg-config, fftw,
   libpulseaudio, alsaLib, hamlib, libv4l, fftwFloat }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/radio/quisk/default.nix b/pkgs/applications/radio/quisk/default.nix
index c0dab8773c71a..19a4e715013d4 100644
--- a/pkgs/applications/radio/quisk/default.nix
+++ b/pkgs/applications/radio/quisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python38Packages, fetchPypi
+{ lib, python38Packages, fetchPypi
 , fftw, alsaLib, pulseaudio, wxPython_4_0 }:
 
 python38Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/radio/urh/default.nix b/pkgs/applications/radio/urh/default.nix
index 3a51f77d7bd6d..00d3431b6e377 100644
--- a/pkgs/applications/radio/urh/default.nix
+++ b/pkgs/applications/radio/urh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , hackrf, rtl-sdr, airspy, limesuite, libiio
 , qt5
 , USRPSupport ? false, uhd }:
diff --git a/pkgs/applications/science/biology/eggnog-mapper/default.nix b/pkgs/applications/science/biology/eggnog-mapper/default.nix
index c6defb245c7f9..7eb3afd437af7 100644
--- a/pkgs/applications/science/biology/eggnog-mapper/default.nix
+++ b/pkgs/applications/science/biology/eggnog-mapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
+{ lib, fetchFromGitHub, fetchpatch, makeWrapper, python27Packages, wget, diamond, hmmer }:
 
 python27Packages.buildPythonApplication rec {
   pname = "eggnog-mapper";
diff --git a/pkgs/applications/science/biology/obitools/obitools3.nix b/pkgs/applications/science/biology/obitools/obitools3.nix
index 55a9612c62d0c..082a779e12bf6 100644
--- a/pkgs/applications/science/biology/obitools/obitools3.nix
+++ b/pkgs/applications/science/biology/obitools/obitools3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, cmake, python3 }:
+{ lib, fetchurl, python3Packages, cmake, python3 }:
 
 let
   pythonPackages = python3Packages;
diff --git a/pkgs/applications/science/biology/poretools/default.nix b/pkgs/applications/science/biology/poretools/default.nix
index 454843e2f324d..b2cefefb5cb55 100755
--- a/pkgs/applications/science/biology/poretools/default.nix
+++ b/pkgs/applications/science/biology/poretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 pythonPackages.buildPythonPackage rec {
   pname = "poretools";
diff --git a/pkgs/applications/science/biology/tebreak/default.nix b/pkgs/applications/science/biology/tebreak/default.nix
index b70ac29e38f79..cb606a6b34635 100644
--- a/pkgs/applications/science/biology/tebreak/default.nix
+++ b/pkgs/applications/science/biology/tebreak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
+{ lib, fetchFromGitHub, last, exonerate, minia, python3Packages, bwa
 , samtools, findutils, python }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/science/chemistry/d-seams/default.nix b/pkgs/applications/science/chemistry/d-seams/default.nix
index cbe73bb7edc25..f5e21db4b55ae 100644
--- a/pkgs/applications/science/chemistry/d-seams/default.nix
+++ b/pkgs/applications/science/chemistry/d-seams/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, stdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
+{ clangStdenv, fetchFromGitHub, catch2, rang, fmt, libyamlcpp, cmake
 , eigen, lua, luaPackages, liblapack, blas, lib, boost, gsl }:
 
 clangStdenv.mkDerivation rec {
diff --git a/pkgs/applications/science/chemistry/pymol/default.nix b/pkgs/applications/science/chemistry/pymol/default.nix
index 474986901225a..2df8b0e6d4739 100644
--- a/pkgs/applications/science/chemistry/pymol/default.nix
+++ b/pkgs/applications/science/chemistry/pymol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchFromGitHub, makeDesktopItem
+{ lib, fetchurl, fetchFromGitHub, makeDesktopItem
 , python3, python3Packages
 , glew, glm, freeglut, libpng, libxml2, tk, freetype, msgpack }:
 
diff --git a/pkgs/applications/science/electronics/caneda/default.nix b/pkgs/applications/science/electronics/caneda/default.nix
index 14c654bd6978f..6a9a491af1eeb 100644
--- a/pkgs/applications/science/electronics/caneda/default.nix
+++ b/pkgs/applications/science/electronics/caneda/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
+{ mkDerivation, lib, fetchFromGitHub, cmake, qtbase, qttools, qtsvg, qwt }:
 
 mkDerivation rec {
   pname = "caneda";
diff --git a/pkgs/applications/science/electronics/fritzing/default.nix b/pkgs/applications/science/electronics/fritzing/default.nix
index b25f76800e879..79c01d3ec718c 100644
--- a/pkgs/applications/science/electronics/fritzing/default.nix
+++ b/pkgs/applications/science/electronics/fritzing/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchpatch, fetchFromGitHub, qmake, pkg-config
+{ mkDerivation, lib, fetchpatch, fetchFromGitHub, qmake, pkg-config
 , qtbase, qtsvg, qttools, qtserialport, boost, libgit2
 }:
 
diff --git a/pkgs/applications/science/logic/petrinizer/default.nix b/pkgs/applications/science/logic/petrinizer/default.nix
index 5118795978d10..38039f61fda62 100644
--- a/pkgs/applications/science/logic/petrinizer/default.nix
+++ b/pkgs/applications/science/logic/petrinizer/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, callPackage, buildPackages
 , async, base, bytestring, containers, fetchFromGitLab, mtl
-, parallel-io, parsec, lib, stdenv, stm, transformers
+, parallel-io, parsec, lib, stm, transformers
 }:
 let
   z3 = callPackage ./z3.nix { gomp = null; z3 = buildPackages.z3; };
diff --git a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
index 96e216417df1a..f0c8dd2490482 100644
--- a/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
+++ b/pkgs/applications/science/logic/petrinizer/sbv-7.13.nix
@@ -1,7 +1,7 @@
 { mkDerivation, array, async, base, bytestring, containers
 , crackNum, deepseq, directory, doctest, filepath, generic-deriving
 , ghc, Glob, hlint, mtl, pretty, process, QuickCheck, random
-, lib, stdenv, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, lib, syb, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , template-haskell, time, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/logic/petrinizer/z3.nix b/pkgs/applications/science/logic/petrinizer/z3.nix
index 3574954c376cc..a20ccea16dc7b 100644
--- a/pkgs/applications/science/logic/petrinizer/z3.nix
+++ b/pkgs/applications/science/logic/petrinizer/z3.nix
@@ -1,5 +1,5 @@
 { mkDerivation, fetchpatch
-, base, containers, gomp, hspec, QuickCheck, lib, stdenv
+, base, containers, gomp, hspec, QuickCheck, lib
 , transformers, z3
 }:
 mkDerivation {
diff --git a/pkgs/applications/science/machine-learning/labelimg/default.nix b/pkgs/applications/science/machine-learning/labelimg/default.nix
index 4bfd4b9421f61..50d0aa6f9d1d5 100644
--- a/pkgs/applications/science/machine-learning/labelimg/default.nix
+++ b/pkgs/applications/science/machine-learning/labelimg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, qt5 }:
+{ lib, python3Packages, fetchFromGitHub, qt5 }:
   python3Packages.buildPythonApplication rec {
     pname = "labelImg";
     version = "1.8.3";
diff --git a/pkgs/applications/science/math/almonds/default.nix b/pkgs/applications/science/math/almonds/default.nix
index 7271b6d8755c2..ec3891667c58d 100644
--- a/pkgs/applications/science/math/almonds/default.nix
+++ b/pkgs/applications/science/math/almonds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 with python3.pkgs; buildPythonApplication rec {
   pname = "almonds";
diff --git a/pkgs/applications/science/math/cemu/default.nix b/pkgs/applications/science/math/cemu/default.nix
index cc8c3514a0b7d..9d56ac70d9216 100644
--- a/pkgs/applications/science/math/cemu/default.nix
+++ b/pkgs/applications/science/math/cemu/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , mkDerivation
 , SDL2
 , libGL
diff --git a/pkgs/applications/science/misc/rink/default.nix b/pkgs/applications/science/misc/rink/default.nix
index 5670969e7a2d6..4f0d1eae48728 100644
--- a/pkgs/applications/science/misc/rink/default.nix
+++ b/pkgs/applications/science/misc/rink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
+{ lib, fetchFromGitHub, rustPlatform, openssl, pkg-config, ncurses }:
 
 rustPlatform.buildRustPackage rec {
   version = "0.5.1";
diff --git a/pkgs/applications/science/misc/snakemake/default.nix b/pkgs/applications/science/misc/snakemake/default.nix
index 6b3c405a9ac2e..edf26f7ec230a 100644
--- a/pkgs/applications/science/misc/snakemake/default.nix
+++ b/pkgs/applications/science/misc/snakemake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "snakemake";
diff --git a/pkgs/applications/terminal-emulators/guake/default.nix b/pkgs/applications/terminal-emulators/guake/default.nix
index 77a052a4f1d6a..62cb6707c1b23 100644
--- a/pkgs/applications/terminal-emulators/guake/default.nix
+++ b/pkgs/applications/terminal-emulators/guake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , glibcLocales
diff --git a/pkgs/applications/terminal-emulators/terminator/default.nix b/pkgs/applications/terminal-emulators/terminator/default.nix
index 80698c56cde7f..433e5c306180b 100644
--- a/pkgs/applications/terminal-emulators/terminator/default.nix
+++ b/pkgs/applications/terminal-emulators/terminator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3
 , keybinder3
diff --git a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
index 393edc57dcc8f..47d31d6c18f63 100644
--- a/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/bump2version/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
+{ buildPythonApplication, fetchFromGitHub, isPy27, pytest, testfixtures, lib }:
 
 buildPythonApplication rec {
   pname = "bump2version";
diff --git a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
index b038e98e2dbac..4bfe06fee7478 100644
--- a/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghorg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghorg";
diff --git a/pkgs/applications/version-management/git-and-tools/ghq/default.nix b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
index c6fbf3b9569c7..f56ce386e42b4 100644
--- a/pkgs/applications/version-management/git-and-tools/ghq/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/ghq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ghq";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
index 1908b75392436..4d57820c84eb6 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-metadata-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyqt5, qt5, git-annex-adapter }:
 
 buildPythonApplication rec {
   pname = "git-annex-metadata-gui";
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
index 95e583585f19e..6d3b65547330d 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex-remote-b2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "git-annex-remote-b2";
diff --git a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
index ba4cd42d29dd2..33580712932c5 100644
--- a/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-appraise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-appraise-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
index ec832866c717a..5f84d42357345 100644
--- a/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-big-picture/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python3Packages, lib, stdenv, git, graphviz }:
+{ fetchFromGitHub, python3Packages, lib, git, graphviz }:
 
 python3Packages.buildPythonApplication rec {
   pname = "git-big-picture";
diff --git a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
index 9ca5c707b5ce0..7a24fe8e03599 100644
--- a/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-bug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "git-bug";
diff --git a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
index e7e0e009d1120..5e105ad9dd3ab 100644
--- a/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-cola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
+{ lib, fetchFromGitHub, python3Packages, gettext, git, qt5 }:
 
 let
   inherit (python3Packages) buildPythonApplication pyqt5 sip pyinotify;
diff --git a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
index 216a1035c72b7..4dc9c4f8453d6 100644
--- a/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-fame/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, bundlerEnv, ruby, bundlerUpdateScript }:
+{ lib, bundlerEnv, ruby, bundlerUpdateScript }:
 
 bundlerEnv {
   inherit ruby;
diff --git a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
index dd4e6e011a6e7..69689a49a9290 100644
--- a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages
+{ lib, fetchFromGitHub, python3Packages
 , asciidoc, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt, libxml2
 }:
 
diff --git a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
index 77e077436169e..85a84103118d4 100644
--- a/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-vanity-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "git-vanity-hash";
diff --git a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
index dc853be6772ec..25f7e95d184f7 100644
--- a/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitbatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitbatch-unstable";
diff --git a/pkgs/applications/version-management/git-and-tools/gitin/default.nix b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
index e2aaafea20243..3d429b7c561c5 100644
--- a/pkgs/applications/version-management/git-and-tools/gitin/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
index 6f5ce3358a3a3..1fa2ebc6f74a7 100644
--- a/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/gitweb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildEnv, git, fetchFromGitHub
+{ lib, buildEnv, git, fetchFromGitHub
 , gitwebTheme ? false }:
 
 let
diff --git a/pkgs/applications/version-management/git-and-tools/grv/default.nix b/pkgs/applications/version-management/git-and-tools/grv/default.nix
index 041034651894b..e43c602d6d91b 100644
--- a/pkgs/applications/version-management/git-and-tools/grv/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/grv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
+{ lib, buildGoPackage, fetchFromGitHub, curl, ncurses, pkg-config, readline
 , cmake }:
 let
   version = "0.3.2";
diff --git a/pkgs/applications/version-management/git-and-tools/hub/default.nix b/pkgs/applications/version-management/git-and-tools/hub/default.nix
index 4b189c55c8a84..e0d7e46d22a51 100644
--- a/pkgs/applications/version-management/git-and-tools/hub/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/hub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, git, groff, installShellFiles, util-linux, nixosTests }:
 
 buildGoPackage rec {
   pname = "hub";
diff --git a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
index ce7493088430d..18f2e5ad48712 100644
--- a/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/lefthook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 # Currently `buildGo114Module` is passed as `buildGoModule` from
 # `../default.nix`. Please remove the fixed 1.14 once a new release has been
diff --git a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
index 5feb71c793174..1821dba0f0068 100644
--- a/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/pass-git-helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
+{ lib, buildPythonApplication, fetchFromGitHub, pyxdg, pytest, pytest-mock }:
 
 buildPythonApplication rec {
   pname   = "pass-git-helper";
diff --git a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
index 69062d305b7a5..1e65834f51938 100644
--- a/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/scmpuff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "scmpuff";
diff --git a/pkgs/applications/version-management/git-and-tools/stgit/default.nix b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
index 3a37c798a0850..4ee92c1d5e6af 100644
--- a/pkgs/applications/version-management/git-and-tools/stgit/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/stgit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, git, installShellFiles }:
+{ lib, python3Packages, fetchFromGitHub, git, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "stgit";
diff --git a/pkgs/applications/version-management/git-crecord/default.nix b/pkgs/applications/version-management/git-crecord/default.nix
index 3b906e4dc2e00..5dc75ce4d7026 100644
--- a/pkgs/applications/version-management/git-crecord/default.nix
+++ b/pkgs/applications/version-management/git-crecord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-crecord";
diff --git a/pkgs/applications/version-management/git-lfs/1.nix b/pkgs/applications/version-management/git-lfs/1.nix
index 3c758908cd49e..f72f51907500b 100644
--- a/pkgs/applications/version-management/git-lfs/1.nix
+++ b/pkgs/applications/version-management/git-lfs/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-lfs";
diff --git a/pkgs/applications/version-management/git-up/default.nix b/pkgs/applications/version-management/git-up/default.nix
index 57a40de9d4a44..06a2bb48989ca 100644
--- a/pkgs/applications/version-management/git-up/default.nix
+++ b/pkgs/applications/version-management/git-up/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, git }:
+{ lib, fetchurl, pythonPackages, git }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "git-up";
diff --git a/pkgs/applications/version-management/gitea/default.nix b/pkgs/applications/version-management/gitea/default.nix
index 68b3a3e9099a6..f2d258ea1aff5 100644
--- a/pkgs/applications/version-management/gitea/default.nix
+++ b/pkgs/applications/version-management/gitea/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchurl, makeWrapper
+{ lib, buildGoPackage, fetchurl, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/gitinspector/default.nix b/pkgs/applications/version-management/gitinspector/default.nix
index 68dd3c190bec7..384f5d0f01f7c 100644
--- a/pkgs/applications/version-management/gitinspector/default.nix
+++ b/pkgs/applications/version-management/gitinspector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, python2Packages}:
+{ lib, fetchzip, python2Packages}:
 
 python2Packages.buildPythonApplication rec {
   pname = "gitinspector";
diff --git a/pkgs/applications/version-management/gitlab/gitaly/default.nix b/pkgs/applications/version-management/gitlab/gitaly/default.nix
index acfd91be331bd..d61c97f9bb1e7 100644
--- a/pkgs/applications/version-management/gitlab/gitaly/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitaly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
+{ lib, fetchFromGitLab, fetchFromGitHub, buildGoModule, ruby
 , bundlerEnv, pkg-config
 # libgit2 + dependencies
 , libgit2, openssl, zlib, pcre, http-parser }:
diff --git a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
index d1b5958c751df..a1a9df57f044c 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, buildGoModule, ruby }:
+{ lib, fetchFromGitLab, buildGoModule, ruby }:
 
 buildGoModule rec {
   pname = "gitlab-shell";
diff --git a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
index b38485716d7d3..883753616c99d 100644
--- a/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
+++ b/pkgs/applications/version-management/gitlab/gitlab-workhorse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, git, buildGoModule }:
+{ lib, fetchFromGitLab, git, buildGoModule }:
 
 buildGoModule rec {
   pname = "gitlab-workhorse";
diff --git a/pkgs/applications/version-management/gitless/default.nix b/pkgs/applications/version-management/gitless/default.nix
index e53da902e138e..310158e3eeae6 100644
--- a/pkgs/applications/version-management/gitless/default.nix
+++ b/pkgs/applications/version-management/gitless/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, python, lib, stdenv }:
+{ fetchFromGitHub, python, lib }:
 
 with python.pkgs;
 buildPythonApplication rec {
diff --git a/pkgs/applications/version-management/gogs/default.nix b/pkgs/applications/version-management/gogs/default.nix
index fed2fd9ea3380..c0b0021f8cbec 100644
--- a/pkgs/applications/version-management/gogs/default.nix
+++ b/pkgs/applications/version-management/gogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, makeWrapper
+{ lib, buildGoModule, fetchFromGitHub, makeWrapper
 , git, bash, gzip, openssh, pam
 , sqliteSupport ? true
 , pamSupport ? true
diff --git a/pkgs/applications/version-management/meld/default.nix b/pkgs/applications/version-management/meld/default.nix
index 4f94e2926c4a2..268098b2d2d0c 100644
--- a/pkgs/applications/version-management/meld/default.nix
+++ b/pkgs/applications/version-management/meld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , gettext
 , itstool
diff --git a/pkgs/applications/version-management/nitpick/default.nix b/pkgs/applications/version-management/nitpick/default.nix
index ba1f3bbb93b71..56d3531f72196 100644
--- a/pkgs/applications/version-management/nitpick/default.nix
+++ b/pkgs/applications/version-management/nitpick/default.nix
@@ -1,6 +1,6 @@
 { fetchFromGitHub
 , buildPythonPackage
-, lib, stdenv
+, lib
 , isPy27
 }:
 
diff --git a/pkgs/applications/version-management/peru/default.nix b/pkgs/applications/version-management/peru/default.nix
index d7ad9060879ec..b7b6d62e4b4cb 100644
--- a/pkgs/applications/version-management/peru/default.nix
+++ b/pkgs/applications/version-management/peru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "peru";
diff --git a/pkgs/applications/version-management/sourcehut/builds.nix b/pkgs/applications/version-management/sourcehut/builds.nix
index 200d1d5384fb2..3e89fe0a4dc2e 100644
--- a/pkgs/applications/version-management/sourcehut/builds.nix
+++ b/pkgs/applications/version-management/sourcehut/builds.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, redis, celery, pyyaml, markdown }:
diff --git a/pkgs/applications/version-management/sourcehut/core.nix b/pkgs/applications/version-management/sourcehut/core.nix
index bcc47920ebebc..69f8a7d4e458d 100644
--- a/pkgs/applications/version-management/sourcehut/core.nix
+++ b/pkgs/applications/version-management/sourcehut/core.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, fetchNodeModules, buildPythonPackage
+{ lib, fetchgit, fetchNodeModules, buildPythonPackage
 , pgpy, flask, bleach, humanize, html5lib, markdown, psycopg2, pygments
 , requests, sqlalchemy, cryptography, beautifulsoup4, sqlalchemy-utils, prometheus_client
 , celery, alembic, importlib-metadata, mistletoe
diff --git a/pkgs/applications/version-management/sourcehut/dispatch.nix b/pkgs/applications/version-management/sourcehut/dispatch.nix
index c7c11cafc8b4a..ea3f58e38906d 100644
--- a/pkgs/applications/version-management/sourcehut/dispatch.nix
+++ b/pkgs/applications/version-management/sourcehut/dispatch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml, PyGithub }:
 
diff --git a/pkgs/applications/version-management/sourcehut/git.nix b/pkgs/applications/version-management/sourcehut/git.nix
index 3ef49b796645e..8966cbe080018 100644
--- a/pkgs/applications/version-management/sourcehut/git.nix
+++ b/pkgs/applications/version-management/sourcehut/git.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , srht, minio, pygit2, scmsrht }:
diff --git a/pkgs/applications/version-management/sourcehut/hg.nix b/pkgs/applications/version-management/sourcehut/hg.nix
index d0e1409084694..fae311831f2fc 100644
--- a/pkgs/applications/version-management/sourcehut/hg.nix
+++ b/pkgs/applications/version-management/sourcehut/hg.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchhg, buildPythonPackage
+{ lib, fetchhg, buildPythonPackage
 , python
 , srht, hglib, scmsrht, unidiff }:
 
diff --git a/pkgs/applications/version-management/sourcehut/hub.nix b/pkgs/applications/version-management/sourcehut/hub.nix
index 8ea4961e7d453..99b5663a9b89a 100644
--- a/pkgs/applications/version-management/sourcehut/hub.nix
+++ b/pkgs/applications/version-management/sourcehut/hub.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht }:
 
diff --git a/pkgs/applications/version-management/sourcehut/lists.nix b/pkgs/applications/version-management/sourcehut/lists.nix
index a0b52a2d56408..25d22dede3595 100644
--- a/pkgs/applications/version-management/sourcehut/lists.nix
+++ b/pkgs/applications/version-management/sourcehut/lists.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, asyncpg, aiosmtpd, pygit2, emailthreads }:
 
diff --git a/pkgs/applications/version-management/sourcehut/man.nix b/pkgs/applications/version-management/sourcehut/man.nix
index 26939d2bebec9..24a31a3ef17fd 100644
--- a/pkgs/applications/version-management/sourcehut/man.nix
+++ b/pkgs/applications/version-management/sourcehut/man.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pygit2 }:
 
diff --git a/pkgs/applications/version-management/sourcehut/meta.nix b/pkgs/applications/version-management/sourcehut/meta.nix
index b6622d97487e3..d07bd29357acf 100644
--- a/pkgs/applications/version-management/sourcehut/meta.nix
+++ b/pkgs/applications/version-management/sourcehut/meta.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , buildGoModule
 , pgpy, srht, redis, bcrypt, qrcode, stripe, zxcvbn, alembic, pystache
diff --git a/pkgs/applications/version-management/sourcehut/paste.nix b/pkgs/applications/version-management/sourcehut/paste.nix
index eaec8b710dd68..12747f981032b 100644
--- a/pkgs/applications/version-management/sourcehut/paste.nix
+++ b/pkgs/applications/version-management/sourcehut/paste.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, pyyaml }:
 
diff --git a/pkgs/applications/version-management/sourcehut/scm.nix b/pkgs/applications/version-management/sourcehut/scm.nix
index 6e8b03835bc40..615716d03afd4 100644
--- a/pkgs/applications/version-management/sourcehut/scm.nix
+++ b/pkgs/applications/version-management/sourcehut/scm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , srht, redis, pyyaml, buildsrht
 , writeText }:
 
diff --git a/pkgs/applications/version-management/sourcehut/todo.nix b/pkgs/applications/version-management/sourcehut/todo.nix
index 357dcd4d2e2a1..85ae3b2cf1461 100644
--- a/pkgs/applications/version-management/sourcehut/todo.nix
+++ b/pkgs/applications/version-management/sourcehut/todo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, buildPythonPackage
+{ lib, fetchgit, buildPythonPackage
 , python
 , srht, redis, alembic, pystache
 , pytest, factory_boy, writeText }:
diff --git a/pkgs/applications/video/clipgrab/default.nix b/pkgs/applications/video/clipgrab/default.nix
index c1701dd51748a..6db2450d13653 100644
--- a/pkgs/applications/video/clipgrab/default.nix
+++ b/pkgs/applications/video/clipgrab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeDesktopItem, ffmpeg_3
+{ lib, fetchurl, makeDesktopItem, ffmpeg_3
 , qmake, qttools, mkDerivation
 , qtbase, qtdeclarative, qtlocation, qtquickcontrols2, qtwebchannel, qtwebengine
 }:
diff --git a/pkgs/applications/video/devede/default.nix b/pkgs/applications/video/devede/default.nix
index 4b1b7ae0b602c..6a4d0dc1b8df8 100644
--- a/pkgs/applications/video/devede/default.nix
+++ b/pkgs/applications/video/devede/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
+{ lib, fetchFromGitLab, python3Packages, ffmpeg_3, mplayer, vcdimager, cdrkit, dvdauthor
 , gtk3, gettext, wrapGAppsHook, gdk-pixbuf, gobject-introspection }:
 
 let
diff --git a/pkgs/applications/video/electronplayer/electronplayer.nix b/pkgs/applications/video/electronplayer/electronplayer.nix
index a4ebbf159b881..15f5b60a09a64 100644
--- a/pkgs/applications/video/electronplayer/electronplayer.nix
+++ b/pkgs/applications/video/electronplayer/electronplayer.nix
@@ -1,4 +1,4 @@
-{ appimageTools, lib, stdenv, fetchurl }:
+{ appimageTools, lib, fetchurl }:
 let
   pname = "electronplayer";
   version = "2.0.8";
diff --git a/pkgs/applications/video/jellyfin-mpv-shim/default.nix b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
index fe06e9431f9d3..6dc42a47685b7 100644
--- a/pkgs/applications/video/jellyfin-mpv-shim/default.nix
+++ b/pkgs/applications/video/jellyfin-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, callPackage
+{ lib, buildPythonApplication, fetchFromGitHub, callPackage
 , mpv, python-mpv-jsonipc, jellyfin-apiclient-python
 , pillow, tkinter, pystray, jinja2, pywebview }:
 
diff --git a/pkgs/applications/video/kazam/default.nix b/pkgs/applications/video/kazam/default.nix
index e6e971ad43873..35b7d173257fc 100644
--- a/pkgs/applications/video/kazam/default.nix
+++ b/pkgs/applications/video/kazam/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
+{ lib, fetchurl, substituteAll, python3, gst_all_1, wrapGAppsHook, gobject-introspection
 , gtk3, libwnck3, keybinder3, intltool, libcanberra-gtk3, libappindicator-gtk3, libpulseaudio
 , fetchpatch }:
 
diff --git a/pkgs/applications/video/kodi/wrapper.nix b/pkgs/applications/video/kodi/wrapper.nix
index 6bec8f9c8912e..80a36df3de745 100644
--- a/pkgs/applications/video/kodi/wrapper.nix
+++ b/pkgs/applications/video/kodi/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, makeWrapper, buildEnv, kodi, plugins }:
+{ lib, makeWrapper, buildEnv, kodi, plugins }:
 
 let
   drvName = builtins.parseDrvName kodi.name;
diff --git a/pkgs/applications/video/makemkv/default.nix b/pkgs/applications/video/makemkv/default.nix
index 29676abb755e3..cec6468c43be2 100644
--- a/pkgs/applications/video/makemkv/default.nix
+++ b/pkgs/applications/video/makemkv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , autoPatchelfHook
diff --git a/pkgs/applications/video/mythtv/default.nix b/pkgs/applications/video/mythtv/default.nix
index a58c32dc563e6..236aec2ee563d 100644
--- a/pkgs/applications/video/mythtv/default.nix
+++ b/pkgs/applications/video/mythtv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
+{ lib, mkDerivation, fetchFromGitHub, which, qtbase, qtwebkit, qtscript, xlibsWrapper
 , libpulseaudio, fftwSinglePrec , lame, zlib, libGLU, libGL, alsaLib, freetype
 , perl, pkg-config , libsamplerate, libbluray, lzo, libX11, libXv, libXrandr, libXvMC, libXinerama, libXxf86vm
 , libXmu , yasm, libuuid, taglib, libtool, autoconf, automake, file, exiv2, linuxHeaders
diff --git a/pkgs/applications/video/pitivi/default.nix b/pkgs/applications/video/pitivi/default.nix
index 1b2af7614ab0b..e388d5a67fe62 100644
--- a/pkgs/applications/video/pitivi/default.nix
+++ b/pkgs/applications/video/pitivi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchurl
 , pkg-config
diff --git a/pkgs/applications/video/plex-media-player/default.nix b/pkgs/applications/video/plex-media-player/default.nix
index e690c5070243e..e7a735f167c8d 100644
--- a/pkgs/applications/video/plex-media-player/default.nix
+++ b/pkgs/applications/video/plex-media-player/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
+{ lib, fetchFromGitHub, fetchurl, pkg-config, cmake, python3, mkDerivation
 , libX11, libXrandr, qtbase, qtwebchannel, qtwebengine, qtx11extras
 , libvdpau, SDL2, mpv, libGL }:
 let
diff --git a/pkgs/applications/video/plex-mpv-shim/default.nix b/pkgs/applications/video/plex-mpv-shim/default.nix
index 7738dd99d215a..d0904790a9e84 100644
--- a/pkgs/applications/video/plex-mpv-shim/default.nix
+++ b/pkgs/applications/video/plex-mpv-shim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
+{ lib, buildPythonApplication, fetchFromGitHub, mpv, requests, python-mpv-jsonipc }:
 
 buildPythonApplication rec {
   pname = "plex-mpv-shim";
diff --git a/pkgs/applications/video/pyca/default.nix b/pkgs/applications/video/pyca/default.nix
index bf54c0a2d6ccd..df42bbec156f2 100644
--- a/pkgs/applications/video/pyca/default.nix
+++ b/pkgs/applications/video/pyca/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
+{ lib, buildPythonApplication, fetchFromGitHub, pycurl, dateutil, configobj, sqlalchemy, sdnotify, flask }:
 
 buildPythonApplication rec {
   pname = "pyca";
diff --git a/pkgs/applications/video/qmediathekview/default.nix b/pkgs/applications/video/qmediathekview/default.nix
index b05fa113a30fe..d0f414135703e 100644
--- a/pkgs/applications/video/qmediathekview/default.nix
+++ b/pkgs/applications/video/qmediathekview/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
+{ mkDerivation, lib, fetchFromGitHub, qtbase, qttools, xz, boost, qmake, pkg-config }:
 
 mkDerivation rec {
   pname = "QMediathekView";
diff --git a/pkgs/applications/video/shotcut/default.nix b/pkgs/applications/video/shotcut/default.nix
index ade4b61931b20..d580d98a6c1d1 100644
--- a/pkgs/applications/video/shotcut/default.nix
+++ b/pkgs/applications/video/shotcut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , mkDerivation
diff --git a/pkgs/applications/video/tartube/default.nix b/pkgs/applications/video/tartube/default.nix
index 3bd48019d0dd0..12525da35c405 100644
--- a/pkgs/applications/video/tartube/default.nix
+++ b/pkgs/applications/video/tartube/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , gdk-pixbuf
 , gobject-introspection
diff --git a/pkgs/applications/video/vokoscreen/default.nix b/pkgs/applications/video/vokoscreen/default.nix
index 06e91218cacc1..598a162f39987 100644
--- a/pkgs/applications/video/vokoscreen/default.nix
+++ b/pkgs/applications/video/vokoscreen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation
+{ lib, fetchFromGitHub, mkDerivation
 , pkg-config, qtbase, qttools, qmake, qtmultimedia, qtx11extras, alsaLib, libv4l, libXrandr
 , ffmpeg
 }:
diff --git a/pkgs/applications/virtualization/aqemu/default.nix b/pkgs/applications/virtualization/aqemu/default.nix
index d31523e946ac9..2d865f4181874 100644
--- a/pkgs/applications/virtualization/aqemu/default.nix
+++ b/pkgs/applications/virtualization/aqemu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib, stdenv
+{ mkDerivation, cmake, fetchFromGitHub, libvncserver, qemu, qtbase, lib
 }:
 
 mkDerivation rec {
diff --git a/pkgs/applications/virtualization/cntr/default.nix b/pkgs/applications/virtualization/cntr/default.nix
index f7b7c99b5540a..2283b45aee477 100644
--- a/pkgs/applications/virtualization/cntr/default.nix
+++ b/pkgs/applications/virtualization/cntr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cntr";
diff --git a/pkgs/applications/virtualization/cri-o/default.nix b/pkgs/applications/virtualization/cri-o/default.nix
index 388cf328ff511..9950537150723 100644
--- a/pkgs/applications/virtualization/cri-o/default.nix
+++ b/pkgs/applications/virtualization/cri-o/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , btrfs-progs
 , buildGoModule
 , fetchFromGitHub
diff --git a/pkgs/applications/virtualization/docker-compose/default.nix b/pkgs/applications/virtualization/docker-compose/default.nix
index 3dabcf57daf31..e4e7a2049348f 100644
--- a/pkgs/applications/virtualization/docker-compose/default.nix
+++ b/pkgs/applications/virtualization/docker-compose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, pythonOlder
+{ lib, buildPythonApplication, fetchPypi, pythonOlder
 , installShellFiles
 , mock, pytest, nose
 , pyyaml, backports_ssl_match_hostname, colorama, docopt
diff --git a/pkgs/applications/virtualization/docker-slim/default.nix b/pkgs/applications/virtualization/docker-slim/default.nix
index 6c1ef95cd6f79..59c594268302c 100644
--- a/pkgs/applications/virtualization/docker-slim/default.nix
+++ b/pkgs/applications/virtualization/docker-slim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , makeWrapper
diff --git a/pkgs/applications/virtualization/docker/buildx.nix b/pkgs/applications/virtualization/docker/buildx.nix
index 9eb03508572db..84019395853b2 100644
--- a/pkgs/applications/virtualization/docker/buildx.nix
+++ b/pkgs/applications/virtualization/docker/buildx.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docker-buildx";
diff --git a/pkgs/applications/virtualization/docker/distribution.nix b/pkgs/applications/virtualization/docker/distribution.nix
index f41862c0dd15a..96722fe393f60 100644
--- a/pkgs/applications/virtualization/docker/distribution.nix
+++ b/pkgs/applications/virtualization/docker/distribution.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "distribution";
diff --git a/pkgs/applications/virtualization/docker/proxy.nix b/pkgs/applications/virtualization/docker/proxy.nix
index 7fd7cda81e236..59fc80eefbf77 100644
--- a/pkgs/applications/virtualization/docker/proxy.nix
+++ b/pkgs/applications/virtualization/docker/proxy.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "docker-proxy-${rev}";
diff --git a/pkgs/applications/virtualization/ecs-agent/default.nix b/pkgs/applications/virtualization/ecs-agent/default.nix
index 41a0931533310..390f3049c0266 100644
--- a/pkgs/applications/virtualization/ecs-agent/default.nix
+++ b/pkgs/applications/virtualization/ecs-agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname   = "amazon-ecs-agent";
diff --git a/pkgs/applications/virtualization/firectl/default.nix b/pkgs/applications/virtualization/firectl/default.nix
index 0b5fc5dac52b1..ac531b36dd21a 100644
--- a/pkgs/applications/virtualization/firectl/default.nix
+++ b/pkgs/applications/virtualization/firectl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "firectl";
diff --git a/pkgs/applications/virtualization/gvisor/default.nix b/pkgs/applications/virtualization/gvisor/default.nix
index 2d423911c99bf..fd001d598ad48 100644
--- a/pkgs/applications/virtualization/gvisor/default.nix
+++ b/pkgs/applications/virtualization/gvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildBazelPackage
 , fetchFromGitHub
 , cacert
diff --git a/pkgs/applications/virtualization/qtemu/default.nix b/pkgs/applications/virtualization/qtemu/default.nix
index 00dffc385a104..3a5f26bfcc8d3 100644
--- a/pkgs/applications/virtualization/qtemu/default.nix
+++ b/pkgs/applications/virtualization/qtemu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
+{ lib, mkDerivation, fetchFromGitLab, pkg-config, qmake, qtbase, qemu, makeWrapper }:
 
 mkDerivation rec {
   pname = "qtemu";
diff --git a/pkgs/applications/virtualization/singularity/default.nix b/pkgs/applications/virtualization/singularity/default.nix
index 6961dcf7b8939..24b71b4616533 100644
--- a/pkgs/applications/virtualization/singularity/default.nix
+++ b/pkgs/applications/virtualization/singularity/default.nix
@@ -1,5 +1,4 @@
-{stdenv
-, lib
+{ lib
 , fetchurl
 , util-linux
 , gpgme
diff --git a/pkgs/applications/virtualization/virt-manager/default.nix b/pkgs/applications/virtualization/virt-manager/default.nix
index 8fe9caf0e570f..11ddaff8d3be4 100644
--- a/pkgs/applications/virtualization/virt-manager/default.nix
+++ b/pkgs/applications/virtualization/virt-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, intltool, file
+{ lib, fetchurl, python3Packages, intltool, file
 , wrapGAppsHook, gtk-vnc, vte, avahi, dconf
 , gobject-introspection, libvirt-glib, system-libvirt
 , gsettings-desktop-schemas, glib, libosinfo, gnome3
diff --git a/pkgs/applications/virtualization/xen/4.10.nix b/pkgs/applications/virtualization/xen/4.10.nix
index 2f9882dee9b3c..bc9003e128a43 100644
--- a/pkgs/applications/virtualization/xen/4.10.nix
+++ b/pkgs/applications/virtualization/xen/4.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, fetchpatch, fetchgit
+{ lib, callPackage, fetchurl, fetchpatch, fetchgit
 , ocaml-ng
 , withInternalQemu ? true
 , withInternalTraditionalQemu ? true
diff --git a/pkgs/applications/virtualization/xen/packages.nix b/pkgs/applications/virtualization/xen/packages.nix
index 55e3b12c3b7e2..5ff263dc8ff20 100644
--- a/pkgs/applications/virtualization/xen/packages.nix
+++ b/pkgs/applications/virtualization/xen/packages.nix
@@ -1,5 +1,5 @@
 { callPackage
-, stdenv
+
 }:
 
 # TODO(@oxij) on new Xen version: generalize this to generate [vanilla slim
diff --git a/pkgs/applications/window-managers/btops/default.nix b/pkgs/applications/window-managers/btops/default.nix
index f0bb26f43e259..5f107337ee448 100644
--- a/pkgs/applications/window-managers/btops/default.nix
+++ b/pkgs/applications/window-managers/btops/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "btops";
diff --git a/pkgs/applications/window-managers/dwm/dwm-status.nix b/pkgs/applications/window-managers/dwm/dwm-status.nix
index 1724a2c9824ca..d419b0ebe3a83 100644
--- a/pkgs/applications/window-managers/dwm/dwm-status.nix
+++ b/pkgs/applications/window-managers/dwm/dwm-status.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
+{ lib, rustPlatform, fetchFromGitHub, dbus, gdk-pixbuf, libnotify, makeWrapper, pkg-config, xorg
 , enableAlsaUtils ? true, alsaUtils, coreutils
 , enableNetwork ? true, dnsutils, iproute, wirelesstools }:
 
diff --git a/pkgs/applications/window-managers/i3/gaps.nix b/pkgs/applications/window-managers/i3/gaps.nix
index 52322d8e19485..1a11d40e3df77 100644
--- a/pkgs/applications/window-managers/i3/gaps.nix
+++ b/pkgs/applications/window-managers/i3/gaps.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, i3, autoreconfHook }:
+{ fetchurl, lib, i3, autoreconfHook }:
 
 i3.overrideAttrs (oldAttrs : rec {
 
diff --git a/pkgs/applications/window-managers/i3/pystatus.nix b/pkgs/applications/window-managers/i3/pystatus.nix
index 404e7b41f556e..bddaab6157831 100644
--- a/pkgs/applications/window-managers/i3/pystatus.nix
+++ b/pkgs/applications/window-managers/i3/pystatus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , libpulseaudio
 , libnotify
diff --git a/pkgs/applications/window-managers/i3/status-rust.nix b/pkgs/applications/window-managers/i3/status-rust.nix
index b9dbe6136b407..be7e88a250199 100644
--- a/pkgs/applications/window-managers/i3/status-rust.nix
+++ b/pkgs/applications/window-managers/i3/status-rust.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , pkg-config
diff --git a/pkgs/applications/window-managers/i3/wk-switch.nix b/pkgs/applications/window-managers/i3/wk-switch.nix
index e7fd87aaf3b8e..d0055ef63653e 100644
--- a/pkgs/applications/window-managers/i3/wk-switch.nix
+++ b/pkgs/applications/window-managers/i3/wk-switch.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "i3-wk-switch";
diff --git a/pkgs/applications/window-managers/i3/wmfocus.nix b/pkgs/applications/window-managers/i3/wmfocus.nix
index db6ec29d9e988..9169cfc3817ca 100644
--- a/pkgs/applications/window-managers/i3/wmfocus.nix
+++ b/pkgs/applications/window-managers/i3/wmfocus.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform
+{ lib, fetchFromGitHub, rustPlatform
 , xorg, python3, pkg-config, cairo, libxkbcommon }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/applications/window-managers/leftwm/default.nix b/pkgs/applications/window-managers/leftwm/default.nix
index 712e9ab22c77b..cdef71c965e93 100644
--- a/pkgs/applications/window-managers/leftwm/default.nix
+++ b/pkgs/applications/window-managers/leftwm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
+{ lib, fetchFromGitHub, rustPlatform, libX11, libXinerama, makeWrapper }:
 
 let
     rpath = lib.makeLibraryPath [ libXinerama libX11 ];
diff --git a/pkgs/applications/window-managers/qtile/default.nix b/pkgs/applications/window-managers/qtile/default.nix
index 709a5b147362d..21059c25afb18 100644
--- a/pkgs/applications/window-managers/qtile/default.nix
+++ b/pkgs/applications/window-managers/qtile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
+{ lib, fetchFromGitHub, python37Packages, glib, cairo, pango, pkg-config, libxcb, xcbutilcursor }:
 
 let cairocffi-xcffib = python37Packages.cairocffi.override {
     withXcffib = true;
diff --git a/pkgs/applications/window-managers/sway/wrapper.nix b/pkgs/applications/window-managers/sway/wrapper.nix
index 0a80ce70e0321..319023eb2e5a5 100644
--- a/pkgs/applications/window-managers/sway/wrapper.nix
+++ b/pkgs/applications/window-managers/sway/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , sway-unwrapped
 , makeWrapper, symlinkJoin, writeShellScriptBin
 , withBaseWrapper ? true, extraSessionCommands ? "", dbus
diff --git a/pkgs/build-support/appimage/default.nix b/pkgs/build-support/appimage/default.nix
index 170c25dffe2d6..1613e9dea24bc 100644
--- a/pkgs/build-support/appimage/default.nix
+++ b/pkgs/build-support/appimage/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , bash
 , binutils-unwrapped
 , coreutils
diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
index b40569a479bc1..9a9e5a9ce10a4 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, callPackage, runCommandLocal, writeShellScriptBin, stdenv, coreutils, bubblewrap }:
+{ lib, callPackage, runCommandLocal, writeShellScriptBin, coreutils, bubblewrap }:
 
 args @ {
   name
diff --git a/pkgs/build-support/emacs/trivial.nix b/pkgs/build-support/emacs/trivial.nix
index 396c971b2f016..9a36b44a270da 100644
--- a/pkgs/build-support/emacs/trivial.nix
+++ b/pkgs/build-support/emacs/trivial.nix
@@ -1,6 +1,6 @@
 # trivial builder for Emacs packages
 
-{ lib, stdenv, texinfo, ... }@envargs:
+{ lib, texinfo, ... }@envargs:
 
 with lib;
 
diff --git a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
index 9fd813bfa575a..e8b2403d8f338 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerConfig.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
index 869ba637429cd..0fbbc078efc3e 100644
--- a/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
+++ b/pkgs/build-support/fetchdocker/fetchDockerLayer.nix
@@ -1,4 +1,4 @@
-pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
+pkgargs@{ lib, haskellPackages, writeText, gawk }:
 let
   generic-fetcher =
     import ./generic-fetcher.nix pkgargs;
diff --git a/pkgs/build-support/plugins.nix b/pkgs/build-support/plugins.nix
index 1ed7485159711..31b478c6c0dee 100644
--- a/pkgs/build-support/plugins.nix
+++ b/pkgs/build-support/plugins.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv }:
+{ lib }:
 # helper functions for packaging programs with plugin systems
 {
 
diff --git a/pkgs/common-updater/unstable-updater.nix b/pkgs/common-updater/unstable-updater.nix
index 94cd33b9a26b9..d315c1027ab46 100644
--- a/pkgs/common-updater/unstable-updater.nix
+++ b/pkgs/common-updater/unstable-updater.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, writeShellScript
+{ writeShellScript
 , coreutils
 , git
 , nix
diff --git a/pkgs/data/documentation/zeal/default.nix b/pkgs/data/documentation/zeal/default.nix
index a6c0b1f491853..8c806b87d4b22 100644
--- a/pkgs/data/documentation/zeal/default.nix
+++ b/pkgs/data/documentation/zeal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
+{ lib, fetchFromGitHub, cmake, extra-cmake-modules, pkg-config
 , qtbase, qtimageformats, qtwebengine, qtx11extras, mkDerivation
 , libarchive, libXdmcp, libpthreadstubs, xcbutilkeysyms  }:
 
diff --git a/pkgs/data/fonts/et-book/default.nix b/pkgs/data/fonts/et-book/default.nix
index e7d97b777076e..c410826b2fb5d 100644
--- a/pkgs/data/fonts/et-book/default.nix
+++ b/pkgs/data/fonts/et-book/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub }:
+{ lib, fetchFromGitHub }:
 
 fetchFromGitHub rec {
   rev = "7e8f02dadcc23ba42b491b39e5bdf16e7b383031";
diff --git a/pkgs/data/fonts/fira-code/default.nix b/pkgs/data/fonts/fira-code/default.nix
index 546c7d905a7ba..d5c5d0e000a5f 100644
--- a/pkgs/data/fonts/fira-code/default.nix
+++ b/pkgs/data/fonts/fira-code/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "5.2";
diff --git a/pkgs/data/fonts/fira-code/symbols.nix b/pkgs/data/fonts/fira-code/symbols.nix
index 2e4cfc8f05b6c..e226c351a333c 100644
--- a/pkgs/data/fonts/fira-code/symbols.nix
+++ b/pkgs/data/fonts/fira-code/symbols.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-code-symbols-20160811";
diff --git a/pkgs/data/fonts/fira-mono/default.nix b/pkgs/data/fonts/fira-mono/default.nix
index 37f285b55527c..2aef2fc4b05f6 100644
--- a/pkgs/data/fonts/fira-mono/default.nix
+++ b/pkgs/data/fonts/fira-mono/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "fira-mono-3.206";
diff --git a/pkgs/data/fonts/fixedsys-excelsior/default.nix b/pkgs/data/fonts/fixedsys-excelsior/default.nix
index e55ae0bcf11b5..8bdbc2d4c4f06 100644
--- a/pkgs/data/fonts/fixedsys-excelsior/default.nix
+++ b/pkgs/data/fonts/fixedsys-excelsior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl } :
+{ lib, fetchurl } :
 
 let
   major = "3";
diff --git a/pkgs/data/fonts/go-font/default.nix b/pkgs/data/fonts/go-font/default.nix
index 056cd621394f3..ed17dfc9054c8 100644
--- a/pkgs/data/fonts/go-font/default.nix
+++ b/pkgs/data/fonts/go-font/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit }:
+{ lib, fetchgit }:
 
 let
   version = "2017-03-30";
diff --git a/pkgs/data/fonts/jost/default.nix b/pkgs/data/fonts/jost/default.nix
index a8df441d9990e..457cb0d03c99d 100644
--- a/pkgs/data/fonts/jost/default.nix
+++ b/pkgs/data/fonts/jost/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchzip}:
+{lib, fetchzip}:
 
 let
   version = "3.5";
diff --git a/pkgs/data/fonts/paratype-pt/mono.nix b/pkgs/data/fonts/paratype-pt/mono.nix
index eecab47c08790..6b1cd370241b2 100644
--- a/pkgs/data/fonts/paratype-pt/mono.nix
+++ b/pkgs/data/fonts/paratype-pt/mono.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-mono";
diff --git a/pkgs/data/fonts/paratype-pt/sans.nix b/pkgs/data/fonts/paratype-pt/sans.nix
index 826b8887365ef..d6b783ebe4c77 100644
--- a/pkgs/data/fonts/paratype-pt/sans.nix
+++ b/pkgs/data/fonts/paratype-pt/sans.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-sans";
diff --git a/pkgs/data/fonts/paratype-pt/serif.nix b/pkgs/data/fonts/paratype-pt/serif.nix
index bbff974e10712..2b5eeafd09b9b 100644
--- a/pkgs/data/fonts/paratype-pt/serif.nix
+++ b/pkgs/data/fonts/paratype-pt/serif.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   name = "paratype-pt-serif";
diff --git a/pkgs/data/fonts/ttf-bitstream-vera/default.nix b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
index bcf6cefb8d670..95e4ce2a52ab1 100644
--- a/pkgs/data/fonts/ttf-bitstream-vera/default.nix
+++ b/pkgs/data/fonts/ttf-bitstream-vera/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   pname = "ttf-bitstream-vera";
   version = "1.10";
diff --git a/pkgs/data/fonts/ttf-tw-moe/default.nix b/pkgs/data/fonts/ttf-tw-moe/default.nix
index 6957928944269..bf52d07c52e98 100644
--- a/pkgs/data/fonts/ttf-tw-moe/default.nix
+++ b/pkgs/data/fonts/ttf-tw-moe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 let
   version = "2020-11-14";
 in
diff --git a/pkgs/data/fonts/vista-fonts/default.nix b/pkgs/data/fonts/vista-fonts/default.nix
index b71ef7c99ec81..20b5b673ccff7 100644
--- a/pkgs/data/fonts/vista-fonts/default.nix
+++ b/pkgs/data/fonts/vista-fonts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, cabextract }:
+{ lib, fetchzip, cabextract }:
 
 fetchzip {
   name = "vista-fonts-1";
diff --git a/pkgs/data/misc/iana-etc/default.nix b/pkgs/data/misc/iana-etc/default.nix
index 1936bd6627a7a..421054fa17f0d 100644
--- a/pkgs/data/misc/iana-etc/default.nix
+++ b/pkgs/data/misc/iana-etc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "20200729";
diff --git a/pkgs/data/misc/mime-types/default.nix b/pkgs/data/misc/mime-types/default.nix
index dc942868250d9..77b67e48f923f 100644
--- a/pkgs/data/misc/mime-types/default.nix
+++ b/pkgs/data/misc/mime-types/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   version = "9";
diff --git a/pkgs/data/misc/unicode-emoji/default.nix b/pkgs/data/misc/unicode-emoji/default.nix
index 60ff492330dcc..b91afb08f60e0 100644
--- a/pkgs/data/misc/unicode-emoji/default.nix
+++ b/pkgs/data/misc/unicode-emoji/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , fetchurl
 , symlinkJoin
-, lib
 }:
 
 let
diff --git a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
index 26d9be6d904f7..832a534e5daa2 100644
--- a/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
+++ b/pkgs/desktops/cinnamon/cinnamon-gsettings-overrides/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , nixos-artwork
 , glib
diff --git a/pkgs/desktops/cinnamon/warpinator/default.nix b/pkgs/desktops/cinnamon/warpinator/default.nix
index 2338c834d1f85..efcd20457b328 100644
--- a/pkgs/desktops/cinnamon/warpinator/default.nix
+++ b/pkgs/desktops/cinnamon/warpinator/default.nix
@@ -1,5 +1,5 @@
 { fetchFromGitHub
-, lib, stdenv
+, lib
 , gobject-introspection
 , meson
 , ninja
diff --git a/pkgs/desktops/gnome-3/apps/accerciser/default.nix b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
index 550f3f31d0bde..2f8163adc7289 100644
--- a/pkgs/desktops/gnome-3/apps/accerciser/default.nix
+++ b/pkgs/desktops/gnome-3/apps/accerciser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , pkg-config
 , gnome3
diff --git a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
index fc0ee5d38ffa8..be456071e41d5 100644
--- a/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
+++ b/pkgs/desktops/gnome-3/apps/gnome-music/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , meson
 , ninja
 , gettext
diff --git a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
index 26d7593038be2..2b84442620db1 100644
--- a/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
+++ b/pkgs/desktops/gnome-3/core/gnome-tour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , gettext
 , meson
diff --git a/pkgs/desktops/lumina/lumina-calculator/default.nix b/pkgs/desktops/lumina/lumina-calculator/default.nix
index 05d80997b768a..d0f09bbfae237 100644
--- a/pkgs/desktops/lumina/lumina-calculator/default.nix
+++ b/pkgs/desktops/lumina/lumina-calculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "lumina-calculator";
diff --git a/pkgs/desktops/lumina/lumina-pdf/default.nix b/pkgs/desktops/lumina/lumina-pdf/default.nix
index 8d975c749d66b..679dfa65b5a78 100644
--- a/pkgs/desktops/lumina/lumina-pdf/default.nix
+++ b/pkgs/desktops/lumina/lumina-pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtbase, qttools, poppler }:
 
 mkDerivation rec {
   pname = "lumina-pdf";
diff --git a/pkgs/desktops/lumina/lumina/default.nix b/pkgs/desktops/lumina/lumina/default.nix
index 4daaf15534c1f..d31f16e235ad9 100644
--- a/pkgs/desktops/lumina/lumina/default.nix
+++ b/pkgs/desktops/lumina/lumina/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , fluxbox
diff --git a/pkgs/desktops/mate/mate-tweak/default.nix b/pkgs/desktops/mate/mate-tweak/default.nix
index 316a72a09c7f2..ce97bc416e695 100644
--- a/pkgs/desktops/mate/mate-tweak/default.nix
+++ b/pkgs/desktops/mate/mate-tweak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , intltool
diff --git a/pkgs/desktops/mate/mozo/default.nix b/pkgs/desktops/mate/mozo/default.nix
index cee4261a77dc1..4d893cd2e741b 100644
--- a/pkgs/desktops/mate/mozo/default.nix
+++ b/pkgs/desktops/mate/mozo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
+{ lib, python3, fetchurl, pkg-config, gettext, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "mozo";
diff --git a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
index 40ac23ca7f1fc..bfe95e0be46db 100644
--- a/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
+++ b/pkgs/desktops/pantheon/desktop/elementary-gsettings-schemas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , runCommand
 , mutter
 , elementary-default-settings
diff --git a/pkgs/desktops/xfce/applications/catfish/default.nix b/pkgs/desktops/xfce/applications/catfish/default.nix
index 85f823221b747..e47f1dea3f636 100644
--- a/pkgs/desktops/xfce/applications/catfish/default.nix
+++ b/pkgs/desktops/xfce/applications/catfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, file, which, intltool, gobject-introspection,
+{ lib, fetchurl, file, which, intltool, gobject-introspection,
   findutils, xdg_utils, dconf, gtk3, python3Packages,
   wrapGAppsHook
 }:
diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
index aa14c878b12af..304b9d9076db8 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-datetime-plugin/default.nix
@@ -1,5 +1,5 @@
 { mkXfceDerivation
-, lib, stdenv
+, lib
 , intltool
 , libxfce4ui
 , xfce4-panel
diff --git a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
index 985b067a02fb2..c46b5a0fd1b7d 100644
--- a/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
+++ b/pkgs/desktops/xfce/thunar-plugins/archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkXfceDerivation
 , gtk3
 , thunar
diff --git a/pkgs/development/arduino/ino/default.nix b/pkgs/development/arduino/ino/default.nix
index c536ed8c2c029..822cfb0e361ac 100644
--- a/pkgs/development/arduino/ino/default.nix
+++ b/pkgs/development/arduino/ino/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, python2Packages, picocom
+{ lib, fetchurl, python2Packages, picocom
 , avrdude, arduino-core }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/beam-modules/build-hex.nix b/pkgs/development/beam-modules/build-hex.nix
index e0d9dfc428898..1ebe3760ec8d4 100644
--- a/pkgs/development/beam-modules/build-hex.nix
+++ b/pkgs/development/beam-modules/build-hex.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildRebar3, fetchHex }:
+{ lib, buildRebar3, fetchHex }:
 
 { name, version, sha256
 , builder ? buildRebar3
diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index 4f312129b387b..570155e4d1a83 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, erlang }:
+{ lib, pkgs, erlang }:
 
 let
   inherit (lib) makeExtensible;
diff --git a/pkgs/development/beam-modules/lib.nix b/pkgs/development/beam-modules/lib.nix
index 7ae2e0e26066b..1b021cf934722 100644
--- a/pkgs/development/beam-modules/lib.nix
+++ b/pkgs/development/beam-modules/lib.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv }:
+{ pkgs, lib }:
 
 rec {
 
diff --git a/pkgs/development/compilers/carp/default.nix b/pkgs/development/compilers/carp/default.nix
index 0299c17977559..b0a14534b082f 100644
--- a/pkgs/development/compilers/carp/default.nix
+++ b/pkgs/development/compilers/carp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
+{ lib, fetchFromGitHub, makeWrapper, clang, haskellPackages }:
 
 haskellPackages.mkDerivation rec {
 
diff --git a/pkgs/development/compilers/chicken/4/egg2nix.nix b/pkgs/development/compilers/chicken/4/egg2nix.nix
index 2775666f14c3d..d2f2805ed7ff4 100644
--- a/pkgs/development/compilers/chicken/4/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/4/egg2nix.nix
@@ -1,4 +1,4 @@
-{ stdenv, eggDerivation, fetchurl, chickenEggs }:
+{ eggDerivation, fetchurl, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/4/eggs.nix b/pkgs/development/compilers/chicken/4/eggs.nix
index 6e6f104f8a0c0..8c96caca26236 100644
--- a/pkgs/development/compilers/chicken/4/eggs.nix
+++ b/pkgs/development/compilers/chicken/4/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/chicken/5/egg2nix.nix b/pkgs/development/compilers/chicken/5/egg2nix.nix
index 69e8d9e62c351..62b634eb63706 100644
--- a/pkgs/development/compilers/chicken/5/egg2nix.nix
+++ b/pkgs/development/compilers/chicken/5/egg2nix.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, eggDerivation, fetchFromGitHub, chickenEggs }:
+{ lib, eggDerivation, fetchFromGitHub, chickenEggs }:
 
 # Note: This mostly reimplements the default.nix already contained in
 # the tarball. Is there a nicer way than duplicating code?
diff --git a/pkgs/development/compilers/chicken/5/eggs.nix b/pkgs/development/compilers/chicken/5/eggs.nix
index 3c4ae74c1e660..1c1377350d214 100644
--- a/pkgs/development/compilers/chicken/5/eggs.nix
+++ b/pkgs/development/compilers/chicken/5/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/elm/packages/elm-format.nix b/pkgs/development/compilers/elm/packages/elm-format.nix
index 71386e00ef117..b2f655d4f1c57 100644
--- a/pkgs/development/compilers/elm/packages/elm-format.nix
+++ b/pkgs/development/compilers/elm/packages/elm-format.nix
@@ -1,7 +1,7 @@
 { mkDerivation, fetchgit, ansi-terminal, ansi-wl-pprint, array, base, binary
 , bytestring, cmark, containers, directory, filepath, free, HUnit
 , indents, json, mtl, optparse-applicative, parsec, process
-, QuickCheck, quickcheck-io, split, lib, stdenv, tasty, tasty-golden
+, QuickCheck, quickcheck-io, split, lib, tasty, tasty-golden
 , tasty-hunit, tasty-quickcheck, text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm-instrument.nix b/pkgs/development/compilers/elm/packages/elm-instrument.nix
index cd13eb4de4f11..cf0ba2303e10d 100644
--- a/pkgs/development/compilers/elm/packages/elm-instrument.nix
+++ b/pkgs/development/compilers/elm/packages/elm-instrument.nix
@@ -2,7 +2,7 @@
 , bytestring, Cabal, cmark, containers, directory, elm-format
 , fetchgit, filepath, free, HUnit, indents, json, mtl
 , optparse-applicative, parsec, process, QuickCheck, quickcheck-io
-, split, lib, stdenv, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
+, split, lib, tasty, tasty-golden, tasty-hunit, tasty-quickcheck
 , text
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elm.nix b/pkgs/development/compilers/elm/packages/elm.nix
index edb2ed6ed7a24..c012d59d8ae31 100644
--- a/pkgs/development/compilers/elm/packages/elm.nix
+++ b/pkgs/development/compilers/elm/packages/elm.nix
@@ -3,7 +3,7 @@
 , file-embed, filelock, filepath, ghc-prim, haskeline, HTTP
 , http-client, http-client-tls, http-types, language-glsl, mtl
 , network, parsec, process, raw-strings-qq, scientific, SHA
-, snap-core, snap-server, lib, stdenv, template-haskell, time
+, snap-core, snap-server, lib, template-haskell, time
 , unordered-containers, utf8-string, vector, zip-archive
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/elmi-to-json.nix b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
index 6788fce6a990e..3362ce5cc7a7e 100644
--- a/pkgs/development/compilers/elm/packages/elmi-to-json.nix
+++ b/pkgs/development/compilers/elm/packages/elmi-to-json.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, binary, bytestring, containers
 , directory, fetchgit, filepath, ghc-prim, hpack
-, optparse-applicative, lib, stdenv, text, unliftio
+, optparse-applicative, lib, text, unliftio
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/compilers/elm/packages/indents.nix b/pkgs/development/compilers/elm/packages/indents.nix
index 80f3c08d9e332..d196e8d0fbf64 100644
--- a/pkgs/development/compilers/elm/packages/indents.nix
+++ b/pkgs/development/compilers/elm/packages/indents.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, base, concatenative, mtl, parsec, lib, stdenv }:
+{ mkDerivation, base, concatenative, mtl, parsec, lib }:
 mkDerivation {
   pname = "indents";
   version = "0.3.3";
diff --git a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
index 82c37bd861774..54a60b50372ef 100644
--- a/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
+++ b/pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix
@@ -1,7 +1,7 @@
 { mkDerivation, aeson, array, attoparsec, base, binary, bytestring
 , containers, deepseq, directory, dlist, fetchgit, ghc-prim
 , ghcjs-prim, hashable, HUnit, integer-gmp, primitive, QuickCheck
-, quickcheck-unicode, random, scientific, stdenv, test-framework
+, quickcheck-unicode, random, scientific, test-framework
 , test-framework-hunit, test-framework-quickcheck2, text, time
 , transformers, unordered-containers, vector
 }:
diff --git a/pkgs/development/compilers/ios-cross-compile/9.2.nix b/pkgs/development/compilers/ios-cross-compile/9.2.nix
index cabdbd9dcc01c..688ca15177a84 100644
--- a/pkgs/development/compilers/ios-cross-compile/9.2.nix
+++ b/pkgs/development/compilers/ios-cross-compile/9.2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, clang,
+{ lib, git, clang,
   fetchFromGitHub, requireFile,
   openssl, xz, gnutar,
   automake, autoconf, libtool, clangStdenv } :
diff --git a/pkgs/development/compilers/jetbrains-jdk/default.nix b/pkgs/development/compilers/jetbrains-jdk/default.nix
index 2edf93b7fc024..3b5465ac9c3e3 100644
--- a/pkgs/development/compilers/jetbrains-jdk/default.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, openjdk11, fetchFromGitHub, jetbrains }:
+{ lib, openjdk11, fetchFromGitHub, jetbrains }:
 
 openjdk11.overrideAttrs (oldAttrs: rec {
   pname = "jetbrains-jdk";
diff --git a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
index 34d8f98970e0e..454156c2d2805 100644
--- a/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
+++ b/pkgs/development/compilers/meta-environment/meta-build-env/default.nix
@@ -1,4 +1,6 @@
-{lib, stdenv, fetchurl}: stdenv.mkDerivation {
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation {
   name = "meta-build-env-0.1";
   src = fetchurl {
     url = "http://www.meta-environment.org/releases/meta-build-env-0.1.tar.gz";
diff --git a/pkgs/development/compilers/osl/default.nix b/pkgs/development/compilers/osl/default.nix
index d3de5cad2f694..1006764481310 100644
--- a/pkgs/development/compilers/osl/default.nix
+++ b/pkgs/development/compilers/osl/default.nix
@@ -1,4 +1,4 @@
-{ clangStdenv, lib, stdenv, fetchFromGitHub, cmake, zlib, openexr,
+{ clangStdenv, lib, fetchFromGitHub, cmake, zlib, openexr,
 openimageio, llvm, boost165, flex, bison, partio, pugixml,
 util-linux, python
 }:
diff --git a/pkgs/development/compilers/pakcs/curry-base.nix b/pkgs/development/compilers/pakcs/curry-base.nix
index 660a4f2de40be..c461d2caa93c3 100644
--- a/pkgs/development/compilers/pakcs/curry-base.nix
+++ b/pkgs/development/compilers/pakcs/curry-base.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, Cabal, containers, directory, extra, filepath
-, mtl, parsec, pretty, lib, stdenv, time, transformers
+, mtl, parsec, pretty, lib, time, transformers
 }:
 mkDerivation {
   pname = "curry-base";
diff --git a/pkgs/development/compilers/pakcs/curry-frontend.nix b/pkgs/development/compilers/pakcs/curry-frontend.nix
index 8fd1645ee704c..88e88487594bb 100644
--- a/pkgs/development/compilers/pakcs/curry-frontend.nix
+++ b/pkgs/development/compilers/pakcs/curry-frontend.nix
@@ -1,6 +1,6 @@
 { mkDerivation, base, bytestring, Cabal, containers, curry-base
 , directory, extra, file-embed, filepath, mtl, network-uri, pretty
-, process, set-extra, lib, stdenv, template-haskell, transformers
+, process, set-extra, lib, template-haskell, transformers
 }:
 mkDerivation {
   pname = "curry-frontend";
diff --git a/pkgs/development/compilers/vyper/default.nix b/pkgs/development/compilers/vyper/default.nix
index 79702c01bee3c..81ee04edf088f 100644
--- a/pkgs/development/compilers/vyper/default.nix
+++ b/pkgs/development/compilers/vyper/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, writeText, asttokens
+{ lib, buildPythonPackage, fetchPypi, writeText, asttokens
 , pycryptodome, pytest_xdist, pytestcov, recommonmark, semantic-version, sphinx
 , sphinx_rtd_theme, pytestrunner }:
 
diff --git a/pkgs/development/idris-modules/tfrandom.nix b/pkgs/development/idris-modules/tfrandom.nix
index 5c63195031230..8249259075c00 100644
--- a/pkgs/development/idris-modules/tfrandom.nix
+++ b/pkgs/development/idris-modules/tfrandom.nix
@@ -1,8 +1,8 @@
-{ stdenv
+{ lib
 , build-idris-package
 , fetchFromGitHub
-, lib
 }:
+
 build-idris-package  {
   name = "tf-random";
   version = "2020-01-15";
diff --git a/pkgs/development/idris-modules/with-packages.nix b/pkgs/development/idris-modules/with-packages.nix
index 72b9067b6915d..080cbe2778a6c 100644
--- a/pkgs/development/idris-modules/with-packages.nix
+++ b/pkgs/development/idris-modules/with-packages.nix
@@ -1,6 +1,6 @@
 # Build a version of idris with a set of packages visible
 # packages: The packages visible to idris
-{ stdenv, lib, idris, symlinkJoin, makeWrapper }: packages:
+{ lib, idris, symlinkJoin, makeWrapper }: packages:
 
 let paths = lib.closePropagation packages;
 in
diff --git a/pkgs/development/interpreters/hy/default.nix b/pkgs/development/interpreters/hy/default.nix
index 6bfef26b4ddc7..e39bf915cfcf7 100644
--- a/pkgs/development/interpreters/hy/default.nix
+++ b/pkgs/development/interpreters/hy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "hy";
diff --git a/pkgs/development/interpreters/joker/default.nix b/pkgs/development/interpreters/joker/default.nix
index 3d36dde8e0f9c..004d2732f3a63 100644
--- a/pkgs/development/interpreters/joker/default.nix
+++ b/pkgs/development/interpreters/joker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "joker";
diff --git a/pkgs/development/interpreters/lfe/generic-builder.nix b/pkgs/development/interpreters/lfe/generic-builder.nix
index d6090152d158f..895054fac4671 100644
--- a/pkgs/development/interpreters/lfe/generic-builder.nix
+++ b/pkgs/development/interpreters/lfe/generic-builder.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
+{ lib, fetchFromGitHub, erlang, makeWrapper, coreutils, bash, buildRebar3, buildHex }:
 
 { baseName ? "lfe"
 , version
diff --git a/pkgs/development/interpreters/perl/wrapper.nix b/pkgs/development/interpreters/perl/wrapper.nix
index 865d8fde9eace..da95b5a896477 100644
--- a/pkgs/development/interpreters/perl/wrapper.nix
+++ b/pkgs/development/interpreters/perl/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perl, buildEnv, makeWrapper
+{ lib, perl, buildEnv, makeWrapper
 , extraLibs ? []
 , extraOutputsToInstall ? []
 , postBuild ? ""
diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index 668adf2c44a26..a9c71c6fcf709 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.5.1.1"; in
 
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 2c4c74baecf1b..12429c05fe637 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let version = "0.9.6.4"; in
 
diff --git a/pkgs/development/java-modules/build-maven-package.nix b/pkgs/development/java-modules/build-maven-package.nix
index cb895d9c67206..432f972b0ff64 100644
--- a/pkgs/development/java-modules/build-maven-package.nix
+++ b/pkgs/development/java-modules/build-maven-package.nix
@@ -5,7 +5,7 @@ with builtins;
 with lib;
 
 let
-  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs stdenv; };
+  mavenMinimal = import ./maven-minimal.nix { inherit lib pkgs ; };
 in stdenv.mkDerivation rec {
   inherit mavenDeps src name meta m2Path;
 
diff --git a/pkgs/development/java-modules/junit/default.nix b/pkgs/development/java-modules/junit/default.nix
index c4b02071ec043..2cb9ab001c29b 100644
--- a/pkgs/development/java-modules/junit/default.nix
+++ b/pkgs/development/java-modules/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild, fetchMaven }:
+{ lib, pkgs, mavenbuild, fetchMaven }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-hello/default.nix b/pkgs/development/java-modules/maven-hello/default.nix
index e0087e857a479..eac127b6dccc7 100644
--- a/pkgs/development/java-modules/maven-hello/default.nix
+++ b/pkgs/development/java-modules/maven-hello/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs, mavenbuild }:
+{ lib, pkgs, mavenbuild }:
 
 with pkgs.javaPackages;
 
diff --git a/pkgs/development/java-modules/maven-minimal.nix b/pkgs/development/java-modules/maven-minimal.nix
index 9019e3ba28e9c..d966a75bb9d0a 100644
--- a/pkgs/development/java-modules/maven-minimal.nix
+++ b/pkgs/development/java-modules/maven-minimal.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgs }:
+{ lib, pkgs }:
 
 with lib;
 with pkgs.javaPackages;
diff --git a/pkgs/development/libraries/agda/agda-prelude/default.nix b/pkgs/development/libraries/agda/agda-prelude/default.nix
index 79bb783cc9ffb..21883acd19585 100644
--- a/pkgs/development/libraries/agda/agda-prelude/default.nix
+++ b/pkgs/development/libraries/agda/agda-prelude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation rec {
   version = "compat-2.6.1";
diff --git a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
index 7ec892bfe0232..ce4deb5b51909 100644
--- a/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
+++ b/pkgs/development/libraries/agda/functional-linear-algebra/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, mkDerivation, standard-library }:
+{ fetchFromGitHub, lib, mkDerivation, standard-library }:
 
 mkDerivation rec {
   version = "0.1";
diff --git a/pkgs/development/libraries/agda/iowa-stdlib/default.nix b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
index 2ebb3f66ed088..1383cff9e55a3 100644
--- a/pkgs/development/libraries/agda/iowa-stdlib/default.nix
+++ b/pkgs/development/libraries/agda/iowa-stdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub }:
+{ lib, mkDerivation, fetchFromGitHub }:
 
 mkDerivation (rec {
   version = "1.5.0";
diff --git a/pkgs/development/libraries/agda/standard-library/default.nix b/pkgs/development/libraries/agda/standard-library/default.nix
index 1d8dc03bbde95..c0b0287d89721 100644
--- a/pkgs/development/libraries/agda/standard-library/default.nix
+++ b/pkgs/development/libraries/agda/standard-library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, ghcWithPackages }:
+{ lib, mkDerivation, fetchFromGitHub, ghcWithPackages }:
 
 mkDerivation rec {
   pname = "standard-library";
diff --git a/pkgs/development/libraries/appstream/qt.nix b/pkgs/development/libraries/appstream/qt.nix
index c9fc96b325127..9ae1cce684ab8 100644
--- a/pkgs/development/libraries/appstream/qt.nix
+++ b/pkgs/development/libraries/appstream/qt.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, appstream, qtbase, qttools }:
+{ mkDerivation, appstream, qtbase, qttools }:
 
 # TODO: look into using the libraries from the regular appstream derivation as we keep duplicates here
 
diff --git a/pkgs/development/libraries/boost/1.59.nix b/pkgs/development/libraries/boost/1.59.nix
index fb65e49c500c1..0f6e9a35b6e07 100644
--- a/pkgs/development/libraries/boost/1.59.nix
+++ b/pkgs/development/libraries/boost/1.59.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.59.0";
diff --git a/pkgs/development/libraries/boost/1.60.nix b/pkgs/development/libraries/boost/1.60.nix
index 646f4652f77da..4bc7a1cc7327d 100644
--- a/pkgs/development/libraries/boost/1.60.nix
+++ b/pkgs/development/libraries/boost/1.60.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.60.0";
diff --git a/pkgs/development/libraries/boost/1.65.nix b/pkgs/development/libraries/boost/1.65.nix
index 922c09ba7fe9c..764f38d5b7472 100644
--- a/pkgs/development/libraries/boost/1.65.nix
+++ b/pkgs/development/libraries/boost/1.65.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.65.1";
diff --git a/pkgs/development/libraries/boost/1.66.nix b/pkgs/development/libraries/boost/1.66.nix
index 0a99717a79970..af61aa51944c7 100644
--- a/pkgs/development/libraries/boost/1.66.nix
+++ b/pkgs/development/libraries/boost/1.66.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, ... } @ args:
+{ callPackage, fetchurl, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.66.0";
diff --git a/pkgs/development/libraries/boost/1.68.nix b/pkgs/development/libraries/boost/1.68.nix
index 4d98172c6d05f..920dd9a300b14 100644
--- a/pkgs/development/libraries/boost/1.68.nix
+++ b/pkgs/development/libraries/boost/1.68.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.68.0";
diff --git a/pkgs/development/libraries/boost/1.69.nix b/pkgs/development/libraries/boost/1.69.nix
index 95c4aa854a463..7292356ecd1c4 100644
--- a/pkgs/development/libraries/boost/1.69.nix
+++ b/pkgs/development/libraries/boost/1.69.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.69.0";
diff --git a/pkgs/development/libraries/boost/1.70.nix b/pkgs/development/libraries/boost/1.70.nix
index 45a8bdb931859..3b898cfc0ae5b 100644
--- a/pkgs/development/libraries/boost/1.70.nix
+++ b/pkgs/development/libraries/boost/1.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // {
   version = "1.70.0";
diff --git a/pkgs/development/libraries/boost/1.71.nix b/pkgs/development/libraries/boost/1.71.nix
index 7b128e25bb608..bec741dd88a27 100644
--- a/pkgs/development/libraries/boost/1.71.nix
+++ b/pkgs/development/libraries/boost/1.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.71.0";
diff --git a/pkgs/development/libraries/boost/1.72.nix b/pkgs/development/libraries/boost/1.72.nix
index 680afe8bcb87a..97dad9b6c8a80 100644
--- a/pkgs/development/libraries/boost/1.72.nix
+++ b/pkgs/development/libraries/boost/1.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.72.0";
diff --git a/pkgs/development/libraries/boost/1.73.nix b/pkgs/development/libraries/boost/1.73.nix
index 99a5486f197e8..289bea197c354 100644
--- a/pkgs/development/libraries/boost/1.73.nix
+++ b/pkgs/development/libraries/boost/1.73.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.73.0";
diff --git a/pkgs/development/libraries/boost/1.74.nix b/pkgs/development/libraries/boost/1.74.nix
index 35b4013dcb369..a181ed94c266b 100644
--- a/pkgs/development/libraries/boost/1.74.nix
+++ b/pkgs/development/libraries/boost/1.74.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.74.0";
diff --git a/pkgs/development/libraries/boost/1.75.nix b/pkgs/development/libraries/boost/1.75.nix
index 9912032c77743..ff1073bd02681 100644
--- a/pkgs/development/libraries/boost/1.75.nix
+++ b/pkgs/development/libraries/boost/1.75.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl, fetchpatch, ... } @ args:
+{ callPackage, fetchurl, fetchpatch, ... } @ args:
 
 callPackage ./generic.nix (args // rec {
   version = "1.75.0";
diff --git a/pkgs/development/libraries/cxxtest/default.nix b/pkgs/development/libraries/cxxtest/default.nix
index 1a828cc451dc5..3469cda3fc703 100644
--- a/pkgs/development/libraries/cxxtest/default.nix
+++ b/pkgs/development/libraries/cxxtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub }:
+{ lib, buildPythonApplication, fetchFromGitHub }:
 
 buildPythonApplication rec {
   pname = "cxxtest";
diff --git a/pkgs/development/libraries/ffmpeg/3.4.nix b/pkgs/development/libraries/ffmpeg/3.4.nix
index 629fdba5673ac..be341d588c1d6 100644
--- a/pkgs/development/libraries/ffmpeg/3.4.nix
+++ b/pkgs/development/libraries/ffmpeg/3.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia
 , ...
diff --git a/pkgs/development/libraries/ffmpeg/4.nix b/pkgs/development/libraries/ffmpeg/4.nix
index 7e3941d3f3782..2cc409fc03704 100644
--- a/pkgs/development/libraries/ffmpeg/4.nix
+++ b/pkgs/development/libraries/ffmpeg/4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchpatch
+{ callPackage, fetchpatch
 # Darwin frameworks
 , Cocoa, CoreMedia, VideoToolbox
 , ...
diff --git a/pkgs/development/libraries/java/junit/default.nix b/pkgs/development/libraries/java/junit/default.nix
index 1695d11cb25f0..5a10798517729 100644
--- a/pkgs/development/libraries/java/junit/default.nix
+++ b/pkgs/development/libraries/java/junit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, antBuild, fetchgit, perl }:
+{ lib, antBuild, fetchgit, perl }:
 
 let
   version = "4.11";
diff --git a/pkgs/development/libraries/libcollectdclient/default.nix b/pkgs/development/libraries/libcollectdclient/default.nix
index df8db3ac9f892..0bf654ee963cb 100644
--- a/pkgs/development/libraries/libcollectdclient/default.nix
+++ b/pkgs/development/libraries/libcollectdclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, collectd }:
+{ lib, collectd }:
 with lib;
 
 collectd.overrideAttrs (oldAttrs: {
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
index 1cd04b0b2777a..c0321e327c52d 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.70.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.70";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
index 74bd6cce42c4c..7e60f8c72726b 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.71.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.71";
diff --git a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
index 8eeb94cdc2951..4c695218184cc 100644
--- a/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
+++ b/pkgs/development/libraries/libmicrohttpd/0.9.72.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchurl }:
+{ callPackage, fetchurl }:
 
 callPackage ./generic.nix ( rec {
   version = "0.9.72";
diff --git a/pkgs/development/libraries/lief/default.nix b/pkgs/development/libraries/lief/default.nix
index 3b57d0c2f7aee..953eee3b8bdb5 100644
--- a/pkgs/development/libraries/lief/default.nix
+++ b/pkgs/development/libraries/lief/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 fetchzip {
   url = "https://github.com/lief-project/LIEF/releases/download/0.9.0/LIEF-0.9.0-Linux.tar.gz";
diff --git a/pkgs/development/libraries/mlt/qt-5.nix b/pkgs/development/libraries/mlt/qt-5.nix
index 7004a5e11c043..7434383e16501 100644
--- a/pkgs/development/libraries/mlt/qt-5.nix
+++ b/pkgs/development/libraries/mlt/qt-5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , SDL
 , ffmpeg
diff --git a/pkgs/development/libraries/packr/default.nix b/pkgs/development/libraries/packr/default.nix
index 7bf0cb2c5fbc5..e3abc6e5d62e4 100644
--- a/pkgs/development/libraries/packr/default.nix
+++ b/pkgs/development/libraries/packr/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 , symlinkJoin
 }:
 
diff --git a/pkgs/development/libraries/pkger/default.nix b/pkgs/development/libraries/pkger/default.nix
index 4d7c682f02294..f2e984c8c8162 100644
--- a/pkgs/development/libraries/pkger/default.nix
+++ b/pkgs/development/libraries/pkger/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 
 buildGoModule rec {
diff --git a/pkgs/development/libraries/prototypejs/default.nix b/pkgs/development/libraries/prototypejs/default.nix
index 81e72036694b4..fd06b49604add 100644
--- a/pkgs/development/libraries/prototypejs/default.nix
+++ b/pkgs/development/libraries/prototypejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, ... }:
+{ lib, fetchurl, ... }:
 let
   version = "1.7.3.0";
 in fetchurl {
diff --git a/pkgs/development/libraries/psol/generic.nix b/pkgs/development/libraries/psol/generic.nix
index 57784c3a50288..aa2522a5dad19 100644
--- a/pkgs/development/libraries/psol/generic.nix
+++ b/pkgs/development/libraries/psol/generic.nix
@@ -1,4 +1,4 @@
-{ fetchzip, lib, stdenv }:
+{ fetchzip, lib }:
 { version, sha256 }:
 { inherit version; } // fetchzip {
   inherit sha256;
diff --git a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
index 6639e4c8d697f..5e7ccf702045b 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, qtModule, qtbase }:
+{ lib, qtModule, qtbase }:
 
 qtModule {
   name = "qtmacextras";
diff --git a/pkgs/development/libraries/qtstyleplugins/default.nix b/pkgs/development/libraries/qtstyleplugins/default.nix
index 84d7f46a2b29b..4587bf4616246 100644
--- a/pkgs/development/libraries/qtstyleplugins/default.nix
+++ b/pkgs/development/libraries/qtstyleplugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pkg-config, gtk2 }:
 
 mkDerivation {
   name = "qtstyleplugins-2017-03-11";
diff --git a/pkgs/development/libraries/scriptaculous/default.nix b/pkgs/development/libraries/scriptaculous/default.nix
index c2beda45ab3ae..e3c8ea00f4467 100644
--- a/pkgs/development/libraries/scriptaculous/default.nix
+++ b/pkgs/development/libraries/scriptaculous/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, unzip, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, unzip, ... }:
+
+stdenv.mkDerivation rec {
   pname = "scriptaculous";
   version = "1.9.0";
 
diff --git a/pkgs/development/libraries/smarty3-i18n/default.nix b/pkgs/development/libraries/smarty3-i18n/default.nix
index 7fb6b1adb5a87..e617ba58e8b44 100644
--- a/pkgs/development/libraries/smarty3-i18n/default.nix
+++ b/pkgs/development/libraries/smarty3-i18n/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty-i18n";
   version = "1.0";
 
diff --git a/pkgs/development/libraries/smarty3/default.nix b/pkgs/development/libraries/smarty3/default.nix
index 2070a3bab7903..29f640dedfcbe 100644
--- a/pkgs/development/libraries/smarty3/default.nix
+++ b/pkgs/development/libraries/smarty3/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "smarty3";
   version = "3.1.36";
 
diff --git a/pkgs/development/libraries/stellarsolver/default.nix b/pkgs/development/libraries/stellarsolver/default.nix
index 8badf60d94216..f55c72bd2095c 100644
--- a/pkgs/development/libraries/stellarsolver/default.nix
+++ b/pkgs/development/libraries/stellarsolver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake,
+{ lib, mkDerivation, fetchFromGitHub, cmake,
   qtbase, cfitsio, gsl, wcslib, withTester ? false }:
 
 mkDerivation rec {
diff --git a/pkgs/development/libraries/vapoursynth/editor.nix b/pkgs/development/libraries/vapoursynth/editor.nix
index 76b50a10907e6..f9ebed1975222 100644
--- a/pkgs/development/libraries/vapoursynth/editor.nix
+++ b/pkgs/development/libraries/vapoursynth/editor.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromBitbucket
+{ lib, mkDerivation, fetchFromBitbucket
 , python3, vapoursynth
 , qmake, qtbase, qtwebsockets
 }:
diff --git a/pkgs/development/lua-modules/generated-packages.nix b/pkgs/development/lua-modules/generated-packages.nix
index 8ec44d17016a2..85f392285841b 100644
--- a/pkgs/development/lua-modules/generated-packages.nix
+++ b/pkgs/development/lua-modules/generated-packages.nix
@@ -5,7 +5,7 @@ nixpkgs$ maintainers/scripts/update-luarocks-packages pkgs/development/lua-modul
 
 These packages are manually refined in lua-overrides.nix
 */
-{ self, stdenv, lib, fetchurl, fetchgit, pkgs, ... } @ args:
+{ self, lib, fetchurl, fetchgit, pkgs, ... } @ args:
 self: super:
 with self;
 {
diff --git a/pkgs/development/misc/haskell/hasura/ci-info/default.nix b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
index 55b070a9f7730..2770e74a6988a 100644
--- a/pkgs/development/misc/haskell/hasura/ci-info/default.nix
+++ b/pkgs/development/misc/haskell/hasura/ci-info/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, aeson-casing, base, fetchgit, hashable
-, hpack, lib, stdenv, template-haskell, text, th-lift-instances
+, hpack, lib, template-haskell, text, th-lift-instances
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
index 3cf840c15e15f..9e7d448e4c1ee 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-engine/default.nix
@@ -13,7 +13,7 @@
 , optparse-applicative, pem, pg-client, postgresql-binary
 , postgresql-libpq, process, profunctors, psqueues, QuickCheck
 , regex-tdfa, safe, scientific, semver, shakespeare, split
-, Spock-core, lib, stdenv, stm, stm-containers, template-haskell, text
+, Spock-core, lib, stm, stm-containers, template-haskell, text
 , text-builder, text-conversions, th-lift-instances, these, time
 , transformers, transformers-base, unix, unordered-containers
 , uri-encode, uuid, vector, wai, wai-websockets, warp, websockets
diff --git a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
index 82314a7485ba4..dbd3edf006412 100644
--- a/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
+++ b/pkgs/development/misc/haskell/hasura/graphql-parser/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, attoparsec, base, bytestring, containers
 , criterion, fetchgit, filepath, hedgehog, hpack, prettyprinter
-, protolude, regex-tdfa, scientific, lib, stdenv, template-haskell, text
+, protolude, regex-tdfa, scientific, lib, template-haskell, text
 , text-builder, th-lift-instances, unordered-containers, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/haskell/hasura/pg-client/default.nix b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
index aa780abd8e99d..bccb3f6eda3d6 100644
--- a/pkgs/development/misc/haskell/hasura/pg-client/default.nix
+++ b/pkgs/development/misc/haskell/hasura/pg-client/default.nix
@@ -2,7 +2,7 @@
 , criterion, fetchgit, file-embed, hashable, hashtables, hasql
 , hasql-pool, hasql-transaction, monad-control, mtl
 , postgresql-binary, postgresql-libpq, resource-pool, retry
-, scientific, lib, stdenv, template-haskell, text, text-builder, th-lift
+, scientific, lib, template-haskell, text, text-builder, th-lift
 , th-lift-instances, time, transformers-base, uuid, vector
 }:
 mkDerivation {
diff --git a/pkgs/development/misc/loc/default.nix b/pkgs/development/misc/loc/default.nix
index 74b5ca09d2a25..fb518279d00b8 100644
--- a/pkgs/development/misc/loc/default.nix
+++ b/pkgs/development/misc/loc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/ocaml-modules/janestreet/variantslib.nix b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
index 3fd7877d2bb41..053ab412f88dd 100644
--- a/pkgs/development/ocaml-modules/janestreet/variantslib.nix
+++ b/pkgs/development/ocaml-modules/janestreet/variantslib.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildOcamlJane, type_conv}:
+{lib, buildOcamlJane, type_conv}:
 
 buildOcamlJane {
   name = "variantslib";
diff --git a/pkgs/development/ocaml-modules/kafka/default.nix b/pkgs/development/ocaml-modules/kafka/default.nix
index d1ebe95be89d6..66055dca66e67 100644
--- a/pkgs/development/ocaml-modules/kafka/default.nix
+++ b/pkgs/development/ocaml-modules/kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
+{ lib, fetchFromGitHub, buildDunePackage, base, cmdliner, ocaml_lwt,
   rdkafka, zlib }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/parany/default.nix b/pkgs/development/ocaml-modules/parany/default.nix
index 34e14959e327b..afe9e7d39b57d 100644
--- a/pkgs/development/ocaml-modules/parany/default.nix
+++ b/pkgs/development/ocaml-modules/parany/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
+{ lib, buildDunePackage, fetchFromGitHub, ocamlnet, cpu }:
 
 buildDunePackage rec {
   pname = "parany";
diff --git a/pkgs/development/ocaml-modules/phylogenetics/default.nix b/pkgs/development/ocaml-modules/phylogenetics/default.nix
index d3d6097b4462d..b284f7ef5eba8 100644
--- a/pkgs/development/ocaml-modules/phylogenetics/default.nix
+++ b/pkgs/development/ocaml-modules/phylogenetics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildDunePackage, fetchFromGitHub, ppx_deriving
+{ lib, buildDunePackage, fetchFromGitHub, ppx_deriving
 , alcotest, angstrom-unix, biocaml, gnuplot, gsl, lacaml, menhir, owl, printbox }:
 
 buildDunePackage rec {
diff --git a/pkgs/development/ocaml-modules/wtf8/default.nix b/pkgs/development/ocaml-modules/wtf8/default.nix
index b46386b1666f2..828df66b41d59 100644
--- a/pkgs/development/ocaml-modules/wtf8/default.nix
+++ b/pkgs/development/ocaml-modules/wtf8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildDunePackage }:
+{ lib, fetchurl, buildDunePackage }:
 
 buildDunePackage rec {
   pname = "wtf8";
diff --git a/pkgs/development/perl-modules/MNI/default.nix b/pkgs/development/perl-modules/MNI/default.nix
index c0fc8f2810856..2ef7b90842ead 100644
--- a/pkgs/development/perl-modules/MNI/default.nix
+++ b/pkgs/development/perl-modules/MNI/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildPerlPackage, lib, stdenv }:
+{ fetchFromGitHub, buildPerlPackage, lib }:
 
 buildPerlPackage {
   pname = "MNI-Perllib";
diff --git a/pkgs/development/perl-modules/Percona-Toolkit/default.nix b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
index 3c555ca37ab51..5efac53f83750 100644
--- a/pkgs/development/perl-modules/Percona-Toolkit/default.nix
+++ b/pkgs/development/perl-modules/Percona-Toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
+{ lib, fetchFromGitHub, buildPerlPackage, shortenPerlShebang
 , DBDmysql, DBI, IOSocketSSL, TermReadKey
 }:
 
diff --git a/pkgs/development/perl-modules/maatkit/default.nix b/pkgs/development/perl-modules/maatkit/default.nix
index 29bcc9bab25f8..d6945083f6343 100644
--- a/pkgs/development/perl-modules/maatkit/default.nix
+++ b/pkgs/development/perl-modules/maatkit/default.nix
@@ -1,4 +1,4 @@
-{buildPerlPackage, lib, stdenv, fetchurl, DBDmysql}:
+{buildPerlPackage, lib, fetchurl, DBDmysql}:
 
 buildPerlPackage {
   pname = "maatkit";
diff --git a/pkgs/development/python-modules/FormEncode/default.nix b/pkgs/development/python-modules/FormEncode/default.nix
index 2b06fcdce7d26..74884f36f033e 100644
--- a/pkgs/development/python-modules/FormEncode/default.nix
+++ b/pkgs/development/python-modules/FormEncode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, dnspython, pycountry, nose, setuptools_scm, six, isPy27 }:
 
 buildPythonPackage rec {
   pname = "FormEncode";
diff --git a/pkgs/development/python-modules/HTSeq/default.nix b/pkgs/development/python-modules/HTSeq/default.nix
index be4bb9e31d328..486f8a4556f54 100644
--- a/pkgs/development/python-modules/HTSeq/default.nix
+++ b/pkgs/development/python-modules/HTSeq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, numpy, pysam, matplotlib, python, isPy27, isPy3k }:
 buildPythonPackage rec {
   version = "0.12.4";
   pname = "HTSeq";
diff --git a/pkgs/development/python-modules/IPy/default.nix b/pkgs/development/python-modules/IPy/default.nix
index f142c24592237..05587ef07401b 100644
--- a/pkgs/development/python-modules/IPy/default.nix
+++ b/pkgs/development/python-modules/IPy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "IPy";
diff --git a/pkgs/development/python-modules/PyLD/default.nix b/pkgs/development/python-modules/PyLD/default.nix
index 247b7f0332f5a..5a4741a730ace 100644
--- a/pkgs/development/python-modules/PyLD/default.nix
+++ b/pkgs/development/python-modules/PyLD/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, requests, gnugrep }:
 
 let
 
diff --git a/pkgs/development/python-modules/ROPGadget/default.nix b/pkgs/development/python-modules/ROPGadget/default.nix
index ebedb3c696939..8c34e75139f6c 100644
--- a/pkgs/development/python-modules/ROPGadget/default.nix
+++ b/pkgs/development/python-modules/ROPGadget/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , capstone}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/Wand/default.nix b/pkgs/development/python-modules/Wand/default.nix
index d7ad28c013361..e180f0cea3324 100644
--- a/pkgs/development/python-modules/Wand/default.nix
+++ b/pkgs/development/python-modules/Wand/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , imagemagick7Big
diff --git a/pkgs/development/python-modules/WazeRouteCalculator/default.nix b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
index 28515e6f6028c..6da500413f0e4 100644
--- a/pkgs/development/python-modules/WazeRouteCalculator/default.nix
+++ b/pkgs/development/python-modules/WazeRouteCalculator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aadict/default.nix b/pkgs/development/python-modules/aadict/default.nix
index cf6976fa6c1ed..de3ec6fa7f051 100644
--- a/pkgs/development/python-modules/aadict/default.nix
+++ b/pkgs/development/python-modules/aadict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/aafigure/default.nix b/pkgs/development/python-modules/aafigure/default.nix
index 5350443eeaabd..0b9f14571781f 100644
--- a/pkgs/development/python-modules/aafigure/default.nix
+++ b/pkgs/development/python-modules/aafigure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow }:
+{ lib, buildPythonPackage, fetchPypi, pillow }:
 
 buildPythonPackage rec {
   pname = "aafigure";
diff --git a/pkgs/development/python-modules/acebinf/default.nix b/pkgs/development/python-modules/acebinf/default.nix
index f8134aaf5b315..7889e007d83ee 100644
--- a/pkgs/development/python-modules/acebinf/default.nix
+++ b/pkgs/development/python-modules/acebinf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyvcf
diff --git a/pkgs/development/python-modules/acme-tiny/default.nix b/pkgs/development/python-modules/acme-tiny/default.nix
index 75408244e66ab..c979104914da1 100644
--- a/pkgs/development/python-modules/acme-tiny/default.nix
+++ b/pkgs/development/python-modules/acme-tiny/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, fusepy, fuse
 , openssl }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/actdiag/default.nix b/pkgs/development/python-modules/actdiag/default.nix
index ca47018f56f4d..92917f6ea9548 100644
--- a/pkgs/development/python-modules/actdiag/default.nix
+++ b/pkgs/development/python-modules/actdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, docutils, blockdiag, reportlab }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/adal/default.nix b/pkgs/development/python-modules/adal/default.nix
index f7e973c8f6932..55dc21240ec22 100644
--- a/pkgs/development/python-modules/adal/default.nix
+++ b/pkgs/development/python-modules/adal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, pyjwt, dateutil }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aenum/default.nix b/pkgs/development/python-modules/aenum/default.nix
index f21d8f4195a4c..4f30eefbf9005 100644
--- a/pkgs/development/python-modules/aenum/default.nix
+++ b/pkgs/development/python-modules/aenum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
+{ lib, fetchPypi, buildPythonPackage, python, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "aenum";
diff --git a/pkgs/development/python-modules/agate-dbf/default.nix b/pkgs/development/python-modules/agate-dbf/default.nix
index 099fb1701cb4c..0299a94ebb0fa 100644
--- a/pkgs/development/python-modules/agate-dbf/default.nix
+++ b/pkgs/development/python-modules/agate-dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
+{ lib, fetchPypi, buildPythonPackage, agate, dbf, dbfread }:
 
 buildPythonPackage rec {
     pname = "agate-dbf";
diff --git a/pkgs/development/python-modules/agate-sql/default.nix b/pkgs/development/python-modules/agate-sql/default.nix
index 566951ea71d14..29bbfa81ed230 100644
--- a/pkgs/development/python-modules/agate-sql/default.nix
+++ b/pkgs/development/python-modules/agate-sql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
+{ lib, fetchPypi, buildPythonPackage, agate, sqlalchemy, crate }:
 
 buildPythonPackage rec {
     pname = "agate-sql";
diff --git a/pkgs/development/python-modules/aiobotocore/default.nix b/pkgs/development/python-modules/aiobotocore/default.nix
index 308219865393f..2e7c9c2401c35 100644
--- a/pkgs/development/python-modules/aiobotocore/default.nix
+++ b/pkgs/development/python-modules/aiobotocore/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aiodns/default.nix b/pkgs/development/python-modules/aiodns/default.nix
index 4ba4bd59af278..1adc6f8152441 100644
--- a/pkgs/development/python-modules/aiodns/default.nix
+++ b/pkgs/development/python-modules/aiodns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , isPy27, isPyPy, python, pycares, typing, trollius }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/aioeventlet/default.nix b/pkgs/development/python-modules/aioeventlet/default.nix
index 4bdd2b1327cd7..0d6796706cbd4 100644
--- a/pkgs/development/python-modules/aioeventlet/default.nix
+++ b/pkgs/development/python-modules/aioeventlet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , eventlet
diff --git a/pkgs/development/python-modules/aioitertools/default.nix b/pkgs/development/python-modules/aioitertools/default.nix
index 1c5ce1e2faeb3..91d83e93cbd84 100644
--- a/pkgs/development/python-modules/aioitertools/default.nix
+++ b/pkgs/development/python-modules/aioitertools/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/aioredis/default.nix b/pkgs/development/python-modules/aioredis/default.nix
index 94f503fe2cc32..fe48ba0e1e184 100644
--- a/pkgs/development/python-modules/aioredis/default.nix
+++ b/pkgs/development/python-modules/aioredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pkgs, async-timeout, hiredis, isPyPy, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/aiozeroconf/default.nix b/pkgs/development/python-modules/aiozeroconf/default.nix
index d73ae2b35dfbc..fe3943c25b1c5 100644
--- a/pkgs/development/python-modules/aiozeroconf/default.nix
+++ b/pkgs/development/python-modules/aiozeroconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , netifaces
diff --git a/pkgs/development/python-modules/ajpy/default.nix b/pkgs/development/python-modules/ajpy/default.nix
index 0dd135e139fd1..926b5ed7efee9 100644
--- a/pkgs/development/python-modules/ajpy/default.nix
+++ b/pkgs/development/python-modules/ajpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ajpy";
diff --git a/pkgs/development/python-modules/alabaster/default.nix b/pkgs/development/python-modules/alabaster/default.nix
index b4cc69e555bcc..72eda332f9519 100644
--- a/pkgs/development/python-modules/alabaster/default.nix
+++ b/pkgs/development/python-modules/alabaster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alarmdecoder/default.nix b/pkgs/development/python-modules/alarmdecoder/default.nix
index b563a80447f25..10438d540816f 100644
--- a/pkgs/development/python-modules/alarmdecoder/default.nix
+++ b/pkgs/development/python-modules/alarmdecoder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
+{ lib, buildPythonPackage, fetchFromGitHub, pyserial, pyftdi, pyusb
 , pyopenssl, nose, isPy3k, pythonOlder, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alembic/default.nix b/pkgs/development/python-modules/alembic/default.nix
index 142c6d1c416c7..5a4ef5e0bc6e3 100644
--- a/pkgs/development/python-modules/alembic/default.nix
+++ b/pkgs/development/python-modules/alembic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, coverage, setuptools
 , Mako, sqlalchemy, python-editor, dateutil
 }:
diff --git a/pkgs/development/python-modules/alerta-server/default.nix b/pkgs/development/python-modules/alerta-server/default.nix
index dd2d82578ea23..82783dd16bb51 100644
--- a/pkgs/development/python-modules/alerta-server/default.nix
+++ b/pkgs/development/python-modules/alerta-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , bcrypt, blinker, flask, flask-compress, flask-cors, mohawk, psycopg2, pyjwt, pymongo, python-dateutil, pytz, pyyaml, requests, requests-hawk, sentry-sdk
 }:
 
diff --git a/pkgs/development/python-modules/alerta/default.nix b/pkgs/development/python-modules/alerta/default.nix
index 19dd17ee3f023..e69503777d4e3 100644
--- a/pkgs/development/python-modules/alerta/default.nix
+++ b/pkgs/development/python-modules/alerta/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, click, requests, requests-hawk, pytz, tabulate, pythonOlder
 }:
 
diff --git a/pkgs/development/python-modules/alot/default.nix b/pkgs/development/python-modules/alot/default.nix
index 21c6aaff2fbc4..1f4617ce9c0d4 100644
--- a/pkgs/development/python-modules/alot/default.nix
+++ b/pkgs/development/python-modules/alot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
+{ lib, buildPythonPackage, python, fetchFromGitHub, fetchpatch, isPy3k
 , notmuch, urwid, urwidtrees, twisted, python_magic, configobj, mock, file, gpgme
 , service-identity
 , gnupg ? null, sphinx, awk ? null, procps ? null, future ? null
diff --git a/pkgs/development/python-modules/altair/default.nix b/pkgs/development/python-modules/altair/default.nix
index a3b515ebeca8f..37c1efd9c1b62 100644
--- a/pkgs/development/python-modules/altair/default.nix
+++ b/pkgs/development/python-modules/altair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , entrypoints
 , glibcLocales
 , ipython
diff --git a/pkgs/development/python-modules/amazon_kclpy/default.nix b/pkgs/development/python-modules/amazon_kclpy/default.nix
index ed266c0db7887..44dc739f1ca8c 100644
--- a/pkgs/development/python-modules/amazon_kclpy/default.nix
+++ b/pkgs/development/python-modules/amazon_kclpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, mock, boto, pytest }:
 
 buildPythonPackage rec {
   pname = "amazon_kclpy";
diff --git a/pkgs/development/python-modules/amply/default.nix b/pkgs/development/python-modules/amply/default.nix
index 32bcbb4589ab9..0589caf1e6a15 100644
--- a/pkgs/development/python-modules/amply/default.nix
+++ b/pkgs/development/python-modules/amply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/amqp/default.nix b/pkgs/development/python-modules/amqp/default.nix
index b614ae453d256..be40465496c95 100644
--- a/pkgs/development/python-modules/amqp/default.nix
+++ b/pkgs/development/python-modules/amqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook, case, vine }:
 
 buildPythonPackage rec {
   pname = "amqp";
diff --git a/pkgs/development/python-modules/amqplib/default.nix b/pkgs/development/python-modules/amqplib/default.nix
index c7b4dc865bb8a..430065b7d1f80 100644
--- a/pkgs/development/python-modules/amqplib/default.nix
+++ b/pkgs/development/python-modules/amqplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "amqplib";
diff --git a/pkgs/development/python-modules/aniso8601/default.nix b/pkgs/development/python-modules/aniso8601/default.nix
index 804402a4ca672..538cb11db13f9 100644
--- a/pkgs/development/python-modules/aniso8601/default.nix
+++ b/pkgs/development/python-modules/aniso8601/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , dateutil, mock, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/annoy/default.nix b/pkgs/development/python-modules/annoy/default.nix
index 0bd060843809a..d5f24492c90ae 100644
--- a/pkgs/development/python-modules/annoy/default.nix
+++ b/pkgs/development/python-modules/annoy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , h5py
diff --git a/pkgs/development/python-modules/anonip/default.nix b/pkgs/development/python-modules/anonip/default.nix
index 9c1b3abf9800f..0663fddd6fb0f 100644
--- a/pkgs/development/python-modules/anonip/default.nix
+++ b/pkgs/development/python-modules/anonip/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, ipaddress, isPy27 }:
 
 buildPythonPackage rec {
   pname = "anonip";
diff --git a/pkgs/development/python-modules/ansicolor/default.nix b/pkgs/development/python-modules/ansicolor/default.nix
index 3d96061362e9f..99a419a60faef 100644
--- a/pkgs/development/python-modules/ansicolor/default.nix
+++ b/pkgs/development/python-modules/ansicolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ansicolor";
diff --git a/pkgs/development/python-modules/ansicolors/default.nix b/pkgs/development/python-modules/ansicolors/default.nix
index 7d6dd2127e675..fab91690ab23a 100644
--- a/pkgs/development/python-modules/ansicolors/default.nix
+++ b/pkgs/development/python-modules/ansicolors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "ansicolors";
diff --git a/pkgs/development/python-modules/ansiconv/default.nix b/pkgs/development/python-modules/ansiconv/default.nix
index 6a3571960d03b..ba0c06f536aa9 100644
--- a/pkgs/development/python-modules/ansiconv/default.nix
+++ b/pkgs/development/python-modules/ansiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "ansiconv";
diff --git a/pkgs/development/python-modules/apipkg/default.nix b/pkgs/development/python-modules/apipkg/default.nix
index 604c37b42ba1d..10e2369e12eea 100644
--- a/pkgs/development/python-modules/apipkg/default.nix
+++ b/pkgs/development/python-modules/apipkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/approvaltests/default.nix b/pkgs/development/python-modules/approvaltests/default.nix
index bc47de371288f..6f2c55d45cb60 100644
--- a/pkgs/development/python-modules/approvaltests/default.nix
+++ b/pkgs/development/python-modules/approvaltests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy37, pyperclip }:
 
 buildPythonPackage rec {
   version = "0.2.6";
diff --git a/pkgs/development/python-modules/apsw/default.nix b/pkgs/development/python-modules/apsw/default.nix
index de74480765a0e..8933d4e91bcca 100644
--- a/pkgs/development/python-modules/apsw/default.nix
+++ b/pkgs/development/python-modules/apsw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , sqlite, isPyPy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/argh/default.nix b/pkgs/development/python-modules/argh/default.nix
index 0e2beb6a31eb9..bbe120ec14fed 100644
--- a/pkgs/development/python-modules/argh/default.nix
+++ b/pkgs/development/python-modules/argh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/args/default.nix b/pkgs/development/python-modules/args/default.nix
index cb349484f2769..9faf16037d042 100644
--- a/pkgs/development/python-modules/args/default.nix
+++ b/pkgs/development/python-modules/args/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "args";
diff --git a/pkgs/development/python-modules/aria2p/default.nix b/pkgs/development/python-modules/aria2p/default.nix
index 076fec8c56baf..2bb950beb282e 100644
--- a/pkgs/development/python-modules/aria2p/default.nix
+++ b/pkgs/development/python-modules/aria2p/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , aria2, poetry, pytest, pytestcov, pytest_xdist, responses
 , asciimatics, loguru, requests, setuptools, websocket_client
 }:
diff --git a/pkgs/development/python-modules/arrow/default.nix b/pkgs/development/python-modules/arrow/default.nix
index 7dbe3b98fca3b..d87f1ede3ccde 100644
--- a/pkgs/development/python-modules/arrow/default.nix
+++ b/pkgs/development/python-modules/arrow/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , nose, chai, simplejson, backports_functools_lru_cache
 , python-dateutil, pytz, pytest-mock, sphinx, dateparser, pytestcov
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/asana/default.nix b/pkgs/development/python-modules/asana/default.nix
index ed5e441df9706..c7839f051478e 100644
--- a/pkgs/development/python-modules/asana/default.nix
+++ b/pkgs/development/python-modules/asana/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, pythonAtLeast, pytest, requests, requests_oauthlib, six
-, fetchFromGitHub, responses, lib, stdenv
+, fetchFromGitHub, responses, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/asn1ate/default.nix b/pkgs/development/python-modules/asn1ate/default.nix
index 2735bbf2f70f5..a141fc746f78b 100644
--- a/pkgs/development/python-modules/asn1ate/default.nix
+++ b/pkgs/development/python-modules/asn1ate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pyparsing }:
+{ lib, buildPythonPackage, fetchFromGitHub, pyparsing }:
 
 buildPythonPackage rec {
   pname = "asn1ate";
diff --git a/pkgs/development/python-modules/astral/default.nix b/pkgs/development/python-modules/astral/default.nix
index 4ea53e17eb0e4..8c97ef6750f77 100644
--- a/pkgs/development/python-modules/astral/default.nix
+++ b/pkgs/development/python-modules/astral/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytz, requests, pytest, freezegun }:
 
 buildPythonPackage rec {
   pname = "astral";
diff --git a/pkgs/development/python-modules/astunparse/default.nix b/pkgs/development/python-modules/astunparse/default.nix
index c9001da5c70f7..b32df24f5bbd0 100644
--- a/pkgs/development/python-modules/astunparse/default.nix
+++ b/pkgs/development/python-modules/astunparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/asyncssh/default.nix b/pkgs/development/python-modules/asyncssh/default.nix
index d3684ea57200c..9271adeb617f9 100644
--- a/pkgs/development/python-modules/asyncssh/default.nix
+++ b/pkgs/development/python-modules/asyncssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , cryptography
 , bcrypt, gssapi, libnacl, libsodium, nettle, pyopenssl
 , openssl, openssh, pytestCheckHook }:
diff --git a/pkgs/development/python-modules/atomiclong/default.nix b/pkgs/development/python-modules/atomiclong/default.nix
index 7bcb36d548d8d..0fccc943c8a47 100644
--- a/pkgs/development/python-modules/atomiclong/default.nix
+++ b/pkgs/development/python-modules/atomiclong/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, cffi }:
+{ lib, buildPythonPackage, fetchPypi, pytest, cffi }:
 
 buildPythonPackage rec {
   pname = "atomiclong";
diff --git a/pkgs/development/python-modules/atomicwrites/default.nix b/pkgs/development/python-modules/atomicwrites/default.nix
index e958b0f16d620..5335c044cd278 100644
--- a/pkgs/development/python-modules/atomicwrites/default.nix
+++ b/pkgs/development/python-modules/atomicwrites/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "atomicwrites";
diff --git a/pkgs/development/python-modules/atomman/default.nix b/pkgs/development/python-modules/atomman/default.nix
index 147d2e77debc4..b576504588aa4 100644
--- a/pkgs/development/python-modules/atomman/default.nix
+++ b/pkgs/development/python-modules/atomman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cython
 , datamodeldict
 , matplotlib
diff --git a/pkgs/development/python-modules/atsim_potentials/default.nix b/pkgs/development/python-modules/atsim_potentials/default.nix
index 6b8b8dccef817..4802ea867b7b3 100644
--- a/pkgs/development/python-modules/atsim_potentials/default.nix
+++ b/pkgs/development/python-modules/atsim_potentials/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , configparser
diff --git a/pkgs/development/python-modules/attrdict/default.nix b/pkgs/development/python-modules/attrdict/default.nix
index 5c7514f9da639..cb87b9027f04b 100644
--- a/pkgs/development/python-modules/attrdict/default.nix
+++ b/pkgs/development/python-modules/attrdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage, nose, six }:
+{ lib, buildPythonPackage, fetchPypi, coverage, nose, six }:
 
 buildPythonPackage rec {
   pname = "attrdict";
diff --git a/pkgs/development/python-modules/authlib/default.nix b/pkgs/development/python-modules/authlib/default.nix
index 3e6faae9af09c..4fa14a60ff830 100644
--- a/pkgs/development/python-modules/authlib/default.nix
+++ b/pkgs/development/python-modules/authlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/authres/default.nix b/pkgs/development/python-modules/authres/default.nix
index c3d0402d48d19..196e573717b71 100644
--- a/pkgs/development/python-modules/authres/default.nix
+++ b/pkgs/development/python-modules/authres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python }:
+{ lib, fetchPypi, buildPythonPackage, python }:
 
 buildPythonPackage rec {
   pname = "authres";
diff --git a/pkgs/development/python-modules/autograd/default.nix b/pkgs/development/python-modules/autograd/default.nix
index fef97a7a6f48d..0bdee21b69c21 100644
--- a/pkgs/development/python-modules/autograd/default.nix
+++ b/pkgs/development/python-modules/autograd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, future }:
+{ lib, buildPythonPackage, fetchPypi, numpy, future }:
 
 buildPythonPackage rec {
   pname = "autograd";
diff --git a/pkgs/development/python-modules/autologging/default.nix b/pkgs/development/python-modules/autologging/default.nix
index 7cd66dc2c3fea..fdd935303d029 100644
--- a/pkgs/development/python-modules/autologging/default.nix
+++ b/pkgs/development/python-modules/autologging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Autologging";
diff --git a/pkgs/development/python-modules/automat/default.nix b/pkgs/development/python-modules/automat/default.nix
index fa395f119ee57..20f54870e1f9f 100644
--- a/pkgs/development/python-modules/automat/default.nix
+++ b/pkgs/development/python-modules/automat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   m2r, setuptools_scm, six, attrs }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/autopep8/default.nix b/pkgs/development/python-modules/autopep8/default.nix
index afeaef4066119..c748c0cb8c1a2 100644
--- a/pkgs/development/python-modules/autopep8/default.nix
+++ b/pkgs/development/python-modules/autopep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
+{ lib, fetchPypi, buildPythonPackage, pycodestyle, glibcLocales
 , toml
 }:
 
diff --git a/pkgs/development/python-modules/avro-python3/default.nix b/pkgs/development/python-modules/avro-python3/default.nix
index 3e9a0e492d3c7..e0294246fb2d8 100644
--- a/pkgs/development/python-modules/avro-python3/default.nix
+++ b/pkgs/development/python-modules/avro-python3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro-python3";
diff --git a/pkgs/development/python-modules/avro/default.nix b/pkgs/development/python-modules/avro/default.nix
index 35cab724a8627..5a38e86eee37d 100644
--- a/pkgs/development/python-modules/avro/default.nix
+++ b/pkgs/development/python-modules/avro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, pycodestyle, isort }:
 
 buildPythonPackage rec {
   pname = "avro";
diff --git a/pkgs/development/python-modules/avro3k/default.nix b/pkgs/development/python-modules/avro3k/default.nix
index b600bc75c7a31..f6ad9bf086cc9 100644
--- a/pkgs/development/python-modules/avro3k/default.nix
+++ b/pkgs/development/python-modules/avro3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "avro3k";
diff --git a/pkgs/development/python-modules/awesome-slugify/default.nix b/pkgs/development/python-modules/awesome-slugify/default.nix
index 00882cb082796..47ca9859b5e72 100644
--- a/pkgs/development/python-modules/awesome-slugify/default.nix
+++ b/pkgs/development/python-modules/awesome-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, unidecode, regex, python }:
+{ lib, buildPythonPackage, fetchPypi, unidecode, regex, python }:
 
 buildPythonPackage rec {
   pname = "awesome-slugify";
diff --git a/pkgs/development/python-modules/b2sdk/default.nix b/pkgs/development/python-modules/b2sdk/default.nix
index da43f6e5690e2..cd695132d7ae7 100644
--- a/pkgs/development/python-modules/b2sdk/default.nix
+++ b/pkgs/development/python-modules/b2sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
 , requests, arrow, logfury, tqdm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/babelfish/default.nix b/pkgs/development/python-modules/babelfish/default.nix
index 5ac0442921567..ba015f597ce60 100644
--- a/pkgs/development/python-modules/babelfish/default.nix
+++ b/pkgs/development/python-modules/babelfish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "babelfish";
diff --git a/pkgs/development/python-modules/babelgladeextractor/default.nix b/pkgs/development/python-modules/babelgladeextractor/default.nix
index 0df03754127bc..b1516d1abdb83 100644
--- a/pkgs/development/python-modules/babelgladeextractor/default.nix
+++ b/pkgs/development/python-modules/babelgladeextractor/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , isPy3k
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/backports-shutil-which/default.nix b/pkgs/development/python-modules/backports-shutil-which/default.nix
index 5fe922b90462e..52163abe8bcf3 100644
--- a/pkgs/development/python-modules/backports-shutil-which/default.nix
+++ b/pkgs/development/python-modules/backports-shutil-which/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "backports.shutil_which";
diff --git a/pkgs/development/python-modules/backports_csv/default.nix b/pkgs/development/python-modules/backports_csv/default.nix
index 5216149ddc2c4..6086178c95978 100644
--- a/pkgs/development/python-modules/backports_csv/default.nix
+++ b/pkgs/development/python-modules/backports_csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, future }:
+{ lib, buildPythonPackage, fetchPypi, future }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/backports_os/default.nix b/pkgs/development/python-modules/backports_os/default.nix
index b3e231bcd05d4..39973e433eedf 100644
--- a/pkgs/development/python-modules/backports_os/default.nix
+++ b/pkgs/development/python-modules/backports_os/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/backports_unittest-mock/default.nix b/pkgs/development/python-modules/backports_unittest-mock/default.nix
index 08f98de79f270..a9950eb704f81 100644
--- a/pkgs/development/python-modules/backports_unittest-mock/default.nix
+++ b/pkgs/development/python-modules/backports_unittest-mock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, mock }:
 
 buildPythonPackage rec {
   pname = "backports.unittest_mock";
diff --git a/pkgs/development/python-modules/backports_weakref/default.nix b/pkgs/development/python-modules/backports_weakref/default.nix
index 9770fb45981dd..c04b88a3f328c 100644
--- a/pkgs/development/python-modules/backports_weakref/default.nix
+++ b/pkgs/development/python-modules/backports_weakref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/bacpypes/default.nix b/pkgs/development/python-modules/bacpypes/default.nix
index 59542e61c56bb..f07c5e90d5171 100644
--- a/pkgs/development/python-modules/bacpypes/default.nix
+++ b/pkgs/development/python-modules/bacpypes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchFromGitHub
+{ lib, buildPythonPackage, fetchPypi, fetchFromGitHub
 , wheel, pytestCheckHook, pytestrunner }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bap/default.nix b/pkgs/development/python-modules/bap/default.nix
index d2575afb77d2f..03abf67f86a09 100644
--- a/pkgs/development/python-modules/bap/default.nix
+++ b/pkgs/development/python-modules/bap/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, bap, requests}:
+{lib, buildPythonPackage, fetchFromGitHub, bap, requests}:
 
 buildPythonPackage rec {
   pname = "bap";
diff --git a/pkgs/development/python-modules/base58/default.nix b/pkgs/development/python-modules/base58/default.nix
index a36727429ca7d..1e1da32f6c9f8 100644
--- a/pkgs/development/python-modules/base58/default.nix
+++ b/pkgs/development/python-modules/base58/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, pytest, pyhamcrest }:
 
 buildPythonPackage rec {
   pname = "base58";
diff --git a/pkgs/development/python-modules/basemap/default.nix b/pkgs/development/python-modules/basemap/default.nix
index c97548bdee888..2fadda388ba07 100644
--- a/pkgs/development/python-modules/basemap/default.nix
+++ b/pkgs/development/python-modules/basemap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , numpy
diff --git a/pkgs/development/python-modules/batinfo/default.nix b/pkgs/development/python-modules/batinfo/default.nix
index 0ed3486272d35..17d28c129141a 100644
--- a/pkgs/development/python-modules/batinfo/default.nix
+++ b/pkgs/development/python-modules/batinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "batinfo";
diff --git a/pkgs/development/python-modules/bayespy/default.nix b/pkgs/development/python-modules/bayespy/default.nix
index b470d21b1bea1..6ebe9919ec9b9 100644
--- a/pkgs/development/python-modules/bayespy/default.nix
+++ b/pkgs/development/python-modules/bayespy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, nose, glibcLocales
 , numpy, scipy, matplotlib, h5py }:
 
diff --git a/pkgs/development/python-modules/bcdoc/default.nix b/pkgs/development/python-modules/bcdoc/default.nix
index 185fcb86b0b7a..29c267aa45fbe 100644
--- a/pkgs/development/python-modules/bcdoc/default.nix
+++ b/pkgs/development/python-modules/bcdoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, six }:
+{ lib, buildPythonPackage, fetchPypi, docutils, six }:
 
 buildPythonPackage rec {
   pname = "bcdoc";
diff --git a/pkgs/development/python-modules/bcrypt/3_1.nix b/pkgs/development/python-modules/bcrypt/3_1.nix
index c70161cf28b06..df57eb3cd0c97 100644
--- a/pkgs/development/python-modules/bcrypt/3_1.nix
+++ b/pkgs/development/python-modules/bcrypt/3_1.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, cffi, pytest, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bcrypt/default.nix b/pkgs/development/python-modules/bcrypt/default.nix
index e74b0934b308a..cfd17262a2b35 100644
--- a/pkgs/development/python-modules/bcrypt/default.nix
+++ b/pkgs/development/python-modules/bcrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, isPyPy, fetchPypi, pythonOlder
 , cffi, pycparser, mock, pytest, py, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/beancount/default.nix b/pkgs/development/python-modules/beancount/default.nix
index fa97c7c97a94a..e4a6a5f5625e1 100644
--- a/pkgs/development/python-modules/beancount/default.nix
+++ b/pkgs/development/python-modules/beancount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , beautifulsoup4, bottle, chardet, dateutil
 , google_api_python_client, lxml, oauth2client
 , ply, python_magic, pytest, requests }:
diff --git a/pkgs/development/python-modules/beanstalkc/default.nix b/pkgs/development/python-modules/beanstalkc/default.nix
index a74f6c6f8f28b..ffdb2f6f8f2a8 100644
--- a/pkgs/development/python-modules/beanstalkc/default.nix
+++ b/pkgs/development/python-modules/beanstalkc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "beanstalkc";
diff --git a/pkgs/development/python-modules/beautifulsoup4/default.nix b/pkgs/development/python-modules/beautifulsoup4/default.nix
index 555669da243ee..b00c03a09c148 100644
--- a/pkgs/development/python-modules/beautifulsoup4/default.nix
+++ b/pkgs/development/python-modules/beautifulsoup4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
+{ lib, buildPythonPackage, fetchPypi, soupsieve, pytest, python }:
 
 buildPythonPackage rec {
   pname = "beautifulsoup4";
diff --git a/pkgs/development/python-modules/bedup/default.nix b/pkgs/development/python-modules/bedup/default.nix
index f38d4263c2483..454a972f177b9 100644
--- a/pkgs/development/python-modules/bedup/default.nix
+++ b/pkgs/development/python-modules/bedup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , btrfs-progs
diff --git a/pkgs/development/python-modules/bellows/default.nix b/pkgs/development/python-modules/bellows/default.nix
index 6ee8b6499b581..d47c5d716a73a 100644
--- a/pkgs/development/python-modules/bellows/default.nix
+++ b/pkgs/development/python-modules/bellows/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, click-log, pure-pcapy3
 , pyserial-asyncio, voluptuous, zigpy
 , asynctest, pytestCheckHook, pytest-asyncio }:
diff --git a/pkgs/development/python-modules/bespon/default.nix b/pkgs/development/python-modules/bespon/default.nix
index 555a0a4875811..599ad71b2411c 100644
--- a/pkgs/development/python-modules/bespon/default.nix
+++ b/pkgs/development/python-modules/bespon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/betamax-matchers/default.nix b/pkgs/development/python-modules/betamax-matchers/default.nix
index 424b8ef4ef365..459d3c51d7edf 100644
--- a/pkgs/development/python-modules/betamax-matchers/default.nix
+++ b/pkgs/development/python-modules/betamax-matchers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, requests_toolbelt }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax-serializers/default.nix b/pkgs/development/python-modules/betamax-serializers/default.nix
index 3d3cad4d95b5c..0ddc9845bfa79 100644
--- a/pkgs/development/python-modules/betamax-serializers/default.nix
+++ b/pkgs/development/python-modules/betamax-serializers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , betamax, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/betamax/default.nix b/pkgs/development/python-modules/betamax/default.nix
index 5e1469bfc52df..5906a531f22d8 100644
--- a/pkgs/development/python-modules/betamax/default.nix
+++ b/pkgs/development/python-modules/betamax/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "betamax";
diff --git a/pkgs/development/python-modules/billiard/default.nix b/pkgs/development/python-modules/billiard/default.nix
index 4f8aa3565da26..2d4eabf215eab 100644
--- a/pkgs/development/python-modules/billiard/default.nix
+++ b/pkgs/development/python-modules/billiard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytestCheckHook, case, psutil, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "billiard";
diff --git a/pkgs/development/python-modules/binwalk/default.nix b/pkgs/development/python-modules/binwalk/default.nix
index c2f059dd93dc8..499d442c8224f 100644
--- a/pkgs/development/python-modules/binwalk/default.nix
+++ b/pkgs/development/python-modules/binwalk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , zlib
diff --git a/pkgs/development/python-modules/bitbucket-api/default.nix b/pkgs/development/python-modules/bitbucket-api/default.nix
index 559661bbb4f33..b874f1af525ae 100644
--- a/pkgs/development/python-modules/bitbucket-api/default.nix
+++ b/pkgs/development/python-modules/bitbucket-api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests_oauthlib, nose, sh }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/bitbucket-cli/default.nix b/pkgs/development/python-modules/bitbucket-cli/default.nix
index 50075fe70fce5..bb1fa1d6c17c1 100644
--- a/pkgs/development/python-modules/bitbucket-cli/default.nix
+++ b/pkgs/development/python-modules/bitbucket-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, requests }:
 
 buildPythonPackage rec {
   pname = "bitbucket-cli";
diff --git a/pkgs/development/python-modules/bitmath/default.nix b/pkgs/development/python-modules/bitmath/default.nix
index 49992c561f734..5643ea29bc2a4 100644
--- a/pkgs/development/python-modules/bitmath/default.nix
+++ b/pkgs/development/python-modules/bitmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, progressbar231, progressbar33, mock }:
 
 buildPythonPackage rec {
   pname = "bitmath";
diff --git a/pkgs/development/python-modules/bitstring/default.nix b/pkgs/development/python-modules/bitstring/default.nix
index d6eaf31056ff5..ed67f2be5c5f5 100644
--- a/pkgs/development/python-modules/bitstring/default.nix
+++ b/pkgs/development/python-modules/bitstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bitstring";
diff --git a/pkgs/development/python-modules/bjoern/default.nix b/pkgs/development/python-modules/bjoern/default.nix
index 2949ecbf6f929..ef599d89be2bc 100644
--- a/pkgs/development/python-modules/bjoern/default.nix
+++ b/pkgs/development/python-modules/bjoern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libev, python }:
+{ lib, buildPythonPackage, fetchPypi, libev, python }:
 
 buildPythonPackage rec {
   pname = "bjoern";
diff --git a/pkgs/development/python-modules/black-macchiato/default.nix b/pkgs/development/python-modules/black-macchiato/default.nix
index 536ad1f14b666..80aed4e6fef5c 100644
--- a/pkgs/development/python-modules/black-macchiato/default.nix
+++ b/pkgs/development/python-modules/black-macchiato/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/bleak/default.nix b/pkgs/development/python-modules/bleak/default.nix
index 06dc3217dc87d..38390e8377e96 100644
--- a/pkgs/development/python-modules/bleak/default.nix
+++ b/pkgs/development/python-modules/bleak/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, bluez, txdbus, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "bleak";
diff --git a/pkgs/development/python-modules/blessed/default.nix b/pkgs/development/python-modules/blessed/default.nix
index 7adacecc647a4..f0167625cf64d 100644
--- a/pkgs/development/python-modules/blessed/default.nix
+++ b/pkgs/development/python-modules/blessed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six
 , wcwidth, pytest, mock, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/blessings/default.nix b/pkgs/development/python-modules/blessings/default.nix
index 5263a92ec3d9f..00b7fd9a63d75 100644
--- a/pkgs/development/python-modules/blessings/default.nix
+++ b/pkgs/development/python-modules/blessings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/blinker/default.nix b/pkgs/development/python-modules/blinker/default.nix
index e33ad1626318a..5591113ab0ad6 100644
--- a/pkgs/development/python-modules/blinker/default.nix
+++ b/pkgs/development/python-modules/blinker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "blinker";
diff --git a/pkgs/development/python-modules/blis/default.nix b/pkgs/development/python-modules/blis/default.nix
index eeb62e8fed321..2b8aeb2edcd33 100644
--- a/pkgs/development/python-modules/blis/default.nix
+++ b/pkgs/development/python-modules/blis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/blist/default.nix b/pkgs/development/python-modules/blist/default.nix
index 505f01af5fe4a..d4dcb54c5cd14 100644
--- a/pkgs/development/python-modules/blist/default.nix
+++ b/pkgs/development/python-modules/blist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/blivet/default.nix b/pkgs/development/python-modules/blivet/default.nix
index 94abc39fd2854..fd97fa206480e 100644
--- a/pkgs/development/python-modules/blivet/default.nix
+++ b/pkgs/development/python-modules/blivet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
+{ lib, fetchFromGitHub, buildPythonPackage, pykickstart, pyparted, pyblock
 , pyudev, six, libselinux, multipath-tools, lsof, util-linux
 }:
 
diff --git a/pkgs/development/python-modules/block-io/default.nix b/pkgs/development/python-modules/block-io/default.nix
index 3a9704d71bc55..b823b8711a531 100644
--- a/pkgs/development/python-modules/block-io/default.nix
+++ b/pkgs/development/python-modules/block-io/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
+{ lib, fetchPypi, buildPythonPackage, base58, ecdsa, pycryptodome, requests, six, setuptools }:
 
 buildPythonPackage rec {
   pname = "block-io";
diff --git a/pkgs/development/python-modules/blockdiag/default.nix b/pkgs/development/python-modules/blockdiag/default.nix
index 5adc854d02632..f5d8b93c4816a 100644
--- a/pkgs/development/python-modules/blockdiag/default.nix
+++ b/pkgs/development/python-modules/blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools, funcparserlib, pillow, webcolors, reportlab, docutils
 }:
 
diff --git a/pkgs/development/python-modules/bluepy/default.nix b/pkgs/development/python-modules/bluepy/default.nix
index d833d20934d6d..11930050ba346 100644
--- a/pkgs/development/python-modules/bluepy/default.nix
+++ b/pkgs/development/python-modules/bluepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkg-config
diff --git a/pkgs/development/python-modules/boltons/default.nix b/pkgs/development/python-modules/boltons/default.nix
index 13e264340da12..f4842981c4a7b 100644
--- a/pkgs/development/python-modules/boltons/default.nix
+++ b/pkgs/development/python-modules/boltons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "boltons";
diff --git a/pkgs/development/python-modules/boltztrap2/default.nix b/pkgs/development/python-modules/boltztrap2/default.nix
index 48bc53bbeeda9..f80a8deb9ab44 100644
--- a/pkgs/development/python-modules/boltztrap2/default.nix
+++ b/pkgs/development/python-modules/boltztrap2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , spglib
diff --git a/pkgs/development/python-modules/bottle/default.nix b/pkgs/development/python-modules/bottle/default.nix
index 213d69dd98902..eeaf34a44ebc7 100644
--- a/pkgs/development/python-modules/bottle/default.nix
+++ b/pkgs/development/python-modules/bottle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "bottle";
diff --git a/pkgs/development/python-modules/box2d/default.nix b/pkgs/development/python-modules/box2d/default.nix
index 92ac90ab6d4d6..e6f6a390f3749 100644
--- a/pkgs/development/python-modules/box2d/default.nix
+++ b/pkgs/development/python-modules/box2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , swig2
diff --git a/pkgs/development/python-modules/bpython/default.nix b/pkgs/development/python-modules/bpython/default.nix
index 108d8ec0c66bf..8a37ed0bd9788 100644
--- a/pkgs/development/python-modules/bpython/default.nix
+++ b/pkgs/development/python-modules/bpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , curtsies
diff --git a/pkgs/development/python-modules/bsddb3/default.nix b/pkgs/development/python-modules/bsddb3/default.nix
index 9877a03a087e2..82459398ca731 100644
--- a/pkgs/development/python-modules/bsddb3/default.nix
+++ b/pkgs/development/python-modules/bsddb3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/bsdiff4/default.nix b/pkgs/development/python-modules/bsdiff4/default.nix
index f70f71c1a6990..339e649c53af7 100644
--- a/pkgs/development/python-modules/bsdiff4/default.nix
+++ b/pkgs/development/python-modules/bsdiff4/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aflplusplus
diff --git a/pkgs/development/python-modules/bt-proximity/default.nix b/pkgs/development/python-modules/bt-proximity/default.nix
index 209565fa21b7c..8ac1b977f392d 100644
--- a/pkgs/development/python-modules/bt-proximity/default.nix
+++ b/pkgs/development/python-modules/bt-proximity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pybluez }:
 
 buildPythonPackage {
diff --git a/pkgs/development/python-modules/btchip/default.nix b/pkgs/development/python-modules/btchip/default.nix
index ebb14a77b5644..3d206c829e8b6 100644
--- a/pkgs/development/python-modules/btchip/default.nix
+++ b/pkgs/development/python-modules/btchip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
+{ lib, buildPythonPackage, fetchPypi, hidapi, pyscard, ecdsa }:
 
 buildPythonPackage rec {
   pname = "btchip-python";
diff --git a/pkgs/development/python-modules/btrees/default.nix b/pkgs/development/python-modules/btrees/default.nix
index 471ba54215def..3da6852c54df0 100644
--- a/pkgs/development/python-modules/btrees/default.nix
+++ b/pkgs/development/python-modules/btrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , persistent
diff --git a/pkgs/development/python-modules/btrfs/default.nix b/pkgs/development/python-modules/btrfs/default.nix
index 8ea93fe005e7d..adaf1f610e35d 100644
--- a/pkgs/development/python-modules/btrfs/default.nix
+++ b/pkgs/development/python-modules/btrfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/bugsnag/default.nix b/pkgs/development/python-modules/bugsnag/default.nix
index 5e3b0b4e89f7b..3384536848062 100644
--- a/pkgs/development/python-modules/bugsnag/default.nix
+++ b/pkgs/development/python-modules/bugsnag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/bugwarrior/default.nix b/pkgs/development/python-modules/bugwarrior/default.nix
index 3d27384efe18b..c59d2196d2078 100644
--- a/pkgs/development/python-modules/bugwarrior/default.nix
+++ b/pkgs/development/python-modules/bugwarrior/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, setuptools
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, setuptools
 , twiggy, requests, offtrac, bugzilla, taskw, dateutil, pytz, keyring, six
 , jinja2, pycurl, dogpile_cache, lockfile, click, pyxdg, future, jira }:
 
diff --git a/pkgs/development/python-modules/bugz/default.nix b/pkgs/development/python-modules/bugz/default.nix
index 5324a43e1b0c1..a57e957efe676 100644
--- a/pkgs/development/python-modules/bugz/default.nix
+++ b/pkgs/development/python-modules/bugz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/bugzilla/default.nix b/pkgs/development/python-modules/bugzilla/default.nix
index fc122ecd233c6..365f365429858 100644
--- a/pkgs/development/python-modules/bugzilla/default.nix
+++ b/pkgs/development/python-modules/bugzilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pep8, coverage, logilab_common, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/buildout/default.nix b/pkgs/development/python-modules/buildout/default.nix
index 0751b284a7869..a9fe66a37ea2a 100644
--- a/pkgs/development/python-modules/buildout/default.nix
+++ b/pkgs/development/python-modules/buildout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "zc.buildout";
diff --git a/pkgs/development/python-modules/bumps/default.nix b/pkgs/development/python-modules/bumps/default.nix
index 05f082c747bd7..7e94bd55b28fb 100644
--- a/pkgs/development/python-modules/bumps/default.nix
+++ b/pkgs/development/python-modules/bumps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six}:
+{ lib, buildPythonPackage, fetchPypi, six}:
 
 buildPythonPackage rec {
   pname = "bumps";
diff --git a/pkgs/development/python-modules/bunch/default.nix b/pkgs/development/python-modules/bunch/default.nix
index ce77085e4f7f9..2758ff5b41859 100644
--- a/pkgs/development/python-modules/bunch/default.nix
+++ b/pkgs/development/python-modules/bunch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "bunch";
diff --git a/pkgs/development/python-modules/bwapy/default.nix b/pkgs/development/python-modules/bwapy/default.nix
index c736eb577d444..f6c926cf419aa 100644
--- a/pkgs/development/python-modules/bwapy/default.nix
+++ b/pkgs/development/python-modules/bwapy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/cachecontrol/default.nix b/pkgs/development/python-modules/cachecontrol/default.nix
index 53b13ddb56858..ba9b9022ac80d 100644
--- a/pkgs/development/python-modules/cachecontrol/default.nix
+++ b/pkgs/development/python-modules/cachecontrol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/cachelib/default.nix b/pkgs/development/python-modules/cachelib/default.nix
index 503b546116ef2..154c67bb379fc 100644
--- a/pkgs/development/python-modules/cachelib/default.nix
+++ b/pkgs/development/python-modules/cachelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cachelib";
diff --git a/pkgs/development/python-modules/cachetools/default.nix b/pkgs/development/python-modules/cachetools/default.nix
index 6fd3f637875d6..56efa9a348523 100644
--- a/pkgs/development/python-modules/cachetools/default.nix
+++ b/pkgs/development/python-modules/cachetools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "cachetools";
diff --git a/pkgs/development/python-modules/cairosvg/1_x.nix b/pkgs/development/python-modules/cairosvg/1_x.nix
index bb5629cf4e513..3e1a67f8282b5 100644
--- a/pkgs/development/python-modules/cairosvg/1_x.nix
+++ b/pkgs/development/python-modules/cairosvg/1_x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
+{ lib, buildPythonPackage, fetchFromGitHub, cairocffi, nose, fontconfig
 , cssselect2, defusedxml, pillow, tinycss2 }:
 
 # CairoSVG 2.x dropped support for Python 2 so offer CairoSVG 1.x as an
diff --git a/pkgs/development/python-modules/cairosvg/default.nix b/pkgs/development/python-modules/cairosvg/default.nix
index 9d1c54651c204..53f3ebc0c0881 100644
--- a/pkgs/development/python-modules/cairosvg/default.nix
+++ b/pkgs/development/python-modules/cairosvg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
 , cairocffi, cssselect2, defusedxml, pillow, tinycss2
 , pytest, pytestrunner, pytestcov, pytest-flake8, pytest-isort }:
 
diff --git a/pkgs/development/python-modules/canonicaljson/default.nix b/pkgs/development/python-modules/canonicaljson/default.nix
index 96af6f4bf78fc..4a4f56f5abf5c 100644
--- a/pkgs/development/python-modules/canonicaljson/default.nix
+++ b/pkgs/development/python-modules/canonicaljson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , frozendict, simplejson, six, isPy27
 }:
 
diff --git a/pkgs/development/python-modules/carbon/default.nix b/pkgs/development/python-modules/carbon/default.nix
index e0a31829b05fa..b651a654d5ece 100644
--- a/pkgs/development/python-modules/carbon/default.nix
+++ b/pkgs/development/python-modules/carbon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , twisted, whisper, txamqp, cachetools, urllib3
 }:
 
diff --git a/pkgs/development/python-modules/carrot/default.nix b/pkgs/development/python-modules/carrot/default.nix
index c2262decd314f..a772535ad82b6 100644
--- a/pkgs/development/python-modules/carrot/default.nix
+++ b/pkgs/development/python-modules/carrot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, amqplib, anyjson }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/case/default.nix b/pkgs/development/python-modules/case/default.nix
index 5d1a7696516a4..3f95d9e22afc0 100644
--- a/pkgs/development/python-modules/case/default.nix
+++ b/pkgs/development/python-modules/case/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, nose, unittest2, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 32cf844cf00c8..e1cb9f211bc2d 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, python, pythonOlder
 , cython
 , eventlet
 , futures
diff --git a/pkgs/development/python-modules/casttube/default.nix b/pkgs/development/python-modules/casttube/default.nix
index 85b1147c13a55..9d29a01374367 100644
--- a/pkgs/development/python-modules/casttube/default.nix
+++ b/pkgs/development/python-modules/casttube/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "casttube";
diff --git a/pkgs/development/python-modules/catalogue/default.nix b/pkgs/development/python-modules/catalogue/default.nix
index c4cd89cab68a3..a9c5bae71f4d2 100644
--- a/pkgs/development/python-modules/catalogue/default.nix
+++ b/pkgs/development/python-modules/catalogue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/cbor/default.nix b/pkgs/development/python-modules/cbor/default.nix
index f081511265fd3..cc3d8914ad2f6 100644
--- a/pkgs/development/python-modules/cbor/default.nix
+++ b/pkgs/development/python-modules/cbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cbor";
diff --git a/pkgs/development/python-modules/cccolutils/default.nix b/pkgs/development/python-modules/cccolutils/default.nix
index 96e75405ee3c5..e231624e40f8f 100644
--- a/pkgs/development/python-modules/cccolutils/default.nix
+++ b/pkgs/development/python-modules/cccolutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, krb5Full, nose, GitPython, mock, git }:
 
 buildPythonPackage rec {
   pname = "CCColUtils";
diff --git a/pkgs/development/python-modules/cement/default.nix b/pkgs/development/python-modules/cement/default.nix
index 9133389f0ce92..f021ea16b6205 100644
--- a/pkgs/development/python-modules/cement/default.nix
+++ b/pkgs/development/python-modules/cement/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "cement";
diff --git a/pkgs/development/python-modules/cerberus/default.nix b/pkgs/development/python-modules/cerberus/default.nix
index 08b7527c54c1f..cdf6519d325f1 100644
--- a/pkgs/development/python-modules/cerberus/default.nix
+++ b/pkgs/development/python-modules/cerberus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytestrunner, pytest }:
 
 buildPythonPackage rec {
   pname = "Cerberus";
diff --git a/pkgs/development/python-modules/certipy/default.nix b/pkgs/development/python-modules/certipy/default.nix
index 049e3ffdb5d92..a3cde807076f6 100644
--- a/pkgs/development/python-modules/certipy/default.nix
+++ b/pkgs/development/python-modules/certipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/cgroup-utils/default.nix b/pkgs/development/python-modules/cgroup-utils/default.nix
index 2000a4e0a3bc8..8b3a6afa9b36d 100644
--- a/pkgs/development/python-modules/cgroup-utils/default.nix
+++ b/pkgs/development/python-modules/cgroup-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pep8, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, pep8, nose }:
 
 buildPythonPackage rec {
   version = "0.8";
diff --git a/pkgs/development/python-modules/chai/default.nix b/pkgs/development/python-modules/chai/default.nix
index 3400b33635a8f..9f9d48d901713 100644
--- a/pkgs/development/python-modules/chai/default.nix
+++ b/pkgs/development/python-modules/chai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chai";
diff --git a/pkgs/development/python-modules/chainmap/default.nix b/pkgs/development/python-modules/chainmap/default.nix
index 3858fc44f234b..4619bff2b0469 100644
--- a/pkgs/development/python-modules/chainmap/default.nix
+++ b/pkgs/development/python-modules/chainmap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "chainmap";
diff --git a/pkgs/development/python-modules/chameleon/default.nix b/pkgs/development/python-modules/chameleon/default.nix
index a2ffcb9a0236a..fccfec53512ea 100644
--- a/pkgs/development/python-modules/chameleon/default.nix
+++ b/pkgs/development/python-modules/chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/channels-redis/default.nix b/pkgs/development/python-modules/channels-redis/default.nix
index 3f341f5527ae6..1e267aa512693 100644
--- a/pkgs/development/python-modules/channels-redis/default.nix
+++ b/pkgs/development/python-modules/channels-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , aioredis
 , asgiref
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/channels/default.nix b/pkgs/development/python-modules/channels/default.nix
index c2836ef4faa01..0f5e708d09134 100644
--- a/pkgs/development/python-modules/channels/default.nix
+++ b/pkgs/development/python-modules/channels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   asgiref, django, daphne
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/chardet/default.nix b/pkgs/development/python-modules/chardet/default.nix
index bbc41df0cd827..65381d40268f4 100644
--- a/pkgs/development/python-modules/chardet/default.nix
+++ b/pkgs/development/python-modules/chardet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/check-manifest/default.nix b/pkgs/development/python-modules/check-manifest/default.nix
index 8a2c748820669..95bb9660d4cfd 100644
--- a/pkgs/development/python-modules/check-manifest/default.nix
+++ b/pkgs/development/python-modules/check-manifest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
+{ lib, buildPythonPackage, fetchPypi, pep517, toml, mock, breezy, git, build }:
 
 buildPythonPackage rec {
   pname = "check-manifest";
diff --git a/pkgs/development/python-modules/cjson/default.nix b/pkgs/development/python-modules/cjson/default.nix
index ce70a2f459dac..d34534e3eb806 100644
--- a/pkgs/development/python-modules/cjson/default.nix
+++ b/pkgs/development/python-modules/cjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPyPy }:
 
 buildPythonPackage rec {
   pname = "python-cjson";
diff --git a/pkgs/development/python-modules/ckcc-protocol/default.nix b/pkgs/development/python-modules/ckcc-protocol/default.nix
index dd72f5705e70b..eaf89948e8f29 100644
--- a/pkgs/development/python-modules/ckcc-protocol/default.nix
+++ b/pkgs/development/python-modules/ckcc-protocol/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , click
 , ecdsa
 , hidapi
-, lib
 , fetchPypi
 , pytest
 , pyaes
diff --git a/pkgs/development/python-modules/clf/default.nix b/pkgs/development/python-modules/clf/default.nix
index f4168d689d446..978d08051f7d8 100644
--- a/pkgs/development/python-modules/clf/default.nix
+++ b/pkgs/development/python-modules/clf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, requests, pygments }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cliapp/default.nix b/pkgs/development/python-modules/cliapp/default.nix
index 4b7611c092e24..e410a37fcb42b 100644
--- a/pkgs/development/python-modules/cliapp/default.nix
+++ b/pkgs/development/python-modules/cliapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , sphinx
diff --git a/pkgs/development/python-modules/click-completion/default.nix b/pkgs/development/python-modules/click-completion/default.nix
index 61a154286325b..19fdac37615a3 100644
--- a/pkgs/development/python-modules/click-completion/default.nix
+++ b/pkgs/development/python-modules/click-completion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   click, jinja2, shellingham, six
 }:
 
diff --git a/pkgs/development/python-modules/click-didyoumean/default.nix b/pkgs/development/python-modules/click-didyoumean/default.nix
index 8d3c3ba3e240e..c4574072b4cae 100644
--- a/pkgs/development/python-modules/click-didyoumean/default.nix
+++ b/pkgs/development/python-modules/click-didyoumean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click
 }:
 
diff --git a/pkgs/development/python-modules/click-help-colors/default.nix b/pkgs/development/python-modules/click-help-colors/default.nix
index dbe4e33ca84c0..b17dc1a0c1112 100644
--- a/pkgs/development/python-modules/click-help-colors/default.nix
+++ b/pkgs/development/python-modules/click-help-colors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-log/default.nix b/pkgs/development/python-modules/click-log/default.nix
index 4aa63dd453780..3145d4775e397 100644
--- a/pkgs/development/python-modules/click-log/default.nix
+++ b/pkgs/development/python-modules/click-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click }:
+{ lib, buildPythonPackage, fetchPypi, click }:
 
 buildPythonPackage rec {
   pname = "click-log";
diff --git a/pkgs/development/python-modules/click-plugins/default.nix b/pkgs/development/python-modules/click-plugins/default.nix
index c2b25341e17cd..31ae00a348df9 100644
--- a/pkgs/development/python-modules/click-plugins/default.nix
+++ b/pkgs/development/python-modules/click-plugins/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   click, pytest
 }:
 
diff --git a/pkgs/development/python-modules/click-repl/default.nix b/pkgs/development/python-modules/click-repl/default.nix
index 23adb12da6582..ee8773999ff0d 100644
--- a/pkgs/development/python-modules/click-repl/default.nix
+++ b/pkgs/development/python-modules/click-repl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
+{ lib, buildPythonPackage, fetchPypi, click, prompt_toolkit }:
 
 buildPythonPackage rec {
   pname = "click-repl";
diff --git a/pkgs/development/python-modules/clickclick/default.nix b/pkgs/development/python-modules/clickclick/default.nix
index e211b955ac849..d829f43dc0d1d 100644
--- a/pkgs/development/python-modules/clickclick/default.nix
+++ b/pkgs/development/python-modules/clickclick/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy36, flake8, click, pyyaml, six, pytestCheckHook, pytestcov }:
 
 buildPythonPackage rec {
   pname = "clickclick";
diff --git a/pkgs/development/python-modules/cligj/default.nix b/pkgs/development/python-modules/cligj/default.nix
index f9d953d8536e1..b44f4e0ec1708 100644
--- a/pkgs/development/python-modules/cligj/default.nix
+++ b/pkgs/development/python-modules/cligj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, pytest, glibcLocales
 }:
 
diff --git a/pkgs/development/python-modules/clint/default.nix b/pkgs/development/python-modules/clint/default.nix
index 133fc0de55c62..66e2d5f52f382 100644
--- a/pkgs/development/python-modules/clint/default.nix
+++ b/pkgs/development/python-modules/clint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/clize/default.nix b/pkgs/development/python-modules/clize/default.nix
index c9c3f5c905cea..1418db69a3937 100644
--- a/pkgs/development/python-modules/clize/default.nix
+++ b/pkgs/development/python-modules/clize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dateutil
diff --git a/pkgs/development/python-modules/closure-linter/default.nix b/pkgs/development/python-modules/closure-linter/default.nix
index 75f5ba0b449ec..18782fb50bb1a 100644
--- a/pkgs/development/python-modules/closure-linter/default.nix
+++ b/pkgs/development/python-modules/closure-linter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/cloudpickle/default.nix b/pkgs/development/python-modules/cloudpickle/default.nix
index e5b4a63a564ea..f525b6e7f1dfd 100644
--- a/pkgs/development/python-modules/cloudpickle/default.nix
+++ b/pkgs/development/python-modules/cloudpickle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "cloudpickle";
diff --git a/pkgs/development/python-modules/clustershell/default.nix b/pkgs/development/python-modules/clustershell/default.nix
index a0e744f9919dc..d247cecdfa63f 100644
--- a/pkgs/development/python-modules/clustershell/default.nix
+++ b/pkgs/development/python-modules/clustershell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, openssh
+{ lib, buildPythonPackage, fetchPypi, pyyaml, openssh
 , nose, bc, hostname, coreutils, bash, gnused
 }:
 
diff --git a/pkgs/development/python-modules/cmdline/default.nix b/pkgs/development/python-modules/cmdline/default.nix
index 4249ed7164b9d..71273ed1a226d 100644
--- a/pkgs/development/python-modules/cmdline/default.nix
+++ b/pkgs/development/python-modules/cmdline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "cmdline";
diff --git a/pkgs/development/python-modules/cmdtest/default.nix b/pkgs/development/python-modules/cmdtest/default.nix
index 5bb4ef79a20c9..28d78203b6d40 100644
--- a/pkgs/development/python-modules/cmdtest/default.nix
+++ b/pkgs/development/python-modules/cmdtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , cliapp
diff --git a/pkgs/development/python-modules/cocotb/default.nix b/pkgs/development/python-modules/cocotb/default.nix
index e95900d17b527..9cbf86ab1cf20 100644
--- a/pkgs/development/python-modules/cocotb/default.nix
+++ b/pkgs/development/python-modules/cocotb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
 
 buildPythonPackage rec {
   pname = "cocotb";
diff --git a/pkgs/development/python-modules/cogapp/default.nix b/pkgs/development/python-modules/cogapp/default.nix
index 019faeaebc305..c996c23d9ae8d 100644
--- a/pkgs/development/python-modules/cogapp/default.nix
+++ b/pkgs/development/python-modules/cogapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cogapp";
diff --git a/pkgs/development/python-modules/coilmq/default.nix b/pkgs/development/python-modules/coilmq/default.nix
index bc0b6af146af8..b21ea193cbfa0 100644
--- a/pkgs/development/python-modules/coilmq/default.nix
+++ b/pkgs/development/python-modules/coilmq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , stompclient, python-daemon, redis, pid, pytest, six, click, coverage
 , sqlalchemy }:
 
diff --git a/pkgs/development/python-modules/colanderalchemy/default.nix b/pkgs/development/python-modules/colanderalchemy/default.nix
index a5b29af1c31a3..a3fa33f327c55 100644
--- a/pkgs/development/python-modules/colanderalchemy/default.nix
+++ b/pkgs/development/python-modules/colanderalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/colorama/default.nix b/pkgs/development/python-modules/colorama/default.nix
index 6778c6acadb8d..1d472035b2f2e 100644
--- a/pkgs/development/python-modules/colorama/default.nix
+++ b/pkgs/development/python-modules/colorama/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "colorama";
diff --git a/pkgs/development/python-modules/colorcet/default.nix b/pkgs/development/python-modules/colorcet/default.nix
index 303d244fff33e..6198e4e1b2813 100644
--- a/pkgs/development/python-modules/colorcet/default.nix
+++ b/pkgs/development/python-modules/colorcet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , param
diff --git a/pkgs/development/python-modules/colorclass/default.nix b/pkgs/development/python-modules/colorclass/default.nix
index 08da356e222ea..50a052ec1f942 100644
--- a/pkgs/development/python-modules/colorclass/default.nix
+++ b/pkgs/development/python-modules/colorclass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "colorclass";
diff --git a/pkgs/development/python-modules/colored/default.nix b/pkgs/development/python-modules/colored/default.nix
index 5caa0cad2f6fa..502f31aa9b8ed 100644
--- a/pkgs/development/python-modules/colored/default.nix
+++ b/pkgs/development/python-modules/colored/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/colour/default.nix b/pkgs/development/python-modules/colour/default.nix
index 6a6ad9d4946a3..f7419666f5359 100644
--- a/pkgs/development/python-modules/colour/default.nix
+++ b/pkgs/development/python-modules/colour/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, d2to1 }:
+{ lib, buildPythonPackage, fetchPypi, d2to1 }:
 
 buildPythonPackage rec {
   pname = "colour";
diff --git a/pkgs/development/python-modules/configobj/default.nix b/pkgs/development/python-modules/configobj/default.nix
index d0988689275e4..746c5f35f2568 100644
--- a/pkgs/development/python-modules/configobj/default.nix
+++ b/pkgs/development/python-modules/configobj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchFromGitHub
 , six
 , mock, pytest
diff --git a/pkgs/development/python-modules/configshell/default.nix b/pkgs/development/python-modules/configshell/default.nix
index ba3700962bf64..a41d077f22dfe 100644
--- a/pkgs/development/python-modules/configshell/default.nix
+++ b/pkgs/development/python-modules/configshell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
+{ lib, fetchFromGitHub, buildPythonPackage, pyparsing, six, urwid }:
 
 buildPythonPackage rec {
   pname = "configshell";
diff --git a/pkgs/development/python-modules/confluent-kafka/default.nix b/pkgs/development/python-modules/confluent-kafka/default.nix
index f3e8b1c943b1a..cd2ddf9da69a5 100644
--- a/pkgs/development/python-modules/confluent-kafka/default.nix
+++ b/pkgs/development/python-modules/confluent-kafka/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, rdkafka, requests, avro3k, avro, futures, enum34 }:
 
 buildPythonPackage rec {
   version = "1.5.0";
diff --git a/pkgs/development/python-modules/constantly/default.nix b/pkgs/development/python-modules/constantly/default.nix
index 189573699b915..e3a9c642f4780 100644
--- a/pkgs/development/python-modules/constantly/default.nix
+++ b/pkgs/development/python-modules/constantly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 buildPythonPackage rec {
   pname = "constantly";
diff --git a/pkgs/development/python-modules/consul/default.nix b/pkgs/development/python-modules/consul/default.nix
index 3978b14484ac8..a3b92ee725549 100644
--- a/pkgs/development/python-modules/consul/default.nix
+++ b/pkgs/development/python-modules/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, six, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/contexter/default.nix b/pkgs/development/python-modules/contexter/default.nix
index d8b74d4fedba1..9937d4b475262 100644
--- a/pkgs/development/python-modules/contexter/default.nix
+++ b/pkgs/development/python-modules/contexter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "contexter";
diff --git a/pkgs/development/python-modules/convertdate/default.nix b/pkgs/development/python-modules/convertdate/default.nix
index f28923002f70d..60eedd3ec1776 100644
--- a/pkgs/development/python-modules/convertdate/default.nix
+++ b/pkgs/development/python-modules/convertdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pymeeus, pytz }:
 
 buildPythonPackage rec {
   pname = "convertdate";
diff --git a/pkgs/development/python-modules/cookiecutter/default.nix b/pkgs/development/python-modules/cookiecutter/default.nix
index f9a4fe9820828..c5ee4d8617d0a 100644
--- a/pkgs/development/python-modules/cookiecutter/default.nix
+++ b/pkgs/development/python-modules/cookiecutter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , pytest, pytestcov, pytest-mock, freezegun
 , jinja2, future, binaryornot, click, whichcraft, poyo, jinja2_time, requests
 , python-slugify }:
diff --git a/pkgs/development/python-modules/cookies/default.nix b/pkgs/development/python-modules/cookies/default.nix
index 59d2214f758e6..a4e35dac346ae 100644
--- a/pkgs/development/python-modules/cookies/default.nix
+++ b/pkgs/development/python-modules/cookies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cookies";
diff --git a/pkgs/development/python-modules/coreapi/default.nix b/pkgs/development/python-modules/coreapi/default.nix
index 8ac69a457396e..8b957fee4f6e7 100644
--- a/pkgs/development/python-modules/coreapi/default.nix
+++ b/pkgs/development/python-modules/coreapi/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   django,
diff --git a/pkgs/development/python-modules/coreschema/default.nix b/pkgs/development/python-modules/coreschema/default.nix
index 73167dea8a7dd..65bdee5a8da97 100644
--- a/pkgs/development/python-modules/coreschema/default.nix
+++ b/pkgs/development/python-modules/coreschema/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   jinja2,
diff --git a/pkgs/development/python-modules/cornice/default.nix b/pkgs/development/python-modules/cornice/default.nix
index 10c559201931c..6c488a271e254 100644
--- a/pkgs/development/python-modules/cornice/default.nix
+++ b/pkgs/development/python-modules/cornice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/cov-core/default.nix b/pkgs/development/python-modules/cov-core/default.nix
index 44461a8ca9fb0..ce3b08fbc9f45 100644
--- a/pkgs/development/python-modules/cov-core/default.nix
+++ b/pkgs/development/python-modules/cov-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, coverage }:
+{ lib, buildPythonPackage, fetchPypi, coverage }:
 
 buildPythonPackage rec {
   pname = "cov-core";
diff --git a/pkgs/development/python-modules/cppheaderparser/default.nix b/pkgs/development/python-modules/cppheaderparser/default.nix
index b51499de449c9..7602132c24aea 100644
--- a/pkgs/development/python-modules/cppheaderparser/default.nix
+++ b/pkgs/development/python-modules/cppheaderparser/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , ply
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/crate/default.nix b/pkgs/development/python-modules/crate/default.nix
index 37e49210009ae..a37160a01acf5 100644
--- a/pkgs/development/python-modules/crate/default.nix
+++ b/pkgs/development/python-modules/crate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , urllib3
diff --git a/pkgs/development/python-modules/crayons/default.nix b/pkgs/development/python-modules/crayons/default.nix
index c93bf71687fb2..53caec6659647 100644
--- a/pkgs/development/python-modules/crayons/default.nix
+++ b/pkgs/development/python-modules/crayons/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, colorama }:
+{ lib, fetchPypi, buildPythonPackage, colorama }:
 
 buildPythonPackage rec {
   pname = "crayons";
diff --git a/pkgs/development/python-modules/crc16/default.nix b/pkgs/development/python-modules/crc16/default.nix
index 1e3c9cbbf4ff9..ebf86a3571c61 100644
--- a/pkgs/development/python-modules/crc16/default.nix
+++ b/pkgs/development/python-modules/crc16/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crc16";
diff --git a/pkgs/development/python-modules/crccheck/default.nix b/pkgs/development/python-modules/crccheck/default.nix
index 8dc0380128529..1762d60dfde5e 100644
--- a/pkgs/development/python-modules/crccheck/default.nix
+++ b/pkgs/development/python-modules/crccheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , nose }:
 
 let
diff --git a/pkgs/development/python-modules/crcmod/default.nix b/pkgs/development/python-modules/crcmod/default.nix
index 488b723d89fd4..082369baf73a0 100644
--- a/pkgs/development/python-modules/crcmod/default.nix
+++ b/pkgs/development/python-modules/crcmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "crcmod";
diff --git a/pkgs/development/python-modules/credstash/default.nix b/pkgs/development/python-modules/credstash/default.nix
index ca5e1fe334a03..0267aee761008 100644
--- a/pkgs/development/python-modules/credstash/default.nix
+++ b/pkgs/development/python-modules/credstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
+{ lib, buildPythonPackage, fetchPypi, cryptography, boto3, pyyaml, docutils, pytest, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "credstash";
diff --git a/pkgs/development/python-modules/cryptacular/default.nix b/pkgs/development/python-modules/cryptacular/default.nix
index dc97e96e4f5d9..dccfddaea1ae3 100644
--- a/pkgs/development/python-modules/cryptacular/default.nix
+++ b/pkgs/development/python-modules/cryptacular/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , coverage, nose, pbkdf2 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cssmin/default.nix b/pkgs/development/python-modules/cssmin/default.nix
index a6f6f3c956ae8..929640a7c1e84 100644
--- a/pkgs/development/python-modules/cssmin/default.nix
+++ b/pkgs/development/python-modules/cssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssmin";
diff --git a/pkgs/development/python-modules/cssselect/default.nix b/pkgs/development/python-modules/cssselect/default.nix
index fe13fa9582ea1..04b6dc36afab4 100644
--- a/pkgs/development/python-modules/cssselect/default.nix
+++ b/pkgs/development/python-modules/cssselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "cssselect";
diff --git a/pkgs/development/python-modules/cssutils/default.nix b/pkgs/development/python-modules/cssutils/default.nix
index ea3ac6236e90e..a12fbf48c8205 100644
--- a/pkgs/development/python-modules/cssutils/default.nix
+++ b/pkgs/development/python-modules/cssutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock }:
+{ lib, buildPythonPackage, fetchPypi, mock }:
 
 buildPythonPackage rec {
   pname = "cssutils";
diff --git a/pkgs/development/python-modules/cupy/default.nix b/pkgs/development/python-modules/cupy/default.nix
index 09685d392d6a4..23e6ef45b5030 100644
--- a/pkgs/development/python-modules/cupy/default.nix
+++ b/pkgs/development/python-modules/cupy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, isPy3k, linuxPackages
 , fastrlock, numpy, six, wheel, pytest, mock, setuptools
 , cudatoolkit, cudnn, nccl
diff --git a/pkgs/development/python-modules/curtsies/default.nix b/pkgs/development/python-modules/curtsies/default.nix
index 4c4c7dbe231a4..62f1435df30e9 100644
--- a/pkgs/development/python-modules/curtsies/default.nix
+++ b/pkgs/development/python-modules/curtsies/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, blessings, mock, nose, pyte, wcwidth, typing }:
 
 buildPythonPackage rec {
   pname = "curtsies";
diff --git a/pkgs/development/python-modules/curve25519-donna/default.nix b/pkgs/development/python-modules/curve25519-donna/default.nix
index e42f4021a6f2b..7698b5d657100 100644
--- a/pkgs/development/python-modules/curve25519-donna/default.nix
+++ b/pkgs/development/python-modules/curve25519-donna/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "curve25519-donna";
diff --git a/pkgs/development/python-modules/cvxopt/default.nix b/pkgs/development/python-modules/cvxopt/default.nix
index bafa75072f7ab..9270effcaa91f 100644
--- a/pkgs/development/python-modules/cvxopt/default.nix
+++ b/pkgs/development/python-modules/cvxopt/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/cx_freeze/default.nix b/pkgs/development/python-modules/cx_freeze/default.nix
index 14a585617c642..1c3ee68929904 100644
--- a/pkgs/development/python-modules/cx_freeze/default.nix
+++ b/pkgs/development/python-modules/cx_freeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, ncurses, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "cx_Freeze";
diff --git a/pkgs/development/python-modules/cx_oracle/default.nix b/pkgs/development/python-modules/cx_oracle/default.nix
index 89946964544ed..c81443e099086 100644
--- a/pkgs/development/python-modules/cx_oracle/default.nix
+++ b/pkgs/development/python-modules/cx_oracle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, odpic }:
+{ lib, buildPythonPackage, fetchPypi, odpic }:
 
 buildPythonPackage rec {
   pname = "cx_Oracle";
diff --git a/pkgs/development/python-modules/cymem/default.nix b/pkgs/development/python-modules/cymem/default.nix
index d805ba5de1f94..c2de6d82a5bcc 100644
--- a/pkgs/development/python-modules/cymem/default.nix
+++ b/pkgs/development/python-modules/cymem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cython
diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index 8a0adb3d6c964..a7115d1e940da 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/daemonize/default.nix b/pkgs/development/python-modules/daemonize/default.nix
index 30d4f1bd71468..26f23b7156ddf 100644
--- a/pkgs/development/python-modules/daemonize/default.nix
+++ b/pkgs/development/python-modules/daemonize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/darcsver/default.nix b/pkgs/development/python-modules/darcsver/default.nix
index 6484d84253b57..c46337981bd7b 100644
--- a/pkgs/development/python-modules/darcsver/default.nix
+++ b/pkgs/development/python-modules/darcsver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, mock }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, mock }:
 
 buildPythonPackage rec {
   pname = "darcsver";
diff --git a/pkgs/development/python-modules/dask-glm/default.nix b/pkgs/development/python-modules/dask-glm/default.nix
index 1db03b66ffb01..86bc2da1565cd 100644
--- a/pkgs/development/python-modules/dask-glm/default.nix
+++ b/pkgs/development/python-modules/dask-glm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cloudpickle
diff --git a/pkgs/development/python-modules/dask-image/default.nix b/pkgs/development/python-modules/dask-image/default.nix
index eac503c2f8556..a3cc7b6afda09 100644
--- a/pkgs/development/python-modules/dask-image/default.nix
+++ b/pkgs/development/python-modules/dask-image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/dask-jobqueue/default.nix b/pkgs/development/python-modules/dask-jobqueue/default.nix
index be27399b71f63..f4f5c03858ae2 100644
--- a/pkgs/development/python-modules/dask-jobqueue/default.nix
+++ b/pkgs/development/python-modules/dask-jobqueue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-ml/default.nix b/pkgs/development/python-modules/dask-ml/default.nix
index 4d3aa8e79a058..4836fe35d18b3 100644
--- a/pkgs/development/python-modules/dask-ml/default.nix
+++ b/pkgs/development/python-modules/dask-ml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dask-mpi/default.nix b/pkgs/development/python-modules/dask-mpi/default.nix
index f2d8737b38e98..1bec4c8287280 100644
--- a/pkgs/development/python-modules/dask-mpi/default.nix
+++ b/pkgs/development/python-modules/dask-mpi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dask
diff --git a/pkgs/development/python-modules/dask-xgboost/default.nix b/pkgs/development/python-modules/dask-xgboost/default.nix
index c60f628d72eb8..4e64b8c9f0c5d 100644
--- a/pkgs/development/python-modules/dask-xgboost/default.nix
+++ b/pkgs/development/python-modules/dask-xgboost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xgboost
diff --git a/pkgs/development/python-modules/databricks-cli/default.nix b/pkgs/development/python-modules/databricks-cli/default.nix
index 30001b781d283..483c565536d56 100644
--- a/pkgs/development/python-modules/databricks-cli/default.nix
+++ b/pkgs/development/python-modules/databricks-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , click
 , requests
 , tabulate
diff --git a/pkgs/development/python-modules/dataclasses/default.nix b/pkgs/development/python-modules/dataclasses/default.nix
index a88995937d838..c276e9d000b27 100644
--- a/pkgs/development/python-modules/dataclasses/default.nix
+++ b/pkgs/development/python-modules/dataclasses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy36 }:
+{ lib, buildPythonPackage, fetchPypi, isPy36 }:
 
 buildPythonPackage rec {
   pname = "dataclasses";
diff --git a/pkgs/development/python-modules/datadiff/default.nix b/pkgs/development/python-modules/datadiff/default.nix
index 6804623522758..4124457586ccf 100644
--- a/pkgs/development/python-modules/datadiff/default.nix
+++ b/pkgs/development/python-modules/datadiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/datamodeldict/default.nix b/pkgs/development/python-modules/datamodeldict/default.nix
index f3eab1d1d4e2b..551b109622241 100644
--- a/pkgs/development/python-modules/datamodeldict/default.nix
+++ b/pkgs/development/python-modules/datamodeldict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xmltodict
diff --git a/pkgs/development/python-modules/dateutil/default.nix b/pkgs/development/python-modules/dateutil/default.nix
index a6aca68ef2938..dcad0c3698a79 100644
--- a/pkgs/development/python-modules/dateutil/default.nix
+++ b/pkgs/development/python-modules/dateutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, setuptools_scm, pytest }:
 buildPythonPackage rec {
   pname = "python-dateutil";
   version = "2.8.1";
diff --git a/pkgs/development/python-modules/datrie/default.nix b/pkgs/development/python-modules/datrie/default.nix
index c7f74730c1619..d8bbc96fcc481 100644
--- a/pkgs/development/python-modules/datrie/default.nix
+++ b/pkgs/development/python-modules/datrie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , cython, pytest, pytestrunner, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dbf/default.nix b/pkgs/development/python-modules/dbf/default.nix
index b9c264a20150d..18560734bd853 100644
--- a/pkgs/development/python-modules/dbf/default.nix
+++ b/pkgs/development/python-modules/dbf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
+{ lib, fetchPypi, buildPythonPackage, aenum, isPy3k, pythonOlder, enum34, python }:
 
 buildPythonPackage rec {
     pname = "dbf";
diff --git a/pkgs/development/python-modules/dbfread/default.nix b/pkgs/development/python-modules/dbfread/default.nix
index 9f78f3fdde1b4..1708a75fc10e2 100644
--- a/pkgs/development/python-modules/dbfread/default.nix
+++ b/pkgs/development/python-modules/dbfread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
     pname = "dbfread";
diff --git a/pkgs/development/python-modules/dbus-next/default.nix b/pkgs/development/python-modules/dbus-next/default.nix
index 76385ac8023a5..d7cf79f9d07c3 100644
--- a/pkgs/development/python-modules/dbus-next/default.nix
+++ b/pkgs/development/python-modules/dbus-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/dbutils/default.nix b/pkgs/development/python-modules/dbutils/default.nix
index 42ae779e0d21a..848e5038af8d5 100644
--- a/pkgs/development/python-modules/dbutils/default.nix
+++ b/pkgs/development/python-modules/dbutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   version = "2.0";
diff --git a/pkgs/development/python-modules/dcmstack/default.nix b/pkgs/development/python-modules/dcmstack/default.nix
index a6669d0e30dfe..ee554a6e2bd76 100644
--- a/pkgs/development/python-modules/dcmstack/default.nix
+++ b/pkgs/development/python-modules/dcmstack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/deap/default.nix b/pkgs/development/python-modules/deap/default.nix
index 21dc9d3832c81..f260727b87a61 100644
--- a/pkgs/development/python-modules/deap/default.nix
+++ b/pkgs/development/python-modules/deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
+{ lib, buildPythonPackage, fetchPypi, python, numpy, matplotlib, nose }:
 
 buildPythonPackage rec {
   pname = "deap";
diff --git a/pkgs/development/python-modules/deluge-client/default.nix b/pkgs/development/python-modules/deluge-client/default.nix
index a271371e22fc7..4426fe65bf5e0 100644
--- a/pkgs/development/python-modules/deluge-client/default.nix
+++ b/pkgs/development/python-modules/deluge-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "deluge-client";
diff --git a/pkgs/development/python-modules/demjson/default.nix b/pkgs/development/python-modules/demjson/default.nix
index fc70562938ef5..25e2692af3ba2 100644
--- a/pkgs/development/python-modules/demjson/default.nix
+++ b/pkgs/development/python-modules/demjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, python, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "demjson";
diff --git a/pkgs/development/python-modules/dependency-injector/default.nix b/pkgs/development/python-modules/dependency-injector/default.nix
index 0c2e2055ff9f3..979d2811fe6ac 100644
--- a/pkgs/development/python-modules/dependency-injector/default.nix
+++ b/pkgs/development/python-modules/dependency-injector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, unittest2, pyyaml, flask }:
 
 let
   testPath =
diff --git a/pkgs/development/python-modules/deprecated/default.nix b/pkgs/development/python-modules/deprecated/default.nix
index a64ed0b9d9928..589335f8258d7 100644
--- a/pkgs/development/python-modules/deprecated/default.nix
+++ b/pkgs/development/python-modules/deprecated/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   wrapt, pytest, tox }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/derpconf/default.nix b/pkgs/development/python-modules/derpconf/default.nix
index f9b8f5dec7c0c..cc7b6870ad82b 100644
--- a/pkgs/development/python-modules/derpconf/default.nix
+++ b/pkgs/development/python-modules/derpconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "derpconf";
diff --git a/pkgs/development/python-modules/descartes/default.nix b/pkgs/development/python-modules/descartes/default.nix
index 5280ff2417aae..b10526ff0fd5a 100644
--- a/pkgs/development/python-modules/descartes/default.nix
+++ b/pkgs/development/python-modules/descartes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   matplotlib, shapely
 }:
 
diff --git a/pkgs/development/python-modules/deskcon/default.nix b/pkgs/development/python-modules/deskcon/default.nix
index 01918445b3421..43d5a955027c4 100644
--- a/pkgs/development/python-modules/deskcon/default.nix
+++ b/pkgs/development/python-modules/deskcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pyopenssl
 , pkgs
diff --git a/pkgs/development/python-modules/diff_cover/default.nix b/pkgs/development/python-modules/diff_cover/default.nix
index 9672cca46b05d..03b1f4fa28ee1 100644
--- a/pkgs/development/python-modules/diff_cover/default.nix
+++ b/pkgs/development/python-modules/diff_cover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , inflect
 , jinja2
 , jinja2_pluralize
diff --git a/pkgs/development/python-modules/digi-xbee/default.nix b/pkgs/development/python-modules/digi-xbee/default.nix
index ad653c6313c64..d5f1445a6771a 100644
--- a/pkgs/development/python-modules/digi-xbee/default.nix
+++ b/pkgs/development/python-modules/digi-xbee/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
+{ buildPythonPackage, fetchPypi, isPy27, pyserial, srp, lib }:
 
 buildPythonPackage rec {
   pname = "digi-xbee";
diff --git a/pkgs/development/python-modules/discogs_client/default.nix b/pkgs/development/python-modules/discogs_client/default.nix
index 5e3ac1e1fcde6..e522ac4b6c9d2 100644
--- a/pkgs/development/python-modules/discogs_client/default.nix
+++ b/pkgs/development/python-modules/discogs_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, oauthlib }:
+{ lib, buildPythonPackage, fetchPypi, requests, oauthlib }:
 
 buildPythonPackage rec {
   pname = "discogs-client";
diff --git a/pkgs/development/python-modules/distlib/default.nix b/pkgs/development/python-modules/distlib/default.nix
index 403834a3731c0..12e05b58c4c48 100644
--- a/pkgs/development/python-modules/distlib/default.nix
+++ b/pkgs/development/python-modules/distlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distlib";
diff --git a/pkgs/development/python-modules/distorm3/default.nix b/pkgs/development/python-modules/distorm3/default.nix
index e9b8e66d4c990..d798414c19746 100644
--- a/pkgs/development/python-modules/distorm3/default.nix
+++ b/pkgs/development/python-modules/distorm3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "distorm3";
diff --git a/pkgs/development/python-modules/distro/default.nix b/pkgs/development/python-modules/distro/default.nix
index 81bcccd8bd6c6..16d26e741aa99 100644
--- a/pkgs/development/python-modules/distro/default.nix
+++ b/pkgs/development/python-modules/distro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "distro";
diff --git a/pkgs/development/python-modules/distutils_extra/default.nix b/pkgs/development/python-modules/distutils_extra/default.nix
index 882a39957993c..c2fbcdfe46c94 100644
--- a/pkgs/development/python-modules/distutils_extra/default.nix
+++ b/pkgs/development/python-modules/distutils_extra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/dj-email-url/default.nix b/pkgs/development/python-modules/dj-email-url/default.nix
index f8dd9dca202c9..0cabbef1d15d4 100644
--- a/pkgs/development/python-modules/dj-email-url/default.nix
+++ b/pkgs/development/python-modules/dj-email-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/dj-search-url/default.nix b/pkgs/development/python-modules/dj-search-url/default.nix
index 321bec8149d12..b216c8e62a1ee 100644
--- a/pkgs/development/python-modules/dj-search-url/default.nix
+++ b/pkgs/development/python-modules/dj-search-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/django-allauth/default.nix b/pkgs/development/python-modules/django-allauth/default.nix
index fafd7ab9a63fe..143e76cf0d87b 100644
--- a/pkgs/development/python-modules/django-allauth/default.nix
+++ b/pkgs/development/python-modules/django-allauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchFromGitHub, requests, requests_oauthlib
 , django, python3-openid, mock, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-anymail/default.nix b/pkgs/development/python-modules/django-anymail/default.nix
index 892cf179c3704..96d5aa7fd9d98 100644
--- a/pkgs/development/python-modules/django-anymail/default.nix
+++ b/pkgs/development/python-modules/django-anymail/default.nix
@@ -1,5 +1,5 @@
 {
-    lib, stdenv,
+    lib,
     buildPythonPackage,
     fetchFromGitHub,
     six,
diff --git a/pkgs/development/python-modules/django-auth-ldap/default.nix b/pkgs/development/python-modules/django-auth-ldap/default.nix
index d0dacd659a15c..2271be1d16f4d 100644
--- a/pkgs/development/python-modules/django-auth-ldap/default.nix
+++ b/pkgs/development/python-modules/django-auth-ldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, isPy27
 , ldap , django
diff --git a/pkgs/development/python-modules/django-cache-url/default.nix b/pkgs/development/python-modules/django-cache-url/default.nix
index 103bfb29578d8..6487e276232be 100644
--- a/pkgs/development/python-modules/django-cache-url/default.nix
+++ b/pkgs/development/python-modules/django-cache-url/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/django-cleanup/default.nix b/pkgs/development/python-modules/django-cleanup/default.nix
index 39f65275feeda..83dbbc5d1974e 100644
--- a/pkgs/development/python-modules/django-cleanup/default.nix
+++ b/pkgs/development/python-modules/django-cleanup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django
+{ lib, buildPythonPackage, fetchPypi, django
 , redis, async-timeout, hiredis
 }:
 
diff --git a/pkgs/development/python-modules/django-compat/default.nix b/pkgs/development/python-modules/django-compat/default.nix
index ef18bfe77ec92..d33a4be2817f1 100644
--- a/pkgs/development/python-modules/django-compat/default.nix
+++ b/pkgs/development/python-modules/django-compat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, six
 }:
 
diff --git a/pkgs/development/python-modules/django-configurations/default.nix b/pkgs/development/python-modules/django-configurations/default.nix
index bf1835071f880..b6b736e92383e 100644
--- a/pkgs/development/python-modules/django-configurations/default.nix
+++ b/pkgs/development/python-modules/django-configurations/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django-discover-runner
diff --git a/pkgs/development/python-modules/django-csp/default.nix b/pkgs/development/python-modules/django-csp/default.nix
index d87e39b8e3f7d..1f7b281140540 100644
--- a/pkgs/development/python-modules/django-csp/default.nix
+++ b/pkgs/development/python-modules/django-csp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-csp";
diff --git a/pkgs/development/python-modules/django-discover-runner/default.nix b/pkgs/development/python-modules/django-discover-runner/default.nix
index 63d51d41fc935..8d07148ce1824 100644
--- a/pkgs/development/python-modules/django-discover-runner/default.nix
+++ b/pkgs/development/python-modules/django-discover-runner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-dynamic-preferences/default.nix b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
index 7288896c4fea0..7e5105807cfbe 100644
--- a/pkgs/development/python-modules/django-dynamic-preferences/default.nix
+++ b/pkgs/development/python-modules/django-dynamic-preferences/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django, persisting-theory, six
 }:
 
diff --git a/pkgs/development/python-modules/django-filter/default.nix b/pkgs/development/python-modules/django-filter/default.nix
index e4ca546bbc28c..00c260946cced 100644
--- a/pkgs/development/python-modules/django-filter/default.nix
+++ b/pkgs/development/python-modules/django-filter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-gravatar2/default.nix b/pkgs/development/python-modules/django-gravatar2/default.nix
index 083126066039e..458723601dd7f 100644
--- a/pkgs/development/python-modules/django-gravatar2/default.nix
+++ b/pkgs/development/python-modules/django-gravatar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-gravatar2";
diff --git a/pkgs/development/python-modules/django-hijack-admin/default.nix b/pkgs/development/python-modules/django-hijack-admin/default.nix
index 54056547f48ac..ee5a47d3787cb 100644
--- a/pkgs/development/python-modules/django-hijack-admin/default.nix
+++ b/pkgs/development/python-modules/django-hijack-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django_hijack, django_nose }:
 buildPythonPackage rec {
   pname = "django-hijack-admin";
diff --git a/pkgs/development/python-modules/django-hijack/default.nix b/pkgs/development/python-modules/django-hijack/default.nix
index bd6f870de66e4..fd9c30a4bc7cc 100644
--- a/pkgs/development/python-modules/django-hijack/default.nix
+++ b/pkgs/development/python-modules/django-hijack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python,
+{ lib, buildPythonPackage, fetchFromGitHub, python,
   django, django_compat, django_nose
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-logentry-admin/default.nix b/pkgs/development/python-modules/django-logentry-admin/default.nix
index 59e9782f05012..7bba272c155d3 100644
--- a/pkgs/development/python-modules/django-logentry-admin/default.nix
+++ b/pkgs/development/python-modules/django-logentry-admin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
+{ lib, fetchFromGitHub, buildPythonPackage, django, pytest, pytest-django }:
 
 buildPythonPackage rec {
   pname = "django-logentry-admin";
diff --git a/pkgs/development/python-modules/django-mailman3/default.nix b/pkgs/development/python-modules/django-mailman3/default.nix
index 40063c89e4329..11939b9b7739a 100644
--- a/pkgs/development/python-modules/django-mailman3/default.nix
+++ b/pkgs/development/python-modules/django-mailman3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
+{ lib, buildPythonPackage, fetchPypi, django-gravatar2, django_compressor
 , django-allauth, mailmanclient, django, mock
 }:
 
diff --git a/pkgs/development/python-modules/django-maintenance-mode/default.nix b/pkgs/development/python-modules/django-maintenance-mode/default.nix
index c599e28d2062e..b4d90da08808a 100644
--- a/pkgs/development/python-modules/django-maintenance-mode/default.nix
+++ b/pkgs/development/python-modules/django-maintenance-mode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest, django }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest, django }:
 
 buildPythonPackage rec {
   pname = "django-maintenance-mode";
diff --git a/pkgs/development/python-modules/django-oauth-toolkit/default.nix b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
index 6e16af5bc8f9d..e7cb4814cb48e 100644
--- a/pkgs/development/python-modules/django-oauth-toolkit/default.nix
+++ b/pkgs/development/python-modules/django-oauth-toolkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , django, requests, oauthlib
 }:
 
diff --git a/pkgs/development/python-modules/django-paintstore/default.nix b/pkgs/development/python-modules/django-paintstore/default.nix
index 4fed9bf470b26..8790067e4af0d 100644
--- a/pkgs/development/python-modules/django-paintstore/default.nix
+++ b/pkgs/development/python-modules/django-paintstore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, requests_oauthlib
+{ lib, buildPythonPackage, fetchPypi, requests, requests_oauthlib
 , django, python3-openid }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-polymorphic/default.nix b/pkgs/development/python-modules/django-polymorphic/default.nix
index b3b71231b75b8..4b8d79a2917eb 100644
--- a/pkgs/development/python-modules/django-polymorphic/default.nix
+++ b/pkgs/development/python-modules/django-polymorphic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, django, dj-database-url }:
 
 buildPythonPackage rec {
   pname = "django-polymorphic";
diff --git a/pkgs/development/python-modules/django-postgresql-netfields/default.nix b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
index f2bd574919aae..141a46f53154e 100644
--- a/pkgs/development/python-modules/django-postgresql-netfields/default.nix
+++ b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , django
 , netaddr
diff --git a/pkgs/development/python-modules/django-q/default.nix b/pkgs/development/python-modules/django-q/default.nix
index 2eb3b19f554bf..16b1e0bcc59f7 100644
--- a/pkgs/development/python-modules/django-q/default.nix
+++ b/pkgs/development/python-modules/django-q/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, django-picklefield, arrow
+{ lib, buildPythonPackage, fetchPypi, django-picklefield, arrow
 , blessed, django, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django-ranged-response/default.nix b/pkgs/development/python-modules/django-ranged-response/default.nix
index d517563590fb6..df5fc4b205b18 100644
--- a/pkgs/development/python-modules/django-ranged-response/default.nix
+++ b/pkgs/development/python-modules/django-ranged-response/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchPypi, buildPythonPackage, django }:
+{ lib, fetchurl, fetchPypi, buildPythonPackage, django }:
 
 buildPythonPackage rec {
   pname = "django-ranged-response";
diff --git a/pkgs/development/python-modules/django-raster/default.nix b/pkgs/development/python-modules/django-raster/default.nix
index 173452ebe484c..609388a311c80 100644
--- a/pkgs/development/python-modules/django-raster/default.nix
+++ b/pkgs/development/python-modules/django-raster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k,
+{ lib, buildPythonPackage, fetchPypi, isPy3k,
   numpy, django_colorful, pillow, psycopg2,
   pyparsing, django, celery, boto3, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/django-storages/default.nix b/pkgs/development/python-modules/django-storages/default.nix
index 869c3bf74eef0..6efba78d4ca55 100644
--- a/pkgs/development/python-modules/django-storages/default.nix
+++ b/pkgs/development/python-modules/django-storages/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django
 }:
 
diff --git a/pkgs/development/python-modules/django-versatileimagefield/default.nix b/pkgs/development/python-modules/django-versatileimagefield/default.nix
index 39912f474204d..4307fc69d4577 100644
--- a/pkgs/development/python-modules/django-versatileimagefield/default.nix
+++ b/pkgs/development/python-modules/django-versatileimagefield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django-webpack-loader/default.nix b/pkgs/development/python-modules/django-webpack-loader/default.nix
index e3e094ab706a2..3e849b4877391 100644
--- a/pkgs/development/python-modules/django-webpack-loader/default.nix
+++ b/pkgs/development/python-modules/django-webpack-loader/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "django-webpack-loader";
diff --git a/pkgs/development/python-modules/django-widget-tweaks/default.nix b/pkgs/development/python-modules/django-widget-tweaks/default.nix
index 8529df09bb76c..853e12327d327 100644
--- a/pkgs/development/python-modules/django-widget-tweaks/default.nix
+++ b/pkgs/development/python-modules/django-widget-tweaks/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchFromGitHub, python, lib, stdenv, django }:
+{ buildPythonPackage, fetchFromGitHub, python, lib, django }:
 
 buildPythonPackage rec {
   pname = "django-widget-tweaks";
diff --git a/pkgs/development/python-modules/django_appconf/default.nix b/pkgs/development/python-modules/django_appconf/default.nix
index c9c9913d76448..5da9ed0ca26da 100644
--- a/pkgs/development/python-modules/django_appconf/default.nix
+++ b/pkgs/development/python-modules/django_appconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, django, fetchpatch }:
 buildPythonPackage rec {
   pname = "django-appconf";
   version = "1.0.3";
diff --git a/pkgs/development/python-modules/django_classytags/default.nix b/pkgs/development/python-modules/django_classytags/default.nix
index e0a297e53c0cd..2ef8639c17e66 100644
--- a/pkgs/development/python-modules/django_classytags/default.nix
+++ b/pkgs/development/python-modules/django_classytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_colorful/default.nix b/pkgs/development/python-modules/django_colorful/default.nix
index 468327139e644..5de127a972211 100644
--- a/pkgs/development/python-modules/django_colorful/default.nix
+++ b/pkgs/development/python-modules/django_colorful/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_compressor/default.nix b/pkgs/development/python-modules/django_compressor/default.nix
index f00804364899f..edf5faa5af40b 100644
--- a/pkgs/development/python-modules/django_compressor/default.nix
+++ b/pkgs/development/python-modules/django_compressor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   rcssmin, rjsmin, django_appconf }:
 buildPythonPackage rec {
     pname = "django_compressor";
diff --git a/pkgs/development/python-modules/django_contrib_comments/default.nix b/pkgs/development/python-modules/django_contrib_comments/default.nix
index a8872967df4db..a452db3cf2810 100644
--- a/pkgs/development/python-modules/django_contrib_comments/default.nix
+++ b/pkgs/development/python-modules/django_contrib_comments/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_environ/default.nix b/pkgs/development/python-modules/django_environ/default.nix
index fa2618fa1a71f..3f01a2b294a1c 100644
--- a/pkgs/development/python-modules/django_environ/default.nix
+++ b/pkgs/development/python-modules/django_environ/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_evolution/default.nix b/pkgs/development/python-modules/django_evolution/default.nix
index dba92efb2d948..816442d6e2a82 100644
--- a/pkgs/development/python-modules/django_evolution/default.nix
+++ b/pkgs/development/python-modules/django_evolution/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/django_guardian/default.nix b/pkgs/development/python-modules/django_guardian/default.nix
index 60023660ea56e..957944f01d385 100644
--- a/pkgs/development/python-modules/django_guardian/default.nix
+++ b/pkgs/development/python-modules/django_guardian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , django_environ, mock, django
 , pytest, pytestrunner, pytest-django
 }:
diff --git a/pkgs/development/python-modules/django_modelcluster/default.nix b/pkgs/development/python-modules/django_modelcluster/default.nix
index 500fe2e2fbce0..fdd4bd03b7057 100644
--- a/pkgs/development/python-modules/django_modelcluster/default.nix
+++ b/pkgs/development/python-modules/django_modelcluster/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/django_nose/default.nix b/pkgs/development/python-modules/django_nose/default.nix
index 7f2f9efcfc5b0..2506f6aba44a9 100644
--- a/pkgs/development/python-modules/django_nose/default.nix
+++ b/pkgs/development/python-modules/django_nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/django_redis/default.nix b/pkgs/development/python-modules/django_redis/default.nix
index 434dea7f0f217..56e4e845f08cf 100644
--- a/pkgs/development/python-modules/django_redis/default.nix
+++ b/pkgs/development/python-modules/django_redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage,
+{ lib, fetchPypi, buildPythonPackage,
   mock, django, redis, msgpack }:
 buildPythonPackage rec {
   pname = "django-redis";
diff --git a/pkgs/development/python-modules/django_reversion/default.nix b/pkgs/development/python-modules/django_reversion/default.nix
index 16574770ff9eb..3f038b4fd06cb 100644
--- a/pkgs/development/python-modules/django_reversion/default.nix
+++ b/pkgs/development/python-modules/django_reversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/django_silk/default.nix b/pkgs/development/python-modules/django_silk/default.nix
index 66475b35d2a3c..90ba6cf2924e2 100644
--- a/pkgs/development/python-modules/django_silk/default.nix
+++ b/pkgs/development/python-modules/django_silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/django_taggit/default.nix b/pkgs/development/python-modules/django_taggit/default.nix
index e715dde7c41e9..b51f0421fd950 100644
--- a/pkgs/development/python-modules/django_taggit/default.nix
+++ b/pkgs/development/python-modules/django_taggit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/django_treebeard/default.nix b/pkgs/development/python-modules/django_treebeard/default.nix
index e734a5f7ae8e1..88536b210d2a1 100644
--- a/pkgs/development/python-modules/django_treebeard/default.nix
+++ b/pkgs/development/python-modules/django_treebeard/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/djangorestframework/default.nix b/pkgs/development/python-modules/djangorestframework/default.nix
index ce92fab3e9657..66a57625b4a93 100644
--- a/pkgs/development/python-modules/djangorestframework/default.nix
+++ b/pkgs/development/python-modules/djangorestframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, django, isPy27 }:
 
 buildPythonPackage rec {
   version = "3.12.2";
diff --git a/pkgs/development/python-modules/dkimpy/default.nix b/pkgs/development/python-modules/dkimpy/default.nix
index e7a80d91d24cb..aaaf5708a5939 100644
--- a/pkgs/development/python-modules/dkimpy/default.nix
+++ b/pkgs/development/python-modules/dkimpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, openssl, buildPythonPackage
+{ lib, fetchPypi, openssl, buildPythonPackage
 , pytest, dnspython, pynacl, authres, python }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/docker-pycreds/default.nix b/pkgs/development/python-modules/docker-pycreds/default.nix
index 543f4994020ca..c022d62bfa848 100644
--- a/pkgs/development/python-modules/docker-pycreds/default.nix
+++ b/pkgs/development/python-modules/docker-pycreds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "docker-pycreds";
diff --git a/pkgs/development/python-modules/dockerfile-parse/default.nix b/pkgs/development/python-modules/dockerfile-parse/default.nix
index 74e363d18b97e..45fe856f6f0d6 100644
--- a/pkgs/development/python-modules/dockerfile-parse/default.nix
+++ b/pkgs/development/python-modules/dockerfile-parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
+{ lib, buildPythonPackage, fetchPypi, six, pytestcov, pytest }:
 
 buildPythonPackage rec {
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/dockerpty/default.nix b/pkgs/development/python-modules/dockerpty/default.nix
index b6267b87c1bd1..775767e6fecfe 100644
--- a/pkgs/development/python-modules/dockerpty/default.nix
+++ b/pkgs/development/python-modules/dockerpty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "dockerpty";
diff --git a/pkgs/development/python-modules/docopt/default.nix b/pkgs/development/python-modules/docopt/default.nix
index 2dc4bb38cf148..68df40a3cbf24 100644
--- a/pkgs/development/python-modules/docopt/default.nix
+++ b/pkgs/development/python-modules/docopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "docopt";
diff --git a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
index 12d15799ecc62..533dbed29b342 100644
--- a/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
+++ b/pkgs/development/python-modules/doctest-ignore-unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "doctest-ignore-unicode";
diff --git a/pkgs/development/python-modules/dogpile.cache/default.nix b/pkgs/development/python-modules/dogpile.cache/default.nix
index 5dba1b91bc17b..92fae14f4ead9 100644
--- a/pkgs/development/python-modules/dogpile.cache/default.nix
+++ b/pkgs/development/python-modules/dogpile.cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/dogpile.core/default.nix b/pkgs/development/python-modules/dogpile.core/default.nix
index f6eabc378b3ba..8ef37282250de 100644
--- a/pkgs/development/python-modules/dogpile.core/default.nix
+++ b/pkgs/development/python-modules/dogpile.core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "dogpile.core";
diff --git a/pkgs/development/python-modules/dot2tex/default.nix b/pkgs/development/python-modules/dot2tex/default.nix
index 2626f420676a1..2154f33bb8ba8 100644
--- a/pkgs/development/python-modules/dot2tex/default.nix
+++ b/pkgs/development/python-modules/dot2tex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/dpath/default.nix b/pkgs/development/python-modules/dpath/default.nix
index 505bd7bb456c3..9db726a12a196 100644
--- a/pkgs/development/python-modules/dpath/default.nix
+++ b/pkgs/development/python-modules/dpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27
+{ lib, fetchPypi, buildPythonPackage, isPy27
 , mock, pytestCheckHook, nose, hypothesis
 }:
 
diff --git a/pkgs/development/python-modules/dpkt/default.nix b/pkgs/development/python-modules/dpkt/default.nix
index 177b260e8044f..52f4f42661d92 100644
--- a/pkgs/development/python-modules/dpkt/default.nix
+++ b/pkgs/development/python-modules/dpkt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "dpkt";
diff --git a/pkgs/development/python-modules/drf-yasg/default.nix b/pkgs/development/python-modules/drf-yasg/default.nix
index dd92d51d6c6b2..d69ece809bb9a 100644
--- a/pkgs/development/python-modules/drf-yasg/default.nix
+++ b/pkgs/development/python-modules/drf-yasg/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   buildPythonPackage,
   fetchPypi,
   inflection,
diff --git a/pkgs/development/python-modules/dropbox/default.nix b/pkgs/development/python-modules/dropbox/default.nix
index 22e66d0a4a434..ca0283b2cbdc3 100644
--- a/pkgs/development/python-modules/dropbox/default.nix
+++ b/pkgs/development/python-modules/dropbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytestrunner, requests, urllib3, mock, setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dtopt/default.nix b/pkgs/development/python-modules/dtopt/default.nix
index 84631c2170891..a5d4675f99309 100644
--- a/pkgs/development/python-modules/dtopt/default.nix
+++ b/pkgs/development/python-modules/dtopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dufte/default.nix b/pkgs/development/python-modules/dufte/default.nix
index d8435afa3f97d..f5e9fa6195a57 100644
--- a/pkgs/development/python-modules/dufte/default.nix
+++ b/pkgs/development/python-modules/dufte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/dyn/default.nix b/pkgs/development/python-modules/dyn/default.nix
index b5fa28f2de6b2..7cddb324f3a11 100644
--- a/pkgs/development/python-modules/dyn/default.nix
+++ b/pkgs/development/python-modules/dyn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestcov, mock
 , pytest_xdist, covCore, glibcLocales }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dynd/default.nix b/pkgs/development/python-modules/dynd/default.nix
index f23d19510ee79..9323255cc27c8 100644
--- a/pkgs/development/python-modules/dynd/default.nix
+++ b/pkgs/development/python-modules/dynd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , isPy3k
diff --git a/pkgs/development/python-modules/easygui/default.nix b/pkgs/development/python-modules/easygui/default.nix
index 441d839d36f69..322e6461e5d47 100644
--- a/pkgs/development/python-modules/easygui/default.nix
+++ b/pkgs/development/python-modules/easygui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "easygui";
diff --git a/pkgs/development/python-modules/easyprocess/default.nix b/pkgs/development/python-modules/easyprocess/default.nix
index fc86edf5d4d01..c98a8b572d454 100644
--- a/pkgs/development/python-modules/easyprocess/default.nix
+++ b/pkgs/development/python-modules/easyprocess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "EasyProcess";
diff --git a/pkgs/development/python-modules/easysnmp/default.nix b/pkgs/development/python-modules/easysnmp/default.nix
index d5c69d4c7e9d9..11b13d8325a0f 100644
--- a/pkgs/development/python-modules/easysnmp/default.nix
+++ b/pkgs/development/python-modules/easysnmp/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/ecdsa/default.nix b/pkgs/development/python-modules/ecdsa/default.nix
index 2a17f84bb3b4f..3c8921856876f 100644
--- a/pkgs/development/python-modules/ecdsa/default.nix
+++ b/pkgs/development/python-modules/ecdsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ed25519/default.nix b/pkgs/development/python-modules/ed25519/default.nix
index 183d7cc3ca554..47692075d3bc8 100644
--- a/pkgs/development/python-modules/ed25519/default.nix
+++ b/pkgs/development/python-modules/ed25519/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "ed25519";
diff --git a/pkgs/development/python-modules/editorconfig/default.nix b/pkgs/development/python-modules/editorconfig/default.nix
index 727c3003db5c9..4329db98c2bd8 100644
--- a/pkgs/development/python-modules/editorconfig/default.nix
+++ b/pkgs/development/python-modules/editorconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cmake
diff --git a/pkgs/development/python-modules/edward/default.nix b/pkgs/development/python-modules/edward/default.nix
index c1171043356a1..ac2d5023cc970 100644
--- a/pkgs/development/python-modules/edward/default.nix
+++ b/pkgs/development/python-modules/edward/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, isPy27, pythonAtLeast
 , Keras, numpy, scipy, six, tensorflow }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/eggdeps/default.nix b/pkgs/development/python-modules/eggdeps/default.nix
index ae339368ff5d9..02c2c6444493b 100644
--- a/pkgs/development/python-modules/eggdeps/default.nix
+++ b/pkgs/development/python-modules/eggdeps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/elasticsearch-dsl/default.nix b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
index 67e277b57ac4e..a2f2ff038db09 100644
--- a/pkgs/development/python-modules/elasticsearch-dsl/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/elasticsearch/default.nix b/pkgs/development/python-modules/elasticsearch/default.nix
index 4929d1f51a481..9161525c2bc6b 100644
--- a/pkgs/development/python-modules/elasticsearch/default.nix
+++ b/pkgs/development/python-modules/elasticsearch/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , urllib3, requests
 , nosexcover, mock
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage (rec {
diff --git a/pkgs/development/python-modules/eliot/default.nix b/pkgs/development/python-modules/eliot/default.nix
index 472834c5c7256..152561b69ceec 100644
--- a/pkgs/development/python-modules/eliot/default.nix
+++ b/pkgs/development/python-modules/eliot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/emcee/default.nix b/pkgs/development/python-modules/emcee/default.nix
index 12974a9422d6b..a4f2bece3497e 100644
--- a/pkgs/development/python-modules/emcee/default.nix
+++ b/pkgs/development/python-modules/emcee/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/emv/default.nix b/pkgs/development/python-modules/emv/default.nix
index 26d40d8d20527..f68729a42b62c 100644
--- a/pkgs/development/python-modules/emv/default.nix
+++ b/pkgs/development/python-modules/emv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , click, enum-compat, pyscard, pycountry, terminaltables
 , pytestCheckHook, pythonOlder
 }:
diff --git a/pkgs/development/python-modules/enum/default.nix b/pkgs/development/python-modules/enum/default.nix
index ad266623c78bb..db827601d5de5 100644
--- a/pkgs/development/python-modules/enum/default.nix
+++ b/pkgs/development/python-modules/enum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/enum34/default.nix b/pkgs/development/python-modules/enum34/default.nix
index 5e26853098fb0..91f54dc99cbf6 100644
--- a/pkgs/development/python-modules/enum34/default.nix
+++ b/pkgs/development/python-modules/enum34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/epc/default.nix b/pkgs/development/python-modules/epc/default.nix
index d74595431639c..3950afa578e97 100644
--- a/pkgs/development/python-modules/epc/default.nix
+++ b/pkgs/development/python-modules/epc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sexpdata
diff --git a/pkgs/development/python-modules/ephem/default.nix b/pkgs/development/python-modules/ephem/default.nix
index 4d6e594092666..c0d77c2974813 100644
--- a/pkgs/development/python-modules/ephem/default.nix
+++ b/pkgs/development/python-modules/ephem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , glibcLocales, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/et_xmlfile/default.nix b/pkgs/development/python-modules/et_xmlfile/default.nix
index 5ba9490d945a4..e407ca35e89b1 100644
--- a/pkgs/development/python-modules/et_xmlfile/default.nix
+++ b/pkgs/development/python-modules/et_xmlfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/etcd/default.nix b/pkgs/development/python-modules/etcd/default.nix
index 338992259a148..0c2fd0c2952d9 100644
--- a/pkgs/development/python-modules/etcd/default.nix
+++ b/pkgs/development/python-modules/etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , simplejson
diff --git a/pkgs/development/python-modules/eve/default.nix b/pkgs/development/python-modules/eve/default.nix
index b931db188e3ef..4d5c6173cd79f 100644
--- a/pkgs/development/python-modules/eve/default.nix
+++ b/pkgs/development/python-modules/eve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/eventlib/default.nix b/pkgs/development/python-modules/eventlib/default.nix
index 1b2b44d65f705..4d4bff85842a6 100644
--- a/pkgs/development/python-modules/eventlib/default.nix
+++ b/pkgs/development/python-modules/eventlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchdarcs
diff --git a/pkgs/development/python-modules/evernote/default.nix b/pkgs/development/python-modules/evernote/default.nix
index 70c7fad963af6..8c6e4b6c7c275 100644
--- a/pkgs/development/python-modules/evernote/default.nix
+++ b/pkgs/development/python-modules/evernote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/exchangelib/default.nix b/pkgs/development/python-modules/exchangelib/default.nix
index e380ca613cfdb..706e4d8137fef 100644
--- a/pkgs/development/python-modules/exchangelib/default.nix
+++ b/pkgs/development/python-modules/exchangelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage,
+{ lib, fetchFromGitHub, buildPythonPackage,
   pythonOlder,
   lxml, tzlocal, python-dateutil, pygments, requests-kerberos,
   defusedxml, cached-property, isodate, requests_ntlm, dnspython,
diff --git a/pkgs/development/python-modules/execnet/default.nix b/pkgs/development/python-modules/execnet/default.nix
index 0a22ab4b0516c..ec4bcca9f86a3 100644
--- a/pkgs/development/python-modules/execnet/default.nix
+++ b/pkgs/development/python-modules/execnet/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , isPyPy
 , fetchPypi
diff --git a/pkgs/development/python-modules/exifread/default.nix b/pkgs/development/python-modules/exifread/default.nix
index e86a681a8e391..e26f616f8db9c 100644
--- a/pkgs/development/python-modules/exifread/default.nix
+++ b/pkgs/development/python-modules/exifread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/eyed3/default.nix b/pkgs/development/python-modules/eyed3/default.nix
index 08faf5c2ba847..3dfd810f99cba 100644
--- a/pkgs/development/python-modules/eyed3/default.nix
+++ b/pkgs/development/python-modules/eyed3/default.nix
@@ -1,11 +1,10 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
 , python
 , isPyPy
 , six
-, lib
 , filetype
 , deprecation
 , dataclasses
diff --git a/pkgs/development/python-modules/ezdxf/default.nix b/pkgs/development/python-modules/ezdxf/default.nix
index 6dfefe092040e..3fd30062b0d9d 100644
--- a/pkgs/development/python-modules/ezdxf/default.nix
+++ b/pkgs/development/python-modules/ezdxf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pyparsing, pytest }:
 
 buildPythonPackage rec {
   version = "0.12";
diff --git a/pkgs/development/python-modules/face/default.nix b/pkgs/development/python-modules/face/default.nix
index 89e7156fa5242..db1810ca056d5 100644
--- a/pkgs/development/python-modules/face/default.nix
+++ b/pkgs/development/python-modules/face/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, boltons, pytest }:
+{ lib, buildPythonPackage, fetchPypi, boltons, pytest }:
 
 buildPythonPackage rec {
   pname = "face";
diff --git a/pkgs/development/python-modules/face_recognition/default.nix b/pkgs/development/python-modules/face_recognition/default.nix
index 1896bdfac592b..6b2c6411aa1f6 100644
--- a/pkgs/development/python-modules/face_recognition/default.nix
+++ b/pkgs/development/python-modules/face_recognition/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage, fetchFromGitHub, pillow, click, dlib, numpy
-, face_recognition_models, lib, stdenv, flake8, pytest, glibcLocales
+, face_recognition_models, lib, flake8, pytest, glibcLocales
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/face_recognition_models/default.nix b/pkgs/development/python-modules/face_recognition_models/default.nix
index d5838438b7d90..6ec2634029b37 100644
--- a/pkgs/development/python-modules/face_recognition_models/default.nix
+++ b/pkgs/development/python-modules/face_recognition_models/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi, setuptools }:
+{ buildPythonPackage, lib, fetchPypi, setuptools }:
 
 buildPythonPackage rec {
   pname = "face_recognition_models";
diff --git a/pkgs/development/python-modules/fake-useragent/default.nix b/pkgs/development/python-modules/fake-useragent/default.nix
index be26ab98af628..9b207a81c3c73 100644
--- a/pkgs/development/python-modules/fake-useragent/default.nix
+++ b/pkgs/development/python-modules/fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six, pytest }:
+{ lib, fetchPypi, buildPythonPackage, six, pytest }:
 
 buildPythonPackage rec {
   pname = "fake-useragent";
diff --git a/pkgs/development/python-modules/fake_factory/default.nix b/pkgs/development/python-modules/fake_factory/default.nix
index 82af8d04e077e..2e561a163ab54 100644
--- a/pkgs/development/python-modules/fake_factory/default.nix
+++ b/pkgs/development/python-modules/fake_factory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/falcon/default.nix b/pkgs/development/python-modules/falcon/default.nix
index 8d1aa02026c1c..eb6cbfa242e11 100644
--- a/pkgs/development/python-modules/falcon/default.nix
+++ b/pkgs/development/python-modules/falcon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/fasteners/default.nix b/pkgs/development/python-modules/fasteners/default.nix
index 57ad69c0be418..55b9d3b3023f6 100644
--- a/pkgs/development/python-modules/fasteners/default.nix
+++ b/pkgs/development/python-modules/fasteners/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/fastentrypoints/default.nix b/pkgs/development/python-modules/fastentrypoints/default.nix
index eb86784ddc7b8..7671feb359f8f 100644
--- a/pkgs/development/python-modules/fastentrypoints/default.nix
+++ b/pkgs/development/python-modules/fastentrypoints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastentrypoints";
diff --git a/pkgs/development/python-modules/fastimport/default.nix b/pkgs/development/python-modules/fastimport/default.nix
index 55aad9d71ea5b..383a0e4fbd58b 100644
--- a/pkgs/development/python-modules/fastimport/default.nix
+++ b/pkgs/development/python-modules/fastimport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi}:
+{ lib, buildPythonPackage, python, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "fastimport";
diff --git a/pkgs/development/python-modules/fastpair/default.nix b/pkgs/development/python-modules/fastpair/default.nix
index 82964070d03bd..9a3f8c53b1d34 100644
--- a/pkgs/development/python-modules/fastpair/default.nix
+++ b/pkgs/development/python-modules/fastpair/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, pytest, scipy }:
 
 buildPythonPackage {
   pname = "fastpair";
diff --git a/pkgs/development/python-modules/fastpbkdf2/default.nix b/pkgs/development/python-modules/fastpbkdf2/default.nix
index e033dc42d4575..e154471d7a881 100644
--- a/pkgs/development/python-modules/fastpbkdf2/default.nix
+++ b/pkgs/development/python-modules/fastpbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage
+{ lib, fetchFromGitHub, buildPythonPackage
 , openssl, pytest, cffi, six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/fastprogress/default.nix b/pkgs/development/python-modules/fastprogress/default.nix
index 25cc2b8792f70..9b43c05989f68 100644
--- a/pkgs/development/python-modules/fastprogress/default.nix
+++ b/pkgs/development/python-modules/fastprogress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fastrlock/default.nix b/pkgs/development/python-modules/fastrlock/default.nix
index 7aedbbdd8f7c6..0821778d024fd 100644
--- a/pkgs/development/python-modules/fastrlock/default.nix
+++ b/pkgs/development/python-modules/fastrlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastrlock";
diff --git a/pkgs/development/python-modules/fasttext/default.nix b/pkgs/development/python-modules/fasttext/default.nix
index bf3bd987564ab..f3bddec76bd3f 100644
--- a/pkgs/development/python-modules/fasttext/default.nix
+++ b/pkgs/development/python-modules/fasttext/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
+{lib, buildPythonPackage, fetchFromGitHub, numpy, pkgs, pybind11 }:
 
 buildPythonPackage rec {
   inherit (pkgs.fasttext) pname version src;
diff --git a/pkgs/development/python-modules/fdint/default.nix b/pkgs/development/python-modules/fdint/default.nix
index 4de0d18ca8b7f..413416c99a252 100644
--- a/pkgs/development/python-modules/fdint/default.nix
+++ b/pkgs/development/python-modules/fdint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/feedgen/default.nix b/pkgs/development/python-modules/feedgen/default.nix
index 509ffaed9d71c..59ca95a0338ab 100644
--- a/pkgs/development/python-modules/feedgen/default.nix
+++ b/pkgs/development/python-modules/feedgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, lxml }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, lxml }:
 
 buildPythonPackage rec {
   pname = "feedgen";
diff --git a/pkgs/development/python-modules/feedgenerator/default.nix b/pkgs/development/python-modules/feedgenerator/default.nix
index 8508cc637f225..d5eb1306b3986 100644
--- a/pkgs/development/python-modules/feedgenerator/default.nix
+++ b/pkgs/development/python-modules/feedgenerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
+{ lib, buildPythonPackage, glibcLocales, fetchPypi, six, pytz }:
 
 buildPythonPackage rec {
   pname = "feedgenerator";
diff --git a/pkgs/development/python-modules/feedparser/5.nix b/pkgs/development/python-modules/feedparser/5.nix
index a79048c55254f..58cdad9884e93 100644
--- a/pkgs/development/python-modules/feedparser/5.nix
+++ b/pkgs/development/python-modules/feedparser/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/feedparser/default.nix b/pkgs/development/python-modules/feedparser/default.nix
index 7b48fe6f73e5c..38e9761952d68 100644
--- a/pkgs/development/python-modules/feedparser/default.nix
+++ b/pkgs/development/python-modules/feedparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/filebrowser_safe/default.nix b/pkgs/development/python-modules/filebrowser_safe/default.nix
index df132211d4f9c..0cc1eae5ac20c 100644
--- a/pkgs/development/python-modules/filebrowser_safe/default.nix
+++ b/pkgs/development/python-modules/filebrowser_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/filebytes/default.nix b/pkgs/development/python-modules/filebytes/default.nix
index bfac6a0e6b234..5b6d6284ced5e 100644
--- a/pkgs/development/python-modules/filebytes/default.nix
+++ b/pkgs/development/python-modules/filebytes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/filelock/default.nix b/pkgs/development/python-modules/filelock/default.nix
index 77ddec306fc29..97073bb6b03bd 100644
--- a/pkgs/development/python-modules/filelock/default.nix
+++ b/pkgs/development/python-modules/filelock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "filelock";
diff --git a/pkgs/development/python-modules/filterpy/default.nix b/pkgs/development/python-modules/filterpy/default.nix
index 53059ce43d051..9740117b9b925 100644
--- a/pkgs/development/python-modules/filterpy/default.nix
+++ b/pkgs/development/python-modules/filterpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/fints/default.nix b/pkgs/development/python-modules/fints/default.nix
index 8e02dac585087..c4dfc04046b71 100644
--- a/pkgs/development/python-modules/fints/default.nix
+++ b/pkgs/development/python-modules/fints/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , bleach
 , mt-940
 , pytest
diff --git a/pkgs/development/python-modules/fire/default.nix b/pkgs/development/python-modules/fire/default.nix
index 6a2cc594360de..54f22032c6a46 100644
--- a/pkgs/development/python-modules/fire/default.nix
+++ b/pkgs/development/python-modules/fire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, six, hypothesis, mock
 , python-Levenshtein, pytest, termcolor, isPy27, enum34 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/first/default.nix b/pkgs/development/python-modules/first/default.nix
index a5bdf847eff2d..491fcd3980530 100644
--- a/pkgs/development/python-modules/first/default.nix
+++ b/pkgs/development/python-modules/first/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "first";
diff --git a/pkgs/development/python-modules/flake8/default.nix b/pkgs/development/python-modules/flake8/default.nix
index 9e53ed28ff34a..6f1d8181a5839 100644
--- a/pkgs/development/python-modules/flake8/default.nix
+++ b/pkgs/development/python-modules/flake8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , mock, pytest, pytestrunner
 , configparser, enum34, mccabe, pycodestyle, pyflakes, functools32, typing, importlib-metadata
 }:
diff --git a/pkgs/development/python-modules/flaky/default.nix b/pkgs/development/python-modules/flaky/default.nix
index 02b0641a34e27..fe068211dfbf4 100644
--- a/pkgs/development/python-modules/flaky/default.nix
+++ b/pkgs/development/python-modules/flaky/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/flask-babel/default.nix b/pkgs/development/python-modules/flask-babel/default.nix
index da6176e6781f9..602564d162689 100644
--- a/pkgs/development/python-modules/flask-babel/default.nix
+++ b/pkgs/development/python-modules/flask-babel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchPypi
diff --git a/pkgs/development/python-modules/flask-common/default.nix b/pkgs/development/python-modules/flask-common/default.nix
index 7dbf507f22050..cba8e9e8efd45 100644
--- a/pkgs/development/python-modules/flask-common/default.nix
+++ b/pkgs/development/python-modules/flask-common/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , crayons, flask, flask-caching, gunicorn, maya, meinheld, whitenoise }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-compress/default.nix b/pkgs/development/python-modules/flask-compress/default.nix
index 9491ca8be779f..1e133df2b2bb0 100644
--- a/pkgs/development/python-modules/flask-compress/default.nix
+++ b/pkgs/development/python-modules/flask-compress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask
+{ lib, fetchPypi, buildPythonPackage, flask
 , brotli
 }:
 
diff --git a/pkgs/development/python-modules/flask-cors/default.nix b/pkgs/development/python-modules/flask-cors/default.nix
index 731e8b106ab79..25c054b231bb4 100644
--- a/pkgs/development/python-modules/flask-cors/default.nix
+++ b/pkgs/development/python-modules/flask-cors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, flask, six, packaging }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-elastic/default.nix b/pkgs/development/python-modules/flask-elastic/default.nix
index 6986cd75be69b..3a9daa577d4dc 100644
--- a/pkgs/development/python-modules/flask-elastic/default.nix
+++ b/pkgs/development/python-modules/flask-elastic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, elasticsearch }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-jwt-extended/default.nix b/pkgs/development/python-modules/flask-jwt-extended/default.nix
index cf8a70b05330a..580cd1f89f7b6 100644
--- a/pkgs/development/python-modules/flask-jwt-extended/default.nix
+++ b/pkgs/development/python-modules/flask-jwt-extended/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
+{ lib, buildPythonPackage, fetchPypi, dateutil, flask, pyjwt, werkzeug, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-JWT-Extended";
diff --git a/pkgs/development/python-modules/flask-ldap-login/default.nix b/pkgs/development/python-modules/flask-ldap-login/default.nix
index 1673ca24e6e0f..08aa2efb8f2ce 100644
--- a/pkgs/development/python-modules/flask-ldap-login/default.nix
+++ b/pkgs/development/python-modules/flask-ldap-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch
 , flask, flask_wtf, flask_testing, ldap
 , mock, nose }:
 
diff --git a/pkgs/development/python-modules/flask-limiter/default.nix b/pkgs/development/python-modules/flask-limiter/default.nix
index 38d42da1c8a72..d22096f914943 100644
--- a/pkgs/development/python-modules/flask-limiter/default.nix
+++ b/pkgs/development/python-modules/flask-limiter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, limits }:
+{ lib, fetchPypi, buildPythonPackage, flask, limits }:
 
 buildPythonPackage rec {
   pname = "Flask-Limiter";
diff --git a/pkgs/development/python-modules/flask-login/default.nix b/pkgs/development/python-modules/flask-login/default.nix
index 919e353eb8e0f..9d54849e92d97 100644
--- a/pkgs/development/python-modules/flask-login/default.nix
+++ b/pkgs/development/python-modules/flask-login/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , flask, blinker, nose, mock, semantic-version }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
index 550f6520e7dba..18e483292885b 100644
--- a/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
+++ b/pkgs/development/python-modules/flask-reverse-proxy-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/flask-silk/default.nix b/pkgs/development/python-modules/flask-silk/default.nix
index 92d2f90848cbe..f6b6fd81528f1 100644
--- a/pkgs/development/python-modules/flask-silk/default.nix
+++ b/pkgs/development/python-modules/flask-silk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , flask
diff --git a/pkgs/development/python-modules/flask-sqlalchemy/default.nix b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
index 16b8c9c7fc79e..1bac82fb44f6b 100644
--- a/pkgs/development/python-modules/flask-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-SQLAlchemy";
diff --git a/pkgs/development/python-modules/flask-swagger-ui/default.nix b/pkgs/development/python-modules/flask-swagger-ui/default.nix
index 79650e7c17553..d238ba5acb752 100644
--- a/pkgs/development/python-modules/flask-swagger-ui/default.nix
+++ b/pkgs/development/python-modules/flask-swagger-ui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flask }:
+{ lib, buildPythonPackage, fetchPypi, flask }:
 
 buildPythonPackage rec {
   pname = "flask-swagger-ui";
diff --git a/pkgs/development/python-modules/flask-swagger/default.nix b/pkgs/development/python-modules/flask-swagger/default.nix
index 20624c3186208..66c45b855223c 100644
--- a/pkgs/development/python-modules/flask-swagger/default.nix
+++ b/pkgs/development/python-modules/flask-swagger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , flask, pyyaml }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flask-versioned/default.nix b/pkgs/development/python-modules/flask-versioned/default.nix
index 15e7b2c1875d2..e30abdb7cb448 100644
--- a/pkgs/development/python-modules/flask-versioned/default.nix
+++ b/pkgs/development/python-modules/flask-versioned/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flask }:
+{ lib, buildPythonPackage, fetchFromGitHub, flask }:
 
 buildPythonPackage rec {
   pname = "Flask-Versioned";
diff --git a/pkgs/development/python-modules/flask-wtf/default.nix b/pkgs/development/python-modules/flask-wtf/default.nix
index eadc7842a013a..00af0ce61e9aa 100644
--- a/pkgs/development/python-modules/flask-wtf/default.nix
+++ b/pkgs/development/python-modules/flask-wtf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
+{ lib, fetchPypi, buildPythonPackage, flask, wtforms, nose }:
 
 buildPythonPackage rec {
   pname = "Flask-WTF";
diff --git a/pkgs/development/python-modules/flask/default.nix b/pkgs/development/python-modules/flask/default.nix
index d121b4e32c8b5..27f436c3c53cb 100644
--- a/pkgs/development/python-modules/flask/default.nix
+++ b/pkgs/development/python-modules/flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , itsdangerous, click, werkzeug, jinja2, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flaskbabel/default.nix b/pkgs/development/python-modules/flaskbabel/default.nix
index eef31359f504e..d15950bba9a4a 100644
--- a/pkgs/development/python-modules/flaskbabel/default.nix
+++ b/pkgs/development/python-modules/flaskbabel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , flask
diff --git a/pkgs/development/python-modules/flowlogs_reader/default.nix b/pkgs/development/python-modules/flowlogs_reader/default.nix
index 1a6591040a2e3..9fd36fab2941d 100644
--- a/pkgs/development/python-modules/flowlogs_reader/default.nix
+++ b/pkgs/development/python-modules/flowlogs_reader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/flup/default.nix b/pkgs/development/python-modules/flup/default.nix
index 52ac5da27aa13..fa19d9bdf7a56 100644
--- a/pkgs/development/python-modules/flup/default.nix
+++ b/pkgs/development/python-modules/flup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/flux-led/default.nix b/pkgs/development/python-modules/flux-led/default.nix
index ddec811e21ced..64eafed6c198a 100644
--- a/pkgs/development/python-modules/flux-led/default.nix
+++ b/pkgs/development/python-modules/flux-led/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , aiohttp, zigpy
 , pytest, isPy27 }:
 
diff --git a/pkgs/development/python-modules/foolscap/default.nix b/pkgs/development/python-modules/foolscap/default.nix
index 396bef6d009e2..e0d38a5a13139 100644
--- a/pkgs/development/python-modules/foolscap/default.nix
+++ b/pkgs/development/python-modules/foolscap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/forbiddenfruit/default.nix b/pkgs/development/python-modules/forbiddenfruit/default.nix
index 64713d96adea1..1bb3b17e9df30 100644
--- a/pkgs/development/python-modules/forbiddenfruit/default.nix
+++ b/pkgs/development/python-modules/forbiddenfruit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/foxdot/default.nix b/pkgs/development/python-modules/foxdot/default.nix
index d60c1e89900ad..072129e6ea5a7 100644
--- a/pkgs/development/python-modules/foxdot/default.nix
+++ b/pkgs/development/python-modules/foxdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, tkinter, supercollider }:
+{ lib, buildPythonPackage, fetchPypi, tkinter, supercollider }:
 
 buildPythonPackage rec {
   pname = "FoxDot";
diff --git a/pkgs/development/python-modules/freezegun/0.3.nix b/pkgs/development/python-modules/freezegun/0.3.nix
index 9dc88596f2676..09ce8bbd11b14 100644
--- a/pkgs/development/python-modules/freezegun/0.3.nix
+++ b/pkgs/development/python-modules/freezegun/0.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/freezegun/default.nix b/pkgs/development/python-modules/freezegun/default.nix
index f1b1d9738d725..4c5a87e8266b2 100644
--- a/pkgs/development/python-modules/freezegun/default.nix
+++ b/pkgs/development/python-modules/freezegun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/fritzconnection/default.nix b/pkgs/development/python-modules/fritzconnection/default.nix
index 571fba1a8acd5..b8312d1c8ec58 100644
--- a/pkgs/development/python-modules/fritzconnection/default.nix
+++ b/pkgs/development/python-modules/fritzconnection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
+{ lib, buildPythonPackage, pythonOlder, fetchFromGitHub, pytestCheckHook, requests }:
 
 buildPythonPackage rec {
   pname = "fritzconnection";
diff --git a/pkgs/development/python-modules/frozendict/default.nix b/pkgs/development/python-modules/frozendict/default.nix
index dd0c99298265b..e172f3815b7ee 100644
--- a/pkgs/development/python-modules/frozendict/default.nix
+++ b/pkgs/development/python-modules/frozendict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "frozendict";
diff --git a/pkgs/development/python-modules/ftfy/default.nix b/pkgs/development/python-modules/ftfy/default.nix
index 63342c7045d04..dbc3631722889 100644
--- a/pkgs/development/python-modules/ftfy/default.nix
+++ b/pkgs/development/python-modules/ftfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/fudge/default.nix b/pkgs/development/python-modules/fudge/default.nix
index 3f53b66d1efa4..ba97b2e8f47a8 100644
--- a/pkgs/development/python-modules/fudge/default.nix
+++ b/pkgs/development/python-modules/fudge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/funcparserlib/default.nix b/pkgs/development/python-modules/funcparserlib/default.nix
index 773ed1dccd677..19e2dd146d205 100644
--- a/pkgs/development/python-modules/funcparserlib/default.nix
+++ b/pkgs/development/python-modules/funcparserlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/funcsigs/default.nix b/pkgs/development/python-modules/funcsigs/default.nix
index 1464baa57df23..8a7335accda40 100644
--- a/pkgs/development/python-modules/funcsigs/default.nix
+++ b/pkgs/development/python-modules/funcsigs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , isPyPy, isPy3k, unittest2
 }:
 
diff --git a/pkgs/development/python-modules/functools32/default.nix b/pkgs/development/python-modules/functools32/default.nix
index cec9da4239584..be907e963c100 100644
--- a/pkgs/development/python-modules/functools32/default.nix
+++ b/pkgs/development/python-modules/functools32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/funcy/default.nix b/pkgs/development/python-modules/funcy/default.nix
index 3db08cf22bbd6..515f0925cafa4 100644
--- a/pkgs/development/python-modules/funcy/default.nix
+++ b/pkgs/development/python-modules/funcy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/furl/default.nix b/pkgs/development/python-modules/furl/default.nix
index b7592885007e8..72089da11e10d 100644
--- a/pkgs/development/python-modules/furl/default.nix
+++ b/pkgs/development/python-modules/furl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, orderedmultidict, pytest }:
 
 buildPythonPackage rec {
   pname = "furl";
diff --git a/pkgs/development/python-modules/fuse-python/default.nix b/pkgs/development/python-modules/fuse-python/default.nix
index a130fab0d7eba..14f2cb584ea8e 100644
--- a/pkgs/development/python-modules/fuse-python/default.nix
+++ b/pkgs/development/python-modules/fuse-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, fuse }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, fuse }:
 
 buildPythonPackage rec {
   pname = "fuse-python";
diff --git a/pkgs/development/python-modules/fusepy/default.nix b/pkgs/development/python-modules/fusepy/default.nix
index 858d3e13ea0ca..45b708630427a 100644
--- a/pkgs/development/python-modules/fusepy/default.nix
+++ b/pkgs/development/python-modules/fusepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/fuzzywuzzy/default.nix b/pkgs/development/python-modules/fuzzywuzzy/default.nix
index c2d16a559842a..0bcf8efc359e9 100644
--- a/pkgs/development/python-modules/fuzzywuzzy/default.nix
+++ b/pkgs/development/python-modules/fuzzywuzzy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
+{ lib, buildPythonPackage, fetchPypi, python-Levenshtein, pycodestyle, hypothesis, pytest }:
 
 buildPythonPackage rec {
   pname = "fuzzywuzzy";
diff --git a/pkgs/development/python-modules/gast/default.nix b/pkgs/development/python-modules/gast/default.nix
index e4dbe43ef8d75..38334d5cc6b4f 100644
--- a/pkgs/development/python-modules/gast/default.nix
+++ b/pkgs/development/python-modules/gast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, astunparse }:
+{ lib, fetchPypi, buildPythonPackage, astunparse }:
 
 buildPythonPackage rec {
   pname = "gast";
diff --git a/pkgs/development/python-modules/gateone/default.nix b/pkgs/development/python-modules/gateone/default.nix
index 981cbbb7e8c30..5c45e875e5daf 100644
--- a/pkgs/development/python-modules/gateone/default.nix
+++ b/pkgs/development/python-modules/gateone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , tornado
 , futures
diff --git a/pkgs/development/python-modules/gcovr/default.nix b/pkgs/development/python-modules/gcovr/default.nix
index bedb7f3a3755b..1332777189b13 100644
--- a/pkgs/development/python-modules/gcovr/default.nix
+++ b/pkgs/development/python-modules/gcovr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/gdata/default.nix b/pkgs/development/python-modules/gdata/default.nix
index bf9c01c250abd..94430d0d94110 100644
--- a/pkgs/development/python-modules/gdata/default.nix
+++ b/pkgs/development/python-modules/gdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/gdrivefs/default.nix b/pkgs/development/python-modules/gdrivefs/default.nix
index aab5efea97def..6060dc3a5bb81 100644
--- a/pkgs/development/python-modules/gdrivefs/default.nix
+++ b/pkgs/development/python-modules/gdrivefs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/geeknote/default.nix b/pkgs/development/python-modules/geeknote/default.nix
index 4eb209a8af7f6..6c4165481841b 100644
--- a/pkgs/development/python-modules/geeknote/default.nix
+++ b/pkgs/development/python-modules/geeknote/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/genanki/default.nix b/pkgs/development/python-modules/genanki/default.nix
index f43fdabf09e51..3f217afd8bb05 100644
--- a/pkgs/development/python-modules/genanki/default.nix
+++ b/pkgs/development/python-modules/genanki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , cached-property, frozendict, pystache, pyyaml, pytest, pytestrunner
 }:
 
diff --git a/pkgs/development/python-modules/genshi/default.nix b/pkgs/development/python-modules/genshi/default.nix
index 9a6e4508e30e4..c476960bbf836 100644
--- a/pkgs/development/python-modules/genshi/default.nix
+++ b/pkgs/development/python-modules/genshi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/genzshcomp/default.nix b/pkgs/development/python-modules/genzshcomp/default.nix
index 8f486cc29efbe..a848eff41a658 100644
--- a/pkgs/development/python-modules/genzshcomp/default.nix
+++ b/pkgs/development/python-modules/genzshcomp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/geoalchemy2/default.nix b/pkgs/development/python-modules/geoalchemy2/default.nix
index 56f9346668f69..b629d48c61f69 100644
--- a/pkgs/development/python-modules/geoalchemy2/default.nix
+++ b/pkgs/development/python-modules/geoalchemy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sqlalchemy
diff --git a/pkgs/development/python-modules/geographiclib/default.nix b/pkgs/development/python-modules/geographiclib/default.nix
index 98c1ee417e432..5167b98660492 100644
--- a/pkgs/development/python-modules/geographiclib/default.nix
+++ b/pkgs/development/python-modules/geographiclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/geopy/2.nix b/pkgs/development/python-modules/geopy/2.nix
index ae4e07e254792..48df43e221730 100644
--- a/pkgs/development/python-modules/geopy/2.nix
+++ b/pkgs/development/python-modules/geopy/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/gevent-socketio/default.nix b/pkgs/development/python-modules/gevent-socketio/default.nix
index 88d1089d5a311..4a25e0d7e1484 100644
--- a/pkgs/development/python-modules/gevent-socketio/default.nix
+++ b/pkgs/development/python-modules/gevent-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , versiontools
diff --git a/pkgs/development/python-modules/gevent-websocket/default.nix b/pkgs/development/python-modules/gevent-websocket/default.nix
index 431a0c09a30c3..7ff62a378ca98 100644
--- a/pkgs/development/python-modules/gevent-websocket/default.nix
+++ b/pkgs/development/python-modules/gevent-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/gevent/default.nix b/pkgs/development/python-modules/gevent/default.nix
index 0fcf6cdfaaa9d..3fe9e648ce32f 100644
--- a/pkgs/development/python-modules/gevent/default.nix
+++ b/pkgs/development/python-modules/gevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
+{ lib, fetchPypi, buildPythonPackage, isPyPy, python, libev, greenlet
 , zope_interface
 }:
 
diff --git a/pkgs/development/python-modules/geventhttpclient/default.nix b/pkgs/development/python-modules/geventhttpclient/default.nix
index fafbef12bd3a6..c82da3c8a98ee 100644
--- a/pkgs/development/python-modules/geventhttpclient/default.nix
+++ b/pkgs/development/python-modules/geventhttpclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/ghdiff/default.nix b/pkgs/development/python-modules/ghdiff/default.nix
index a9582648117a5..efbdc2f59f9aa 100644
--- a/pkgs/development/python-modules/ghdiff/default.nix
+++ b/pkgs/development/python-modules/ghdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , zope_testrunner, six, chardet}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gipc/default.nix b/pkgs/development/python-modules/gipc/default.nix
index a48547f290990..8df2808328fb2 100644
--- a/pkgs/development/python-modules/gipc/default.nix
+++ b/pkgs/development/python-modules/gipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , gevent
diff --git a/pkgs/development/python-modules/git-annex-adapter/default.nix b/pkgs/development/python-modules/git-annex-adapter/default.nix
index 5922377ab3a15..d41874cff3b52 100644
--- a/pkgs/development/python-modules/git-annex-adapter/default.nix
+++ b/pkgs/development/python-modules/git-annex-adapter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, fetchpatch, substituteAll
 , python, util-linux, pygit2, gitMinimal, git-annex, cacert
 }:
 
diff --git a/pkgs/development/python-modules/git-sweep/default.nix b/pkgs/development/python-modules/git-sweep/default.nix
index adb9de4dbc0dd..2b17a46190b61 100644
--- a/pkgs/development/python-modules/git-sweep/default.nix
+++ b/pkgs/development/python-modules/git-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , GitPython
diff --git a/pkgs/development/python-modules/globre/default.nix b/pkgs/development/python-modules/globre/default.nix
index 21d2983ab0152..5debd1d0ab652 100644
--- a/pkgs/development/python-modules/globre/default.nix
+++ b/pkgs/development/python-modules/globre/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/glom/default.nix b/pkgs/development/python-modules/glom/default.nix
index 2acc87a17ac46..89f0de4749012 100644
--- a/pkgs/development/python-modules/glom/default.nix
+++ b/pkgs/development/python-modules/glom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , boltons
diff --git a/pkgs/development/python-modules/gmpy2/default.nix b/pkgs/development/python-modules/gmpy2/default.nix
index 808b918681bb3..204415d753154 100644
--- a/pkgs/development/python-modules/gmpy2/default.nix
+++ b/pkgs/development/python-modules/gmpy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/gmusicapi/default.nix b/pkgs/development/python-modules/gmusicapi/default.nix
index 821e0ba0afa99..1797f1d4264d1 100644
--- a/pkgs/development/python-modules/gmusicapi/default.nix
+++ b/pkgs/development/python-modules/gmusicapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , validictory
diff --git a/pkgs/development/python-modules/gnureadline/default.nix b/pkgs/development/python-modules/gnureadline/default.nix
index 71116c37041b8..6f3ae30e8cde2 100644
--- a/pkgs/development/python-modules/gnureadline/default.nix
+++ b/pkgs/development/python-modules/gnureadline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/gnutls/default.nix b/pkgs/development/python-modules/gnutls/default.nix
index addbee81bd3fa..3c68a1713a0ab 100644
--- a/pkgs/development/python-modules/gnutls/default.nix
+++ b/pkgs/development/python-modules/gnutls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/goobook/default.nix b/pkgs/development/python-modules/goobook/default.nix
index c587c928e7e77..83175b6c86a51 100644
--- a/pkgs/development/python-modules/goobook/default.nix
+++ b/pkgs/development/python-modules/goobook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , docutils, installShellFiles
 , google_api_python_client, simplejson, oauth2client, setuptools, xdg
 }:
diff --git a/pkgs/development/python-modules/google-apputils/default.nix b/pkgs/development/python-modules/google-apputils/default.nix
index 7cc7f4858826e..321837f56aece 100644
--- a/pkgs/development/python-modules/google-apputils/default.nix
+++ b/pkgs/development/python-modules/google-apputils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 9120f93a3bddd..22b02552cd757 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchpatch
 , fetchPypi
diff --git a/pkgs/development/python-modules/google-cloud-asset/default.nix b/pkgs/development/python-modules/google-cloud-asset/default.nix
index 8f04fb7451d2b..aec3b51acb5e4 100644
--- a/pkgs/development/python-modules/google-cloud-asset/default.nix
+++ b/pkgs/development/python-modules/google-cloud-asset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-automl/default.nix b/pkgs/development/python-modules/google-cloud-automl/default.nix
index 302ce8ceaed36..83fe052a54228 100644
--- a/pkgs/development/python-modules/google-cloud-automl/default.nix
+++ b/pkgs/development/python-modules/google-cloud-automl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
index 4ec12a8fa2fb0..8f67fed79d7a4 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-bigquery/default.nix b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
index 5eab2c730f7d8..a99588199bf46 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-bigtable/default.nix b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
index 9632dc902d15c..93cbc22b7cd8e 100644
--- a/pkgs/development/python-modules/google-cloud-bigtable/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigtable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-container/default.nix b/pkgs/development/python-modules/google-cloud-container/default.nix
index 6d91bed83ae70..1cf94d220e699 100644
--- a/pkgs/development/python-modules/google-cloud-container/default.nix
+++ b/pkgs/development/python-modules/google-cloud-container/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-core/default.nix b/pkgs/development/python-modules/google-cloud-core/default.nix
index 72709c62ceca2..44764a4edb1c1 100644
--- a/pkgs/development/python-modules/google-cloud-core/default.nix
+++ b/pkgs/development/python-modules/google-cloud-core/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/google-cloud-dataproc/default.nix b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
index 1b7a570fed218..095e01fbbd766 100644
--- a/pkgs/development/python-modules/google-cloud-dataproc/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dataproc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-datastore/default.nix b/pkgs/development/python-modules/google-cloud-datastore/default.nix
index 84f98550b9a3a..4c8c79c7ddae8 100644
--- a/pkgs/development/python-modules/google-cloud-datastore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-datastore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dlp/default.nix b/pkgs/development/python-modules/google-cloud-dlp/default.nix
index 9076c1298040e..451607a53579c 100644
--- a/pkgs/development/python-modules/google-cloud-dlp/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dlp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-dns/default.nix b/pkgs/development/python-modules/google-cloud-dns/default.nix
index 0636da60e9af2..fa4c8c6c52df2 100644
--- a/pkgs/development/python-modules/google-cloud-dns/default.nix
+++ b/pkgs/development/python-modules/google-cloud-dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
index b3181f8fcded0..1457c044fe54a 100644
--- a/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
+++ b/pkgs/development/python-modules/google-cloud-error-reporting/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-firestore/default.nix b/pkgs/development/python-modules/google-cloud-firestore/default.nix
index f0c235ca0c98b..30ef0af76a1a5 100644
--- a/pkgs/development/python-modules/google-cloud-firestore/default.nix
+++ b/pkgs/development/python-modules/google-cloud-firestore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , aiounittest
diff --git a/pkgs/development/python-modules/google-cloud-iot/default.nix b/pkgs/development/python-modules/google-cloud-iot/default.nix
index 2b28f84a31589..ac511f8064725 100644
--- a/pkgs/development/python-modules/google-cloud-iot/default.nix
+++ b/pkgs/development/python-modules/google-cloud-iot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-kms/default.nix b/pkgs/development/python-modules/google-cloud-kms/default.nix
index 6675767a2445d..94dd7c1ba8ff0 100644
--- a/pkgs/development/python-modules/google-cloud-kms/default.nix
+++ b/pkgs/development/python-modules/google-cloud-kms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-language/default.nix b/pkgs/development/python-modules/google-cloud-language/default.nix
index 7186ecd6f3551..c43c51d97f74b 100644
--- a/pkgs/development/python-modules/google-cloud-language/default.nix
+++ b/pkgs/development/python-modules/google-cloud-language/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-logging/default.nix b/pkgs/development/python-modules/google-cloud-logging/default.nix
index 58d03f206fc78..b8ffa935fc365 100644
--- a/pkgs/development/python-modules/google-cloud-logging/default.nix
+++ b/pkgs/development/python-modules/google-cloud-logging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/google-cloud-monitoring/default.nix b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
index 8dc665fe21039..f8fc079aa3e48 100644
--- a/pkgs/development/python-modules/google-cloud-monitoring/default.nix
+++ b/pkgs/development/python-modules/google-cloud-monitoring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-pubsub/default.nix b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
index 46a28b1ffd1da..d3846ad4f429c 100644
--- a/pkgs/development/python-modules/google-cloud-pubsub/default.nix
+++ b/pkgs/development/python-modules/google-cloud-pubsub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-redis/default.nix b/pkgs/development/python-modules/google-cloud-redis/default.nix
index 4dcf7fd3d3180..86fbc360d73c6 100644
--- a/pkgs/development/python-modules/google-cloud-redis/default.nix
+++ b/pkgs/development/python-modules/google-cloud-redis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
index 11baf3d73f3d0..8a265182fba43 100644
--- a/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
+++ b/pkgs/development/python-modules/google-cloud-resource-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
index 81fa97f152bb1..0a3285566f197 100644
--- a/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
+++ b/pkgs/development/python-modules/google-cloud-runtimeconfig/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
index 242198a219715..184044594d520 100644
--- a/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
+++ b/pkgs/development/python-modules/google-cloud-securitycenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-spanner/default.nix b/pkgs/development/python-modules/google-cloud-spanner/default.nix
index 382476af0ca31..759a8f25c1af8 100644
--- a/pkgs/development/python-modules/google-cloud-spanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-spanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc_google_iam_v1
diff --git a/pkgs/development/python-modules/google-cloud-speech/default.nix b/pkgs/development/python-modules/google-cloud-speech/default.nix
index 3359cfdd743aa..c57329eebcc3c 100644
--- a/pkgs/development/python-modules/google-cloud-speech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-speech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-tasks/default.nix b/pkgs/development/python-modules/google-cloud-tasks/default.nix
index e30986af6106a..5911bfe615629 100644
--- a/pkgs/development/python-modules/google-cloud-tasks/default.nix
+++ b/pkgs/development/python-modules/google-cloud-tasks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-testutils/default.nix b/pkgs/development/python-modules/google-cloud-testutils/default.nix
index 3f6792fa77b76..2380e9183b733 100644
--- a/pkgs/development/python-modules/google-cloud-testutils/default.nix
+++ b/pkgs/development/python-modules/google-cloud-testutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, google-auth, six }:
+{ lib, buildPythonPackage, fetchPypi, google-auth, six }:
 
 buildPythonPackage rec {
   pname = "google-cloud-testutils";
diff --git a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
index a7228a42999b8..3c84c21344a92 100644
--- a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-trace/default.nix b/pkgs/development/python-modules/google-cloud-trace/default.nix
index 1252c99bf4862..486a71c7a97e1 100644
--- a/pkgs/development/python-modules/google-cloud-trace/default.nix
+++ b/pkgs/development/python-modules/google-cloud-trace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-translate/default.nix b/pkgs/development/python-modules/google-cloud-translate/default.nix
index 32d402e1cf031..2b0ac55fa2ebf 100644
--- a/pkgs/development/python-modules/google-cloud-translate/default.nix
+++ b/pkgs/development/python-modules/google-cloud-translate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
index 43fed1fe27faf..26e3320a5ccb2 100644
--- a/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
+++ b/pkgs/development/python-modules/google-cloud-videointelligence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/google-cloud-vision/default.nix b/pkgs/development/python-modules/google-cloud-vision/default.nix
index 57a51f96e65ee..12f63bd0e1c43 100644
--- a/pkgs/development/python-modules/google-cloud-vision/default.nix
+++ b/pkgs/development/python-modules/google-cloud-vision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , google-api-core
diff --git a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
index 20614f5b5d863..ac91ab85bd64c 100644
--- a/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
+++ b/pkgs/development/python-modules/google-cloud-websecurityscanner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/googleapis_common_protos/default.nix b/pkgs/development/python-modules/googleapis_common_protos/default.nix
index 7e5b786b4fba6..898971629ae01 100644
--- a/pkgs/development/python-modules/googleapis_common_protos/default.nix
+++ b/pkgs/development/python-modules/googleapis_common_protos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpc
diff --git a/pkgs/development/python-modules/googlemaps/default.nix b/pkgs/development/python-modules/googlemaps/default.nix
index c971119833e6f..007d4eb2cea7b 100644
--- a/pkgs/development/python-modules/googlemaps/default.nix
+++ b/pkgs/development/python-modules/googlemaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/gorilla/default.nix b/pkgs/development/python-modules/gorilla/default.nix
index bf4212edc5109..42da45416470d 100644
--- a/pkgs/development/python-modules/gorilla/default.nix
+++ b/pkgs/development/python-modules/gorilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi}:
+{ lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "gorilla";
diff --git a/pkgs/development/python-modules/gpapi/default.nix b/pkgs/development/python-modules/gpapi/default.nix
index 788473b5ab8f3..6ed9f48dd61c7 100644
--- a/pkgs/development/python-modules/gpapi/default.nix
+++ b/pkgs/development/python-modules/gpapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , requests
 , protobuf
 , pycryptodome
diff --git a/pkgs/development/python-modules/gphoto2/default.nix b/pkgs/development/python-modules/gphoto2/default.nix
index 0dd68918aed64..31ac03347cb2d 100644
--- a/pkgs/development/python-modules/gphoto2/default.nix
+++ b/pkgs/development/python-modules/gphoto2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , pkg-config
 , libgphoto2 }:
 
diff --git a/pkgs/development/python-modules/gplaycli/default.nix b/pkgs/development/python-modules/gplaycli/default.nix
index ecd52ad848c95..28f244bc354cf 100644
--- a/pkgs/development/python-modules/gplaycli/default.nix
+++ b/pkgs/development/python-modules/gplaycli/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
+{ buildPythonPackage, lib, libffi, isPy3k, pyasn1, clint, ndg-httpsclient
 , protobuf, requests, args, gpapi, pyaxmlparser, fetchFromGitHub
 }:
 
diff --git a/pkgs/development/python-modules/gpsoauth/default.nix b/pkgs/development/python-modules/gpsoauth/default.nix
index 2c4dfcd813959..1ad50642e2b9b 100644
--- a/pkgs/development/python-modules/gpsoauth/default.nix
+++ b/pkgs/development/python-modules/gpsoauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cffi
diff --git a/pkgs/development/python-modules/gpyopt/default.nix b/pkgs/development/python-modules/gpyopt/default.nix
index 22e6743582c25..85b6efabaa8c1 100644
--- a/pkgs/development/python-modules/gpyopt/default.nix
+++ b/pkgs/development/python-modules/gpyopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, setuptools
+{ lib, buildPythonPackage, fetchFromGitHub, setuptools
 , numpy, scipy, gpy, emcee, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gradient_sdk/default.nix b/pkgs/development/python-modules/gradient_sdk/default.nix
index adaafd8eadbe4..3dffb38f2ffc8 100644
--- a/pkgs/development/python-modules/gradient_sdk/default.nix
+++ b/pkgs/development/python-modules/gradient_sdk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , hyperopt
 }:
 
diff --git a/pkgs/development/python-modules/gradient_statsd/default.nix b/pkgs/development/python-modules/gradient_statsd/default.nix
index 607737d99ae02..ada005d14f8ea 100644
--- a/pkgs/development/python-modules/gradient_statsd/default.nix
+++ b/pkgs/development/python-modules/gradient_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, datadog, configparser, python
 }:
 
diff --git a/pkgs/development/python-modules/graphite-web/default.nix b/pkgs/development/python-modules/graphite-web/default.nix
index 0bced13cd1124..17ac913291633 100644
--- a/pkgs/development/python-modules/graphite-web/default.nix
+++ b/pkgs/development/python-modules/graphite-web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , django, django_tagging, whisper, pycairo, cairocffi, ldap, memcached, pytz, urllib3, scandir
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/graphite_beacon/default.nix b/pkgs/development/python-modules/graphite_beacon/default.nix
index 06b66ccbc145a..20522d2830459 100644
--- a/pkgs/development/python-modules/graphite_beacon/default.nix
+++ b/pkgs/development/python-modules/graphite_beacon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , tornado_5, pyyaml, funcparserlib
 , nixosTests
 }:
diff --git a/pkgs/development/python-modules/grappelli_safe/default.nix b/pkgs/development/python-modules/grappelli_safe/default.nix
index 7b2dd7e3fedda..ae7ddb0c76b4f 100644
--- a/pkgs/development/python-modules/grappelli_safe/default.nix
+++ b/pkgs/development/python-modules/grappelli_safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/grequests/default.nix b/pkgs/development/python-modules/grequests/default.nix
index 5ce5df8cdea25..50c95df7dc91c 100644
--- a/pkgs/development/python-modules/grequests/default.nix
+++ b/pkgs/development/python-modules/grequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/grip/default.nix b/pkgs/development/python-modules/grip/default.nix
index 019cd798d640f..dafa692493e3d 100644
--- a/pkgs/development/python-modules/grip/default.nix
+++ b/pkgs/development/python-modules/grip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 # Python bits:
diff --git a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
index dd9527006dad6..7291cd4b65e0f 100644
--- a/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
+++ b/pkgs/development/python-modules/grpc_google_iam_v1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/grpcio-gcp/default.nix b/pkgs/development/python-modules/grpcio-gcp/default.nix
index 1b631c0973ede..656e147ac50aa 100644
--- a/pkgs/development/python-modules/grpcio-gcp/default.nix
+++ b/pkgs/development/python-modules/grpcio-gcp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , grpcio
diff --git a/pkgs/development/python-modules/gsd/1.7.nix b/pkgs/development/python-modules/gsd/1.7.nix
index 0512a4906a273..8d19acdc70de4 100644
--- a/pkgs/development/python-modules/gsd/1.7.nix
+++ b/pkgs/development/python-modules/gsd/1.7.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/gspread/default.nix b/pkgs/development/python-modules/gspread/default.nix
index 7cf2a8c8df113..0370f80b4a40b 100644
--- a/pkgs/development/python-modules/gspread/default.nix
+++ b/pkgs/development/python-modules/gspread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/gst-python/default.nix b/pkgs/development/python-modules/gst-python/default.nix
index 9ff8434cc9aa9..ea89f7214c631 100644
--- a/pkgs/development/python-modules/gst-python/default.nix
+++ b/pkgs/development/python-modules/gst-python/default.nix
@@ -3,7 +3,7 @@
 , fetchurl
 , meson
 , ninja
-, stdenv
+
 , pkg-config
 , python3
 , pygobject3
diff --git a/pkgs/development/python-modules/gtimelog/default.nix b/pkgs/development/python-modules/gtimelog/default.nix
index 3af8e97ba71bd..bb31baa78880f 100644
--- a/pkgs/development/python-modules/gtimelog/default.nix
+++ b/pkgs/development/python-modules/gtimelog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper
+{ lib, fetchFromGitHub, makeWrapper
 , glibcLocales, gobject-introspection, gtk3, libsoup, libsecret
 , buildPythonPackage, python
 , pygobject3, freezegun, mock
diff --git a/pkgs/development/python-modules/guestfs/default.nix b/pkgs/development/python-modules/guestfs/default.nix
index 23a2545525a3a..0f1d2ddf05cc3 100644
--- a/pkgs/development/python-modules/guestfs/default.nix
+++ b/pkgs/development/python-modules/guestfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, libguestfs, qemu }:
+{ lib, buildPythonPackage, fetchurl, libguestfs, qemu }:
 
 buildPythonPackage rec {
   pname = "guestfs";
diff --git a/pkgs/development/python-modules/gunicorn/19.nix b/pkgs/development/python-modules/gunicorn/19.nix
index c1091fa980c98..7d43ce95a7e35 100644
--- a/pkgs/development/python-modules/gunicorn/19.nix
+++ b/pkgs/development/python-modules/gunicorn/19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/gunicorn/default.nix b/pkgs/development/python-modules/gunicorn/default.nix
index 983335f4395bc..3f3eceee37807 100644
--- a/pkgs/development/python-modules/gunicorn/default.nix
+++ b/pkgs/development/python-modules/gunicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , coverage
 , mock
 , pytest
diff --git a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
index f70625b86fe26..6f765bd98d6b2 100644
--- a/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
+++ b/pkgs/development/python-modules/guzzle_sphinx_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, sphinx, fetchPypi }:
+{ lib, buildPythonPackage, sphinx, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "guzzle_sphinx_theme";
diff --git a/pkgs/development/python-modules/h2/default.nix b/pkgs/development/python-modules/h2/default.nix
index 6dad775732c01..ba681658e9a28 100644
--- a/pkgs/development/python-modules/h2/default.nix
+++ b/pkgs/development/python-modules/h2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34, hpack, hyperframe, pytestCheckHook, hypothesis }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ha-ffmpeg/default.nix b/pkgs/development/python-modules/ha-ffmpeg/default.nix
index 653c4483ce829..84810fd2b5320 100644
--- a/pkgs/development/python-modules/ha-ffmpeg/default.nix
+++ b/pkgs/development/python-modules/ha-ffmpeg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , ffmpeg_3, async-timeout }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/handout/default.nix b/pkgs/development/python-modules/handout/default.nix
index b2b7b4b3d1427..316c9a6edcac4 100644
--- a/pkgs/development/python-modules/handout/default.nix
+++ b/pkgs/development/python-modules/handout/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , imageio, imageio-ffmpeg }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hawkauthlib/default.nix b/pkgs/development/python-modules/hawkauthlib/default.nix
index a0b7d50b560d6..7afb4eefa060e 100644
--- a/pkgs/development/python-modules/hawkauthlib/default.nix
+++ b/pkgs/development/python-modules/hawkauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/hbmqtt/default.nix b/pkgs/development/python-modules/hbmqtt/default.nix
index 003805f939c63..c457da9188623 100644
--- a/pkgs/development/python-modules/hbmqtt/default.nix
+++ b/pkgs/development/python-modules/hbmqtt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pythonAtLeast, setuptools
 , transitions, websockets, passlib, docopt, pyyaml, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hcs_utils/default.nix b/pkgs/development/python-modules/hcs_utils/default.nix
index 56e9811396e61..5dd94e5de2ea9 100644
--- a/pkgs/development/python-modules/hcs_utils/default.nix
+++ b/pkgs/development/python-modules/hcs_utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
+{ lib, pythonOlder, buildPythonPackage, fetchPypi, six, glibcLocales, pytest }:
 
 buildPythonPackage rec {
   pname = "hcs_utils";
diff --git a/pkgs/development/python-modules/hdmedians/default.nix b/pkgs/development/python-modules/hdmedians/default.nix
index 3b65e10bfcece..f1b0d13e56e58 100644
--- a/pkgs/development/python-modules/hdmedians/default.nix
+++ b/pkgs/development/python-modules/hdmedians/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/heapdict/default.nix b/pkgs/development/python-modules/heapdict/default.nix
index 4cd695925f280..61cbe39a256a1 100644
--- a/pkgs/development/python-modules/heapdict/default.nix
+++ b/pkgs/development/python-modules/heapdict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "HeapDict";
diff --git a/pkgs/development/python-modules/helper/default.nix b/pkgs/development/python-modules/helper/default.nix
index 4c7ff0c3878f3..8560364d4f41a 100644
--- a/pkgs/development/python-modules/helper/default.nix
+++ b/pkgs/development/python-modules/helper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, mock }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, mock }:
 
 buildPythonPackage rec {
   pname = "helper";
diff --git a/pkgs/development/python-modules/hetzner/default.nix b/pkgs/development/python-modules/hetzner/default.nix
index 3b938dfc237c7..9b89567d8ef5d 100644
--- a/pkgs/development/python-modules/hetzner/default.nix
+++ b/pkgs/development/python-modules/hetzner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/heudiconv/default.nix b/pkgs/development/python-modules/heudiconv/default.nix
index ce29181882412..4e65f5b917212 100644
--- a/pkgs/development/python-modules/heudiconv/default.nix
+++ b/pkgs/development/python-modules/heudiconv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hglib/default.nix b/pkgs/development/python-modules/hglib/default.nix
index afac7983584cc..a6ed6b935ad18 100644
--- a/pkgs/development/python-modules/hglib/default.nix
+++ b/pkgs/development/python-modules/hglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, substituteAll, python, nose, mercurial }:
 
 buildPythonPackage rec {
   pname = "python-hglib";
diff --git a/pkgs/development/python-modules/hgsvn/default.nix b/pkgs/development/python-modules/hgsvn/default.nix
index 2ee6024cd4757..b8b6d43b54808 100644
--- a/pkgs/development/python-modules/hgsvn/default.nix
+++ b/pkgs/development/python-modules/hgsvn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hieroglyph/default.nix b/pkgs/development/python-modules/hieroglyph/default.nix
index 418059c51658d..d7fa9af5efaef 100644
--- a/pkgs/development/python-modules/hieroglyph/default.nix
+++ b/pkgs/development/python-modules/hieroglyph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27, sphinx }:
+{ lib, fetchPypi, buildPythonPackage, isPy27, sphinx }:
 
 buildPythonPackage rec {
   pname = "hieroglyph";
diff --git a/pkgs/development/python-modules/hiredis/default.nix b/pkgs/development/python-modules/hiredis/default.nix
index e9d5677f8bebc..ef10d195671de 100644
--- a/pkgs/development/python-modules/hiredis/default.nix
+++ b/pkgs/development/python-modules/hiredis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/hiro/default.nix b/pkgs/development/python-modules/hiro/default.nix
index 3ff672a22db65..00b5606096419 100644
--- a/pkgs/development/python-modules/hiro/default.nix
+++ b/pkgs/development/python-modules/hiro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, six, mock }:
 buildPythonPackage rec {
   pname = "hiro";
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/hjson/default.nix b/pkgs/development/python-modules/hjson/default.nix
index 3393ad186918c..096edbe5252e5 100644
--- a/pkgs/development/python-modules/hjson/default.nix
+++ b/pkgs/development/python-modules/hjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonImportsCheckHook
diff --git a/pkgs/development/python-modules/hkdf/default.nix b/pkgs/development/python-modules/hkdf/default.nix
index 966ce7001fbb7..43e7a8f4ce353 100644
--- a/pkgs/development/python-modules/hkdf/default.nix
+++ b/pkgs/development/python-modules/hkdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/hocr-tools/default.nix b/pkgs/development/python-modules/hocr-tools/default.nix
index 79a2e83508aad..cfbf63a5869d0 100644
--- a/pkgs/development/python-modules/hocr-tools/default.nix
+++ b/pkgs/development/python-modules/hocr-tools/default.nix
@@ -3,7 +3,7 @@
 , lxml
 , pillow
 , reportlab
-, lib, stdenv
+, lib
 }:
 buildPythonPackage rec {
   pname = "hocr-tools";
diff --git a/pkgs/development/python-modules/holidays/default.nix b/pkgs/development/python-modules/holidays/default.nix
index b5e0062d115a1..789dc57a571a8 100644
--- a/pkgs/development/python-modules/holidays/default.nix
+++ b/pkgs/development/python-modules/holidays/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , convertdate
diff --git a/pkgs/development/python-modules/hpack/default.nix b/pkgs/development/python-modules/hpack/default.nix
index 9b6f724cd3188..a5140a216cfd3 100644
--- a/pkgs/development/python-modules/hpack/default.nix
+++ b/pkgs/development/python-modules/hpack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/hsaudiotag/default.nix b/pkgs/development/python-modules/hsaudiotag/default.nix
index fba71dc3f109c..d38ceec7e131b 100644
--- a/pkgs/development/python-modules/hsaudiotag/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/hsaudiotag3k/default.nix b/pkgs/development/python-modules/hsaudiotag3k/default.nix
index 52919e4898372..66ea895960c97 100644
--- a/pkgs/development/python-modules/hsaudiotag3k/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag3k/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/html2text/2018.nix b/pkgs/development/python-modules/html2text/2018.nix
index 73540359ee1aa..06d0c14c7e435 100644
--- a/pkgs/development/python-modules/html2text/2018.nix
+++ b/pkgs/development/python-modules/html2text/2018.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/html5-parser/default.nix b/pkgs/development/python-modules/html5-parser/default.nix
index 0ceeda045827d..d20f0a9abfdbc 100644
--- a/pkgs/development/python-modules/html5-parser/default.nix
+++ b/pkgs/development/python-modules/html5-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
+{ lib, buildPythonPackage, fetchPypi, pkgs, pkg-config, chardet, lxml }:
 
 buildPythonPackage rec {
   pname = "html5-parser";
diff --git a/pkgs/development/python-modules/htmllaundry/default.nix b/pkgs/development/python-modules/htmllaundry/default.nix
index ef660fc0b9245..e844c99693a29 100644
--- a/pkgs/development/python-modules/htmllaundry/default.nix
+++ b/pkgs/development/python-modules/htmllaundry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi, nose
 , six
diff --git a/pkgs/development/python-modules/httmock/default.nix b/pkgs/development/python-modules/httmock/default.nix
index 117c7f5e132f1..cbf6b95ccd365 100644
--- a/pkgs/development/python-modules/httmock/default.nix
+++ b/pkgs/development/python-modules/httmock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname   = "httmock";
diff --git a/pkgs/development/python-modules/http_signature/default.nix b/pkgs/development/python-modules/http_signature/default.nix
index 145eea751b9b1..9169f1e412663 100644
--- a/pkgs/development/python-modules/http_signature/default.nix
+++ b/pkgs/development/python-modules/http_signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/httpauth/default.nix b/pkgs/development/python-modules/httpauth/default.nix
index b7867e22f1756..a7d4240db1439 100644
--- a/pkgs/development/python-modules/httpauth/default.nix
+++ b/pkgs/development/python-modules/httpauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/httpbin/default.nix b/pkgs/development/python-modules/httpbin/default.nix
index cbaf89c3ca61b..2e711141fcba8 100644
--- a/pkgs/development/python-modules/httpbin/default.nix
+++ b/pkgs/development/python-modules/httpbin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/humanize/default.nix b/pkgs/development/python-modules/humanize/default.nix
index 09e94f6275dd3..b6f78e5cf8fde 100644
--- a/pkgs/development/python-modules/humanize/default.nix
+++ b/pkgs/development/python-modules/humanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/hyperframe/default.nix b/pkgs/development/python-modules/hyperframe/default.nix
index a74198f383213..6cdee9948b918 100644
--- a/pkgs/development/python-modules/hyperframe/default.nix
+++ b/pkgs/development/python-modules/hyperframe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "hyperframe";
diff --git a/pkgs/development/python-modules/hyperopt/default.nix b/pkgs/development/python-modules/hyperopt/default.nix
index ba4aeef402ec4..d407ff95a010a 100644
--- a/pkgs/development/python-modules/hyperopt/default.nix
+++ b/pkgs/development/python-modules/hyperopt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , cloudpickle, numpy, future, networkx
 , six, tqdm, scipy, pymongo
 }:
diff --git a/pkgs/development/python-modules/i3-py/default.nix b/pkgs/development/python-modules/i3-py/default.nix
index 4dea7526b7e7f..312c1bb45c70d 100644
--- a/pkgs/development/python-modules/i3-py/default.nix
+++ b/pkgs/development/python-modules/i3-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/i3ipc/default.nix b/pkgs/development/python-modules/i3ipc/default.nix
index c27d413541128..37d5ccd8786f9 100644
--- a/pkgs/development/python-modules/i3ipc/default.nix
+++ b/pkgs/development/python-modules/i3ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , xorgserver, pytest, pytest-xvfb, i3, python, xlib, xdpyinfo
 , makeFontsConf, coreutils
 }:
diff --git a/pkgs/development/python-modules/icalendar/default.nix b/pkgs/development/python-modules/icalendar/default.nix
index 4499d5d62f4f4..8e75a945d10cc 100644
--- a/pkgs/development/python-modules/icalendar/default.nix
+++ b/pkgs/development/python-modules/icalendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/ics/default.nix b/pkgs/development/python-modules/ics/default.nix
index c186020fee1ea..011909d6b805a 100644
--- a/pkgs/development/python-modules/ics/default.nix
+++ b/pkgs/development/python-modules/ics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , tatsu, arrow
 , pytestCheckHook, pytest-flakes
 }:
diff --git a/pkgs/development/python-modules/ifaddr/default.nix b/pkgs/development/python-modules/ifaddr/default.nix
index 47997dbdc265e..35bafd67fa977 100644
--- a/pkgs/development/python-modules/ifaddr/default.nix
+++ b/pkgs/development/python-modules/ifaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipaddress
diff --git a/pkgs/development/python-modules/ifconfig-parser/default.nix b/pkgs/development/python-modules/ifconfig-parser/default.nix
index bdfd3767f8c45..be4e2026bf10a 100644
--- a/pkgs/development/python-modules/ifconfig-parser/default.nix
+++ b/pkgs/development/python-modules/ifconfig-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "ifconfig-parser";
diff --git a/pkgs/development/python-modules/ijson/default.nix b/pkgs/development/python-modules/ijson/default.nix
index a82a20ca7c8af..8ccc7eb4e0c0b 100644
--- a/pkgs/development/python-modules/ijson/default.nix
+++ b/pkgs/development/python-modules/ijson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "ijson";
diff --git a/pkgs/development/python-modules/image-match/default.nix b/pkgs/development/python-modules/image-match/default.nix
index 5c1953d6ac3f4..7464f3c899720 100644
--- a/pkgs/development/python-modules/image-match/default.nix
+++ b/pkgs/development/python-modules/image-match/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytestrunner, scikitimage }:
 
 buildPythonPackage {
   pname = "image-match";
diff --git a/pkgs/development/python-modules/imagecorruptions/default.nix b/pkgs/development/python-modules/imagecorruptions/default.nix
index 65c1cfd020a80..8d2b7fd8da880 100644
--- a/pkgs/development/python-modules/imagecorruptions/default.nix
+++ b/pkgs/development/python-modules/imagecorruptions/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , numpy
 , scikitimage
-, lib, stdenv
+, lib
 , opencv3
 }:
 
diff --git a/pkgs/development/python-modules/imageio/default.nix b/pkgs/development/python-modules/imageio/default.nix
index 71f7eae9c32fc..67920dc7b7d80 100644
--- a/pkgs/development/python-modules/imageio/default.nix
+++ b/pkgs/development/python-modules/imageio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , pathlib
diff --git a/pkgs/development/python-modules/imagesize/default.nix b/pkgs/development/python-modules/imagesize/default.nix
index cd48f54ee8f45..42cf6b50764dd 100644
--- a/pkgs/development/python-modules/imagesize/default.nix
+++ b/pkgs/development/python-modules/imagesize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/imapclient/default.nix b/pkgs/development/python-modules/imapclient/default.nix
index c091f53b8d4f4..27667f860ff11 100644
--- a/pkgs/development/python-modules/imapclient/default.nix
+++ b/pkgs/development/python-modules/imapclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/imbalanced-learn/0.4.nix b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
index fe21096d635d6..96ba16b1cd1af 100644
--- a/pkgs/development/python-modules/imbalanced-learn/0.4.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/0.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
+{ lib, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
 
 buildPythonPackage rec {
   pname = "imbalanced-learn";
diff --git a/pkgs/development/python-modules/imbalanced-learn/default.nix b/pkgs/development/python-modules/imbalanced-learn/default.nix
index 4253ed30e415c..f5418b89e802c 100644
--- a/pkgs/development/python-modules/imbalanced-learn/default.nix
+++ b/pkgs/development/python-modules/imbalanced-learn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , pandas
 , pytestCheckHook
 , scikitlearn
diff --git a/pkgs/development/python-modules/imgaug/default.nix b/pkgs/development/python-modules/imgaug/default.nix
index 9ca8531dbbced..343c7869a6c13 100644
--- a/pkgs/development/python-modules/imgaug/default.nix
+++ b/pkgs/development/python-modules/imgaug/default.nix
@@ -9,7 +9,7 @@
 , scipy
 , shapely
 , six
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/imgsize/default.nix b/pkgs/development/python-modules/imgsize/default.nix
index d1a69c043d0fb..a8f50cd8f326e 100644
--- a/pkgs/development/python-modules/imgsize/default.nix
+++ b/pkgs/development/python-modules/imgsize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/importmagic/default.nix b/pkgs/development/python-modules/importmagic/default.nix
index 3a6a3c9ef8d73..54308d632b276 100644
--- a/pkgs/development/python-modules/importmagic/default.nix
+++ b/pkgs/development/python-modules/importmagic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/imread/default.nix b/pkgs/development/python-modules/imread/default.nix
index 65ae47ed87b02..3d09e6a439713 100644
--- a/pkgs/development/python-modules/imread/default.nix
+++ b/pkgs/development/python-modules/imread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/imutils/default.nix b/pkgs/development/python-modules/imutils/default.nix
index 33c2ae0001c27..f402f913f38c3 100644
--- a/pkgs/development/python-modules/imutils/default.nix
+++ b/pkgs/development/python-modules/imutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , opencv3
diff --git a/pkgs/development/python-modules/influxdb/default.nix b/pkgs/development/python-modules/influxdb/default.nix
index 2d0fd5a93adb1..69fe83b8779b6 100644
--- a/pkgs/development/python-modules/influxdb/default.nix
+++ b/pkgs/development/python-modules/influxdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/influxgraph/default.nix b/pkgs/development/python-modules/influxgraph/default.nix
index 32374453375db..c8403cf644630 100644
--- a/pkgs/development/python-modules/influxgraph/default.nix
+++ b/pkgs/development/python-modules/influxgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , influxdb, graphite_api, memcached
 }:
 
diff --git a/pkgs/development/python-modules/infoqscraper/default.nix b/pkgs/development/python-modules/infoqscraper/default.nix
index 4baa891a77906..b250dfc6c7f69 100644
--- a/pkgs/development/python-modules/infoqscraper/default.nix
+++ b/pkgs/development/python-modules/infoqscraper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , html5lib
 , six
diff --git a/pkgs/development/python-modules/inifile/default.nix b/pkgs/development/python-modules/inifile/default.nix
index 9bd24a4d78894..c94c12ab0a8f5 100644
--- a/pkgs/development/python-modules/inifile/default.nix
+++ b/pkgs/development/python-modules/inifile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/iniparse/default.nix b/pkgs/development/python-modules/iniparse/default.nix
index c515b7865b155..e4473c0bd1c17 100644
--- a/pkgs/development/python-modules/iniparse/default.nix
+++ b/pkgs/development/python-modules/iniparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/inquirer/default.nix b/pkgs/development/python-modules/inquirer/default.nix
index c434a3f52bceb..e55fd8f39d558 100644
--- a/pkgs/development/python-modules/inquirer/default.nix
+++ b/pkgs/development/python-modules/inquirer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
+{ lib, buildPythonPackage, fetchFromGitHub, python-editor, readchar, blessed, pytest, pytestcov, pexpect, pytest-mock }:
 
 buildPythonPackage rec {
   pname = "inquirer";
diff --git a/pkgs/development/python-modules/interruptingcow/default.nix b/pkgs/development/python-modules/interruptingcow/default.nix
index b4e1dfaff1812..62e021afdbbb0 100644
--- a/pkgs/development/python-modules/interruptingcow/default.nix
+++ b/pkgs/development/python-modules/interruptingcow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "interruptingcow";
   version = "0.8";
diff --git a/pkgs/development/python-modules/intervaltree/default.nix b/pkgs/development/python-modules/intervaltree/default.nix
index 27a5fa3650e8b..dca73a93e8f4c 100644
--- a/pkgs/development/python-modules/intervaltree/default.nix
+++ b/pkgs/development/python-modules/intervaltree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , python, pytest, sortedcontainers }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ipaddr/default.nix b/pkgs/development/python-modules/ipaddr/default.nix
index 427681fedb86c..b29ee91792870 100644
--- a/pkgs/development/python-modules/ipaddr/default.nix
+++ b/pkgs/development/python-modules/ipaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ipaddress/default.nix b/pkgs/development/python-modules/ipaddress/default.nix
index f2e479aff96ec..06211470daa43 100644
--- a/pkgs/development/python-modules/ipaddress/default.nix
+++ b/pkgs/development/python-modules/ipaddress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/ipdb/default.nix b/pkgs/development/python-modules/ipdb/default.nix
index b21907f75ff50..7b8c877371cde 100644
--- a/pkgs/development/python-modules/ipdb/default.nix
+++ b/pkgs/development/python-modules/ipdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ipython
diff --git a/pkgs/development/python-modules/ipdbplugin/default.nix b/pkgs/development/python-modules/ipdbplugin/default.nix
index 057d82cbebc3c..9788fd8a5440f 100644
--- a/pkgs/development/python-modules/ipdbplugin/default.nix
+++ b/pkgs/development/python-modules/ipdbplugin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/ipfsapi/default.nix b/pkgs/development/python-modules/ipfsapi/default.nix
index 3deb0c6cb80cf..c97eafb6054c4 100644
--- a/pkgs/development/python-modules/ipfsapi/default.nix
+++ b/pkgs/development/python-modules/ipfsapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/iptools/default.nix b/pkgs/development/python-modules/iptools/default.nix
index 431c05bb38810..3f2b854b6e7fe 100644
--- a/pkgs/development/python-modules/iptools/default.nix
+++ b/pkgs/development/python-modules/iptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/iso3166/default.nix b/pkgs/development/python-modules/iso3166/default.nix
index acf6d3c9331dc..61ec91075b5a0 100644
--- a/pkgs/development/python-modules/iso3166/default.nix
+++ b/pkgs/development/python-modules/iso3166/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage {
   pname = "iso3166";
diff --git a/pkgs/development/python-modules/isodate/default.nix b/pkgs/development/python-modules/isodate/default.nix
index d2098a83c95e1..19a643d216ac8 100644
--- a/pkgs/development/python-modules/isodate/default.nix
+++ b/pkgs/development/python-modules/isodate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/itsdangerous/default.nix b/pkgs/development/python-modules/itsdangerous/default.nix
index e89786d4e18d4..d1669a1ed5bf5 100644
--- a/pkgs/development/python-modules/itsdangerous/default.nix
+++ b/pkgs/development/python-modules/itsdangerous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/itypes/default.nix b/pkgs/development/python-modules/itypes/default.nix
index 417d1a20b3bfd..1b68454724045 100644
--- a/pkgs/development/python-modules/itypes/default.nix
+++ b/pkgs/development/python-modules/itypes/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchFromGitHub,
   buildPythonPackage,
   pytest,
diff --git a/pkgs/development/python-modules/j2cli/default.nix b/pkgs/development/python-modules/j2cli/default.nix
index 14cf18ae694fd..d6efe84edfd6b 100644
--- a/pkgs/development/python-modules/j2cli/default.nix
+++ b/pkgs/development/python-modules/j2cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , jinja2
diff --git a/pkgs/development/python-modules/jabberbot/default.nix b/pkgs/development/python-modules/jabberbot/default.nix
index 4c625d944859f..d00ccd06c8d67 100644
--- a/pkgs/development/python-modules/jabberbot/default.nix
+++ b/pkgs/development/python-modules/jabberbot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, xmpppy }:
 
 buildPythonPackage rec {
   pname = "jabberbot";
diff --git a/pkgs/development/python-modules/jc/default.nix b/pkgs/development/python-modules/jc/default.nix
index 6f120fa6ea2e4..b4590ed28d3f2 100644
--- a/pkgs/development/python-modules/jc/default.nix
+++ b/pkgs/development/python-modules/jc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ruamel_yaml
diff --git a/pkgs/development/python-modules/jdatetime/default.nix b/pkgs/development/python-modules/jdatetime/default.nix
index d4aa49c3ca3cb..90f7c310faa84 100644
--- a/pkgs/development/python-modules/jdatetime/default.nix
+++ b/pkgs/development/python-modules/jdatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "jdatetime";
diff --git a/pkgs/development/python-modules/jedi/default.nix b/pkgs/development/python-modules/jedi/default.nix
index 6e833a7746048..305b9f6c6b6be 100644
--- a/pkgs/development/python-modules/jedi/default.nix
+++ b/pkgs/development/python-modules/jedi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/python-modules/jinja2_pluralize/default.nix b/pkgs/development/python-modules/jinja2_pluralize/default.nix
index 0a6d0c365a04e..db196403822ad 100644
--- a/pkgs/development/python-modules/jinja2_pluralize/default.nix
+++ b/pkgs/development/python-modules/jinja2_pluralize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, inflect }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, inflect }:
 
 buildPythonPackage rec {
   pname = "jinja2_pluralize";
diff --git a/pkgs/development/python-modules/jinja2_time/default.nix b/pkgs/development/python-modules/jinja2_time/default.nix
index 7887fe96f75e5..4268413fd3f5d 100644
--- a/pkgs/development/python-modules/jinja2_time/default.nix
+++ b/pkgs/development/python-modules/jinja2_time/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , arrow
diff --git a/pkgs/development/python-modules/jmespath/default.nix b/pkgs/development/python-modules/jmespath/default.nix
index 3b31700de0ebe..3f74ae8d810e5 100644
--- a/pkgs/development/python-modules/jmespath/default.nix
+++ b/pkgs/development/python-modules/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/jpylyzer/default.nix b/pkgs/development/python-modules/jpylyzer/default.nix
index c5c9cdf15056d..6f9ceb96e3f5a 100644
--- a/pkgs/development/python-modules/jpylyzer/default.nix
+++ b/pkgs/development/python-modules/jpylyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , six
diff --git a/pkgs/development/python-modules/jsonfield/default.nix b/pkgs/development/python-modules/jsonfield/default.nix
index 07ee609d65344..6b7faf9a312d7 100644
--- a/pkgs/development/python-modules/jsonfield/default.nix
+++ b/pkgs/development/python-modules/jsonfield/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
+{ lib, fetchPypi, buildPythonPackage, django, pytestCheckHook, pytest-django }:
 
 buildPythonPackage rec {
   pname = "jsonfield";
diff --git a/pkgs/development/python-modules/jsonpath_rw/default.nix b/pkgs/development/python-modules/jsonpath_rw/default.nix
index 81a6eb3fb27b9..d2b177c742ab9 100644
--- a/pkgs/development/python-modules/jsonpath_rw/default.nix
+++ b/pkgs/development/python-modules/jsonpath_rw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/jsonref/default.nix b/pkgs/development/python-modules/jsonref/default.nix
index b901d811a2301..3154f63f3181c 100644
--- a/pkgs/development/python-modules/jsonref/default.nix
+++ b/pkgs/development/python-modules/jsonref/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-async/default.nix b/pkgs/development/python-modules/jsonrpc-async/default.nix
index 0b77db5df4e6e..00f0d748bbb00 100644
--- a/pkgs/development/python-modules/jsonrpc-async/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/jsonrpc-base/default.nix b/pkgs/development/python-modules/jsonrpc-base/default.nix
index cc4bd1b2f6861..db47a2240fb6c 100644
--- a/pkgs/development/python-modules/jsonrpc-base/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "jsonrpc-base";
diff --git a/pkgs/development/python-modules/jsonrpc-websocket/default.nix b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
index d14d382f013cb..bf8960ad27d99 100644
--- a/pkgs/development/python-modules/jsonrpc-websocket/default.nix
+++ b/pkgs/development/python-modules/jsonrpc-websocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , aiohttp, jsonrpc-base, pep8
 , pytestCheckHook
 , pytest-asyncio
diff --git a/pkgs/development/python-modules/jsonwatch/default.nix b/pkgs/development/python-modules/jsonwatch/default.nix
index feced94422575..7b08572d23196 100644
--- a/pkgs/development/python-modules/jsonwatch/default.nix
+++ b/pkgs/development/python-modules/jsonwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , six
diff --git a/pkgs/development/python-modules/jug/default.nix b/pkgs/development/python-modules/jug/default.nix
index eff6accaa0248..7646c007818cb 100644
--- a/pkgs/development/python-modules/jug/default.nix
+++ b/pkgs/development/python-modules/jug/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ lib, buildPythonPackage, fetchPypi, fetchpatch
 , nose, numpy
 , bottle, pyyaml, redis, six
 , zlib
diff --git a/pkgs/development/python-modules/junos-eznc/default.nix b/pkgs/development/python-modules/junos-eznc/default.nix
index d9234d836b0f2..60ec37dbde970 100644
--- a/pkgs/development/python-modules/junos-eznc/default.nix
+++ b/pkgs/development/python-modules/junos-eznc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/jupyter-repo2docker/default.nix b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
index f01605513cb6f..5d8060d1944e1 100644
--- a/pkgs/development/python-modules/jupyter-repo2docker/default.nix
+++ b/pkgs/development/python-modules/jupyter-repo2docker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast
 , docker
 , escapism
 , jinja2
diff --git a/pkgs/development/python-modules/jupyter-telemetry/default.nix b/pkgs/development/python-modules/jupyter-telemetry/default.nix
index 0f0c0d346e6a2..9dddd8ec5684a 100644
--- a/pkgs/development/python-modules/jupyter-telemetry/default.nix
+++ b/pkgs/development/python-modules/jupyter-telemetry/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/jupyter/default.nix b/pkgs/development/python-modules/jupyter/default.nix
index 03d28bbf55d6b..818623c2513bd 100644
--- a/pkgs/development/python-modules/jupyter/default.nix
+++ b/pkgs/development/python-modules/jupyter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/jupyterlab_server/default.nix b/pkgs/development/python-modules/jupyterlab_server/default.nix
index bfbd1cc89e089..3d9b5b9f831b7 100644
--- a/pkgs/development/python-modules/jupyterlab_server/default.nix
+++ b/pkgs/development/python-modules/jupyterlab_server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , notebook
diff --git a/pkgs/development/python-modules/kaa-base/default.nix b/pkgs/development/python-modules/kaa-base/default.nix
index 24a02f7f696a8..5b789f5eda8c3 100644
--- a/pkgs/development/python-modules/kaa-base/default.nix
+++ b/pkgs/development/python-modules/kaa-base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/kaa-metadata/default.nix b/pkgs/development/python-modules/kaa-metadata/default.nix
index 5164004e8ea58..5a50d9e9c0a6a 100644
--- a/pkgs/development/python-modules/kaa-metadata/default.nix
+++ b/pkgs/development/python-modules/kaa-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kaa-base
diff --git a/pkgs/development/python-modules/kafka-python/default.nix b/pkgs/development/python-modules/kafka-python/default.nix
index b147b30c2ce39..d8f37f563d4a7 100644
--- a/pkgs/development/python-modules/kafka-python/default.nix
+++ b/pkgs/development/python-modules/kafka-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, six, mock }:
+{ lib, buildPythonPackage, fetchPypi, pytest, six, mock }:
 
 buildPythonPackage rec {
   version = "2.0.2";
diff --git a/pkgs/development/python-modules/kaitaistruct/default.nix b/pkgs/development/python-modules/kaitaistruct/default.nix
index 866042b6942ce..1050ae88e4301 100644
--- a/pkgs/development/python-modules/kaitaistruct/default.nix
+++ b/pkgs/development/python-modules/kaitaistruct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "kaitaistruct";
diff --git a/pkgs/development/python-modules/kajiki/default.nix b/pkgs/development/python-modules/kajiki/default.nix
index 2a45404919c0a..471ee4416b622 100644
--- a/pkgs/development/python-modules/kajiki/default.nix
+++ b/pkgs/development/python-modules/kajiki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , Babel
diff --git a/pkgs/development/python-modules/kaptan/default.nix b/pkgs/development/python-modules/kaptan/default.nix
index dea22059f096f..c5f00393839e5 100644
--- a/pkgs/development/python-modules/kaptan/default.nix
+++ b/pkgs/development/python-modules/kaptan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyyaml
diff --git a/pkgs/development/python-modules/kazoo/default.nix b/pkgs/development/python-modules/kazoo/default.nix
index d8743776578e4..31b65023371e0 100644
--- a/pkgs/development/python-modules/kazoo/default.nix
+++ b/pkgs/development/python-modules/kazoo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/keep/default.nix b/pkgs/development/python-modules/keep/default.nix
index 22ae853c043c1..5a70dcb4676d4 100644
--- a/pkgs/development/python-modules/keep/default.nix
+++ b/pkgs/development/python-modules/keep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , PyGithub
diff --git a/pkgs/development/python-modules/keepalive/default.nix b/pkgs/development/python-modules/keepalive/default.nix
index 7a488edf895d5..b6daec6ca2006 100644
--- a/pkgs/development/python-modules/keepalive/default.nix
+++ b/pkgs/development/python-modules/keepalive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/keepkey/default.nix b/pkgs/development/python-modules/keepkey/default.nix
index 437a0193c61d0..6b4568cd748dc 100644
--- a/pkgs/development/python-modules/keepkey/default.nix
+++ b/pkgs/development/python-modules/keepkey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest
+{ lib, fetchFromGitHub, buildPythonPackage, pytest
 , ecdsa , mnemonic, protobuf, hidapi, trezor }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/keepkey_agent/default.nix b/pkgs/development/python-modules/keepkey_agent/default.nix
index b9189cf4e1679..27ef7d8dbf483 100644
--- a/pkgs/development/python-modules/keepkey_agent/default.nix
+++ b/pkgs/development/python-modules/keepkey_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , keepkey
diff --git a/pkgs/development/python-modules/keras/default.nix b/pkgs/development/python-modules/keras/default.nix
index 7274d3d17a691..e90dd1a806aa1 100644
--- a/pkgs/development/python-modules/keras/default.nix
+++ b/pkgs/development/python-modules/keras/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, pytest_xdist
 , six, numpy, scipy, pyyaml, h5py
 , keras-applications, keras-preprocessing
diff --git a/pkgs/development/python-modules/kerberos/default.nix b/pkgs/development/python-modules/kerberos/default.nix
index 985339caed535..7a9ce3aab4486 100644
--- a/pkgs/development/python-modules/kerberos/default.nix
+++ b/pkgs/development/python-modules/kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kerberos
diff --git a/pkgs/development/python-modules/keyrings-alt/default.nix b/pkgs/development/python-modules/keyrings-alt/default.nix
index bc20ff4e37402..5b53d201a0b6c 100644
--- a/pkgs/development/python-modules/keyrings-alt/default.nix
+++ b/pkgs/development/python-modules/keyrings-alt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, isPy27, six
 , pytest, backports_unittest-mock, keyring, setuptools_scm, toml
 }:
 
diff --git a/pkgs/development/python-modules/kitchen/default.nix b/pkgs/development/python-modules/kitchen/default.nix
index 1a14b974114e5..0b6f41d2c1992 100644
--- a/pkgs/development/python-modules/kitchen/default.nix
+++ b/pkgs/development/python-modules/kitchen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "kitchen";
   version = "1.2.6";
diff --git a/pkgs/development/python-modules/knack/default.nix b/pkgs/development/python-modules/knack/default.nix
index dd45e96723135..c08bdab4cf347 100644
--- a/pkgs/development/python-modules/knack/default.nix
+++ b/pkgs/development/python-modules/knack/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , argcomplete
diff --git a/pkgs/development/python-modules/korean-lunar-calendar/default.nix b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
index 8ad94d955aec5..a1b22a727ad87 100644
--- a/pkgs/development/python-modules/korean-lunar-calendar/default.nix
+++ b/pkgs/development/python-modules/korean-lunar-calendar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/kubernetes/default.nix b/pkgs/development/python-modules/kubernetes/default.nix
index 1721807819687..f2cb598a6c9bd 100644
--- a/pkgs/development/python-modules/kubernetes/default.nix
+++ b/pkgs/development/python-modules/kubernetes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast,
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast,
   ipaddress, websocket_client, urllib3, pyyaml, requests_oauthlib, python-dateutil, google-auth, adal,
   isort, pytest, coverage, mock, sphinx, autopep8, pep8, codecov, recommonmark, nose }:
 
diff --git a/pkgs/development/python-modules/larch/default.nix b/pkgs/development/python-modules/larch/default.nix
index 7708bc0dbc029..630430b8270b7 100644
--- a/pkgs/development/python-modules/larch/default.nix
+++ b/pkgs/development/python-modules/larch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/lasagne/default.nix b/pkgs/development/python-modules/lasagne/default.nix
index 5bddf5cbe6f20..5db149708ff31 100644
--- a/pkgs/development/python-modules/lasagne/default.nix
+++ b/pkgs/development/python-modules/lasagne/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/lazy-object-proxy/default.nix b/pkgs/development/python-modules/lazy-object-proxy/default.nix
index 63784b4005bb1..82a784cfe3c68 100644
--- a/pkgs/development/python-modules/lazy-object-proxy/default.nix
+++ b/pkgs/development/python-modules/lazy-object-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/lazy_import/default.nix b/pkgs/development/python-modules/lazy_import/default.nix
index 1bc52b3a65c8f..60eba0577b035 100644
--- a/pkgs/development/python-modules/lazy_import/default.nix
+++ b/pkgs/development/python-modules/lazy_import/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest
 , pytest_xdist
 , six }:
diff --git a/pkgs/development/python-modules/ldap3/default.nix b/pkgs/development/python-modules/ldap3/default.nix
index e1accc4d177e5..71af0d294a2d2 100644
--- a/pkgs/development/python-modules/ldap3/default.nix
+++ b/pkgs/development/python-modules/ldap3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "ldap3";
diff --git a/pkgs/development/python-modules/le/default.nix b/pkgs/development/python-modules/le/default.nix
index 6415b255c7167..d42527ae97a96 100644
--- a/pkgs/development/python-modules/le/default.nix
+++ b/pkgs/development/python-modules/le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/leather/default.nix b/pkgs/development/python-modules/leather/default.nix
index 99c1f080a0315..197e88e8e8b25 100644
--- a/pkgs/development/python-modules/leather/default.nix
+++ b/pkgs/development/python-modules/leather/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "leather";
diff --git a/pkgs/development/python-modules/ledger_agent/default.nix b/pkgs/development/python-modules/ledger_agent/default.nix
index 4fc935799c317..8a0ace1264580 100644
--- a/pkgs/development/python-modules/ledger_agent/default.nix
+++ b/pkgs/development/python-modules/ledger_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ledgerblue
diff --git a/pkgs/development/python-modules/ledgerblue/default.nix b/pkgs/development/python-modules/ledgerblue/default.nix
index f853dfbf01f9b..fe94753f1a627 100644
--- a/pkgs/development/python-modules/ledgerblue/default.nix
+++ b/pkgs/development/python-modules/ledgerblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, hidapi
+{ lib, fetchPypi, buildPythonPackage, hidapi
 , pycrypto, pillow, protobuf, future, ecpy, python-u2flib-host, pycryptodomex
 , websocket_client
 }:
diff --git a/pkgs/development/python-modules/libagent/default.nix b/pkgs/development/python-modules/libagent/default.nix
index debe88f2f6cc5..47be977755cdf 100644
--- a/pkgs/development/python-modules/libagent/default.nix
+++ b/pkgs/development/python-modules/libagent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
+{ lib, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic,
   unidecode, mock, pytest , backports-shutil-which, ConfigArgParse,
   python-daemon, pymsgbox }:
 
diff --git a/pkgs/development/python-modules/libais/default.nix b/pkgs/development/python-modules/libais/default.nix
index eb1ce861dd266..33710c6682dc6 100644
--- a/pkgs/development/python-modules/libais/default.nix
+++ b/pkgs/development/python-modules/libais/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   six, pytest, pytestrunner, pytestcov, coverage
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index 5a5116de54783..6e5d8f771e8b3 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub
+{ lib, buildPythonPackage, python, fetchFromGitHub
 , cmake, sip, protobuf, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libasyncns/default.nix b/pkgs/development/python-modules/libasyncns/default.nix
index fc45622a671d7..38ca9b26360c6 100644
--- a/pkgs/development/python-modules/libasyncns/default.nix
+++ b/pkgs/development/python-modules/libasyncns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl
+{ lib, buildPythonPackage, fetchurl
 , libasyncns, pkg-config }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/libkeepass/default.nix b/pkgs/development/python-modules/libkeepass/default.nix
index cfc687e37c148..aa922db9c1024 100644
--- a/pkgs/development/python-modules/libkeepass/default.nix
+++ b/pkgs/development/python-modules/libkeepass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , lxml, pycryptodome, colorama }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/liblarch/default.nix b/pkgs/development/python-modules/liblarch/default.nix
index b824dec172edf..5ff8d25d54b51 100644
--- a/pkgs/development/python-modules/liblarch/default.nix
+++ b/pkgs/development/python-modules/liblarch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/libmr/default.nix b/pkgs/development/python-modules/libmr/default.nix
index a0ef924e56e6b..d775cc7b245b0 100644
--- a/pkgs/development/python-modules/libmr/default.nix
+++ b/pkgs/development/python-modules/libmr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "libmr";
diff --git a/pkgs/development/python-modules/librosa/default.nix b/pkgs/development/python-modules/librosa/default.nix
index 777eed4ddb330..ce8f2a73fa7ff 100644
--- a/pkgs/development/python-modules/librosa/default.nix
+++ b/pkgs/development/python-modules/librosa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , joblib
diff --git a/pkgs/development/python-modules/libsavitar/default.nix b/pkgs/development/python-modules/libsavitar/default.nix
index 559289987e6c5..7ef22e3f6ee50 100644
--- a/pkgs/development/python-modules/libsavitar/default.nix
+++ b/pkgs/development/python-modules/libsavitar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
+{ lib, buildPythonPackage, python, pythonOlder, fetchFromGitHub, cmake, sip }:
 
 buildPythonPackage rec {
   pname = "libsavitar";
diff --git a/pkgs/development/python-modules/libsoundtouch/default.nix b/pkgs/development/python-modules/libsoundtouch/default.nix
index 40f1b2f8e9ca3..a4f98ffada81e 100644
--- a/pkgs/development/python-modules/libsoundtouch/default.nix
+++ b/pkgs/development/python-modules/libsoundtouch/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, stdenv
+
 , lib
 , pythonOlder
 , requests
diff --git a/pkgs/development/python-modules/libthumbor/default.nix b/pkgs/development/python-modules/libthumbor/default.nix
index 72e62514a5263..c3d8ec9526ffa 100644
--- a/pkgs/development/python-modules/libthumbor/default.nix
+++ b/pkgs/development/python-modules/libthumbor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/libtmux/default.nix b/pkgs/development/python-modules/libtmux/default.nix
index df9728eb334b6..e019951f6ff12 100644
--- a/pkgs/development/python-modules/libtmux/default.nix
+++ b/pkgs/development/python-modules/libtmux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "libtmux";
diff --git a/pkgs/development/python-modules/libversion/default.nix b/pkgs/development/python-modules/libversion/default.nix
index d54a176f68623..2edc9211d928d 100644
--- a/pkgs/development/python-modules/libversion/default.nix
+++ b/pkgs/development/python-modules/libversion/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libversion, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "libversion";
diff --git a/pkgs/development/python-modules/libvirt/5.9.0.nix b/pkgs/development/python-modules/libvirt/5.9.0.nix
index 1134d4f1c57b6..bfc6b711ab207 100644
--- a/pkgs/development/python-modules/libvirt/5.9.0.nix
+++ b/pkgs/development/python-modules/libvirt/5.9.0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchgit, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/libvirt/default.nix b/pkgs/development/python-modules/libvirt/default.nix
index d29cf5a7a85f8..ee2d88b4c0497 100644
--- a/pkgs/development/python-modules/libvirt/default.nix
+++ b/pkgs/development/python-modules/libvirt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
+{ lib, buildPythonPackage, fetchFromGitLab, pkg-config, lxml, libvirt, nose }:
 
 buildPythonPackage rec {
   pname = "libvirt";
diff --git a/pkgs/development/python-modules/lightblue/default.nix b/pkgs/development/python-modules/lightblue/default.nix
index 3e85a3cfaa049..feb2718124431 100644
--- a/pkgs/development/python-modules/lightblue/default.nix
+++ b/pkgs/development/python-modules/lightblue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pkgs
diff --git a/pkgs/development/python-modules/lightning/default.nix b/pkgs/development/python-modules/lightning/default.nix
index 782bd41413eb9..f6d21f95dbfc1 100644
--- a/pkgs/development/python-modules/lightning/default.nix
+++ b/pkgs/development/python-modules/lightning/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/limits/default.nix b/pkgs/development/python-modules/limits/default.nix
index e1cd31867de4a..fc6982440d63e 100644
--- a/pkgs/development/python-modules/limits/default.nix
+++ b/pkgs/development/python-modules/limits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, six }:
+{ lib, fetchPypi, buildPythonPackage, six }:
 
 buildPythonPackage rec {
   pname = "limits";
diff --git a/pkgs/development/python-modules/limnoria/default.nix b/pkgs/development/python-modules/limnoria/default.nix
index c92e014e98989..ff7ac9fb3f993 100644
--- a/pkgs/development/python-modules/limnoria/default.nix
+++ b/pkgs/development/python-modules/limnoria/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/linecache2/default.nix b/pkgs/development/python-modules/linecache2/default.nix
index 3945ec5001cd8..3c2238b0875de 100644
--- a/pkgs/development/python-modules/linecache2/default.nix
+++ b/pkgs/development/python-modules/linecache2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/linode-api/default.nix b/pkgs/development/python-modules/linode-api/default.nix
index 61624a64d66af..7df182d94fed8 100644
--- a/pkgs/development/python-modules/linode-api/default.nix
+++ b/pkgs/development/python-modules/linode-api/default.nix
@@ -1,4 +1,4 @@
-{ stdenv,
+{
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
diff --git a/pkgs/development/python-modules/linode/default.nix b/pkgs/development/python-modules/linode/default.nix
index 611b91bb93098..3433c0e5717cb 100644
--- a/pkgs/development/python-modules/linode/default.nix
+++ b/pkgs/development/python-modules/linode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/livelossplot/default.nix b/pkgs/development/python-modules/livelossplot/default.nix
index bbf1b966bf1ee..2951ab7a427b8 100644
--- a/pkgs/development/python-modules/livelossplot/default.nix
+++ b/pkgs/development/python-modules/livelossplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/livestreamer-curses/default.nix b/pkgs/development/python-modules/livestreamer-curses/default.nix
index d76eb736ac739..5f17a70061770 100644
--- a/pkgs/development/python-modules/livestreamer-curses/default.nix
+++ b/pkgs/development/python-modules/livestreamer-curses/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/livestreamer/default.nix b/pkgs/development/python-modules/livestreamer/default.nix
index 7ae9124bb82cb..184a215c407aa 100644
--- a/pkgs/development/python-modules/livestreamer/default.nix
+++ b/pkgs/development/python-modules/livestreamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pkgs
 , isPyPy
diff --git a/pkgs/development/python-modules/lmdb/default.nix b/pkgs/development/python-modules/lmdb/default.nix
index 20020b97ef230..f3e7a86a2aaea 100644
--- a/pkgs/development/python-modules/lmdb/default.nix
+++ b/pkgs/development/python-modules/lmdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/lmtpd/default.nix b/pkgs/development/python-modules/lmtpd/default.nix
index 3a1beba29d400..bb27c29173b1e 100644
--- a/pkgs/development/python-modules/lmtpd/default.nix
+++ b/pkgs/development/python-modules/lmtpd/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, isPy3k, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, isPy3k, lib }:
 
 buildPythonPackage rec {
   pname = "lmtpd";
diff --git a/pkgs/development/python-modules/localzone/default.nix b/pkgs/development/python-modules/localzone/default.nix
index 8690b1e4c91e7..0960a824817a7 100644
--- a/pkgs/development/python-modules/localzone/default.nix
+++ b/pkgs/development/python-modules/localzone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , dnspython
diff --git a/pkgs/development/python-modules/locket/default.nix b/pkgs/development/python-modules/locket/default.nix
index 45985a17d3e9c..e0be7d8f94407 100644
--- a/pkgs/development/python-modules/locket/default.nix
+++ b/pkgs/development/python-modules/locket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "locket";
diff --git a/pkgs/development/python-modules/logilab/common.nix b/pkgs/development/python-modules/logilab/common.nix
index b7ba746d79ee0..a1cb1b248ae35 100644
--- a/pkgs/development/python-modules/logilab/common.nix
+++ b/pkgs/development/python-modules/logilab/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, unittest2, six }:
 
 buildPythonPackage rec {
   pname = "logilab-common";
diff --git a/pkgs/development/python-modules/logilab/constraint.nix b/pkgs/development/python-modules/logilab/constraint.nix
index 9a071b5cf5f98..bbc65a51c3c31 100644
--- a/pkgs/development/python-modules/logilab/constraint.nix
+++ b/pkgs/development/python-modules/logilab/constraint.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, logilab_common, six }:
+{ lib, buildPythonPackage, fetchPypi, logilab_common, six }:
 
 buildPythonPackage rec {
   pname = "logilab-constraint";
diff --git a/pkgs/development/python-modules/logilab_astng/default.nix b/pkgs/development/python-modules/logilab_astng/default.nix
index 15cea1d7baaa3..dac5862324abb 100644
--- a/pkgs/development/python-modules/logilab_astng/default.nix
+++ b/pkgs/development/python-modules/logilab_astng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , logilab_common
diff --git a/pkgs/development/python-modules/logutils/default.nix b/pkgs/development/python-modules/logutils/default.nix
index d49667d7cc8af..0a49262647e9d 100644
--- a/pkgs/development/python-modules/logutils/default.nix
+++ b/pkgs/development/python-modules/logutils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/lpod/default.nix b/pkgs/development/python-modules/lpod/default.nix
index 67b48cecd62ca..9c719d234f897 100644
--- a/pkgs/development/python-modules/lpod/default.nix
+++ b/pkgs/development/python-modules/lpod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , lxml
diff --git a/pkgs/development/python-modules/lsi/default.nix b/pkgs/development/python-modules/lsi/default.nix
index 0fca2f7b372f9..b570a62d9e344 100644
--- a/pkgs/development/python-modules/lsi/default.nix
+++ b/pkgs/development/python-modules/lsi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/lxc/default.nix b/pkgs/development/python-modules/lxc/default.nix
index a20db9dd5034a..4534e0a01ef39 100644
--- a/pkgs/development/python-modules/lxc/default.nix
+++ b/pkgs/development/python-modules/lxc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/lyricwikia/default.nix b/pkgs/development/python-modules/lyricwikia/default.nix
index 585c38ab33ec1..a5ea55c39cf58 100644
--- a/pkgs/development/python-modules/lyricwikia/default.nix
+++ b/pkgs/development/python-modules/lyricwikia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
+{ lib, fetchPypi, buildPythonPackage, pytestrunner, six, beautifulsoup4, requests, }:
 buildPythonPackage rec {
   pname = "lyricwikia";
   version = "0.1.11";
diff --git a/pkgs/development/python-modules/m2crypto/default.nix b/pkgs/development/python-modules/m2crypto/default.nix
index af07be47dcdce..8e214540b12d4 100644
--- a/pkgs/development/python-modules/m2crypto/default.nix
+++ b/pkgs/development/python-modules/m2crypto/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchpatch
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/m2r/default.nix b/pkgs/development/python-modules/m2r/default.nix
index 149e4d6ed5629..35331c14b08a7 100644
--- a/pkgs/development/python-modules/m2r/default.nix
+++ b/pkgs/development/python-modules/m2r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
   mistune, docutils } :
 buildPythonPackage rec {
   pname = "m2r";
diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
index 14ae268c03a0c..dfd16c04a6f8b 100644
--- a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, six, attrs, twisted, pyopenssl, service-identity, autobahn, treq, mock, pytest }:
 
 buildPythonPackage rec {
   version = "0.4.1";
diff --git a/pkgs/development/python-modules/mailcap-fix/default.nix b/pkgs/development/python-modules/mailcap-fix/default.nix
index 08991edce4aaf..da735d9d048de 100644
--- a/pkgs/development/python-modules/mailcap-fix/default.nix
+++ b/pkgs/development/python-modules/mailcap-fix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy36
diff --git a/pkgs/development/python-modules/mailchimp/default.nix b/pkgs/development/python-modules/mailchimp/default.nix
index 0032caa7a0a52..91563b7fe7ef9 100644
--- a/pkgs/development/python-modules/mailchimp/default.nix
+++ b/pkgs/development/python-modules/mailchimp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , docopt
diff --git a/pkgs/development/python-modules/mailman-hyperkitty/default.nix b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
index 8ab80e3371797..1d3b69f6bf24c 100644
--- a/pkgs/development/python-modules/mailman-hyperkitty/default.nix
+++ b/pkgs/development/python-modules/mailman-hyperkitty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mailman, mock }:
+{ lib, buildPythonPackage, fetchPypi, mailman, mock }:
 
 buildPythonPackage rec {
   pname = "mailman-hyperkitty";
diff --git a/pkgs/development/python-modules/mailman-rss/default.nix b/pkgs/development/python-modules/mailman-rss/default.nix
index 84c97eb16e2e3..e2043b0d6d4d2 100644
--- a/pkgs/development/python-modules/mailman-rss/default.nix
+++ b/pkgs/development/python-modules/mailman-rss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, withTwitter ? false}:
+{ lib, python3Packages, withTwitter ? false}:
 
 python3Packages.buildPythonApplication rec {
   pname = "mailman-rss";
diff --git a/pkgs/development/python-modules/mailmanclient/default.nix b/pkgs/development/python-modules/mailmanclient/default.nix
index 280ee95b83016..edc19f66f71b7 100644
--- a/pkgs/development/python-modules/mailmanclient/default.nix
+++ b/pkgs/development/python-modules/mailmanclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, six, httplib2, requests }:
 
 buildPythonPackage rec {
   pname = "mailmanclient";
diff --git a/pkgs/development/python-modules/manuel/default.nix b/pkgs/development/python-modules/manuel/default.nix
index 59243783ecf9e..2f14ed863c3eb 100644
--- a/pkgs/development/python-modules/manuel/default.nix
+++ b/pkgs/development/python-modules/manuel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/mapsplotlib/default.nix b/pkgs/development/python-modules/mapsplotlib/default.nix
index 54d0ade40f352..28a6e9c0c5c4d 100644
--- a/pkgs/development/python-modules/mapsplotlib/default.nix
+++ b/pkgs/development/python-modules/mapsplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/marionette-harness/mozinfo.nix b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
index b7d91cc16f52a..99f3afc31f615 100644
--- a/pkgs/development/python-modules/marionette-harness/mozinfo.nix
+++ b/pkgs/development/python-modules/marionette-harness/mozinfo.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/marisa/default.nix b/pkgs/development/python-modules/marisa/default.nix
index a30f7062df0a7..93a4ccb959f79 100644
--- a/pkgs/development/python-modules/marisa/default.nix
+++ b/pkgs/development/python-modules/marisa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, marisa, swig
+{ lib, buildPythonPackage, fetchFromGitHub, marisa, swig
 , isPy3k
 }:
 
diff --git a/pkgs/development/python-modules/markdown-macros/default.nix b/pkgs/development/python-modules/markdown-macros/default.nix
index e248bfe60cc44..e95cbe3c4c101 100644
--- a/pkgs/development/python-modules/markdown-macros/default.nix
+++ b/pkgs/development/python-modules/markdown-macros/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/markdown2/default.nix b/pkgs/development/python-modules/markdown2/default.nix
index 2f929012df89f..b1513d06e58be 100644
--- a/pkgs/development/python-modules/markdown2/default.nix
+++ b/pkgs/development/python-modules/markdown2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "markdown2";
diff --git a/pkgs/development/python-modules/markerlib/default.nix b/pkgs/development/python-modules/markerlib/default.nix
index d039198b3938f..7762a970fb1e3 100644
--- a/pkgs/development/python-modules/markerlib/default.nix
+++ b/pkgs/development/python-modules/markerlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/markupsafe/default.nix b/pkgs/development/python-modules/markupsafe/default.nix
index 6a6e06cd3177b..ae0878c7a9723 100644
--- a/pkgs/development/python-modules/markupsafe/default.nix
+++ b/pkgs/development/python-modules/markupsafe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/matrix-client/default.nix b/pkgs/development/python-modules/matrix-client/default.nix
index 34c99a1ebe1c2..b8439a0c23d49 100644
--- a/pkgs/development/python-modules/matrix-client/default.nix
+++ b/pkgs/development/python-modules/matrix-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/maya/default.nix b/pkgs/development/python-modules/maya/default.nix
index 9cd1019a03014..4a751a188c247 100644
--- a/pkgs/development/python-modules/maya/default.nix
+++ b/pkgs/development/python-modules/maya/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, fetchpatch, buildPythonPackage
+{ lib, fetchPypi, fetchpatch, buildPythonPackage
 , dateparser, humanize, pendulum, ruamel_yaml, tzlocal }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/mccabe/default.nix b/pkgs/development/python-modules/mccabe/default.nix
index 2886a436a00da..03343aec16e88 100644
--- a/pkgs/development/python-modules/mccabe/default.nix
+++ b/pkgs/development/python-modules/mccabe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "mccabe";
diff --git a/pkgs/development/python-modules/mdp/default.nix b/pkgs/development/python-modules/mdp/default.nix
index 5313cd8e89aa8..55a440e680896 100644
--- a/pkgs/development/python-modules/mdp/default.nix
+++ b/pkgs/development/python-modules/mdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, future, numpy }:
+{ lib, buildPythonPackage, fetchPypi, pytest, future, numpy }:
 
 buildPythonPackage rec {
   pname = "MDP";
diff --git a/pkgs/development/python-modules/mechanize/default.nix b/pkgs/development/python-modules/mechanize/default.nix
index e2d2269a43c0c..7eb119fa95599 100644
--- a/pkgs/development/python-modules/mechanize/default.nix
+++ b/pkgs/development/python-modules/mechanize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , html5lib
diff --git a/pkgs/development/python-modules/meinheld/default.nix b/pkgs/development/python-modules/meinheld/default.nix
index ce7f231680073..9cf02e4c88673 100644
--- a/pkgs/development/python-modules/meinheld/default.nix
+++ b/pkgs/development/python-modules/meinheld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, greenlet }:
+{ lib, fetchPypi, buildPythonPackage, greenlet }:
 
 buildPythonPackage rec {
   pname = "meinheld";
diff --git a/pkgs/development/python-modules/meld3/default.nix b/pkgs/development/python-modules/meld3/default.nix
index 8871bfdda4638..a751dbeac3fc4 100644
--- a/pkgs/development/python-modules/meld3/default.nix
+++ b/pkgs/development/python-modules/meld3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/meliae/default.nix b/pkgs/development/python-modules/meliae/default.nix
index d602e3d94fdc8..4c6aa746448e4 100644
--- a/pkgs/development/python-modules/meliae/default.nix
+++ b/pkgs/development/python-modules/meliae/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/memcached/default.nix b/pkgs/development/python-modules/memcached/default.nix
index b75bd31361de0..02f4bc3aa44bf 100644
--- a/pkgs/development/python-modules/memcached/default.nix
+++ b/pkgs/development/python-modules/memcached/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , fetchPypi
diff --git a/pkgs/development/python-modules/memory_profiler/default.nix b/pkgs/development/python-modules/memory_profiler/default.nix
index 28ff6b7c5e313..994863dbbc068 100644
--- a/pkgs/development/python-modules/memory_profiler/default.nix
+++ b/pkgs/development/python-modules/memory_profiler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 }:
 
diff --git a/pkgs/development/python-modules/mergedeep/default.nix b/pkgs/development/python-modules/mergedeep/default.nix
index bcbca34754855..cdd19beb68d9a 100644
--- a/pkgs/development/python-modules/mergedeep/default.nix
+++ b/pkgs/development/python-modules/mergedeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
+{ lib, buildPythonPackage, isPy27, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "mergedeep";
diff --git a/pkgs/development/python-modules/mesa/default.nix b/pkgs/development/python-modules/mesa/default.nix
index 5b97f972dad1a..aaf13a76530dd 100644
--- a/pkgs/development/python-modules/mesa/default.nix
+++ b/pkgs/development/python-modules/mesa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , cookiecutter, networkx , pandas, tornado, tqdm
 , pytest }:
 
diff --git a/pkgs/development/python-modules/metaphone/default.nix b/pkgs/development/python-modules/metaphone/default.nix
index 1c8557f15c415..d6b0c30c504ce 100644
--- a/pkgs/development/python-modules/metaphone/default.nix
+++ b/pkgs/development/python-modules/metaphone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, nose }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "metaphone";
diff --git a/pkgs/development/python-modules/mezzanine/default.nix b/pkgs/development/python-modules/mezzanine/default.nix
index 86deecb5d4f27..c157cd2a6be81 100644
--- a/pkgs/development/python-modules/mezzanine/default.nix
+++ b/pkgs/development/python-modules/mezzanine/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/micawber/default.nix b/pkgs/development/python-modules/micawber/default.nix
index 9d31dd378ac43..73f50d32a5f4f 100644
--- a/pkgs/development/python-modules/micawber/default.nix
+++ b/pkgs/development/python-modules/micawber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4 }:
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4 }:
 
 buildPythonPackage rec {
   pname = "micawber";
diff --git a/pkgs/development/python-modules/midiutil/default.nix b/pkgs/development/python-modules/midiutil/default.nix
index 5ac8d917d75db..d1cae8c780414 100644
--- a/pkgs/development/python-modules/midiutil/default.nix
+++ b/pkgs/development/python-modules/midiutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "MIDIUtil";
diff --git a/pkgs/development/python-modules/milc/default.nix b/pkgs/development/python-modules/milc/default.nix
index dc824d565474c..998f0a58b2ba7 100644
--- a/pkgs/development/python-modules/milc/default.nix
+++ b/pkgs/development/python-modules/milc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , appdirs
diff --git a/pkgs/development/python-modules/minimock/default.nix b/pkgs/development/python-modules/minimock/default.nix
index f154eabb744c9..faa836b71d7b7 100644
--- a/pkgs/development/python-modules/minimock/default.nix
+++ b/pkgs/development/python-modules/minimock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , nose
diff --git a/pkgs/development/python-modules/miniupnpc/default.nix b/pkgs/development/python-modules/miniupnpc/default.nix
index 7178405ab74c5..fe7a9f69691a0 100644
--- a/pkgs/development/python-modules/miniupnpc/default.nix
+++ b/pkgs/development/python-modules/miniupnpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "miniupnpc";
diff --git a/pkgs/development/python-modules/mlflow/default.nix b/pkgs/development/python-modules/mlflow/default.nix
index 89cc8f9914663..5ffde397337cb 100644
--- a/pkgs/development/python-modules/mlflow/default.nix
+++ b/pkgs/development/python-modules/mlflow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , alembic
 , click
 , cloudpickle
diff --git a/pkgs/development/python-modules/mlrose/default.nix b/pkgs/development/python-modules/mlrose/default.nix
index c3c7c55f292d9..40e3b6ce09532 100644
--- a/pkgs/development/python-modules/mlrose/default.nix
+++ b/pkgs/development/python-modules/mlrose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
+{ lib, isPy27, buildPythonPackage, fetchPypi, scikitlearn }:
 
 buildPythonPackage rec {
   pname = "mlrose";
diff --git a/pkgs/development/python-modules/mlxtend/default.nix b/pkgs/development/python-modules/mlxtend/default.nix
index 94af156d9afbc..35f55bb27930f 100644
--- a/pkgs/development/python-modules/mlxtend/default.nix
+++ b/pkgs/development/python-modules/mlxtend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/mmpython/default.nix b/pkgs/development/python-modules/mmpython/default.nix
index e40fc197a5bf9..64c270ca07228 100644
--- a/pkgs/development/python-modules/mmpython/default.nix
+++ b/pkgs/development/python-modules/mmpython/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/mockito/default.nix b/pkgs/development/python-modules/mockito/default.nix
index d7ca86b8ea308..69cdf7b56b093 100644
--- a/pkgs/development/python-modules/mockito/default.nix
+++ b/pkgs/development/python-modules/mockito/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, funcsigs, pytest, numpy }:
 
 buildPythonPackage rec {
   version = "1.2.2";
diff --git a/pkgs/development/python-modules/modestmaps/default.nix b/pkgs/development/python-modules/modestmaps/default.nix
index a7862ef5c678f..202589b7435c6 100644
--- a/pkgs/development/python-modules/modestmaps/default.nix
+++ b/pkgs/development/python-modules/modestmaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/mongodict/default.nix b/pkgs/development/python-modules/mongodict/default.nix
index 467093e84cebf..c2fbd6a7ad1b4 100644
--- a/pkgs/development/python-modules/mongodict/default.nix
+++ b/pkgs/development/python-modules/mongodict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymongo
diff --git a/pkgs/development/python-modules/moretools/default.nix b/pkgs/development/python-modules/moretools/default.nix
index d39f67a73113d..5a96682accdb7 100644
--- a/pkgs/development/python-modules/moretools/default.nix
+++ b/pkgs/development/python-modules/moretools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six, pathpy, zetup, pytest
 , decorator }:
 
diff --git a/pkgs/development/python-modules/moviepy/default.nix b/pkgs/development/python-modules/moviepy/default.nix
index 8bc984a52879a..4cd1fec3d8b25 100644
--- a/pkgs/development/python-modules/moviepy/default.nix
+++ b/pkgs/development/python-modules/moviepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/mox/default.nix b/pkgs/development/python-modules/mox/default.nix
index 94d4791224df2..380dbe594a5a9 100644
--- a/pkgs/development/python-modules/mox/default.nix
+++ b/pkgs/development/python-modules/mox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/mox3/default.nix b/pkgs/development/python-modules/mox3/default.nix
index 77a02ae8a733f..1883c9c8c0119 100644
--- a/pkgs/development/python-modules/mox3/default.nix
+++ b/pkgs/development/python-modules/mox3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mozsvc/default.nix b/pkgs/development/python-modules/mozsvc/default.nix
index 55afb1773fe33..0caa347edacf1 100644
--- a/pkgs/development/python-modules/mozsvc/default.nix
+++ b/pkgs/development/python-modules/mozsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/mpd/default.nix b/pkgs/development/python-modules/mpd/default.nix
index 212e6b5f13c40..b535144fac911 100644
--- a/pkgs/development/python-modules/mpd/default.nix
+++ b/pkgs/development/python-modules/mpd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mpd2/default.nix b/pkgs/development/python-modules/mpd2/default.nix
index 7fdf64c0e4b73..031f26c49972d 100644
--- a/pkgs/development/python-modules/mpd2/default.nix
+++ b/pkgs/development/python-modules/mpd2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/mpmath/default.nix b/pkgs/development/python-modules/mpmath/default.nix
index 86d55b34f0443..3569f6239f0f9 100644
--- a/pkgs/development/python-modules/mpmath/default.nix
+++ b/pkgs/development/python-modules/mpmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mrbob/default.nix b/pkgs/development/python-modules/mrbob/default.nix
index 64d0ce13a86d0..8921719a3ae20 100644
--- a/pkgs/development/python-modules/mrbob/default.nix
+++ b/pkgs/development/python-modules/mrbob/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, glibcLocales, mock, nose, isPy3k, jinja2, six
+{ buildPythonPackage, lib, glibcLocales, mock, nose, isPy3k, jinja2, six
 , fetchPypi
 }:
 
diff --git a/pkgs/development/python-modules/msgpack-numpy/default.nix b/pkgs/development/python-modules/msgpack-numpy/default.nix
index 56bfa06a628a7..8b50e04d42894 100644
--- a/pkgs/development/python-modules/msgpack-numpy/default.nix
+++ b/pkgs/development/python-modules/msgpack-numpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/msrplib/default.nix b/pkgs/development/python-modules/msrplib/default.nix
index 16c4cc0f43ae7..e615b3e34e2cc 100644
--- a/pkgs/development/python-modules/msrplib/default.nix
+++ b/pkgs/development/python-modules/msrplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , eventlib
diff --git a/pkgs/development/python-modules/multi_key_dict/default.nix b/pkgs/development/python-modules/multi_key_dict/default.nix
index f76cde9bec537..cb539e4dd90f6 100644
--- a/pkgs/development/python-modules/multi_key_dict/default.nix
+++ b/pkgs/development/python-modules/multi_key_dict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/munch/default.nix b/pkgs/development/python-modules/munch/default.nix
index 2ff2ce4cefb97..f6ca7c1d69055 100644
--- a/pkgs/development/python-modules/munch/default.nix
+++ b/pkgs/development/python-modules/munch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/munkres/default.nix b/pkgs/development/python-modules/munkres/default.nix
index cb88b666cfa04..ffb4f87749062 100644
--- a/pkgs/development/python-modules/munkres/default.nix
+++ b/pkgs/development/python-modules/munkres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/murmurhash/default.nix b/pkgs/development/python-modules/murmurhash/default.nix
index 68aa29a6edeb5..c2a7eb1933777 100644
--- a/pkgs/development/python-modules/murmurhash/default.nix
+++ b/pkgs/development/python-modules/murmurhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/musicbrainzngs/default.nix b/pkgs/development/python-modules/musicbrainzngs/default.nix
index 02ec381571174..e5f5eff6b2844 100644
--- a/pkgs/development/python-modules/musicbrainzngs/default.nix
+++ b/pkgs/development/python-modules/musicbrainzngs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/mutag/default.nix b/pkgs/development/python-modules/mutag/default.nix
index 45725c0fabb71..ee190008f592b 100644
--- a/pkgs/development/python-modules/mutag/default.nix
+++ b/pkgs/development/python-modules/mutag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/muttils/default.nix b/pkgs/development/python-modules/muttils/default.nix
index 1d6b5ce8df442..98f96d1321233 100644
--- a/pkgs/development/python-modules/muttils/default.nix
+++ b/pkgs/development/python-modules/muttils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/mwclient/default.nix b/pkgs/development/python-modules/mwclient/default.nix
index ac9373b574ac0..2eed1eefeec8d 100644
--- a/pkgs/development/python-modules/mwclient/default.nix
+++ b/pkgs/development/python-modules/mwclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , requests, requests_oauthlib, six
 , pytest, pytestcache, pytestcov, responses, mock
 }:
diff --git a/pkgs/development/python-modules/mwlib-ext/default.nix b/pkgs/development/python-modules/mwlib-ext/default.nix
index 0a81fd58d7ee8..b9b18eaf9e5f1 100644
--- a/pkgs/development/python-modules/mwlib-ext/default.nix
+++ b/pkgs/development/python-modules/mwlib-ext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwlib-rl/default.nix b/pkgs/development/python-modules/mwlib-rl/default.nix
index d27de2ed45cc6..fdb70726eb6e2 100644
--- a/pkgs/development/python-modules/mwlib-rl/default.nix
+++ b/pkgs/development/python-modules/mwlib-rl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mwlib
diff --git a/pkgs/development/python-modules/mwlib/default.nix b/pkgs/development/python-modules/mwlib/default.nix
index e9defe3ee1488..d9edb2ef3ba5b 100644
--- a/pkgs/development/python-modules/mwlib/default.nix
+++ b/pkgs/development/python-modules/mwlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/mwparserfromhell/default.nix b/pkgs/development/python-modules/mwparserfromhell/default.nix
index 0546688b867ef..56aa46615162a 100644
--- a/pkgs/development/python-modules/mwparserfromhell/default.nix
+++ b/pkgs/development/python-modules/mwparserfromhell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/mypy-protobuf/default.nix b/pkgs/development/python-modules/mypy-protobuf/default.nix
index f444ba039c207..69178edb69193 100644
--- a/pkgs/development/python-modules/mypy-protobuf/default.nix
+++ b/pkgs/development/python-modules/mypy-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonApplication, protobuf }:
+{ lib, fetchPypi, buildPythonApplication, protobuf }:
 
 buildPythonApplication rec {
   pname = "mypy-protobuf";
diff --git a/pkgs/development/python-modules/mypy/extensions.nix b/pkgs/development/python-modules/mypy/extensions.nix
index 21a3ee21dbd92..5992a6815d8e4 100644
--- a/pkgs/development/python-modules/mypy/extensions.nix
+++ b/pkgs/development/python-modules/mypy/extensions.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, typing, pythonOlder }:
+{ lib, fetchPypi, buildPythonPackage, typing, pythonOlder }:
 
 buildPythonPackage rec {
   pname = "mypy-extensions";
diff --git a/pkgs/development/python-modules/mysqlclient/default.nix b/pkgs/development/python-modules/mysqlclient/default.nix
index 9d91543b7ff3c..b7a0f39990ea4 100644
--- a/pkgs/development/python-modules/mysqlclient/default.nix
+++ b/pkgs/development/python-modules/mysqlclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libmysqlclient }:
+{ lib, buildPythonPackage, fetchPypi, libmysqlclient }:
 
 buildPythonPackage rec {
   pname = "mysqlclient";
diff --git a/pkgs/development/python-modules/namebench/default.nix b/pkgs/development/python-modules/namebench/default.nix
index eefdcce799019..b7b542b8a7a9b 100644
--- a/pkgs/development/python-modules/namebench/default.nix
+++ b/pkgs/development/python-modules/namebench/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , isPyPy
diff --git a/pkgs/development/python-modules/nameparser/default.nix b/pkgs/development/python-modules/nameparser/default.nix
index 0c8e442affcf7..0d7b53f03cbe0 100644
--- a/pkgs/development/python-modules/nameparser/default.nix
+++ b/pkgs/development/python-modules/nameparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/nanoleaf/default.nix b/pkgs/development/python-modules/nanoleaf/default.nix
index f6131cd53095b..8712c582bedc3 100644
--- a/pkgs/development/python-modules/nanoleaf/default.nix
+++ b/pkgs/development/python-modules/nanoleaf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "nanoleaf";
diff --git a/pkgs/development/python-modules/nanomsg-python/default.nix b/pkgs/development/python-modules/nanomsg-python/default.nix
index 4cf33fb2074cf..765941457d4ab 100644
--- a/pkgs/development/python-modules/nanomsg-python/default.nix
+++ b/pkgs/development/python-modules/nanomsg-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nanomsg }:
+{ lib, buildPythonPackage, fetchFromGitHub, nanomsg }:
 
 buildPythonPackage {
   pname = "nanomsg-python";
diff --git a/pkgs/development/python-modules/nbclient/default.nix b/pkgs/development/python-modules/nbclient/default.nix
index d846511eb3f41..c320415e07549 100644
--- a/pkgs/development/python-modules/nbclient/default.nix
+++ b/pkgs/development/python-modules/nbclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder,
+{ lib, buildPythonPackage, fetchPypi, pythonOlder,
   async_generator, traitlets, nbformat, nest-asyncio, jupyter_client,
   pytest, xmltodict, nbconvert, ipywidgets
 , doCheck ? true
diff --git a/pkgs/development/python-modules/nbxmpp/default.nix b/pkgs/development/python-modules/nbxmpp/default.nix
index 28946bd1a6e79..3826a746758f0 100644
--- a/pkgs/development/python-modules/nbxmpp/default.nix
+++ b/pkgs/development/python-modules/nbxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
+{ lib, buildPythonPackage, fetchzip, gobject-introspection, idna, libsoup, precis-i18n, pygobject3, pyopenssl }:
 
 let
   pname = "nbxmpp";
diff --git a/pkgs/development/python-modules/ncclient/default.nix b/pkgs/development/python-modules/ncclient/default.nix
index f933587dcad14..ba3b9e4b0873a 100644
--- a/pkgs/development/python-modules/ncclient/default.nix
+++ b/pkgs/development/python-modules/ncclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/ndg-httpsclient/default.nix b/pkgs/development/python-modules/ndg-httpsclient/default.nix
index 7768614a5d12a..0082b8e8db239 100644
--- a/pkgs/development/python-modules/ndg-httpsclient/default.nix
+++ b/pkgs/development/python-modules/ndg-httpsclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyopenssl
diff --git a/pkgs/development/python-modules/netaddr/default.nix b/pkgs/development/python-modules/netaddr/default.nix
index 7f4aab9c37148..3f7f78a374cbe 100644
--- a/pkgs/development/python-modules/netaddr/default.nix
+++ b/pkgs/development/python-modules/netaddr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/netcdf4/default.nix b/pkgs/development/python-modules/netcdf4/default.nix
index 456124b19bd37..60f7dbe6c239f 100644
--- a/pkgs/development/python-modules/netcdf4/default.nix
+++ b/pkgs/development/python-modules/netcdf4/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, isPyPy, pytest
+{ lib, buildPythonPackage, fetchPypi, isPyPy, pytest
 , numpy, zlib, netcdf, hdf5, curl, libjpeg, cython, cftime
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/netdisco/default.nix b/pkgs/development/python-modules/netdisco/default.nix
index e546ac6cd579c..489b6bddf5626 100644
--- a/pkgs/development/python-modules/netdisco/default.nix
+++ b/pkgs/development/python-modules/netdisco/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi, requests, zeroconf, netifaces, pytest }:
 
 buildPythonPackage rec {
   pname = "netdisco";
diff --git a/pkgs/development/python-modules/netifaces/default.nix b/pkgs/development/python-modules/netifaces/default.nix
index 07dc63c2181fe..f7638b29a4c20 100644
--- a/pkgs/development/python-modules/netifaces/default.nix
+++ b/pkgs/development/python-modules/netifaces/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/neuronpy/default.nix b/pkgs/development/python-modules/neuronpy/default.nix
index b81398f918cda..2d388dfa4c27a 100644
--- a/pkgs/development/python-modules/neuronpy/default.nix
+++ b/pkgs/development/python-modules/neuronpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/nevow/default.nix b/pkgs/development/python-modules/nevow/default.nix
index 356754fdeac8e..b608ae58fc704 100644
--- a/pkgs/development/python-modules/nevow/default.nix
+++ b/pkgs/development/python-modules/nevow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
+{ lib, buildPythonPackage, fetchpatch, fetchPypi, isPy3k, twisted }:
 
 buildPythonPackage rec {
   pname = "Nevow";
diff --git a/pkgs/development/python-modules/nimfa/default.nix b/pkgs/development/python-modules/nimfa/default.nix
index dc889440aa41e..eb04e0c4d89d1 100644
--- a/pkgs/development/python-modules/nimfa/default.nix
+++ b/pkgs/development/python-modules/nimfa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nine/default.nix b/pkgs/development/python-modules/nine/default.nix
index 1747332ed5a25..e2ca5c6f27dd9 100644
--- a/pkgs/development/python-modules/nine/default.nix
+++ b/pkgs/development/python-modules/nine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/nipy/default.nix b/pkgs/development/python-modules/nipy/default.nix
index cb7871aed610e..6229baef32a38 100644
--- a/pkgs/development/python-modules/nipy/default.nix
+++ b/pkgs/development/python-modules/nipy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/nixpkgs/default.nix b/pkgs/development/python-modules/nixpkgs/default.nix
index 4edd31d6a25f6..acebe5d758f7b 100644
--- a/pkgs/development/python-modules/nixpkgs/default.nix
+++ b/pkgs/development/python-modules/nixpkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/node-semver/default.nix b/pkgs/development/python-modules/node-semver/default.nix
index 5ba62fb9210ec..535ff621de5ca 100644
--- a/pkgs/development/python-modules/node-semver/default.nix
+++ b/pkgs/development/python-modules/node-semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/noise/default.nix b/pkgs/development/python-modules/noise/default.nix
index 98f336c49866c..ebd0178602ca3 100644
--- a/pkgs/development/python-modules/noise/default.nix
+++ b/pkgs/development/python-modules/noise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "noise";
diff --git a/pkgs/development/python-modules/nose-cover3/default.nix b/pkgs/development/python-modules/nose-cover3/default.nix
index 185270176acbc..b75dcc526c5fd 100644
--- a/pkgs/development/python-modules/nose-cover3/default.nix
+++ b/pkgs/development/python-modules/nose-cover3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-cprof/default.nix b/pkgs/development/python-modules/nose-cprof/default.nix
index 4f90ee4be8b4e..f4959ec7be78d 100644
--- a/pkgs/development/python-modules/nose-cprof/default.nix
+++ b/pkgs/development/python-modules/nose-cprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nose-focus/default.nix b/pkgs/development/python-modules/nose-focus/default.nix
index 8e31867d85c0b..2805dc4545af1 100644
--- a/pkgs/development/python-modules/nose-focus/default.nix
+++ b/pkgs/development/python-modules/nose-focus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, nose-of-yeti
 , nose-pattern-exclude, which }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/nose-of-yeti/default.nix b/pkgs/development/python-modules/nose-of-yeti/default.nix
index 2bd63f3295d42..16fb264b39aee 100644
--- a/pkgs/development/python-modules/nose-of-yeti/default.nix
+++ b/pkgs/development/python-modules/nose-of-yeti/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
+{ lib, buildPythonPackage, fetchFromGitHub, six, nose, fudge, should-dsl }:
 
 buildPythonPackage rec {
   pname = "nose-of-yeti";
diff --git a/pkgs/development/python-modules/nose-pattern-exclude/default.nix b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
index 05a7102f1ae7f..a550dc5aee156 100644
--- a/pkgs/development/python-modules/nose-pattern-exclude/default.nix
+++ b/pkgs/development/python-modules/nose-pattern-exclude/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "nose-pattern-exclude";
diff --git a/pkgs/development/python-modules/nose/default.nix b/pkgs/development/python-modules/nose/default.nix
index 2805b7c2ea19f..456bbfd9aedd8 100644
--- a/pkgs/development/python-modules/nose/default.nix
+++ b/pkgs/development/python-modules/nose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/nose2/default.nix b/pkgs/development/python-modules/nose2/default.nix
index b815e223d82d1..29ea73619ff10 100644
--- a/pkgs/development/python-modules/nose2/default.nix
+++ b/pkgs/development/python-modules/nose2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/nose_progressive/default.nix b/pkgs/development/python-modules/nose_progressive/default.nix
index b920bb40736c3..bef7058bc3fe4 100644
--- a/pkgs/development/python-modules/nose_progressive/default.nix
+++ b/pkgs/development/python-modules/nose_progressive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosejs/default.nix b/pkgs/development/python-modules/nosejs/default.nix
index c165e87ff2eeb..f80953bd2d712 100644
--- a/pkgs/development/python-modules/nosejs/default.nix
+++ b/pkgs/development/python-modules/nosejs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/nosexcover/default.nix b/pkgs/development/python-modules/nosexcover/default.nix
index 36747a50aae7d..f60ed65448d74 100644
--- a/pkgs/development/python-modules/nosexcover/default.nix
+++ b/pkgs/development/python-modules/nosexcover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , coverage
diff --git a/pkgs/development/python-modules/notmuch/2.nix b/pkgs/development/python-modules/notmuch/2.nix
index 970928e03f400..bde039836ffae 100644
--- a/pkgs/development/python-modules/notmuch/2.nix
+++ b/pkgs/development/python-modules/notmuch/2.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/notmuch/default.nix b/pkgs/development/python-modules/notmuch/default.nix
index 609d4c78d5d76..90695b84c6604 100644
--- a/pkgs/development/python-modules/notmuch/default.nix
+++ b/pkgs/development/python-modules/notmuch/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildPythonPackage
 , notmuch
 , python
diff --git a/pkgs/development/python-modules/ntplib/default.nix b/pkgs/development/python-modules/ntplib/default.nix
index 266482a8ff28b..be8a370f3f3ab 100644
--- a/pkgs/development/python-modules/ntplib/default.nix
+++ b/pkgs/development/python-modules/ntplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/numericalunits/default.nix b/pkgs/development/python-modules/numericalunits/default.nix
index 0c71b065a32d3..8e2f630fdba6f 100644
--- a/pkgs/development/python-modules/numericalunits/default.nix
+++ b/pkgs/development/python-modules/numericalunits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/nvchecker/default.nix b/pkgs/development/python-modules/nvchecker/default.nix
index 832e281a9a1e2..17537be82b496 100644
--- a/pkgs/development/python-modules/nvchecker/default.nix
+++ b/pkgs/development/python-modules/nvchecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/nwdiag/default.nix b/pkgs/development/python-modules/nwdiag/default.nix
index 4676fdef0cdca..c8147d9d9a4e2 100644
--- a/pkgs/development/python-modules/nwdiag/default.nix
+++ b/pkgs/development/python-modules/nwdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, pep8, nose, unittest2, docutils
 , blockdiag, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/nxt-python/default.nix b/pkgs/development/python-modules/nxt-python/default.nix
index 4057ba1de8adb..38920dc55429d 100644
--- a/pkgs/development/python-modules/nxt-python/default.nix
+++ b/pkgs/development/python-modules/nxt-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , isPy3k
diff --git a/pkgs/development/python-modules/oath/default.nix b/pkgs/development/python-modules/oath/default.nix
index 158cf03684065..fd12a830472be 100644
--- a/pkgs/development/python-modules/oath/default.nix
+++ b/pkgs/development/python-modules/oath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth/default.nix b/pkgs/development/python-modules/oauth/default.nix
index 0e53eaec7c0e3..c74de8d6bd6ed 100644
--- a/pkgs/development/python-modules/oauth/default.nix
+++ b/pkgs/development/python-modules/oauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/oauth2/default.nix b/pkgs/development/python-modules/oauth2/default.nix
index 70b2e94e37ca1..d9c0ae505f71c 100644
--- a/pkgs/development/python-modules/oauth2/default.nix
+++ b/pkgs/development/python-modules/oauth2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , httplib2
diff --git a/pkgs/development/python-modules/oauthlib/3.1.nix b/pkgs/development/python-modules/oauthlib/3.1.nix
index 40501733e4c73..10757812037ae 100644
--- a/pkgs/development/python-modules/oauthlib/3.1.nix
+++ b/pkgs/development/python-modules/oauthlib/3.1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/oauthlib/default.nix b/pkgs/development/python-modules/oauthlib/default.nix
index df65547a256d2..5c4cbc78adb7e 100644
--- a/pkgs/development/python-modules/oauthlib/default.nix
+++ b/pkgs/development/python-modules/oauthlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/obfsproxy/default.nix b/pkgs/development/python-modules/obfsproxy/default.nix
index 1dec57cafb44b..b5736851fbb64 100644
--- a/pkgs/development/python-modules/obfsproxy/default.nix
+++ b/pkgs/development/python-modules/obfsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , pyptlib
diff --git a/pkgs/development/python-modules/objgraph/default.nix b/pkgs/development/python-modules/objgraph/default.nix
index 8bb119bcb4bfa..c79b11252be0f 100644
--- a/pkgs/development/python-modules/objgraph/default.nix
+++ b/pkgs/development/python-modules/objgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/offtrac/default.nix b/pkgs/development/python-modules/offtrac/default.nix
index edec161a133b8..1ae555ffa15a9 100644
--- a/pkgs/development/python-modules/offtrac/default.nix
+++ b/pkgs/development/python-modules/offtrac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ofxclient/default.nix b/pkgs/development/python-modules/ofxclient/default.nix
index 5ef7060b7f66d..72e2be7c78bd8 100644
--- a/pkgs/development/python-modules/ofxclient/default.nix
+++ b/pkgs/development/python-modules/ofxclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi,
+{ lib, buildPythonPackage, fetchPypi,
  ofxhome, ofxparse, beautifulsoup4, lxml, keyring
 }:
 
diff --git a/pkgs/development/python-modules/ofxhome/default.nix b/pkgs/development/python-modules/ofxhome/default.nix
index d9a28da180603..72ca65ed17116 100644
--- a/pkgs/development/python-modules/ofxhome/default.nix
+++ b/pkgs/development/python-modules/ofxhome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   version = "0.3.3";
diff --git a/pkgs/development/python-modules/ofxparse/default.nix b/pkgs/development/python-modules/ofxparse/default.nix
index 235875eec7ce2..d018a924d898d 100644
--- a/pkgs/development/python-modules/ofxparse/default.nix
+++ b/pkgs/development/python-modules/ofxparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/ofxtools/default.nix b/pkgs/development/python-modules/ofxtools/default.nix
index 8f280d1cfd45f..a32b0b2329493 100644
--- a/pkgs/development/python-modules/ofxtools/default.nix
+++ b/pkgs/development/python-modules/ofxtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/olefile/default.nix b/pkgs/development/python-modules/olefile/default.nix
index 96c0a0b51bef2..d2c39e54ef48c 100644
--- a/pkgs/development/python-modules/olefile/default.nix
+++ b/pkgs/development/python-modules/olefile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "olefile";
   version = "0.46";
diff --git a/pkgs/development/python-modules/omegaconf/default.nix b/pkgs/development/python-modules/omegaconf/default.nix
index 99b9cccc7de6c..ad9da46243b0b 100644
--- a/pkgs/development/python-modules/omegaconf/default.nix
+++ b/pkgs/development/python-modules/omegaconf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytest, pytestrunner, pyyaml, six, pathlib2, isPy27 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/onkyo-eiscp/default.nix b/pkgs/development/python-modules/onkyo-eiscp/default.nix
index 067db3a69fef6..0877067843230 100644
--- a/pkgs/development/python-modules/onkyo-eiscp/default.nix
+++ b/pkgs/development/python-modules/onkyo-eiscp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docopt, netifaces }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/openant/default.nix b/pkgs/development/python-modules/openant/default.nix
index 374b7cb059d1e..71f699e0552af 100644
--- a/pkgs/development/python-modules/openant/default.nix
+++ b/pkgs/development/python-modules/openant/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyusb
diff --git a/pkgs/development/python-modules/openbabel-bindings/default.nix b/pkgs/development/python-modules/openbabel-bindings/default.nix
index 18a6a8dd032cb..6488b8fad2fb2 100644
--- a/pkgs/development/python-modules/openbabel-bindings/default.nix
+++ b/pkgs/development/python-modules/openbabel-bindings/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openbabel, python, buildPythonPackage }:
+{ lib, openbabel, python, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "openbabel";
diff --git a/pkgs/development/python-modules/openidc-client/default.nix b/pkgs/development/python-modules/openidc-client/default.nix
index 7d373c13a8a59..ce6ccee9793c0 100644
--- a/pkgs/development/python-modules/openidc-client/default.nix
+++ b/pkgs/development/python-modules/openidc-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "openidc-client";
diff --git a/pkgs/development/python-modules/openrazer/common.nix b/pkgs/development/python-modules/openrazer/common.nix
index 843380ebf21d7..2ed723944ddad 100644
--- a/pkgs/development/python-modules/openrazer/common.nix
+++ b/pkgs/development/python-modules/openrazer/common.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 }: rec {
   version = "2.9.0";
diff --git a/pkgs/development/python-modules/openrazer/daemon.nix b/pkgs/development/python-modules/openrazer/daemon.nix
index 6c22d3bae5d08..8b1ff86fcab32 100644
--- a/pkgs/development/python-modules/openrazer/daemon.nix
+++ b/pkgs/development/python-modules/openrazer/daemon.nix
@@ -11,12 +11,11 @@
 , pygobject3
 , pyudev
 , setproctitle
-, stdenv
 , wrapGAppsHook
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonApplication (common // rec {
   pname = "openrazer_daemon";
diff --git a/pkgs/development/python-modules/openrazer/pylib.nix b/pkgs/development/python-modules/openrazer/pylib.nix
index 52fe63318a3e9..fb83d64c5020f 100644
--- a/pkgs/development/python-modules/openrazer/pylib.nix
+++ b/pkgs/development/python-modules/openrazer/pylib.nix
@@ -3,12 +3,11 @@
 , dbus-python
 , fetchFromGitHub
 , numpy
-, stdenv
 , openrazer-daemon
 }:
 
 let
-  common = import ./common.nix { inherit stdenv lib fetchFromGitHub; };
+  common = import ./common.nix { inherit lib fetchFromGitHub; };
 in
 buildPythonPackage (common // rec {
   pname = "openrazer";
diff --git a/pkgs/development/python-modules/ordereddict/default.nix b/pkgs/development/python-modules/ordereddict/default.nix
index e2931840a66a3..6ef006405853c 100644
--- a/pkgs/development/python-modules/ordereddict/default.nix
+++ b/pkgs/development/python-modules/ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/orderedmultidict/default.nix b/pkgs/development/python-modules/orderedmultidict/default.nix
index 1cd0f648bd3e3..7c37cc7aa5aad 100644
--- a/pkgs/development/python-modules/orderedmultidict/default.nix
+++ b/pkgs/development/python-modules/orderedmultidict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
+{ lib, buildPythonPackage, fetchPypi, flake8, six, pythonOlder, importlib-metadata }:
 
 buildPythonPackage rec {
   pname = "orderedmultidict";
diff --git a/pkgs/development/python-modules/orderedset/default.nix b/pkgs/development/python-modules/orderedset/default.nix
index aced6cf08536b..db9c265ef3ef9 100644
--- a/pkgs/development/python-modules/orderedset/default.nix
+++ b/pkgs/development/python-modules/orderedset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "orderedset";
diff --git a/pkgs/development/python-modules/osc/default.nix b/pkgs/development/python-modules/osc/default.nix
index dad78727f2d1a..ac7e401bf6ccd 100644
--- a/pkgs/development/python-modules/osc/default.nix
+++ b/pkgs/development/python-modules/osc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
+{ lib, buildPythonPackage, fetchFromGitHub, bashInteractive, urlgrabber
 , m2crypto, rpm, chardet
 }:
 
diff --git a/pkgs/development/python-modules/osmnx/default.nix b/pkgs/development/python-modules/osmnx/default.nix
index c624e262cf96f..e1c22ddbfa3c0 100755
--- a/pkgs/development/python-modules/osmnx/default.nix
+++ b/pkgs/development/python-modules/osmnx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
+{ lib, buildPythonPackage, fetchFromGitHub, geopandas, descartes, matplotlib, networkx, numpy
 , pandas, requests, Rtree, shapely, pytest, coverage, coveralls, folium, scikitlearn, scipy}:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/packaging/2.nix b/pkgs/development/python-modules/packaging/2.nix
index 5d841eb4fb137..a9b4e159469db 100644
--- a/pkgs/development/python-modules/packaging/2.nix
+++ b/pkgs/development/python-modules/packaging/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/packaging/default.nix b/pkgs/development/python-modules/packaging/default.nix
index 973e516f5a90a..689c2e4516d75 100644
--- a/pkgs/development/python-modules/packaging/default.nix
+++ b/pkgs/development/python-modules/packaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyparsing
diff --git a/pkgs/development/python-modules/pagelabels/default.nix b/pkgs/development/python-modules/pagelabels/default.nix
index 5daa60f475d3b..c17f0ad60dd52 100644
--- a/pkgs/development/python-modules/pagelabels/default.nix
+++ b/pkgs/development/python-modules/pagelabels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pdfrw }:
+{ lib, buildPythonPackage, fetchPypi, pdfrw }:
 
 buildPythonPackage rec {
   pname = "pagelabels";
diff --git a/pkgs/development/python-modules/pagerduty/default.nix b/pkgs/development/python-modules/pagerduty/default.nix
index ebe2c8b5854d5..8390cceb2fcfe 100644
--- a/pkgs/development/python-modules/pagerduty/default.nix
+++ b/pkgs/development/python-modules/pagerduty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/palettable/default.nix b/pkgs/development/python-modules/palettable/default.nix
index d61973aa3bfa8..dce72bb74bb59 100644
--- a/pkgs/development/python-modules/palettable/default.nix
+++ b/pkgs/development/python-modules/palettable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "palettable";
diff --git a/pkgs/development/python-modules/pamqp/default.nix b/pkgs/development/python-modules/pamqp/default.nix
index 2e8e4500f2476..6df8b5491c9af 100644
--- a/pkgs/development/python-modules/pamqp/default.nix
+++ b/pkgs/development/python-modules/pamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pandas-datareader/default.nix b/pkgs/development/python-modules/pandas-datareader/default.nix
index c4bf9c140df3b..ea0ba44e99daa 100644
--- a/pkgs/development/python-modules/pandas-datareader/default.nix
+++ b/pkgs/development/python-modules/pandas-datareader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/pandocfilters/default.nix b/pkgs/development/python-modules/pandocfilters/default.nix
index d31bc2657c934..8ca57440b3f77 100644
--- a/pkgs/development/python-modules/pandocfilters/default.nix
+++ b/pkgs/development/python-modules/pandocfilters/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/paperspace/default.nix b/pkgs/development/python-modules/paperspace/default.nix
index 4553b253819f1..86dbffd76b760 100644
--- a/pkgs/development/python-modules/paperspace/default.nix
+++ b/pkgs/development/python-modules/paperspace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , boto3, requests, gradient_statsd, terminaltables
 , click-completion , click-didyoumean, click-help-colors
 , colorama, requests_toolbelt, gradient_sdk, progressbar2
diff --git a/pkgs/development/python-modules/parameterized/default.nix b/pkgs/development/python-modules/parameterized/default.nix
index 16925bd1286b8..207a6a38bd5af 100644
--- a/pkgs/development/python-modules/parameterized/default.nix
+++ b/pkgs/development/python-modules/parameterized/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
+{ lib, fetchPypi, buildPythonPackage, nose, mock, glibcLocales, isPy3k, isPy38 }:
 
 buildPythonPackage rec {
   pname = "parameterized";
diff --git a/pkgs/development/python-modules/paramz/default.nix b/pkgs/development/python-modules/paramz/default.nix
index 65cc79745caa3..99065aa19944f 100644
--- a/pkgs/development/python-modules/paramz/default.nix
+++ b/pkgs/development/python-modules/paramz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
+{ lib, buildPythonPackage, fetchPypi, numpy, scipy, six, decorator, nose }:
 
 buildPythonPackage rec {
   pname = "paramz";
diff --git a/pkgs/development/python-modules/parse-type/default.nix b/pkgs/development/python-modules/parse-type/default.nix
index d338a351e54ba..decb15ff5e6c3 100644
--- a/pkgs/development/python-modules/parse-type/default.nix
+++ b/pkgs/development/python-modules/parse-type/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, pythonOlder
 , pytest, pytestrunner
 , parse, six, enum34
diff --git a/pkgs/development/python-modules/parse/default.nix b/pkgs/development/python-modules/parse/default.nix
index d72e607bc4108..c5c0c1d7ae6d2 100644
--- a/pkgs/development/python-modules/parse/default.nix
+++ b/pkgs/development/python-modules/parse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi
+{ lib, fetchPypi
 , buildPythonPackage, python
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/parsedatetime/default.nix b/pkgs/development/python-modules/parsedatetime/default.nix
index 1f98940fff065..77196a7c0e99b 100644
--- a/pkgs/development/python-modules/parsedatetime/default.nix
+++ b/pkgs/development/python-modules/parsedatetime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/parsimonious/default.nix b/pkgs/development/python-modules/parsimonious/default.nix
index d41953246db95..557e632f2edad 100644
--- a/pkgs/development/python-modules/parsimonious/default.nix
+++ b/pkgs/development/python-modules/parsimonious/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/paste/default.nix b/pkgs/development/python-modules/paste/default.nix
index a29deed503ed7..533a4dc3a308d 100644
--- a/pkgs/development/python-modules/paste/default.nix
+++ b/pkgs/development/python-modules/paste/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pastedeploy/default.nix b/pkgs/development/python-modules/pastedeploy/default.nix
index 950b232fa7e45..672708b0fd9d8 100644
--- a/pkgs/development/python-modules/pastedeploy/default.nix
+++ b/pkgs/development/python-modules/pastedeploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestrunner
diff --git a/pkgs/development/python-modules/pastescript/default.nix b/pkgs/development/python-modules/pastescript/default.nix
index 57dbb7b9352e1..a526d38339388 100644
--- a/pkgs/development/python-modules/pastescript/default.nix
+++ b/pkgs/development/python-modules/pastescript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/patator/default.nix b/pkgs/development/python-modules/patator/default.nix
index 96ed85d7bcee4..2f0a9b9b62b72 100644
--- a/pkgs/development/python-modules/patator/default.nix
+++ b/pkgs/development/python-modules/patator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy27, fetchPypi
+{ lib, buildPythonPackage, isPy27, fetchPypi
 , paramiko, pycurl, ajpy, impacket, pyopenssl, cx_oracle, mysqlclient
 , psycopg2, pycrypto, dnspython, ipy, pysnmp, pyasn1, pysqlcipher3 }:
 
diff --git a/pkgs/development/python-modules/patch-ng/default.nix b/pkgs/development/python-modules/patch-ng/default.nix
index 981dc067fe7e6..126155722f4f6 100644
--- a/pkgs/development/python-modules/patch-ng/default.nix
+++ b/pkgs/development/python-modules/patch-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patch/default.nix b/pkgs/development/python-modules/patch/default.nix
index 8d7e78c6c27ca..ed11b3a4b52f6 100644
--- a/pkgs/development/python-modules/patch/default.nix
+++ b/pkgs/development/python-modules/patch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchzip
 }:
diff --git a/pkgs/development/python-modules/path-and-address/default.nix b/pkgs/development/python-modules/path-and-address/default.nix
index 9512b0eb0b88a..bd71ffad0f2c6 100644
--- a/pkgs/development/python-modules/path-and-address/default.nix
+++ b/pkgs/development/python-modules/path-and-address/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pathos/default.nix b/pkgs/development/python-modules/pathos/default.nix
index 7780709060225..fd6bd238d1e09 100644
--- a/pkgs/development/python-modules/pathos/default.nix
+++ b/pkgs/development/python-modules/pathos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , dill
diff --git a/pkgs/development/python-modules/pathtools/default.nix b/pkgs/development/python-modules/pathtools/default.nix
index 57fff82a81d77..86c2aeb88dc06 100644
--- a/pkgs/development/python-modules/pathtools/default.nix
+++ b/pkgs/development/python-modules/pathtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/patool/default.nix b/pkgs/development/python-modules/patool/default.nix
index 1420597a1f329..2fa07d32ccb1d 100644
--- a/pkgs/development/python-modules/patool/default.nix
+++ b/pkgs/development/python-modules/patool/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, p7zip,
   unzip, cabextract, zip, zopfli, lzip, zpaq, gnutar, gnugrep, diffutils, file,
   gzip, bzip2, xz}:
 
diff --git a/pkgs/development/python-modules/paver/default.nix b/pkgs/development/python-modules/paver/default.nix
index 5d01df22b6d5a..8721ef3dd6015 100644
--- a/pkgs/development/python-modules/paver/default.nix
+++ b/pkgs/development/python-modules/paver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pbkdf2/default.nix b/pkgs/development/python-modules/pbkdf2/default.nix
index 18a2b9b95a3a1..8f489ca24b9c2 100644
--- a/pkgs/development/python-modules/pbkdf2/default.nix
+++ b/pkgs/development/python-modules/pbkdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pbkdf2";
diff --git a/pkgs/development/python-modules/pc-ble-driver-py/default.nix b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
index 6a12eea1b00c6..bd6432db534f1 100644
--- a/pkgs/development/python-modules/pc-ble-driver-py/default.nix
+++ b/pkgs/development/python-modules/pc-ble-driver-py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
+{ lib, fetchFromGitHub, cmake, git, swig, boost, udev, pc-ble-driver, pythonOlder
 , buildPythonPackage, enum34, wrapt, future, setuptools, scikit-build, pythonAtLeast }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pcpp/default.nix b/pkgs/development/python-modules/pcpp/default.nix
index aea7ff0fcdaf2..704e979c2caac 100644
--- a/pkgs/development/python-modules/pcpp/default.nix
+++ b/pkgs/development/python-modules/pcpp/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pdf2image/default.nix b/pkgs/development/python-modules/pdf2image/default.nix
index adc43ef4c2edc..4eddc028a251e 100644
--- a/pkgs/development/python-modules/pdf2image/default.nix
+++ b/pkgs/development/python-modules/pdf2image/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
+{ lib, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
 
 buildPythonPackage rec {
   pname = "pdf2image";
diff --git a/pkgs/development/python-modules/pdfkit/default.nix b/pkgs/development/python-modules/pdfkit/default.nix
index 10bc09e8ca92b..431f7f09796bb 100644
--- a/pkgs/development/python-modules/pdfkit/default.nix
+++ b/pkgs/development/python-modules/pdfkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pdfminer_six/default.nix b/pkgs/development/python-modules/pdfminer_six/default.nix
index 9a659eebe3301..96ba66869055d 100644
--- a/pkgs/development/python-modules/pdfminer_six/default.nix
+++ b/pkgs/development/python-modules/pdfminer_six/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, cryptography, chardet, nose, sortedcontainers }:
 
 buildPythonPackage rec {
   pname = "pdfminer_six";
diff --git a/pkgs/development/python-modules/pdfposter/default.nix b/pkgs/development/python-modules/pdfposter/default.nix
index 0a21ed1e4999b..00cfea5cc9b00 100644
--- a/pkgs/development/python-modules/pdfposter/default.nix
+++ b/pkgs/development/python-modules/pdfposter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pypdf2 }:
+{ lib, buildPythonPackage, fetchPypi, pypdf2 }:
 
 buildPythonPackage rec {
   pname = "pdftools.pdfposter";
diff --git a/pkgs/development/python-modules/pdfrw/default.nix b/pkgs/development/python-modules/pdfrw/default.nix
index 49abb3751c910..5cc619ef6a47d 100644
--- a/pkgs/development/python-modules/pdfrw/default.nix
+++ b/pkgs/development/python-modules/pdfrw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pdfrw";
diff --git a/pkgs/development/python-modules/pdfx/default.nix b/pkgs/development/python-modules/pdfx/default.nix
index 97dee7e75705d..a8c110fdba70a 100644
--- a/pkgs/development/python-modules/pdfx/default.nix
+++ b/pkgs/development/python-modules/pdfx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pdfminer, chardet, pytest }:
 
 buildPythonPackage rec {
   pname = "pdfx";
diff --git a/pkgs/development/python-modules/pecan/default.nix b/pkgs/development/python-modules/pecan/default.nix
index ed0c89b7802b1..a66c4077c3c9a 100644
--- a/pkgs/development/python-modules/pecan/default.nix
+++ b/pkgs/development/python-modules/pecan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , isPy27
diff --git a/pkgs/development/python-modules/pelican/default.nix b/pkgs/development/python-modules/pelican/default.nix
index 0b103b780c085..71bec7e42df0e 100644
--- a/pkgs/development/python-modules/pelican/default.nix
+++ b/pkgs/development/python-modules/pelican/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , glibcLocales, git
 , mock, nose, markdown, lxml, typogrify
 , jinja2, pygments, docutils, pytz, unidecode, six, dateutil, feedgenerator
diff --git a/pkgs/development/python-modules/pep257/default.nix b/pkgs/development/python-modules/pep257/default.nix
index 296b55eec125f..e9cba70e63179 100644
--- a/pkgs/development/python-modules/pep257/default.nix
+++ b/pkgs/development/python-modules/pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, pytest, mock }:
+{ lib, buildPythonPackage, fetchurl, pytest, mock }:
 buildPythonPackage rec {
   pname = "pep257";
   version = "0.7.0";
diff --git a/pkgs/development/python-modules/pep8/default.nix b/pkgs/development/python-modules/pep8/default.nix
index 8ef3bfea0f5df..cc0e546b957c8 100644
--- a/pkgs/development/python-modules/pep8/default.nix
+++ b/pkgs/development/python-modules/pep8/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/peppercorn/default.nix b/pkgs/development/python-modules/peppercorn/default.nix
index 6caf61b0cd0d8..310cc565b21fc 100644
--- a/pkgs/development/python-modules/peppercorn/default.nix
+++ b/pkgs/development/python-modules/peppercorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/persisting-theory/default.nix b/pkgs/development/python-modules/persisting-theory/default.nix
index 86bae927d9ff7..6859b6264a8f6 100644
--- a/pkgs/development/python-modules/persisting-theory/default.nix
+++ b/pkgs/development/python-modules/persisting-theory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose
 }:
 
diff --git a/pkgs/development/python-modules/pex/default.nix b/pkgs/development/python-modules/pex/default.nix
index 1d7de0088a844..e65f62c8ff7b2 100644
--- a/pkgs/development/python-modules/pex/default.nix
+++ b/pkgs/development/python-modules/pex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pexif/default.nix b/pkgs/development/python-modules/pexif/default.nix
index 326dde176ae61..a31d80eed0521 100644
--- a/pkgs/development/python-modules/pexif/default.nix
+++ b/pkgs/development/python-modules/pexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pg8000/1_12.nix b/pkgs/development/python-modules/pg8000/1_12.nix
index d84bb2014b804..e53817b3911bd 100644
--- a/pkgs/development/python-modules/pg8000/1_12.nix
+++ b/pkgs/development/python-modules/pg8000/1_12.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pg8000/default.nix b/pkgs/development/python-modules/pg8000/default.nix
index 8f63e00e7997f..9f9bb1702a90c 100644
--- a/pkgs/development/python-modules/pg8000/default.nix
+++ b/pkgs/development/python-modules/pg8000/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , scramp
diff --git a/pkgs/development/python-modules/pgpdump/default.nix b/pkgs/development/python-modules/pgpdump/default.nix
index d795cc3678f73..e952ced742c6e 100644
--- a/pkgs/development/python-modules/pgpdump/default.nix
+++ b/pkgs/development/python-modules/pgpdump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pgspecial/default.nix b/pkgs/development/python-modules/pgspecial/default.nix
index 796a38198814b..476921da632fa 100644
--- a/pkgs/development/python-modules/pgspecial/default.nix
+++ b/pkgs/development/python-modules/pgspecial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
+{ lib, buildPythonPackage, fetchPypi, pytest, psycopg2, click, sqlparse }:
 
 buildPythonPackage rec {
   pname = "pgspecial";
diff --git a/pkgs/development/python-modules/phe/default.nix b/pkgs/development/python-modules/phe/default.nix
index 5a00a4ccb099c..86a5ec848ace9 100644
--- a/pkgs/development/python-modules/phe/default.nix
+++ b/pkgs/development/python-modules/phe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
+{ lib, buildPythonPackage, fetchPypi, isPyPy, isPy3k, click, gmpy2, numpy } :
 
 let
   pname = "phe";
diff --git a/pkgs/development/python-modules/phonopy/default.nix b/pkgs/development/python-modules/phonopy/default.nix
index 03e0c54caab76..2259fcd7ba524 100644
--- a/pkgs/development/python-modules/phonopy/default.nix
+++ b/pkgs/development/python-modules/phonopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
+{ lib, buildPythonPackage, python, fetchPypi, numpy, pyyaml, matplotlib, h5py, spglib, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phonopy";
diff --git a/pkgs/development/python-modules/phx-class-registry/default.nix b/pkgs/development/python-modules/phx-class-registry/default.nix
index 9ed84e86371ce..94538dc6e74dc 100644
--- a/pkgs/development/python-modules/phx-class-registry/default.nix
+++ b/pkgs/development/python-modules/phx-class-registry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "phx-class-registry";
diff --git a/pkgs/development/python-modules/pickleshare/default.nix b/pkgs/development/python-modules/pickleshare/default.nix
index 2151e13b960db..34798cc3ee5e4 100644
--- a/pkgs/development/python-modules/pickleshare/default.nix
+++ b/pkgs/development/python-modules/pickleshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pathpy
diff --git a/pkgs/development/python-modules/pid/default.nix b/pkgs/development/python-modules/pid/default.nix
index 95aca29da5d10..f4ce57b3a20d1 100644
--- a/pkgs/development/python-modules/pid/default.nix
+++ b/pkgs/development/python-modules/pid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/piep/default.nix b/pkgs/development/python-modules/piep/default.nix
index c4fd24d070e62..aacd9e314cb3b 100644
--- a/pkgs/development/python-modules/piep/default.nix
+++ b/pkgs/development/python-modules/piep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pika-pool/default.nix b/pkgs/development/python-modules/pika-pool/default.nix
index a36fcdf18bb58..051fdef8fe7d3 100644
--- a/pkgs/development/python-modules/pika-pool/default.nix
+++ b/pkgs/development/python-modules/pika-pool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pika
 }:
 
diff --git a/pkgs/development/python-modules/pika/default.nix b/pkgs/development/python-modules/pika/default.nix
index ec8310bdb55f7..c1bfe5297d71f 100644
--- a/pkgs/development/python-modules/pika/default.nix
+++ b/pkgs/development/python-modules/pika/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/pikepdf/default.nix b/pkgs/development/python-modules/pikepdf/default.nix
index ff2a2ce4c5e7a..38efe0a49b0a7 100644
--- a/pkgs/development/python-modules/pikepdf/default.nix
+++ b/pkgs/development/python-modules/pikepdf/default.nix
@@ -18,7 +18,7 @@
 , qpdf
 , setuptools-scm-git-archive
 , setuptools_scm
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pilkit/default.nix b/pkgs/development/python-modules/pilkit/default.nix
index 4a3c682c1229a..bc21d6bf465ed 100644
--- a/pkgs/development/python-modules/pilkit/default.nix
+++ b/pkgs/development/python-modules/pilkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pillowfight/default.nix b/pkgs/development/python-modules/pillowfight/default.nix
index 9e23f69d19c5d..c022fdb988d53 100644
--- a/pkgs/development/python-modules/pillowfight/default.nix
+++ b/pkgs/development/python-modules/pillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pims/default.nix b/pkgs/development/python-modules/pims/default.nix
index d2a5641acff5e..bfe4e2b9ea03c 100644
--- a/pkgs/development/python-modules/pims/default.nix
+++ b/pkgs/development/python-modules/pims/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , slicerator
diff --git a/pkgs/development/python-modules/pivy/default.nix b/pkgs/development/python-modules/pivy/default.nix
index aae90d2f8b496..312c87ae54443 100644
--- a/pkgs/development/python-modules/pivy/default.nix
+++ b/pkgs/development/python-modules/pivy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
+{ lib, buildPythonPackage, fetchFromGitHub, pkgs, qtbase, qmake, soqt }:
 
 buildPythonPackage rec {
   pname = "pivy";
diff --git a/pkgs/development/python-modules/pkginfo/default.nix b/pkgs/development/python-modules/pkginfo/default.nix
index dbf487c5d3aa0..5216ab17879d5 100644
--- a/pkgs/development/python-modules/pkginfo/default.nix
+++ b/pkgs/development/python-modules/pkginfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pkginfo";
diff --git a/pkgs/development/python-modules/pkuseg/default.nix b/pkgs/development/python-modules/pkuseg/default.nix
index 8e3e301793aae..1944ac5197c35 100644
--- a/pkgs/development/python-modules/pkuseg/default.nix
+++ b/pkgs/development/python-modules/pkuseg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/plac/default.nix b/pkgs/development/python-modules/plac/default.nix
index 9e2c66d9d1edf..9261133bc9251 100644
--- a/pkgs/development/python-modules/plac/default.nix
+++ b/pkgs/development/python-modules/plac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pluginbase/default.nix b/pkgs/development/python-modules/pluginbase/default.nix
index 956ea1b720aef..697717eeca613 100644
--- a/pkgs/development/python-modules/pluginbase/default.nix
+++ b/pkgs/development/python-modules/pluginbase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pytest }:
+{ lib, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   version = "1.0.0";
diff --git a/pkgs/development/python-modules/plyvel/default.nix b/pkgs/development/python-modules/plyvel/default.nix
index d8537d68158a9..aa247c8e4261c 100644
--- a/pkgs/development/python-modules/plyvel/default.nix
+++ b/pkgs/development/python-modules/plyvel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/pocket/default.nix b/pkgs/development/python-modules/pocket/default.nix
index 3599d3dec55d6..e5a2d464bde8f 100644
--- a/pkgs/development/python-modules/pocket/default.nix
+++ b/pkgs/development/python-modules/pocket/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/polib/default.nix b/pkgs/development/python-modules/polib/default.nix
index f7c4e1139a867..00353ac0cca29 100644
--- a/pkgs/development/python-modules/polib/default.nix
+++ b/pkgs/development/python-modules/polib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "polib";
diff --git a/pkgs/development/python-modules/pomegranate/default.nix b/pkgs/development/python-modules/pomegranate/default.nix
index 7595730eb31b7..8f260ad8ccb9c 100644
--- a/pkgs/development/python-modules/pomegranate/default.nix
+++ b/pkgs/development/python-modules/pomegranate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, cython, networkx, joblib, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "pomegranate";
diff --git a/pkgs/development/python-modules/pony/default.nix b/pkgs/development/python-modules/pony/default.nix
index 7a734927ee1e0..03330c4cfec76 100644
--- a/pkgs/development/python-modules/pony/default.nix
+++ b/pkgs/development/python-modules/pony/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, fetchPypi }:
+{ lib, python, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pony";
diff --git a/pkgs/development/python-modules/pooch/default.nix b/pkgs/development/python-modules/pooch/default.nix
index 282239d9890bd..de0ba145828cb 100644
--- a/pkgs/development/python-modules/pooch/default.nix
+++ b/pkgs/development/python-modules/pooch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy27
 , fetchPypi
diff --git a/pkgs/development/python-modules/poppler-qt5/default.nix b/pkgs/development/python-modules/poppler-qt5/default.nix
index 4aaaea406774b..e94a234dc1a36 100644
--- a/pkgs/development/python-modules/poppler-qt5/default.nix
+++ b/pkgs/development/python-modules/poppler-qt5/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
+{ buildPythonPackage, fetchPypi, lib, sip, qtbase, pyqt5, poppler, pkg-config, fetchpatch
 , substituteAll
 }:
 
diff --git a/pkgs/development/python-modules/portend/default.nix b/pkgs/development/python-modules/portend/default.nix
index 10b30d05fa3ea..1408f7ca905f8 100644
--- a/pkgs/development/python-modules/portend/default.nix
+++ b/pkgs/development/python-modules/portend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm, tempora, pytest-black, pytestcov }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/posix_ipc/default.nix b/pkgs/development/python-modules/posix_ipc/default.nix
index 2fb6128dc1b12..59f4b4b707f27 100644
--- a/pkgs/development/python-modules/posix_ipc/default.nix
+++ b/pkgs/development/python-modules/posix_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/potr/default.nix b/pkgs/development/python-modules/potr/default.nix
index 9f2774b9a6077..671010bb9009a 100644
--- a/pkgs/development/python-modules/potr/default.nix
+++ b/pkgs/development/python-modules/potr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pycrypto }:
+{ lib, fetchPypi, buildPythonPackage, pycrypto }:
 
 buildPythonPackage rec {
   pname = "python-potr";
diff --git a/pkgs/development/python-modules/power/default.nix b/pkgs/development/python-modules/power/default.nix
index d1998faf6b640..8f72553092ec8 100644
--- a/pkgs/development/python-modules/power/default.nix
+++ b/pkgs/development/python-modules/power/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pox/default.nix b/pkgs/development/python-modules/pox/default.nix
index e7013154f9988..24591824e07d1 100644
--- a/pkgs/development/python-modules/pox/default.nix
+++ b/pkgs/development/python-modules/pox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/poyo/default.nix b/pkgs/development/python-modules/poyo/default.nix
index d600e46c6b420..b7963258f3381 100644
--- a/pkgs/development/python-modules/poyo/default.nix
+++ b/pkgs/development/python-modules/poyo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ppscore/default.nix b/pkgs/development/python-modules/ppscore/default.nix
index 00542c6e90e1d..ad3a393a00d12 100644
--- a/pkgs/development/python-modules/ppscore/default.nix
+++ b/pkgs/development/python-modules/ppscore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/praw/6.3.nix b/pkgs/development/python-modules/praw/6.3.nix
index 00182eda03791..3fc485c00ec29 100644
--- a/pkgs/development/python-modules/praw/6.3.nix
+++ b/pkgs/development/python-modules/praw/6.3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/praw/default.nix b/pkgs/development/python-modules/praw/default.nix
index 61b869e87fb21..a4c048e9c9bf4 100644
--- a/pkgs/development/python-modules/praw/default.nix
+++ b/pkgs/development/python-modules/praw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , betamax
 , betamax-serializers
 , betamax-matchers
diff --git a/pkgs/development/python-modules/prawcore/default.nix b/pkgs/development/python-modules/prawcore/default.nix
index 533c31d87ce22..2b6eff885f9e5 100644
--- a/pkgs/development/python-modules/prawcore/default.nix
+++ b/pkgs/development/python-modules/prawcore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests
 , testfixtures, mock, requests_toolbelt
 , betamax, betamax-serializers, betamax-matchers, pytest
diff --git a/pkgs/development/python-modules/preggy/default.nix b/pkgs/development/python-modules/preggy/default.nix
index a2144f303be72..44be123335f9d 100644
--- a/pkgs/development/python-modules/preggy/default.nix
+++ b/pkgs/development/python-modules/preggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
+{ lib, buildPythonPackage, fetchPypi, six, unidecode, nose, yanc }:
 
 buildPythonPackage rec {
   pname = "preggy";
diff --git a/pkgs/development/python-modules/preshed/default.nix b/pkgs/development/python-modules/preshed/default.nix
index 5d75c95d770bb..767d5b867f0e4 100644
--- a/pkgs/development/python-modules/preshed/default.nix
+++ b/pkgs/development/python-modules/preshed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , murmurhash
diff --git a/pkgs/development/python-modules/pretend/default.nix b/pkgs/development/python-modules/pretend/default.nix
index 4fe726591e60c..87e0e6613b1dd 100644
--- a/pkgs/development/python-modules/pretend/default.nix
+++ b/pkgs/development/python-modules/pretend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pretend";
diff --git a/pkgs/development/python-modules/prettytable/1.nix b/pkgs/development/python-modules/prettytable/1.nix
index 5b7457af9bf7c..0bd18f0721fc6 100644
--- a/pkgs/development/python-modules/prettytable/1.nix
+++ b/pkgs/development/python-modules/prettytable/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/prettytable/default.nix b/pkgs/development/python-modules/prettytable/default.nix
index 5a15cfd24eb00..5463403dec7b7 100644
--- a/pkgs/development/python-modules/prettytable/default.nix
+++ b/pkgs/development/python-modules/prettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/proboscis/default.nix b/pkgs/development/python-modules/proboscis/default.nix
index 00905136716f4..a2a1d04ebe0ed 100644
--- a/pkgs/development/python-modules/proboscis/default.nix
+++ b/pkgs/development/python-modules/proboscis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "proboscis";
diff --git a/pkgs/development/python-modules/process-tests/default.nix b/pkgs/development/python-modules/process-tests/default.nix
index 4b83205d723e3..abf175b55312b 100644
--- a/pkgs/development/python-modules/process-tests/default.nix
+++ b/pkgs/development/python-modules/process-tests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/proglog/default.nix b/pkgs/development/python-modules/proglog/default.nix
index 3f8c110438114..9839ea9dd2338 100644
--- a/pkgs/development/python-modules/proglog/default.nix
+++ b/pkgs/development/python-modules/proglog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tqdm }:
+{ lib, fetchPypi, buildPythonPackage, tqdm }:
 
 buildPythonPackage rec {
   pname = "proglog";
diff --git a/pkgs/development/python-modules/progress/default.nix b/pkgs/development/python-modules/progress/default.nix
index 2c5dbc1386e85..fcc1a7a922937 100644
--- a/pkgs/development/python-modules/progress/default.nix
+++ b/pkgs/development/python-modules/progress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index a1fdddd95db80..68967ecf6533a 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar";
diff --git a/pkgs/development/python-modules/progressbar2/default.nix b/pkgs/development/python-modules/progressbar2/default.nix
index cc3029ade64e4..b5c488c0838c1 100644
--- a/pkgs/development/python-modules/progressbar2/default.nix
+++ b/pkgs/development/python-modules/progressbar2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python
 , buildPythonPackage
 , fetchPypi
diff --git a/pkgs/development/python-modules/progressbar231/default.nix b/pkgs/development/python-modules/progressbar231/default.nix
index f8980647482cd..d421efde8aa10 100644
--- a/pkgs/development/python-modules/progressbar231/default.nix
+++ b/pkgs/development/python-modules/progressbar231/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "progressbar231";
diff --git a/pkgs/development/python-modules/progressbar33/default.nix b/pkgs/development/python-modules/progressbar33/default.nix
index 0b53b83f5cca9..a483a6001f000 100644
--- a/pkgs/development/python-modules/progressbar33/default.nix
+++ b/pkgs/development/python-modules/progressbar33/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar33";
diff --git a/pkgs/development/python-modules/proto-plus/default.nix b/pkgs/development/python-modules/proto-plus/default.nix
index 1cd732b19aea1..cc9444098defc 100644
--- a/pkgs/development/python-modules/proto-plus/default.nix
+++ b/pkgs/development/python-modules/proto-plus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/prov/default.nix b/pkgs/development/python-modules/prov/default.nix
index 9ab4cbf72bdfa..acee0f09b8483 100644
--- a/pkgs/development/python-modules/prov/default.nix
+++ b/pkgs/development/python-modules/prov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , lxml
diff --git a/pkgs/development/python-modules/ptable/default.nix b/pkgs/development/python-modules/ptable/default.nix
index ffa9bdacd2d13..ae2ad58a1acb1 100644
--- a/pkgs/development/python-modules/ptable/default.nix
+++ b/pkgs/development/python-modules/ptable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage {
   pname = "ptable";
diff --git a/pkgs/development/python-modules/ptest/default.nix b/pkgs/development/python-modules/ptest/default.nix
index c19780a4411c9..2a4180a4cbeda 100644
--- a/pkgs/development/python-modules/ptest/default.nix
+++ b/pkgs/development/python-modules/ptest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/ptpython/default.nix b/pkgs/development/python-modules/ptpython/default.nix
index fd7b92692fc60..2758c3a582ff9 100644
--- a/pkgs/development/python-modules/ptpython/default.nix
+++ b/pkgs/development/python-modules/ptpython/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, prompt_toolkit, appdirs, docopt, jedi
 , pygments, importlib-metadata, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/publicsuffix/default.nix b/pkgs/development/python-modules/publicsuffix/default.nix
index abac4fb3baa07..997bc31c86568 100644
--- a/pkgs/development/python-modules/publicsuffix/default.nix
+++ b/pkgs/development/python-modules/publicsuffix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "publicsuffix";
diff --git a/pkgs/development/python-modules/publicsuffix2/default.nix b/pkgs/development/python-modules/publicsuffix2/default.nix
index 2d9bc73baa3fb..30a02ec2f0ddd 100644
--- a/pkgs/development/python-modules/publicsuffix2/default.nix
+++ b/pkgs/development/python-modules/publicsuffix2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, requests }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests }:
 
 buildPythonPackage rec {
   pname = "publicsuffix2";
diff --git a/pkgs/development/python-modules/pudb/default.nix b/pkgs/development/python-modules/pudb/default.nix
index 0ee2a8470b5ec..db48fbf1e4809 100644
--- a/pkgs/development/python-modules/pudb/default.nix
+++ b/pkgs/development/python-modules/pudb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pure-pcapy3/default.nix b/pkgs/development/python-modules/pure-pcapy3/default.nix
index 9679cc593df0d..636cbaff71cce 100644
--- a/pkgs/development/python-modules/pure-pcapy3/default.nix
+++ b/pkgs/development/python-modules/pure-pcapy3/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pure-pcapy3";
diff --git a/pkgs/development/python-modules/purepng/default.nix b/pkgs/development/python-modules/purepng/default.nix
index 715b2ca690292..3615935b88ec2 100644
--- a/pkgs/development/python-modules/purepng/default.nix
+++ b/pkgs/development/python-modules/purepng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , python
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pushover/default.nix b/pkgs/development/python-modules/pushover/default.nix
index 1093f125a9695..1ef14af135f26 100644
--- a/pkgs/development/python-modules/pushover/default.nix
+++ b/pkgs/development/python-modules/pushover/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pvlib/default.nix b/pkgs/development/python-modules/pvlib/default.nix
index 006246e583662..3a93b36cb2b72 100644
--- a/pkgs/development/python-modules/pvlib/default.nix
+++ b/pkgs/development/python-modules/pvlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, numpy, pandas, pytz, six
 , pytestCheckHook, flaky, mock, pytest-mock, requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pweave/default.nix b/pkgs/development/python-modules/pweave/default.nix
index fe74fcece1c08..1b8e1a3cc6f1e 100644
--- a/pkgs/development/python-modules/pweave/default.nix
+++ b/pkgs/development/python-modules/pweave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pwntools/default.nix b/pkgs/development/python-modules/pwntools/default.nix
index 77f7859c6d47d..a24e1d5db13eb 100644
--- a/pkgs/development/python-modules/pwntools/default.nix
+++ b/pkgs/development/python-modules/pwntools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , debugger
 , fetchPypi
diff --git a/pkgs/development/python-modules/pxml/default.nix b/pkgs/development/python-modules/pxml/default.nix
index 57614089e66e2..21dc2f4abc4d1 100644
--- a/pkgs/development/python-modules/pxml/default.nix
+++ b/pkgs/development/python-modules/pxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pythonAtLeast
 , isPy27
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/py-radix/default.nix b/pkgs/development/python-modules/py-radix/default.nix
index fa057ae992546..18fff5ec97f61 100644
--- a/pkgs/development/python-modules/py-radix/default.nix
+++ b/pkgs/development/python-modules/py-radix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , coverage
diff --git a/pkgs/development/python-modules/py/default.nix b/pkgs/development/python-modules/py/default.nix
index 4d2b77bb1f2a0..aa12deabb37ef 100644
--- a/pkgs/development/python-modules/py/default.nix
+++ b/pkgs/development/python-modules/py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "py";
diff --git a/pkgs/development/python-modules/py3dns/default.nix b/pkgs/development/python-modules/py3dns/default.nix
index 1f7aeaf1e1182..12297b9a6f78b 100644
--- a/pkgs/development/python-modules/py3dns/default.nix
+++ b/pkgs/development/python-modules/py3dns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/py3status/default.nix b/pkgs/development/python-modules/py3status/default.nix
index 71314a08eebc1..bd0f179dc8509 100644
--- a/pkgs/development/python-modules/py3status/default.nix
+++ b/pkgs/development/python-modules/py3status/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/py4j/default.nix b/pkgs/development/python-modules/py4j/default.nix
index 588d7a32d22f4..8eb1649fcc5ee 100644
--- a/pkgs/development/python-modules/py4j/default.nix
+++ b/pkgs/development/python-modules/py4j/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "py4j";
diff --git a/pkgs/development/python-modules/pyGithub/default.nix b/pkgs/development/python-modules/pyGithub/default.nix
index f53cc45b9fe7e..c214b375ff382 100644
--- a/pkgs/development/python-modules/pyGithub/default.nix
+++ b/pkgs/development/python-modules/pyGithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , cryptography
 , deprecated
diff --git a/pkgs/development/python-modules/py_scrypt/default.nix b/pkgs/development/python-modules/py_scrypt/default.nix
index af86ce3821eb1..b5ae4193f18c6 100644
--- a/pkgs/development/python-modules/py_scrypt/default.nix
+++ b/pkgs/development/python-modules/py_scrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , openssl
diff --git a/pkgs/development/python-modules/pyacoustid/default.nix b/pkgs/development/python-modules/pyacoustid/default.nix
index d424b2144292d..5bebb1d5bc7ef 100644
--- a/pkgs/development/python-modules/pyacoustid/default.nix
+++ b/pkgs/development/python-modules/pyacoustid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/pyalgotrade/default.nix b/pkgs/development/python-modules/pyalgotrade/default.nix
index 075103e9e40fa..680a8f6f8307a 100644
--- a/pkgs/development/python-modules/pyalgotrade/default.nix
+++ b/pkgs/development/python-modules/pyalgotrade/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , matplotlib
diff --git a/pkgs/development/python-modules/pyamf/default.nix b/pkgs/development/python-modules/pyamf/default.nix
index f0cf111a87ade..cebb1cc3f0ba9 100644
--- a/pkgs/development/python-modules/pyamf/default.nix
+++ b/pkgs/development/python-modules/pyamf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, defusedxml }:
 
 buildPythonPackage rec {
   pname = "PyAMF";
diff --git a/pkgs/development/python-modules/pyannotate/default.nix b/pkgs/development/python-modules/pyannotate/default.nix
index 9c9c18a886e9f..332a4161fe787 100644
--- a/pkgs/development/python-modules/pyannotate/default.nix
+++ b/pkgs/development/python-modules/pyannotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pyasn1-modules/default.nix b/pkgs/development/python-modules/pyasn1-modules/default.nix
index 2be2e8b9c11a2..4bb515e17aa6a 100644
--- a/pkgs/development/python-modules/pyasn1-modules/default.nix
+++ b/pkgs/development/python-modules/pyasn1-modules/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pyasn1/default.nix b/pkgs/development/python-modules/pyasn1/default.nix
index 9b269f79c86a1..a0037d6468353 100644
--- a/pkgs/development/python-modules/pyasn1/default.nix
+++ b/pkgs/development/python-modules/pyasn1/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, }:
+{ lib, buildPythonPackage, fetchPypi, }:
 
 buildPythonPackage rec {
   pname = "pyasn1";
diff --git a/pkgs/development/python-modules/pyatv/default.nix b/pkgs/development/python-modules/pyatv/default.nix
index 187f94dbd778e..9e4f872e6f2e2 100644
--- a/pkgs/development/python-modules/pyatv/default.nix
+++ b/pkgs/development/python-modules/pyatv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , aiohttp
 , aiozeroconf
 , asynctest
diff --git a/pkgs/development/python-modules/pyaudio/default.nix b/pkgs/development/python-modules/pyaudio/default.nix
index d88dc7009b739..e937b8759f69d 100644
--- a/pkgs/development/python-modules/pyaudio/default.nix
+++ b/pkgs/development/python-modules/pyaudio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyaxmlparser/default.nix b/pkgs/development/python-modules/pyaxmlparser/default.nix
index 63e180b11b2ba..e77c6dda8402d 100644
--- a/pkgs/development/python-modules/pyaxmlparser/default.nix
+++ b/pkgs/development/python-modules/pyaxmlparser/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, lxml, click, fetchFromGitHub, pytest, isPy3k }:
+{ buildPythonPackage, lib, lxml, click, fetchFromGitHub, pytest, isPy3k }:
 
 buildPythonPackage rec {
   version = "0.3.24";
diff --git a/pkgs/development/python-modules/pybase64/default.nix b/pkgs/development/python-modules/pybase64/default.nix
index e462d53fea885..aa65d7ccadfe2 100644
--- a/pkgs/development/python-modules/pybase64/default.nix
+++ b/pkgs/development/python-modules/pybase64/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, isPy3k, lib, stdenv, fetchPypi, six, pytest }:
+{ buildPythonPackage, isPy3k, lib, fetchPypi, six, pytest }:
 
 buildPythonPackage rec {
   pname = "pybase64";
diff --git a/pkgs/development/python-modules/pybindgen/default.nix b/pkgs/development/python-modules/pybindgen/default.nix
index 4b6f7f1682ff3..9e8174f9b7f71 100644
--- a/pkgs/development/python-modules/pybindgen/default.nix
+++ b/pkgs/development/python-modules/pybindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k, setuptools_scm, pygccxml }:
 buildPythonPackage rec {
   pname = "PyBindGen";
   version = "0.21.0";
diff --git a/pkgs/development/python-modules/pyblosxom/default.nix b/pkgs/development/python-modules/pyblosxom/default.nix
index dee6aea559a59..77e47eb983642 100644
--- a/pkgs/development/python-modules/pyblosxom/default.nix
+++ b/pkgs/development/python-modules/pyblosxom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pygments
diff --git a/pkgs/development/python-modules/pybluez/default.nix b/pkgs/development/python-modules/pybluez/default.nix
index a02861c68cda8..1cd7d91ef2593 100644
--- a/pkgs/development/python-modules/pybluez/default.nix
+++ b/pkgs/development/python-modules/pybluez/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pkgs
diff --git a/pkgs/development/python-modules/pybrowserid/default.nix b/pkgs/development/python-modules/pybrowserid/default.nix
index eacbd81055c50..7517de597544f 100644
--- a/pkgs/development/python-modules/pybrowserid/default.nix
+++ b/pkgs/development/python-modules/pybrowserid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycallgraph/default.nix b/pkgs/development/python-modules/pycallgraph/default.nix
index 1353af406ca4f..af9f18aad2c61 100644
--- a/pkgs/development/python-modules/pycallgraph/default.nix
+++ b/pkgs/development/python-modules/pycallgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pycangjie/default.nix b/pkgs/development/python-modules/pycangjie/default.nix
index 6fc9d2af1cbc4..1f7ccde2576b9 100644
--- a/pkgs/development/python-modules/pycangjie/default.nix
+++ b/pkgs/development/python-modules/pycangjie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
+{ lib, fetchurl, bash, autoconf, automake, libtool, pkg-config, libcangjie
 , sqlite, buildPythonPackage, cython
 }:
 
diff --git a/pkgs/development/python-modules/pycapnp/default.nix b/pkgs/development/python-modules/pycapnp/default.nix
index ab9088cf1e5f1..7e8954e04d0c7 100644
--- a/pkgs/development/python-modules/pycapnp/default.nix
+++ b/pkgs/development/python-modules/pycapnp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , capnproto
 , cython
diff --git a/pkgs/development/python-modules/pycarddav/default.nix b/pkgs/development/python-modules/pycarddav/default.nix
index 7885cf65b83bf..b3479695a8909 100644
--- a/pkgs/development/python-modules/pycarddav/default.nix
+++ b/pkgs/development/python-modules/pycarddav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pycares/default.nix b/pkgs/development/python-modules/pycares/default.nix
index 8404063ac1f83..9b3ec94babcf6 100644
--- a/pkgs/development/python-modules/pycares/default.nix
+++ b/pkgs/development/python-modules/pycares/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pychart/default.nix b/pkgs/development/python-modules/pychart/default.nix
index 2c2399fca92ed..f020361474a18 100644
--- a/pkgs/development/python-modules/pychart/default.nix
+++ b/pkgs/development/python-modules/pychart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pychart";
diff --git a/pkgs/development/python-modules/pychef/default.nix b/pkgs/development/python-modules/pychef/default.nix
index 1702cde840cf7..ddd7dec820db0 100644
--- a/pkgs/development/python-modules/pychef/default.nix
+++ b/pkgs/development/python-modules/pychef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/pyclipper/default.nix b/pkgs/development/python-modules/pyclipper/default.nix
index e893895470966..27a2a1d808449 100644
--- a/pkgs/development/python-modules/pyclipper/default.nix
+++ b/pkgs/development/python-modules/pyclipper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , setuptools_scm
diff --git a/pkgs/development/python-modules/pycm/default.nix b/pkgs/development/python-modules/pycm/default.nix
index ada4eeeb556c9..8e0a9e3b152e6 100644
--- a/pkgs/development/python-modules/pycm/default.nix
+++ b/pkgs/development/python-modules/pycm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, numpy, pytest }:
 
 buildPythonPackage rec {
   pname = "pycm";
diff --git a/pkgs/development/python-modules/pycoin/default.nix b/pkgs/development/python-modules/pycoin/default.nix
index a21c8f6f549d0..d42cfcadfee56 100644
--- a/pkgs/development/python-modules/pycoin/default.nix
+++ b/pkgs/development/python-modules/pycoin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , gnupg
diff --git a/pkgs/development/python-modules/pycollada/default.nix b/pkgs/development/python-modules/pycollada/default.nix
index 4b177012f4edd..e8e0809c02221 100644
--- a/pkgs/development/python-modules/pycollada/default.nix
+++ b/pkgs/development/python-modules/pycollada/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, numpy, dateutil }:
+{ lib, fetchPypi, buildPythonPackage, numpy, dateutil }:
 
 buildPythonPackage rec {
   pname = "pycollada";
diff --git a/pkgs/development/python-modules/pycontracts/default.nix b/pkgs/development/python-modules/pycontracts/default.nix
index 0b511e024dc06..2a90bef725679 100644
--- a/pkgs/development/python-modules/pycontracts/default.nix
+++ b/pkgs/development/python-modules/pycontracts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyparsing, decorator, six, future }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pycountry/default.nix b/pkgs/development/python-modules/pycountry/default.nix
index b402e9092406b..525a56107118b 100644
--- a/pkgs/development/python-modules/pycountry/default.nix
+++ b/pkgs/development/python-modules/pycountry/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 ,
diff --git a/pkgs/development/python-modules/pycparser/default.nix b/pkgs/development/python-modules/pycparser/default.nix
index a246ce53a1e08..5fe7cab1cdb29 100644
--- a/pkgs/development/python-modules/pycparser/default.nix
+++ b/pkgs/development/python-modules/pycparser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python }:
+{ lib, buildPythonPackage, fetchPypi, python }:
 
 buildPythonPackage rec {
   pname = "pycparser";
diff --git a/pkgs/development/python-modules/pycryptopp/default.nix b/pkgs/development/python-modules/pycryptopp/default.nix
index 0f17d9e59a80e..7079cde0d597f 100644
--- a/pkgs/development/python-modules/pycryptopp/default.nix
+++ b/pkgs/development/python-modules/pycryptopp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pydenticon/default.nix b/pkgs/development/python-modules/pydenticon/default.nix
index 763cfb9b84565..44913e1de4763 100644
--- a/pkgs/development/python-modules/pydenticon/default.nix
+++ b/pkgs/development/python-modules/pydenticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/pydicom/default.nix b/pkgs/development/python-modules/pydicom/default.nix
index 08c5f099d28c9..be3cddc7c14a5 100644
--- a/pkgs/development/python-modules/pydicom/default.nix
+++ b/pkgs/development/python-modules/pydicom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/pydispatcher/default.nix b/pkgs/development/python-modules/pydispatcher/default.nix
index d132fad731380..d949b16d10577 100644
--- a/pkgs/development/python-modules/pydispatcher/default.nix
+++ b/pkgs/development/python-modules/pydispatcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pydns/default.nix b/pkgs/development/python-modules/pydns/default.nix
index a93820bfaef27..a6fb07c15206f 100644
--- a/pkgs/development/python-modules/pydns/default.nix
+++ b/pkgs/development/python-modules/pydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyechonest/default.nix b/pkgs/development/python-modules/pyechonest/default.nix
index 10ade4fa2cabe..83820629552fd 100644
--- a/pkgs/development/python-modules/pyechonest/default.nix
+++ b/pkgs/development/python-modules/pyechonest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k }:
 
 buildPythonPackage rec {
   pname = "pyechonest";
diff --git a/pkgs/development/python-modules/pyee/default.nix b/pkgs/development/python-modules/pyee/default.nix
index 712db3e87123e..7e388b93971ba 100644
--- a/pkgs/development/python-modules/pyee/default.nix
+++ b/pkgs/development/python-modules/pyee/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, stdenv, isPy27 }:
+{ buildPythonPackage, fetchPypi, lib, vcversioner, pytestrunner, mock, pytest, pytest-asyncio, pytest-trio, twisted, zipp, pyparsing, pyhamcrest, futures, attrs, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pyee";
diff --git a/pkgs/development/python-modules/pyemd/default.nix b/pkgs/development/python-modules/pyemd/default.nix
index 4e7594fbab5b7..c7b277a60989e 100644
--- a/pkgs/development/python-modules/pyemd/default.nix
+++ b/pkgs/development/python-modules/pyemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, cython }:
+{ lib, buildPythonPackage, fetchPypi, numpy, cython }:
 
 buildPythonPackage rec {
   pname = "pyemd";
diff --git a/pkgs/development/python-modules/pyexcelerator/default.nix b/pkgs/development/python-modules/pyexcelerator/default.nix
index 3738850739490..b3a376616d3b6 100644
--- a/pkgs/development/python-modules/pyexcelerator/default.nix
+++ b/pkgs/development/python-modules/pyexcelerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyext/default.nix b/pkgs/development/python-modules/pyext/default.nix
index befbd3c2de1de..eb88bf7858604 100644
--- a/pkgs/development/python-modules/pyext/default.nix
+++ b/pkgs/development/python-modules/pyext/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
     pname = "pyext";
diff --git a/pkgs/development/python-modules/pyfantom/default.nix b/pkgs/development/python-modules/pyfantom/default.nix
index a17388b34b5cf..d7c77e763e76c 100644
--- a/pkgs/development/python-modules/pyfantom/default.nix
+++ b/pkgs/development/python-modules/pyfantom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 }:
diff --git a/pkgs/development/python-modules/pyfftw/default.nix b/pkgs/development/python-modules/pyfftw/default.nix
index ff66dc8f8675c..155254a6af358 100644
--- a/pkgs/development/python-modules/pyfftw/default.nix
+++ b/pkgs/development/python-modules/pyfftw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , fftw, fftwFloat, fftwLongDouble, numpy, scipy, cython, dask }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyfiglet/default.nix b/pkgs/development/python-modules/pyfiglet/default.nix
index a4fe9ec9dfe69..e9671e03cb3bc 100644
--- a/pkgs/development/python-modules/pyfiglet/default.nix
+++ b/pkgs/development/python-modules/pyfiglet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.8.post1";
diff --git a/pkgs/development/python-modules/pyflakes/default.nix b/pkgs/development/python-modules/pyflakes/default.nix
index 2ff88a78a4e76..cf1b887818372 100644
--- a/pkgs/development/python-modules/pyflakes/default.nix
+++ b/pkgs/development/python-modules/pyflakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
+{ lib, buildPythonPackage, fetchPypi, pythonOlder, unittest2 }:
 
 buildPythonPackage rec {
   pname = "pyflakes";
diff --git a/pkgs/development/python-modules/pyftpdlib/default.nix b/pkgs/development/python-modules/pyftpdlib/default.nix
index 5d0d72eb4959d..b3aa456c4a9db 100644
--- a/pkgs/development/python-modules/pyftpdlib/default.nix
+++ b/pkgs/development/python-modules/pyftpdlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/pyfttt/default.nix b/pkgs/development/python-modules/pyfttt/default.nix
index 8648ad4f876d7..c8b52fce409ad 100644
--- a/pkgs/development/python-modules/pyfttt/default.nix
+++ b/pkgs/development/python-modules/pyfttt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygal/default.nix b/pkgs/development/python-modules/pygal/default.nix
index 6855c9e4f02ce..ec4cff2de615f 100644
--- a/pkgs/development/python-modules/pygal/default.nix
+++ b/pkgs/development/python-modules/pygal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
diff --git a/pkgs/development/python-modules/pygame_sdl2/default.nix b/pkgs/development/python-modules/pygame_sdl2/default.nix
index afca3dd7bc19e..00965b4a1495d 100644
--- a/pkgs/development/python-modules/pygame_sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame_sdl2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy27
+{ lib, buildPythonPackage, fetchurl, isPy27
 , cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygccxml/default.nix b/pkgs/development/python-modules/pygccxml/default.nix
index a1a6b0222b83d..7e06b27a23f63 100644
--- a/pkgs/development/python-modules/pygccxml/default.nix
+++ b/pkgs/development/python-modules/pygccxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, castxml, fetchFromGitHub, buildPythonPackage,
+{ lib, castxml, fetchFromGitHub, buildPythonPackage,
 llvmPackages }:
 buildPythonPackage rec {
   pname = "pygccxml";
diff --git a/pkgs/development/python-modules/pygeoip/default.nix b/pkgs/development/python-modules/pygeoip/default.nix
index 7aa16ac1e9a81..b9b588d669aed 100644
--- a/pkgs/development/python-modules/pygeoip/default.nix
+++ b/pkgs/development/python-modules/pygeoip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygments-better-html/default.nix b/pkgs/development/python-modules/pygments-better-html/default.nix
index 2e5d6271c66ac..152e9463b0e2e 100644
--- a/pkgs/development/python-modules/pygments-better-html/default.nix
+++ b/pkgs/development/python-modules/pygments-better-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
index 31a6b043494d8..0a88e34005cda 100644
--- a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
+++ b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pygments
diff --git a/pkgs/development/python-modules/pygpgme/default.nix b/pkgs/development/python-modules/pygpgme/default.nix
index 416410ab3ce75..29be02751bb2c 100644
--- a/pkgs/development/python-modules/pygpgme/default.nix
+++ b/pkgs/development/python-modules/pygpgme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPyPy
+{ lib, buildPythonPackage, fetchurl, isPyPy
 , gpgme }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygraphviz/default.nix b/pkgs/development/python-modules/pygraphviz/default.nix
index f239647bafa57..e9b66a95771b7 100644
--- a/pkgs/development/python-modules/pygraphviz/default.nix
+++ b/pkgs/development/python-modules/pygraphviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
+{ lib, buildPythonPackage, isPy3k, fetchPypi, substituteAll, graphviz
 , pkg-config, doctest-ignore-unicode, mock, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygreat/default.nix b/pkgs/development/python-modules/pygreat/default.nix
index 20a96d1f8f2c6..92526b465b17b 100644
--- a/pkgs/development/python-modules/pygreat/default.nix
+++ b/pkgs/development/python-modules/pygreat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
+{ lib, buildPythonPackage, isPy3k, fetchFromGitHub, future, pyusb }:
 
 buildPythonPackage {
   pname = "pygreat";
diff --git a/pkgs/development/python-modules/pygrok/default.nix b/pkgs/development/python-modules/pygrok/default.nix
index 8f694a117fe54..56d8b05af9a57 100644
--- a/pkgs/development/python-modules/pygrok/default.nix
+++ b/pkgs/development/python-modules/pygrok/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, regex, pytest }:
 
 buildPythonPackage rec {
   pname = "pygrok";
diff --git a/pkgs/development/python-modules/pyhamcrest/1.nix b/pkgs/development/python-modules/pyhamcrest/1.nix
index 5df52d9b658cb..4c2ec4df68104 100644
--- a/pkgs/development/python-modules/pyhamcrest/1.nix
+++ b/pkgs/development/python-modules/pyhamcrest/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhamcrest/default.nix b/pkgs/development/python-modules/pyhamcrest/default.nix
index a66e26b1319a2..fd6ba2f2df981 100644
--- a/pkgs/development/python-modules/pyhamcrest/default.nix
+++ b/pkgs/development/python-modules/pyhamcrest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest
 , six
 }:
diff --git a/pkgs/development/python-modules/pyhomematic/default.nix b/pkgs/development/python-modules/pyhomematic/default.nix
index 502d648b40073..65d3f60da0474 100644
--- a/pkgs/development/python-modules/pyhomematic/default.nix
+++ b/pkgs/development/python-modules/pyhomematic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pyhomematic";
diff --git a/pkgs/development/python-modules/pyicu/default.nix b/pkgs/development/python-modules/pyicu/default.nix
index 3512e33c81d75..e152002cdd150 100644
--- a/pkgs/development/python-modules/pyicu/default.nix
+++ b/pkgs/development/python-modules/pyicu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pyinotify/default.nix b/pkgs/development/python-modules/pyinotify/default.nix
index 92c2f5bb67175..e5714ec18001f 100644
--- a/pkgs/development/python-modules/pyinotify/default.nix
+++ b/pkgs/development/python-modules/pyinotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyinputevent/default.nix b/pkgs/development/python-modules/pyinputevent/default.nix
index a52a0bb400106..1d4f4cfa7847f 100644
--- a/pkgs/development/python-modules/pyinputevent/default.nix
+++ b/pkgs/development/python-modules/pyinputevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pykdtree/default.nix b/pkgs/development/python-modules/pykdtree/default.nix
index f37ddb2483e12..3161548f8b584 100644
--- a/pkgs/development/python-modules/pykdtree/default.nix
+++ b/pkgs/development/python-modules/pykdtree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
+{ lib, buildPythonPackage, fetchPypi, numpy, nose, openmp }:
 
 buildPythonPackage rec {
   pname = "pykdtree";
diff --git a/pkgs/development/python-modules/pykerberos/default.nix b/pkgs/development/python-modules/pykerberos/default.nix
index 07a32a25a0c60..13d7a4fd24831 100644
--- a/pkgs/development/python-modules/pykerberos/default.nix
+++ b/pkgs/development/python-modules/pykerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, krb5 }:
+{ lib, fetchPypi, buildPythonPackage, krb5 }:
 
 buildPythonPackage rec {
   pname = "pykerberos";
diff --git a/pkgs/development/python-modules/pykickstart/default.nix b/pkgs/development/python-modules/pykickstart/default.nix
index bc10295e232a6..8b1eefdafedc7 100644
--- a/pkgs/development/python-modules/pykickstart/default.nix
+++ b/pkgs/development/python-modules/pykickstart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , urlgrabber
diff --git a/pkgs/development/python-modules/pylast/default.nix b/pkgs/development/python-modules/pylast/default.nix
index 707554be55996..26812ff9151a4 100644
--- a/pkgs/development/python-modules/pylast/default.nix
+++ b/pkgs/development/python-modules/pylast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, certifi, six
+{ lib, buildPythonPackage, fetchPypi, isPy3k, certifi, six
 , setuptools_scm
 }:
 
diff --git a/pkgs/development/python-modules/pylibconfig2/default.nix b/pkgs/development/python-modules/pylibconfig2/default.nix
index 25989d0353e0a..2cabb78544eb0 100644
--- a/pkgs/development/python-modules/pylibconfig2/default.nix
+++ b/pkgs/development/python-modules/pylibconfig2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyparsing }:
+{ lib, buildPythonPackage, fetchPypi, pyparsing }:
 buildPythonPackage rec {
   pname = "pylibconfig2";
   version = "0.2.5";
diff --git a/pkgs/development/python-modules/pyliblo/default.nix b/pkgs/development/python-modules/pyliblo/default.nix
index 454f08fd10ed7..64f8e62c28626 100644
--- a/pkgs/development/python-modules/pyliblo/default.nix
+++ b/pkgs/development/python-modules/pyliblo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPyPy
diff --git a/pkgs/development/python-modules/pylibmc/default.nix b/pkgs/development/python-modules/pylibmc/default.nix
index 8bb62c0913480..9fb8401bdc476 100644
--- a/pkgs/development/python-modules/pylibmc/default.nix
+++ b/pkgs/development/python-modules/pylibmc/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, libmemcached, zlib, cyrus_sasl }:
+{ buildPythonPackage, fetchPypi, lib, libmemcached, zlib, cyrus_sasl }:
 
 buildPythonPackage rec {
   version = "1.6.1";
diff --git a/pkgs/development/python-modules/pymaging/default.nix b/pkgs/development/python-modules/pymaging/default.nix
index 3b35ce3e71663..8869924bddba7 100644
--- a/pkgs/development/python-modules/pymaging/default.nix
+++ b/pkgs/development/python-modules/pymaging/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pymaging_png/default.nix b/pkgs/development/python-modules/pymaging_png/default.nix
index 64ea5b4ff5b0a..6d12ddd40062c 100644
--- a/pkgs/development/python-modules/pymaging_png/default.nix
+++ b/pkgs/development/python-modules/pymaging_png/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pymaging
diff --git a/pkgs/development/python-modules/pymatgen/default.nix b/pkgs/development/python-modules/pymatgen/default.nix
index 84fcdbef6a3fd..bae7a5613239c 100644
--- a/pkgs/development/python-modules/pymatgen/default.nix
+++ b/pkgs/development/python-modules/pymatgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , enum34
 , glibcLocales
 , matplotlib
diff --git a/pkgs/development/python-modules/pymeeus/default.nix b/pkgs/development/python-modules/pymeeus/default.nix
index 96fb9d6f6943e..13e80a38e4b57 100644
--- a/pkgs/development/python-modules/pymeeus/default.nix
+++ b/pkgs/development/python-modules/pymeeus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "PyMeeus";
diff --git a/pkgs/development/python-modules/pymemoize/default.nix b/pkgs/development/python-modules/pymemoize/default.nix
index b44ff9fef4912..f66a6ef702b03 100644
--- a/pkgs/development/python-modules/pymemoize/default.nix
+++ b/pkgs/development/python-modules/pymemoize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , django
diff --git a/pkgs/development/python-modules/pymetar/default.nix b/pkgs/development/python-modules/pymetar/default.nix
index 84139091ae49c..72a17f27dca91 100644
--- a/pkgs/development/python-modules/pymetar/default.nix
+++ b/pkgs/development/python-modules/pymetar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, buildPythonPackage, isPy3k, fetchPypi }:
+{ lib, python, buildPythonPackage, isPy3k, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pymetar";
diff --git a/pkgs/development/python-modules/pymetno/default.nix b/pkgs/development/python-modules/pymetno/default.nix
index 2b10e2f164fb9..b3d91c595d808 100644
--- a/pkgs/development/python-modules/pymetno/default.nix
+++ b/pkgs/development/python-modules/pymetno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/pymsgbox/default.nix b/pkgs/development/python-modules/pymsgbox/default.nix
index d69c0011ac539..84ab3dcab1bf1 100644
--- a/pkgs/development/python-modules/pymsgbox/default.nix
+++ b/pkgs/development/python-modules/pymsgbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tkinter }:
+{ lib, fetchPypi, buildPythonPackage, tkinter }:
 
 buildPythonPackage rec {
   pname = "PyMsgBox";
diff --git a/pkgs/development/python-modules/pymupdf/default.nix b/pkgs/development/python-modules/pymupdf/default.nix
index 8ce7d5a19c6f5..501f829dc142a 100644
--- a/pkgs/development/python-modules/pymupdf/default.nix
+++ b/pkgs/development/python-modules/pymupdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mupdf, swig }:
+{ lib, buildPythonPackage, fetchPypi, mupdf, swig }:
 buildPythonPackage rec {
   pname = "pymupdf";
   version = "1.18.0";
diff --git a/pkgs/development/python-modules/pymysqlsa/default.nix b/pkgs/development/python-modules/pymysqlsa/default.nix
index 6009b03e50866..49b5a49193de2 100644
--- a/pkgs/development/python-modules/pymysqlsa/default.nix
+++ b/pkgs/development/python-modules/pymysqlsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pymysql
diff --git a/pkgs/development/python-modules/pynac/default.nix b/pkgs/development/python-modules/pynac/default.nix
index 656825a36bbb1..a6df8cb036d4e 100644
--- a/pkgs/development/python-modules/pynac/default.nix
+++ b/pkgs/development/python-modules/pynac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 }:
diff --git a/pkgs/development/python-modules/pynacl/default.nix b/pkgs/development/python-modules/pynacl/default.nix
index be69bf3d8023c..37cf0a9ef10ad 100644
--- a/pkgs/development/python-modules/pynacl/default.nix
+++ b/pkgs/development/python-modules/pynacl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pynest2d/default.nix b/pkgs/development/python-modules/pynest2d/default.nix
index 6214f3db42b2d..7ca72293382d3 100644
--- a/pkgs/development/python-modules/pynest2d/default.nix
+++ b/pkgs/development/python-modules/pynest2d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python3, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python3, cmake
 , pythonOlder, libnest2d, sip, clipper }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pynisher/default.nix b/pkgs/development/python-modules/pynisher/default.nix
index 0ecac704e1e85..28e9922e17209 100644
--- a/pkgs/development/python-modules/pynisher/default.nix
+++ b/pkgs/development/python-modules/pynisher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, psutil, docutils }:
+{ lib, buildPythonPackage, fetchPypi, psutil, docutils }:
 
 buildPythonPackage rec {
   pname = "pynisher";
diff --git a/pkgs/development/python-modules/pynzb/default.nix b/pkgs/development/python-modules/pynzb/default.nix
index 294c2374f537d..3f1cca75dc15c 100644
--- a/pkgs/development/python-modules/pynzb/default.nix
+++ b/pkgs/development/python-modules/pynzb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pyodbc/default.nix b/pkgs/development/python-modules/pyodbc/default.nix
index 2dec1d8705bb6..8f2686a79145c 100644
--- a/pkgs/development/python-modules/pyodbc/default.nix
+++ b/pkgs/development/python-modules/pyodbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
+{ lib, buildPythonPackage, fetchPypi, isPyPy, unixODBC }:
 
 buildPythonPackage rec {
   pname = "pyodbc";
diff --git a/pkgs/development/python-modules/pyopencl/default.nix b/pkgs/development/python-modules/pyopencl/default.nix
index 4171eaeeb57e4..cf881a580482b 100644
--- a/pkgs/development/python-modules/pyopencl/default.nix
+++ b/pkgs/development/python-modules/pyopencl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , Mako
diff --git a/pkgs/development/python-modules/pyopengl-accelerate/default.nix b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
index 23de6b2323f03..c6839bba98962 100644
--- a/pkgs/development/python-modules/pyopengl-accelerate/default.nix
+++ b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypandoc/default.nix b/pkgs/development/python-modules/pypandoc/default.nix
index ffe7bf014232f..c54e220228abb 100644
--- a/pkgs/development/python-modules/pypandoc/default.nix
+++ b/pkgs/development/python-modules/pypandoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch
 , pandoc, haskellPackages, texlive }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pypdf/default.nix b/pkgs/development/python-modules/pypdf/default.nix
index d69b1078aeeff..1244f374b44c9 100644
--- a/pkgs/development/python-modules/pypdf/default.nix
+++ b/pkgs/development/python-modules/pypdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pypdf2/default.nix b/pkgs/development/python-modules/pypdf2/default.nix
index cd91cc347a4f9..26d27f4455afd 100644
--- a/pkgs/development/python-modules/pypdf2/default.nix
+++ b/pkgs/development/python-modules/pypdf2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , glibcLocales
diff --git a/pkgs/development/python-modules/pypeg2/default.nix b/pkgs/development/python-modules/pypeg2/default.nix
index 1f16a307a0c1b..8b630f743d198 100644
--- a/pkgs/development/python-modules/pypeg2/default.nix
+++ b/pkgs/development/python-modules/pypeg2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyphen/default.nix b/pkgs/development/python-modules/pyphen/default.nix
index d8b9abcf97a39..2f573b67838bc 100644
--- a/pkgs/development/python-modules/pyphen/default.nix
+++ b/pkgs/development/python-modules/pyphen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "Pyphen";
diff --git a/pkgs/development/python-modules/pypillowfight/default.nix b/pkgs/development/python-modules/pypillowfight/default.nix
index bc0e453599906..1fc4198ebeb6e 100644
--- a/pkgs/development/python-modules/pypillowfight/default.nix
+++ b/pkgs/development/python-modules/pypillowfight/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitLab, nose, pillow
+{ lib, buildPythonPackage, fetchFromGitLab, nose, pillow
 , isPy3k, isPyPy
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyplatec/default.nix b/pkgs/development/python-modules/pyplatec/default.nix
index 8747840fd7c0c..0c8c6c4328af1 100644
--- a/pkgs/development/python-modules/pyplatec/default.nix
+++ b/pkgs/development/python-modules/pyplatec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pypoppler/default.nix b/pkgs/development/python-modules/pypoppler/default.nix
index 83190bc292ab1..348f917150221 100644
--- a/pkgs/development/python-modules/pypoppler/default.nix
+++ b/pkgs/development/python-modules/pypoppler/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyprind/default.nix b/pkgs/development/python-modules/pyprind/default.nix
index d270136558fc5..9c13a95357018 100644
--- a/pkgs/development/python-modules/pyprind/default.nix
+++ b/pkgs/development/python-modules/pyprind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , psutil
 , pytest }:
 
diff --git a/pkgs/development/python-modules/pyptlib/default.nix b/pkgs/development/python-modules/pyptlib/default.nix
index af2575d21431b..9f9f99884b985 100644
--- a/pkgs/development/python-modules/pyptlib/default.nix
+++ b/pkgs/development/python-modules/pyptlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pypugjs/default.nix b/pkgs/development/python-modules/pypugjs/default.nix
index b806177b4d7d7..22ac89cf6a902 100644
--- a/pkgs/development/python-modules/pypugjs/default.nix
+++ b/pkgs/development/python-modules/pypugjs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, six, chardet, nose
 , django, jinja2, tornado, pyramid, pyramid_mako, Mako }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyqtgraph/default.nix b/pkgs/development/python-modules/pyqtgraph/default.nix
index 98b30b247077c..f43bfb9aaa6eb 100644
--- a/pkgs/development/python-modules/pyqtgraph/default.nix
+++ b/pkgs/development/python-modules/pyqtgraph/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/pyquery/default.nix b/pkgs/development/python-modules/pyquery/default.nix
index 2496d9d968fc7..2bb2eb1c6fccc 100644
--- a/pkgs/development/python-modules/pyquery/default.nix
+++ b/pkgs/development/python-modules/pyquery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cssselect
diff --git a/pkgs/development/python-modules/pyramid/default.nix b/pkgs/development/python-modules/pyramid/default.nix
index 5f1e5c7d75a85..44ac5a9221adb 100644
--- a/pkgs/development/python-modules/pyramid/default.nix
+++ b/pkgs/development/python-modules/pyramid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_beaker/default.nix b/pkgs/development/python-modules/pyramid_beaker/default.nix
index 88dc62886fc6f..5c4e7c104bf0e 100644
--- a/pkgs/development/python-modules/pyramid_beaker/default.nix
+++ b/pkgs/development/python-modules/pyramid_beaker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
+{ lib, buildPythonPackage, fetchPypi, pytest, beaker, pyramid }:
 
 buildPythonPackage rec {
   pname = "pyramid_beaker";
diff --git a/pkgs/development/python-modules/pyramid_chameleon/default.nix b/pkgs/development/python-modules/pyramid_chameleon/default.nix
index 2bb5a03bdb912..d3388fdff359e 100644
--- a/pkgs/development/python-modules/pyramid_chameleon/default.nix
+++ b/pkgs/development/python-modules/pyramid_chameleon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , chameleon
diff --git a/pkgs/development/python-modules/pyramid_exclog/default.nix b/pkgs/development/python-modules/pyramid_exclog/default.nix
index 80514cc91b481..55da77f496443 100644
--- a/pkgs/development/python-modules/pyramid_exclog/default.nix
+++ b/pkgs/development/python-modules/pyramid_exclog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_hawkauth/default.nix b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
index ab4025b72309e..f2f156e98b676 100644
--- a/pkgs/development/python-modules/pyramid_hawkauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_hawkauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pyramid
diff --git a/pkgs/development/python-modules/pyramid_jinja2/default.nix b/pkgs/development/python-modules/pyramid_jinja2/default.nix
index 0497ab79613f2..464d8d209bfbd 100644
--- a/pkgs/development/python-modules/pyramid_jinja2/default.nix
+++ b/pkgs/development/python-modules/pyramid_jinja2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_mako/default.nix b/pkgs/development/python-modules/pyramid_mako/default.nix
index 8c71563e2d773..2f8c5e1e0753d 100644
--- a/pkgs/development/python-modules/pyramid_mako/default.nix
+++ b/pkgs/development/python-modules/pyramid_mako/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webtest
diff --git a/pkgs/development/python-modules/pyramid_multiauth/default.nix b/pkgs/development/python-modules/pyramid_multiauth/default.nix
index 9167918fc47d3..545883a25c1ae 100644
--- a/pkgs/development/python-modules/pyramid_multiauth/default.nix
+++ b/pkgs/development/python-modules/pyramid_multiauth/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyramid
diff --git a/pkgs/development/python-modules/pyreport/default.nix b/pkgs/development/python-modules/pyreport/default.nix
index 09a1e7c6b4180..6b9649699ba38 100644
--- a/pkgs/development/python-modules/pyreport/default.nix
+++ b/pkgs/development/python-modules/pyreport/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyres/default.nix b/pkgs/development/python-modules/pyres/default.nix
index 6d49bd025948c..b1d5f4efb090e 100644
--- a/pkgs/development/python-modules/pyres/default.nix
+++ b/pkgs/development/python-modules/pyres/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
+{ lib, fetchPypi, buildPythonPackage, fetchFromGitHub, simplejson, redis, setproctitle, nose, pkgs }:
 
 let
 
diff --git a/pkgs/development/python-modules/pyrfc3339/default.nix b/pkgs/development/python-modules/pyrfc3339/default.nix
index f6be3c4c8974b..9885d4f5443fa 100644
--- a/pkgs/development/python-modules/pyrfc3339/default.nix
+++ b/pkgs/development/python-modules/pyrfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytz
diff --git a/pkgs/development/python-modules/pyro4/default.nix b/pkgs/development/python-modules/pyro4/default.nix
index a84b22e06567d..626560d89b6d8 100644
--- a/pkgs/development/python-modules/pyro4/default.nix
+++ b/pkgs/development/python-modules/pyro4/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , serpent
 , dill
diff --git a/pkgs/development/python-modules/pyroma/default.nix b/pkgs/development/python-modules/pyroma/default.nix
index e533f6501697d..bddf2413970c6 100644
--- a/pkgs/development/python-modules/pyroma/default.nix
+++ b/pkgs/development/python-modules/pyroma/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , docutils, pygments, setuptools
 }:
 
diff --git a/pkgs/development/python-modules/pyroute2/default.nix b/pkgs/development/python-modules/pyroute2/default.nix
index f2378863720c4..e5c87a94b0745 100644
--- a/pkgs/development/python-modules/pyroute2/default.nix
+++ b/pkgs/development/python-modules/pyroute2/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, buildPythonPackage, fetchPypi}:
+{lib, buildPythonPackage, fetchPypi}:
 
 buildPythonPackage rec {
   pname = "pyroute2";
diff --git a/pkgs/development/python-modules/pyrr/default.nix b/pkgs/development/python-modules/pyrr/default.nix
index f8ac5d8e86759..cb1da5238681a 100644
--- a/pkgs/development/python-modules/pyrr/default.nix
+++ b/pkgs/development/python-modules/pyrr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools
diff --git a/pkgs/development/python-modules/pyrsistent/default.nix b/pkgs/development/python-modules/pyrsistent/default.nix
index 211bc85f5112e..79f6666474e62 100644
--- a/pkgs/development/python-modules/pyrsistent/default.nix
+++ b/pkgs/development/python-modules/pyrsistent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pyrss2gen/default.nix b/pkgs/development/python-modules/pyrss2gen/default.nix
index e3586e6dbf1c4..4a7dc788caaac 100644
--- a/pkgs/development/python-modules/pyrss2gen/default.nix
+++ b/pkgs/development/python-modules/pyrss2gen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pysaml2/default.nix b/pkgs/development/python-modules/pysaml2/default.nix
index 7d2fdb5b42601..2ffbb97223f06 100644
--- a/pkgs/development/python-modules/pysaml2/default.nix
+++ b/pkgs/development/python-modules/pysaml2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index 6da19bc48ab83..e4e7791fa79a9 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/pysendfile/default.nix b/pkgs/development/python-modules/pysendfile/default.nix
index a35f2ae77f02d..1a7c783e8291f 100644
--- a/pkgs/development/python-modules/pysendfile/default.nix
+++ b/pkgs/development/python-modules/pysendfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/pysensors/default.nix b/pkgs/development/python-modules/pysensors/default.nix
index 214412c4ceede..8cff62b89c1fe 100644
--- a/pkgs/development/python-modules/pysensors/default.nix
+++ b/pkgs/development/python-modules/pysensors/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
+{ lib, buildPythonPackage, python, fetchFromGitHub, lm_sensors }:
 buildPythonPackage {
   version = "2017-07-13";
   pname = "pysensors";
diff --git a/pkgs/development/python-modules/pyserial-asyncio/default.nix b/pkgs/development/python-modules/pyserial-asyncio/default.nix
index ff3d624490bae..54f3f80a3f8fc 100644
--- a/pkgs/development/python-modules/pyserial-asyncio/default.nix
+++ b/pkgs/development/python-modules/pyserial-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pyserial }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysftp/default.nix b/pkgs/development/python-modules/pysftp/default.nix
index 28daf6b385e61..3333a30bd1ac7 100644
--- a/pkgs/development/python-modules/pysftp/default.nix
+++ b/pkgs/development/python-modules/pysftp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/pyshp/default.nix b/pkgs/development/python-modules/pyshp/default.nix
index 661c70a0ab26d..7f494e98ad223 100644
--- a/pkgs/development/python-modules/pyshp/default.nix
+++ b/pkgs/development/python-modules/pyshp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysigset/default.nix b/pkgs/development/python-modules/pysigset/default.nix
index 8e31735db2e42..ccacb412924ff 100644
--- a/pkgs/development/python-modules/pysigset/default.nix
+++ b/pkgs/development/python-modules/pysigset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "pysigset";
diff --git a/pkgs/development/python-modules/pysmbc/default.nix b/pkgs/development/python-modules/pysmbc/default.nix
index 6834a78f4286f..bea1438f67945 100644
--- a/pkgs/development/python-modules/pysmbc/default.nix
+++ b/pkgs/development/python-modules/pysmbc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , samba, pkg-config
 , setuptools }:
 
diff --git a/pkgs/development/python-modules/pysmf/default.nix b/pkgs/development/python-modules/pysmf/default.nix
index 02559510100cd..25f5fc6a20caa 100644
--- a/pkgs/development/python-modules/pysmf/default.nix
+++ b/pkgs/development/python-modules/pysmf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pkg-config, libsmf, glib, pytest }:
 
 buildPythonPackage rec {
   pname = "pysmf";
diff --git a/pkgs/development/python-modules/pysmi/default.nix b/pkgs/development/python-modules/pysmi/default.nix
index 953581aa30298..7b96b97f0bb9c 100644
--- a/pkgs/development/python-modules/pysmi/default.nix
+++ b/pkgs/development/python-modules/pysmi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ply
diff --git a/pkgs/development/python-modules/pysnmp/default.nix b/pkgs/development/python-modules/pysnmp/default.nix
index 7dce4d9b4d183..0b0e298d5d001 100644
--- a/pkgs/development/python-modules/pysnmp/default.nix
+++ b/pkgs/development/python-modules/pysnmp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/pysocks/default.nix b/pkgs/development/python-modules/pysocks/default.nix
index 79c163726b76d..70fb74ab4ddfa 100644
--- a/pkgs/development/python-modules/pysocks/default.nix
+++ b/pkgs/development/python-modules/pysocks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pyspark/default.nix b/pkgs/development/python-modules/pyspark/default.nix
index 342755131a3d4..f8a7c09b40717 100644
--- a/pkgs/development/python-modules/pyspark/default.nix
+++ b/pkgs/development/python-modules/pyspark/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv, py4j }:
+{ buildPythonPackage, fetchPypi, lib, py4j }:
 
 buildPythonPackage rec {
   pname = "pyspark";
diff --git a/pkgs/development/python-modules/pysqueezebox/default.nix b/pkgs/development/python-modules/pysqueezebox/default.nix
index 7c5d8ca5abf58..8445f6d7e89eb 100644
--- a/pkgs/development/python-modules/pysqueezebox/default.nix
+++ b/pkgs/development/python-modules/pysqueezebox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
+{ lib, fetchPypi, buildPythonPackage, pythonOlder, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pysqueezebox";
diff --git a/pkgs/development/python-modules/pysrt/default.nix b/pkgs/development/python-modules/pysrt/default.nix
index 4012a73246600..1099bffc40f0a 100644
--- a/pkgs/development/python-modules/pysrt/default.nix
+++ b/pkgs/development/python-modules/pysrt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , chardet
diff --git a/pkgs/development/python-modules/pyssim/default.nix b/pkgs/development/python-modules/pyssim/default.nix
index 4f73ada61af61..cdbbfeabf8879 100644
--- a/pkgs/development/python-modules/pyssim/default.nix
+++ b/pkgs/development/python-modules/pyssim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
+{ lib, buildPythonPackage, fetchFromGitHub, numpy, scipy, pillow }:
 
 buildPythonPackage rec {
   pname = "pyssim";
diff --git a/pkgs/development/python-modules/pystache/default.nix b/pkgs/development/python-modules/pystache/default.nix
index 6ed036aecb1ad..c93655e10a8ed 100644
--- a/pkgs/development/python-modules/pystache/default.nix
+++ b/pkgs/development/python-modules/pystache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
+{ lib, buildPythonPackage, python, fetchPypi, isPy3k, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "pystache";
diff --git a/pkgs/development/python-modules/pystemd/default.nix b/pkgs/development/python-modules/pystemd/default.nix
index 6918659194906..e77dd605388a9 100644
--- a/pkgs/development/python-modules/pystemd/default.nix
+++ b/pkgs/development/python-modules/pystemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, systemd }:
+{ lib, python, systemd }:
 
 python.pkgs.buildPythonPackage rec {
   pname = "pystemd";
diff --git a/pkgs/development/python-modules/pystemmer/default.nix b/pkgs/development/python-modules/pystemmer/default.nix
index 0ba23ffec5dfd..120867f389cce 100644
--- a/pkgs/development/python-modules/pystemmer/default.nix
+++ b/pkgs/development/python-modules/pystemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python, fetchPypi, buildPythonPackage, cython }:
+{ lib, python, fetchPypi, buildPythonPackage, cython }:
 
 buildPythonPackage rec {
   pname = "PyStemmer";
diff --git a/pkgs/development/python-modules/pytabix/default.nix b/pkgs/development/python-modules/pytabix/default.nix
index db8437d8957c7..fb2e622eac9c0 100644
--- a/pkgs/development/python-modules/pytabix/default.nix
+++ b/pkgs/development/python-modules/pytabix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/pytado/default.nix b/pkgs/development/python-modules/pytado/default.nix
index 636210c93d599..a54c89f348dd7 100644
--- a/pkgs/development/python-modules/pytado/default.nix
+++ b/pkgs/development/python-modules/pytado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "PyTado";
diff --git a/pkgs/development/python-modules/pyte/default.nix b/pkgs/development/python-modules/pyte/default.nix
index 65d3d9218d065..e930f1d5717fa 100644
--- a/pkgs/development/python-modules/pyte/default.nix
+++ b/pkgs/development/python-modules/pyte/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, wcwidth }:
 
 buildPythonPackage rec {
   pname = "pyte";
diff --git a/pkgs/development/python-modules/pytest-aiohttp/default.nix b/pkgs/development/python-modules/pytest-aiohttp/default.nix
index 7384eb3607046..fad9a70af0ffe 100644
--- a/pkgs/development/python-modules/pytest-aiohttp/default.nix
+++ b/pkgs/development/python-modules/pytest-aiohttp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, aiohttp }:
+{ lib, buildPythonPackage, fetchPypi, pytest, aiohttp }:
 
 buildPythonPackage rec {
   pname = "pytest-aiohttp";
diff --git a/pkgs/development/python-modules/pytest-annotate/default.nix b/pkgs/development/python-modules/pytest-annotate/default.nix
index 1a7f77bf9b6e5..68b67f061bb14 100644
--- a/pkgs/development/python-modules/pytest-annotate/default.nix
+++ b/pkgs/development/python-modules/pytest-annotate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyannotate
diff --git a/pkgs/development/python-modules/pytest-ansible/default.nix b/pkgs/development/python-modules/pytest-ansible/default.nix
index 309a33e89073e..4ca6bdac6e963 100644
--- a/pkgs/development/python-modules/pytest-ansible/default.nix
+++ b/pkgs/development/python-modules/pytest-ansible/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ansible
diff --git a/pkgs/development/python-modules/pytest-asyncio/default.nix b/pkgs/development/python-modules/pytest-asyncio/default.nix
index c621d9a478544..0f37d09a9e070 100644
--- a/pkgs/development/python-modules/pytest-asyncio/default.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
+{ lib, buildPythonPackage, fetchPypi, pytest, isPy3k, isPy35, async_generator }:
 buildPythonPackage rec {
   pname = "pytest-asyncio";
   version = "0.14.0";
diff --git a/pkgs/development/python-modules/pytest-bdd/default.nix b/pkgs/development/python-modules/pytest-bdd/default.nix
index 493a2307e7e7e..83757c2e1665d 100644
--- a/pkgs/development/python-modules/pytest-bdd/default.nix
+++ b/pkgs/development/python-modules/pytest-bdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , execnet
 , glob2
 , Mako
diff --git a/pkgs/development/python-modules/pytest-catchlog/default.nix b/pkgs/development/python-modules/pytest-catchlog/default.nix
index 2fb02244d1d7c..39c26a3e0f36a 100644
--- a/pkgs/development/python-modules/pytest-catchlog/default.nix
+++ b/pkgs/development/python-modules/pytest-catchlog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, unzip }:
+{ lib, buildPythonPackage, fetchPypi, pytest, unzip }:
 
 buildPythonPackage rec {
   pname = "pytest-catchlog";
diff --git a/pkgs/development/python-modules/pytest-celery/default.nix b/pkgs/development/python-modules/pytest-celery/default.nix
index 034c657b5b0fe..414cf1ecc9cb9 100644
--- a/pkgs/development/python-modules/pytest-celery/default.nix
+++ b/pkgs/development/python-modules/pytest-celery/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
+{ lib, buildPythonPackage, fetchPypi, pytest, setuptools_scm }:
 
 buildPythonPackage rec {
   pname = "pytest-celery";
diff --git a/pkgs/development/python-modules/pytest-check/default.nix b/pkgs/development/python-modules/pytest-check/default.nix
index 41f316a18a659..a0ae504746d5d 100644
--- a/pkgs/development/python-modules/pytest-check/default.nix
+++ b/pkgs/development/python-modules/pytest-check/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-cov/default.nix b/pkgs/development/python-modules/pytest-cov/default.nix
index aa921ddeb3d1b..003d7e14ab596 100644
--- a/pkgs/development/python-modules/pytest-cov/default.nix
+++ b/pkgs/development/python-modules/pytest-cov/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, coverage }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-datadir/default.nix b/pkgs/development/python-modules/pytest-datadir/default.nix
index b1cdb1033a64f..1dc218c08085c 100644
--- a/pkgs/development/python-modules/pytest-datadir/default.nix
+++ b/pkgs/development/python-modules/pytest-datadir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , setuptools_scm, pytest, cmake
 }:
 
diff --git a/pkgs/development/python-modules/pytest-datafiles/default.nix b/pkgs/development/python-modules/pytest-datafiles/default.nix
index bc6e2441b0f07..bdcab2788ae47 100644
--- a/pkgs/development/python-modules/pytest-datafiles/default.nix
+++ b/pkgs/development/python-modules/pytest-datafiles/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py, pytest }:
+{ lib, buildPythonPackage, fetchPypi, py, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-datafiles";
diff --git a/pkgs/development/python-modules/pytest-dependency/default.nix b/pkgs/development/python-modules/pytest-dependency/default.nix
index 9a3dbed55b152..7108a8f4c1764 100644
--- a/pkgs/development/python-modules/pytest-dependency/default.nix
+++ b/pkgs/development/python-modules/pytest-dependency/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, pytest }:
 
 buildPythonPackage rec {
   version = "0.5.1";
diff --git a/pkgs/development/python-modules/pytest-django/default.nix b/pkgs/development/python-modules/pytest-django/default.nix
index 069aa2812eb58..bfcda812529e2 100644
--- a/pkgs/development/python-modules/pytest-django/default.nix
+++ b/pkgs/development/python-modules/pytest-django/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-fixture-config/default.nix b/pkgs/development/python-modules/pytest-fixture-config/default.nix
index 061f62bfc17bf..32392f8f14ce5 100644
--- a/pkgs/development/python-modules/pytest-fixture-config/default.nix
+++ b/pkgs/development/python-modules/pytest-fixture-config/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , setuptools-git, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-flakes/default.nix b/pkgs/development/python-modules/pytest-flakes/default.nix
index fd4ed0978060e..805c19751ed1a 100644
--- a/pkgs/development/python-modules/pytest-flakes/default.nix
+++ b/pkgs/development/python-modules/pytest-flakes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest
 , pyflakes
 }:
diff --git a/pkgs/development/python-modules/pytest-flask/default.nix b/pkgs/development/python-modules/pytest-flask/default.nix
index 74e33a7731b37..7b459b4a294c8 100644
--- a/pkgs/development/python-modules/pytest-flask/default.nix
+++ b/pkgs/development/python-modules/pytest-flask/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, flask, werkzeug, setuptools_scm, isPy27 }:
 
 buildPythonPackage rec {
   pname = "pytest-flask";
diff --git a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
index 41263ce692b3f..c634aa00718e9 100644
--- a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
+++ b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchFromGitHub
 , pytest
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-html/default.nix b/pkgs/development/python-modules/pytest-html/default.nix
index 0b1090f7b81d0..1b09d6863b976 100644
--- a/pkgs/development/python-modules/pytest-html/default.nix
+++ b/pkgs/development/python-modules/pytest-html/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonOlder
 , pytest, pytest-metadata, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-metadata/default.nix b/pkgs/development/python-modules/pytest-metadata/default.nix
index e8b224dc1d4d9..f7766003be108 100644
--- a/pkgs/development/python-modules/pytest-metadata/default.nix
+++ b/pkgs/development/python-modules/pytest-metadata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, setuptools_scm }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-mpl/default.nix b/pkgs/development/python-modules/pytest-mpl/default.nix
index 0cc3a993c2353..30a2757ecf323 100644
--- a/pkgs/development/python-modules/pytest-mpl/default.nix
+++ b/pkgs/development/python-modules/pytest-mpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-pep257/default.nix b/pkgs/development/python-modules/pytest-pep257/default.nix
index eb5203c02466c..827386786b795 100644
--- a/pkgs/development/python-modules/pytest-pep257/default.nix
+++ b/pkgs/development/python-modules/pytest-pep257/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pep257 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pep257 }:
 
 buildPythonPackage rec {
   pname = "pytest-pep257";
diff --git a/pkgs/development/python-modules/pytest-quickcheck/default.nix b/pkgs/development/python-modules/pytest-quickcheck/default.nix
index 5148fa4b76080..4e08a8fabba0c 100644
--- a/pkgs/development/python-modules/pytest-quickcheck/default.nix
+++ b/pkgs/development/python-modules/pytest-quickcheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytest-flakes, tox }:
 buildPythonPackage rec {
   pname = "pytest-quickcheck";
   version = "0.8.6";
diff --git a/pkgs/development/python-modules/pytest-raisesregexp/default.nix b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
index 0d02a25ec3c7b..78b99714378f6 100644
--- a/pkgs/development/python-modules/pytest-raisesregexp/default.nix
+++ b/pkgs/development/python-modules/pytest-raisesregexp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , py, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-random-order/default.nix b/pkgs/development/python-modules/pytest-random-order/default.nix
index 2def886c5cba2..d84bb3c9acf94 100644
--- a/pkgs/development/python-modules/pytest-random-order/default.nix
+++ b/pkgs/development/python-modules/pytest-random-order/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/pytest-relaxed/default.nix b/pkgs/development/python-modules/pytest-relaxed/default.nix
index 401307039e551..19d031b6a2b16 100644
--- a/pkgs/development/python-modules/pytest-relaxed/default.nix
+++ b/pkgs/development/python-modules/pytest-relaxed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/pytest-rerunfailures/default.nix b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
index 537f32316a315..1bd91fe70f780 100644
--- a/pkgs/development/python-modules/pytest-rerunfailures/default.nix
+++ b/pkgs/development/python-modules/pytest-rerunfailures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "pytest-rerunfailures";
diff --git a/pkgs/development/python-modules/pytest-server-fixtures/default.nix b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
index 41fcfc7b1597c..ca3c9a37c1a90 100644
--- a/pkgs/development/python-modules/pytest-server-fixtures/default.nix
+++ b/pkgs/development/python-modules/pytest-server-fixtures/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytest-shutil, pytest-fixture-config, psutil
 , requests, future, retry }:
 
diff --git a/pkgs/development/python-modules/pytest-shutil/default.nix b/pkgs/development/python-modules/pytest-shutil/default.nix
index 3edafdfb47342..9d088e44f8d7a 100644
--- a/pkgs/development/python-modules/pytest-shutil/default.nix
+++ b/pkgs/development/python-modules/pytest-shutil/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, isPyPy, buildPythonPackage, fetchPypi
+{ lib, isPyPy, buildPythonPackage, fetchPypi
 , pytest, cmdline, pytestcov, coverage, setuptools-git, mock, pathpy, execnet
 , contextlib2, termcolor }:
 
diff --git a/pkgs/development/python-modules/pytest-subtesthack/default.nix b/pkgs/development/python-modules/pytest-subtesthack/default.nix
index f7454ee644ca9..5006ac51150f2 100644
--- a/pkgs/development/python-modules/pytest-subtesthack/default.nix
+++ b/pkgs/development/python-modules/pytest-subtesthack/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-subtesthack";
diff --git a/pkgs/development/python-modules/pytest-virtualenv/default.nix b/pkgs/development/python-modules/pytest-virtualenv/default.nix
index a910bf3245f42..8ea981ba2e7a7 100644
--- a/pkgs/development/python-modules/pytest-virtualenv/default.nix
+++ b/pkgs/development/python-modules/pytest-virtualenv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, pytestcov, mock, cmdline, pytest-fixture-config, pytest-shutil, virtualenv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/1.nix b/pkgs/development/python-modules/pytest-xdist/1.nix
index 0c5ae06e86111..fa794f94141a9 100644
--- a/pkgs/development/python-modules/pytest-xdist/1.nix
+++ b/pkgs/development/python-modules/pytest-xdist/1.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-xdist/default.nix b/pkgs/development/python-modules/pytest-xdist/default.nix
index e5019f842fee5..30e43c17c9195 100644
--- a/pkgs/development/python-modules/pytest-xdist/default.nix
+++ b/pkgs/development/python-modules/pytest-xdist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, execnet, pytest_6
+{ lib, fetchPypi, buildPythonPackage, execnet, pytest_6
 , setuptools_scm, pytest-forked, filelock, psutil, six, isPy3k }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest/4.nix b/pkgs/development/python-modules/pytest/4.nix
index 63e57a7f769b5..f30eec15a0a8a 100644
--- a/pkgs/development/python-modules/pytest/4.nix
+++ b/pkgs/development/python-modules/pytest/4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, attrs, hypothesis, py
 , setuptools_scm, setuptools, six, pluggy, funcsigs, isPy3k, more-itertools
 , atomicwrites, mock, writeText, pathlib2, wcwidth, packaging, isPyPy
 }:
diff --git a/pkgs/development/python-modules/pytest/5.nix b/pkgs/development/python-modules/pytest/5.nix
index 1293cc94b0f13..341d5ac2240d5 100644
--- a/pkgs/development/python-modules/pytest/5.nix
+++ b/pkgs/development/python-modules/pytest/5.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytest/default.nix b/pkgs/development/python-modules/pytest/default.nix
index 6f5c99a99b190..798084d11117e 100644
--- a/pkgs/development/python-modules/pytest/default.nix
+++ b/pkgs/development/python-modules/pytest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
 , atomicwrites
 , attrs
 , funcsigs
diff --git a/pkgs/development/python-modules/pytestcache/default.nix b/pkgs/development/python-modules/pytestcache/default.nix
index 877e357d9469b..cf8643db06d19 100644
--- a/pkgs/development/python-modules/pytestcache/default.nix
+++ b/pkgs/development/python-modules/pytestcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, execnet }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytestrunner/default.nix b/pkgs/development/python-modules/pytestrunner/default.nix
index 7fd901babd0b0..d6203276b827f 100644
--- a/pkgs/development/python-modules/pytestrunner/default.nix
+++ b/pkgs/development/python-modules/pytestrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-runner";
diff --git a/pkgs/development/python-modules/python-doi/default.nix b/pkgs/development/python-modules/python-doi/default.nix
index 7e94f743da46e..e0cb03d611d1e 100644
--- a/pkgs/development/python-modules/python-doi/default.nix
+++ b/pkgs/development/python-modules/python-doi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy3k }:
+{ lib, buildPythonPackage, fetchFromGitHub, isPy3k }:
 
 buildPythonPackage rec {
   pname = "python-doi";
diff --git a/pkgs/development/python-modules/python-editor/default.nix b/pkgs/development/python-modules/python-editor/default.nix
index 19efcb89d3d38..212e191568c3d 100644
--- a/pkgs/development/python-modules/python-editor/default.nix
+++ b/pkgs/development/python-modules/python-editor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "1.0.4";
diff --git a/pkgs/development/python-modules/python-efl/default.nix b/pkgs/development/python-modules/python-efl/default.nix
index 44e35a186e215..293d97712808e 100644
--- a/pkgs/development/python-modules/python-efl/default.nix
+++ b/pkgs/development/python-modules/python-efl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , buildPythonPackage
 , pkg-config
diff --git a/pkgs/development/python-modules/python-etcd/default.nix b/pkgs/development/python-modules/python-etcd/default.nix
index f4305473797cd..f9b01802c4210 100644
--- a/pkgs/development/python-modules/python-etcd/default.nix
+++ b/pkgs/development/python-modules/python-etcd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/python-forecastio/default.nix b/pkgs/development/python-modules/python-forecastio/default.nix
index 392c5c2126d39..991ec3279decc 100644
--- a/pkgs/development/python-modules/python-forecastio/default.nix
+++ b/pkgs/development/python-modules/python-forecastio/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchPypi
+{ buildPythonPackage, lib, fetchPypi
 , requests
 , nose
 , responses
diff --git a/pkgs/development/python-modules/python-frontmatter/default.nix b/pkgs/development/python-modules/python-frontmatter/default.nix
index 661ea4ba2493e..6c6806f043ced 100644
--- a/pkgs/development/python-modules/python-frontmatter/default.nix
+++ b/pkgs/development/python-modules/python-frontmatter/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "python-frontmatter";
diff --git a/pkgs/development/python-modules/python-gitlab/default.nix b/pkgs/development/python-modules/python-gitlab/default.nix
index c706ff7903c3b..1a2e28d57aba9 100644
--- a/pkgs/development/python-modules/python-gitlab/default.nix
+++ b/pkgs/development/python-modules/python-gitlab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
+{ lib, buildPythonPackage, fetchPypi, requests, mock, httmock, pythonOlder, pytest, responses }:
 
 buildPythonPackage rec {
   pname = "python-gitlab";
diff --git a/pkgs/development/python-modules/python-gnupg/default.nix b/pkgs/development/python-modules/python-gnupg/default.nix
index 36ca3a7190613..fe68676110709 100644
--- a/pkgs/development/python-modules/python-gnupg/default.nix
+++ b/pkgs/development/python-modules/python-gnupg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, gnupg }:
+{ lib, buildPythonPackage, fetchPypi, gnupg }:
 
 buildPythonPackage rec {
   pname   = "python-gnupg";
diff --git a/pkgs/development/python-modules/python-hosts/default.nix b/pkgs/development/python-modules/python-hosts/default.nix
index 238b9b9e4afa9..c8f1179bc66bf 100644
--- a/pkgs/development/python-modules/python-hosts/default.nix
+++ b/pkgs/development/python-modules/python-hosts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "python-hosts";
diff --git a/pkgs/development/python-modules/python-jose/default.nix b/pkgs/development/python-modules/python-jose/default.nix
index 0de220094c064..15c6474cc3880 100644
--- a/pkgs/development/python-modules/python-jose/default.nix
+++ b/pkgs/development/python-modules/python-jose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , future, six, ecdsa, rsa
 , pycrypto, pytestcov, pytestrunner, cryptography
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/python-json-logger/default.nix b/pkgs/development/python-modules/python-json-logger/default.nix
index 96ce13ab265bc..cb36bf50e18bd 100644
--- a/pkgs/development/python-modules/python-json-logger/default.nix
+++ b/pkgs/development/python-modules/python-json-logger/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python-jsonrpc-server/default.nix b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
index 3a0ab33363ec6..53dab817eb275 100644
--- a/pkgs/development/python-modules/python-jsonrpc-server/default.nix
+++ b/pkgs/development/python-modules/python-jsonrpc-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , pytestCheckHook, mock, pytestcov, coverage
 , future, futures, ujson, isPy38
 }:
diff --git a/pkgs/development/python-modules/python-language-server/default.nix b/pkgs/development/python-modules/python-language-server/default.nix
index f22652d0f73ce..b30542dacbd6e 100644
--- a/pkgs/development/python-modules/python-language-server/default.nix
+++ b/pkgs/development/python-modules/python-language-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, isPy27
 , backports_functools_lru_cache, configparser, futures, future, jedi, pluggy, python-jsonrpc-server, flake8
 , pytestCheckHook, mock, pytestcov, coverage, setuptools, ujson, flaky
 , # Allow building a limited set of providers, e.g. ["pycodestyle"].
diff --git a/pkgs/development/python-modules/python-ldap-test/default.nix b/pkgs/development/python-modules/python-ldap-test/default.nix
index 94d8abd1fabd8..379aaa5ab6432 100644
--- a/pkgs/development/python-modules/python-ldap-test/default.nix
+++ b/pkgs/development/python-modules/python-ldap-test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, py4j }:
+{ lib, buildPythonPackage, fetchPypi, py4j }:
 
 buildPythonPackage rec {
   pname = "python-ldap-test";
diff --git a/pkgs/development/python-modules/python-levenshtein/default.nix b/pkgs/development/python-modules/python-levenshtein/default.nix
index 60767e77e7614..dda64a85fb26a 100644
--- a/pkgs/development/python-modules/python-levenshtein/default.nix
+++ b/pkgs/development/python-modules/python-levenshtein/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python-ly/default.nix b/pkgs/development/python-modules/python-ly/default.nix
index 6f83a7f61c75d..cc38553a81766 100644
--- a/pkgs/development/python-modules/python-ly/default.nix
+++ b/pkgs/development/python-modules/python-ly/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv }:
+{ buildPythonPackage, fetchPypi, lib }:
 
 buildPythonPackage rec {
   pname = "python-ly";
diff --git a/pkgs/development/python-modules/python-lzf/default.nix b/pkgs/development/python-modules/python-lzf/default.nix
index a1fd01134235c..61194ff8f9cbf 100644
--- a/pkgs/development/python-modules/python-lzf/default.nix
+++ b/pkgs/development/python-modules/python-lzf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   version = "0.2.4";
diff --git a/pkgs/development/python-modules/python-mapnik/default.nix b/pkgs/development/python-modules/python-mapnik/default.nix
index fe68ed60e372c..36c297358e87a 100644
--- a/pkgs/development/python-modules/python-mapnik/default.nix
+++ b/pkgs/development/python-modules/python-mapnik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , python
diff --git a/pkgs/development/python-modules/python-miio/default.nix b/pkgs/development/python-modules/python-miio/default.nix
index 8321795c2fbad..78c89408ac2da 100644
--- a/pkgs/development/python-modules/python-miio/default.nix
+++ b/pkgs/development/python-modules/python-miio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , appdirs
diff --git a/pkgs/development/python-modules/python-mnist/default.nix b/pkgs/development/python-modules/python-mnist/default.nix
index a24f2a383a316..131c0f2f5acba 100644
--- a/pkgs/development/python-modules/python-mnist/default.nix
+++ b/pkgs/development/python-modules/python-mnist/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "python-mnist";
diff --git a/pkgs/development/python-modules/python-nomad/default.nix b/pkgs/development/python-modules/python-nomad/default.nix
index ba3ecd3883a4d..4bb12ab7237cb 100644
--- a/pkgs/development/python-modules/python-nomad/default.nix
+++ b/pkgs/development/python-modules/python-nomad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests }:
+{ lib, buildPythonPackage, fetchPypi, requests }:
 
 buildPythonPackage rec {
   pname = "python-nomad";
diff --git a/pkgs/development/python-modules/python-otr/default.nix b/pkgs/development/python-modules/python-otr/default.nix
index 7a40998eebdc6..6b657dba78df3 100644
--- a/pkgs/development/python-modules/python-otr/default.nix
+++ b/pkgs/development/python-modules/python-otr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/python-packer/default.nix b/pkgs/development/python-modules/python-packer/default.nix
index ba02ec84635ff..2e2b59eb29d41 100644
--- a/pkgs/development/python-modules/python-packer/default.nix
+++ b/pkgs/development/python-modules/python-packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, sh }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, sh }:
 
 buildPythonPackage rec {
   pname = "python-packer";
diff --git a/pkgs/development/python-modules/python-pipedrive/default.nix b/pkgs/development/python-modules/python-pipedrive/default.nix
index 6e0c0ef5788e7..d776002b21296 100644
--- a/pkgs/development/python-modules/python-pipedrive/default.nix
+++ b/pkgs/development/python-modules/python-pipedrive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/python-ptrace/default.nix b/pkgs/development/python-modules/python-ptrace/default.nix
index 2d81581c0cc12..1af58300c2f0d 100644
--- a/pkgs/development/python-modules/python-ptrace/default.nix
+++ b/pkgs/development/python-modules/python-ptrace/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/python-rapidjson/default.nix b/pkgs/development/python-modules/python-rapidjson/default.nix
index c4cf0dc742557..4ef3b9f837907 100644
--- a/pkgs/development/python-modules/python-rapidjson/default.nix
+++ b/pkgs/development/python-modules/python-rapidjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/python-redis-lock/default.nix b/pkgs/development/python-modules/python-redis-lock/default.nix
index 235d085fffdbb..7a53e73b2b88f 100644
--- a/pkgs/development/python-modules/python-redis-lock/default.nix
+++ b/pkgs/development/python-modules/python-redis-lock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , redis
diff --git a/pkgs/development/python-modules/python-simple-hipchat/default.nix b/pkgs/development/python-modules/python-simple-hipchat/default.nix
index 8ec7f6887ad47..3162a03262886 100644
--- a/pkgs/development/python-modules/python-simple-hipchat/default.nix
+++ b/pkgs/development/python-modules/python-simple-hipchat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unzip }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-slugify/default.nix b/pkgs/development/python-modules/python-slugify/default.nix
index 1860ff6d24d56..fd488f4be9d35 100644
--- a/pkgs/development/python-modules/python-slugify/default.nix
+++ b/pkgs/development/python-modules/python-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, python, text-unidecode }:
+{ lib, fetchPypi, buildPythonPackage, python, text-unidecode }:
 
 buildPythonPackage rec {
     pname = "python-slugify";
diff --git a/pkgs/development/python-modules/python-socketio/default.nix b/pkgs/development/python-modules/python-socketio/default.nix
index ee9a603014440..e9c2ae146b09f 100644
--- a/pkgs/development/python-modules/python-socketio/default.nix
+++ b/pkgs/development/python-modules/python-socketio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , bidict
 , buildPythonPackage
 , fetchFromGitHub
diff --git a/pkgs/development/python-modules/python-telegram-bot/default.nix b/pkgs/development/python-modules/python-telegram-bot/default.nix
index 52dea24c45fec..b681fcf85a931 100644
--- a/pkgs/development/python-modules/python-telegram-bot/default.nix
+++ b/pkgs/development/python-modules/python-telegram-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , certifi
diff --git a/pkgs/development/python-modules/python-twitter/default.nix b/pkgs/development/python-modules/python-twitter/default.nix
index 4b1e7e2c1ebaa..c368d97633f4f 100644
--- a/pkgs/development/python-modules/python-twitter/default.nix
+++ b/pkgs/development/python-modules/python-twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
diff --git a/pkgs/development/python-modules/python-u2flib-host/default.nix b/pkgs/development/python-modules/python-u2flib-host/default.nix
index 7f6f14c9888c2..94f56698a3e7f 100644
--- a/pkgs/development/python-modules/python-u2flib-host/default.nix
+++ b/pkgs/development/python-modules/python-u2flib-host/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, requests, hidapi }:
+{ lib, fetchPypi, buildPythonPackage, requests, hidapi }:
 
 buildPythonPackage rec {
   pname = "python-u2flib-host";
diff --git a/pkgs/development/python-modules/python-uinput/default.nix b/pkgs/development/python-modules/python-uinput/default.nix
index 69f741e743797..8d82ffb6b3b9f 100644
--- a/pkgs/development/python-modules/python-uinput/default.nix
+++ b/pkgs/development/python-modules/python-uinput/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , udev }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python-unshare/default.nix b/pkgs/development/python-modules/python-unshare/default.nix
index fa82027777f64..f80721078dbb0 100644
--- a/pkgs/development/python-modules/python-unshare/default.nix
+++ b/pkgs/development/python-modules/python-unshare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/python-vipaccess/default.nix b/pkgs/development/python-modules/python-vipaccess/default.nix
index f96086393f2ea..8c3a5bf797d41 100644
--- a/pkgs/development/python-modules/python-vipaccess/default.nix
+++ b/pkgs/development/python-modules/python-vipaccess/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , oath
diff --git a/pkgs/development/python-modules/python-wifi/default.nix b/pkgs/development/python-modules/python-wifi/default.nix
index 503fbe101b922..7f6eee4906cb5 100644
--- a/pkgs/development/python-modules/python-wifi/default.nix
+++ b/pkgs/development/python-modules/python-wifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/python2-pythondialog/default.nix b/pkgs/development/python-modules/python2-pythondialog/default.nix
index b9d9b110f60c3..78378a738dba7 100644
--- a/pkgs/development/python-modules/python2-pythondialog/default.nix
+++ b/pkgs/development/python-modules/python2-pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/python3-openid/default.nix b/pkgs/development/python-modules/python3-openid/default.nix
index ad8ea88d1d0d5..769067f53fb0d 100644
--- a/pkgs/development/python-modules/python3-openid/default.nix
+++ b/pkgs/development/python-modules/python3-openid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
+{ lib, isPy3k, buildPythonPackage, fetchPypi, defusedxml }:
 
 buildPythonPackage rec {
   pname = "python3-openid";
diff --git a/pkgs/development/python-modules/python_fedora/default.nix b/pkgs/development/python-modules/python_fedora/default.nix
index df12d7aeaff6e..6a5c6a304f14e 100644
--- a/pkgs/development/python-modules/python_fedora/default.nix
+++ b/pkgs/development/python-modules/python_fedora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
+{ lib, buildPythonPackage, fetchPypi, kitchen, requests, bunch, paver
 , six, munch, urllib3, beautifulsoup4, openidc-client, lockfile }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/python_keyczar/default.nix b/pkgs/development/python-modules/python_keyczar/default.nix
index 5fff75ada911f..66cf28a15dde8 100644
--- a/pkgs/development/python-modules/python_keyczar/default.nix
+++ b/pkgs/development/python-modules/python_keyczar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyasn1
diff --git a/pkgs/development/python-modules/python_mimeparse/default.nix b/pkgs/development/python-modules/python_mimeparse/default.nix
index c3f85affe81b4..0f713bd21391c 100644
--- a/pkgs/development/python-modules/python_mimeparse/default.nix
+++ b/pkgs/development/python-modules/python_mimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/python_openzwave/default.nix b/pkgs/development/python-modules/python_openzwave/default.nix
index 2c5357297ea74..8f649d4d4d233 100644
--- a/pkgs/development/python-modules/python_openzwave/default.nix
+++ b/pkgs/development/python-modules/python_openzwave/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , pkg-config
 , systemd, libyaml, openzwave, cython, pyserial
 , six, pydispatcher, urwid }:
diff --git a/pkgs/development/python-modules/python_statsd/default.nix b/pkgs/development/python-modules/python_statsd/default.nix
index ae293c44c0f77..2aabaec2e14fd 100644
--- a/pkgs/development/python-modules/python_statsd/default.nix
+++ b/pkgs/development/python-modules/python_statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythondialog/default.nix b/pkgs/development/python-modules/pythondialog/default.nix
index c385f11b2f01c..6f8b6a2bbec36 100644
--- a/pkgs/development/python-modules/pythondialog/default.nix
+++ b/pkgs/development/python-modules/pythondialog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pythonirclib/default.nix b/pkgs/development/python-modules/pythonirclib/default.nix
index 178e1855a0616..54c84fe6ef597 100644
--- a/pkgs/development/python-modules/pythonirclib/default.nix
+++ b/pkgs/development/python-modules/pythonirclib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , paver
diff --git a/pkgs/development/python-modules/pythonix/default.nix b/pkgs/development/python-modules/pythonix/default.nix
index 80535b28bf239..9261ab2a8f23c 100644
--- a/pkgs/development/python-modules/pythonix/default.nix
+++ b/pkgs/development/python-modules/pythonix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, ninja, boost, meson, pkg-config, nix, isPy3k, python }:
 
 buildPythonPackage rec {
   pname = "pythonix";
diff --git a/pkgs/development/python-modules/pytimeparse/default.nix b/pkgs/development/python-modules/pytimeparse/default.nix
index 1ced64375301a..3bf0ad078c598 100644
--- a/pkgs/development/python-modules/pytimeparse/default.nix
+++ b/pkgs/development/python-modules/pytimeparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, nose }:
+{ lib, fetchPypi, buildPythonPackage, nose }:
 
 buildPythonPackage rec {
     pname = "pytimeparse";
diff --git a/pkgs/development/python-modules/pytoml/default.nix b/pkgs/development/python-modules/pytoml/default.nix
index 64e6ed4c669a2..b13dfd07dadc6 100644
--- a/pkgs/development/python-modules/pytoml/default.nix
+++ b/pkgs/development/python-modules/pytoml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , python
diff --git a/pkgs/development/python-modules/pytrends/default.nix b/pkgs/development/python-modules/pytrends/default.nix
index 83980c3d00b92..3ce1e70e82396 100644
--- a/pkgs/development/python-modules/pytrends/default.nix
+++ b/pkgs/development/python-modules/pytrends/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/pytricia/default.nix b/pkgs/development/python-modules/pytricia/default.nix
index 8e168bf8181a6..01c4ea014adca 100644
--- a/pkgs/development/python-modules/pytricia/default.nix
+++ b/pkgs/development/python-modules/pytricia/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytun/default.nix b/pkgs/development/python-modules/pytun/default.nix
index 2b49b169c6d1c..3437c0fbe7a56 100644
--- a/pkgs/development/python-modules/pytun/default.nix
+++ b/pkgs/development/python-modules/pytun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/pytzdata/default.nix b/pkgs/development/python-modules/pytzdata/default.nix
index 739325d333376..342bb088170db 100644
--- a/pkgs/development/python-modules/pytzdata/default.nix
+++ b/pkgs/development/python-modules/pytzdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "pytzdata";
diff --git a/pkgs/development/python-modules/pyunifi/default.nix b/pkgs/development/python-modules/pyunifi/default.nix
index 1eec6f3ea84db..dfbae696b8e55 100644
--- a/pkgs/development/python-modules/pyunifi/default.nix
+++ b/pkgs/development/python-modules/pyunifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyupdate/default.nix b/pkgs/development/python-modules/pyupdate/default.nix
index f33aba8d62561..cd0460dc7e194 100644
--- a/pkgs/development/python-modules/pyupdate/default.nix
+++ b/pkgs/development/python-modules/pyupdate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi, isPy3k
 , requests }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pyutil/default.nix b/pkgs/development/python-modules/pyutil/default.nix
index f1c0d3be8ccf2..dd1c7b2da5b03 100644
--- a/pkgs/development/python-modules/pyutil/default.nix
+++ b/pkgs/development/python-modules/pyutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/pyuv/default.nix b/pkgs/development/python-modules/pyuv/default.nix
index 95477196d8b94..0be0d61ed0db7 100644
--- a/pkgs/development/python-modules/pyuv/default.nix
+++ b/pkgs/development/python-modules/pyuv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPyPy
 , pkgs
diff --git a/pkgs/development/python-modules/pyvoro/default.nix b/pkgs/development/python-modules/pyvoro/default.nix
index 7013cc7809dd7..2fd5a96fa9333 100644
--- a/pkgs/development/python-modules/pyvoro/default.nix
+++ b/pkgs/development/python-modules/pyvoro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/pywatchman/default.nix b/pkgs/development/python-modules/pywatchman/default.nix
index 5e3c4d6cc5a04..a2cd2a6eed5ad 100644
--- a/pkgs/development/python-modules/pywatchman/default.nix
+++ b/pkgs/development/python-modules/pywatchman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, watchman }:
+{ lib, buildPythonPackage, fetchPypi, watchman }:
 
 buildPythonPackage rec {
   pname = "pywatchman";
diff --git a/pkgs/development/python-modules/pywebdav/default.nix b/pkgs/development/python-modules/pywebdav/default.nix
index 5ed3e28b5b1bc..2f6bb8553a4f6 100644
--- a/pkgs/development/python-modules/pywebdav/default.nix
+++ b/pkgs/development/python-modules/pywebdav/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "PyWebDAV";
diff --git a/pkgs/development/python-modules/pyx/default.nix b/pkgs/development/python-modules/pyx/default.nix
index b19e5f97e141b..d46bd718a3ab7 100644
--- a/pkgs/development/python-modules/pyx/default.nix
+++ b/pkgs/development/python-modules/pyx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/pyzufall/default.nix b/pkgs/development/python-modules/pyzufall/default.nix
index 03fce00629d8b..e0434e8e4dd47 100644
--- a/pkgs/development/python-modules/pyzufall/default.nix
+++ b/pkgs/development/python-modules/pyzufall/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
+{ lib, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
 
 buildPythonPackage rec {
   pname = "PyZufall";
diff --git a/pkgs/development/python-modules/qpid-python/default.nix b/pkgs/development/python-modules/qpid-python/default.nix
index ef540538792d6..24c90d072a2be 100644
--- a/pkgs/development/python-modules/qpid-python/default.nix
+++ b/pkgs/development/python-modules/qpid-python/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/qrcode/default.nix b/pkgs/development/python-modules/qrcode/default.nix
index 113d53ff29b88..29f2ab49606fd 100644
--- a/pkgs/development/python-modules/qrcode/default.nix
+++ b/pkgs/development/python-modules/qrcode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/qscintilla/default.nix b/pkgs/development/python-modules/qscintilla/default.nix
index 82c3773f30328..24719de779ebb 100644
--- a/pkgs/development/python-modules/qscintilla/default.nix
+++ b/pkgs/development/python-modules/qscintilla/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , disabledIf
 , isPy3k
diff --git a/pkgs/development/python-modules/qserve/default.nix b/pkgs/development/python-modules/qserve/default.nix
index ff606d132363f..0548b6fdf1761 100644
--- a/pkgs/development/python-modules/qserve/default.nix
+++ b/pkgs/development/python-modules/qserve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/qtawesome/default.nix b/pkgs/development/python-modules/qtawesome/default.nix
index 11b4885e4c8a2..4945bead42d4b 100644
--- a/pkgs/development/python-modules/qtawesome/default.nix
+++ b/pkgs/development/python-modules/qtawesome/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
+{ lib, buildPythonPackage, fetchPypi, qtpy, six, pyqt5, pytest }:
 
 buildPythonPackage rec {
   pname = "QtAwesome";
diff --git a/pkgs/development/python-modules/qtpy/default.nix b/pkgs/development/python-modules/qtpy/default.nix
index 76db7090a045a..17e1d9dbe83b7 100644
--- a/pkgs/development/python-modules/qtpy/default.nix
+++ b/pkgs/development/python-modules/qtpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyside, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pyside, pytest }:
 
 buildPythonPackage rec {
   pname = "QtPy";
diff --git a/pkgs/development/python-modules/querystring-parser/default.nix b/pkgs/development/python-modules/querystring-parser/default.nix
index 25b3c113cec6a..6288d196bb4e4 100644
--- a/pkgs/development/python-modules/querystring-parser/default.nix
+++ b/pkgs/development/python-modules/querystring-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, python, isPy27
+{ lib, buildPythonPackage, fetchPypi, python, isPy27
 , six
 }:
 
diff --git a/pkgs/development/python-modules/queuelib/default.nix b/pkgs/development/python-modules/queuelib/default.nix
index 7471ea180655f..3814663c04452 100644
--- a/pkgs/development/python-modules/queuelib/default.nix
+++ b/pkgs/development/python-modules/queuelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rabbitpy/default.nix b/pkgs/development/python-modules/rabbitpy/default.nix
index 79975ada50159..0de5d6de3bbae 100644
--- a/pkgs/development/python-modules/rabbitpy/default.nix
+++ b/pkgs/development/python-modules/rabbitpy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , mock
diff --git a/pkgs/development/python-modules/radicale_infcloud/default.nix b/pkgs/development/python-modules/radicale_infcloud/default.nix
index 5c561b6e65412..5d3540e019560 100644
--- a/pkgs/development/python-modules/radicale_infcloud/default.nix
+++ b/pkgs/development/python-modules/radicale_infcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage }:
+{ lib, fetchFromGitHub, buildPythonPackage }:
 
 buildPythonPackage {
   pname = "radicale_infcloud";
diff --git a/pkgs/development/python-modules/rainbowstream/default.nix b/pkgs/development/python-modules/rainbowstream/default.nix
index c5ec1d3ab4efa..e484c07f31cae 100644
--- a/pkgs/development/python-modules/rainbowstream/default.nix
+++ b/pkgs/development/python-modules/rainbowstream/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/ramlfications/default.nix b/pkgs/development/python-modules/ramlfications/default.nix
index 2d3e2bdc0e03a..c3ae88d1775c3 100644
--- a/pkgs/development/python-modules/ramlfications/default.nix
+++ b/pkgs/development/python-modules/ramlfications/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, pytest, pytest-mock, pytest-server-fixtures, pytest-localserver
 , termcolor, click, markdown2, six, jsonref, pyyaml, xmltodict, attrs
 }:
diff --git a/pkgs/development/python-modules/random2/default.nix b/pkgs/development/python-modules/random2/default.nix
index 9ed7701a3f458..6845a5707da7f 100644
--- a/pkgs/development/python-modules/random2/default.nix
+++ b/pkgs/development/python-modules/random2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/rarfile/default.nix b/pkgs/development/python-modules/rarfile/default.nix
index 22c34b82a5faf..545782d853eae 100644
--- a/pkgs/development/python-modules/rarfile/default.nix
+++ b/pkgs/development/python-modules/rarfile/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, nose, libarchive, glibcLocales, isPy27
 # unrar is non-free software
 , useUnrar ? false, unrar
 }:
diff --git a/pkgs/development/python-modules/ratelimiter/default.nix b/pkgs/development/python-modules/ratelimiter/default.nix
index 4d3ff6d486b4a..fc51e1488d6a8 100644
--- a/pkgs/development/python-modules/ratelimiter/default.nix
+++ b/pkgs/development/python-modules/ratelimiter/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv
+  lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rawkit/default.nix b/pkgs/development/python-modules/rawkit/default.nix
index 974f7ac4d1c63..0a96123db04cb 100644
--- a/pkgs/development/python-modules/rawkit/default.nix
+++ b/pkgs/development/python-modules/rawkit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, fetchpatch
+{ lib, fetchPypi, buildPythonPackage, fetchpatch
 , libraw
 , pytest, mock }:
 
diff --git a/pkgs/development/python-modules/rcssmin/default.nix b/pkgs/development/python-modules/rcssmin/default.nix
index 507102222fe0a..3de6f2038038a 100644
--- a/pkgs/development/python-modules/rcssmin/default.nix
+++ b/pkgs/development/python-modules/rcssmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rcssmin";
   version = "1.0.6";
diff --git a/pkgs/development/python-modules/readchar/default.nix b/pkgs/development/python-modules/readchar/default.nix
index 211f5d63a7dd3..ea13c7083fe76 100644
--- a/pkgs/development/python-modules/readchar/default.nix
+++ b/pkgs/development/python-modules/readchar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
+{ lib, buildPythonPackage, fetchFromGitHub, flake8, pytest, pytestcov, pexpect }:
 
 buildPythonPackage rec {
   pname = "readchar";
diff --git a/pkgs/development/python-modules/readme/default.nix b/pkgs/development/python-modules/readme/default.nix
index 044c487eb037c..95b45185a08c7 100644
--- a/pkgs/development/python-modules/readme/default.nix
+++ b/pkgs/development/python-modules/readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/rebulk/default.nix b/pkgs/development/python-modules/rebulk/default.nix
index 750efe357c228..8a4754e7a61d4 100644
--- a/pkgs/development/python-modules/rebulk/default.nix
+++ b/pkgs/development/python-modules/rebulk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
+{ lib, buildPythonPackage, fetchPypi, pytest, pytestrunner, six, regex}:
 
 buildPythonPackage rec {
   pname = "rebulk";
diff --git a/pkgs/development/python-modules/recaptcha_client/default.nix b/pkgs/development/python-modules/recaptcha_client/default.nix
index 08e7ff47aa1c3..dce24cfa7a8f9 100644
--- a/pkgs/development/python-modules/recaptcha_client/default.nix
+++ b/pkgs/development/python-modules/recaptcha_client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/reedsolo/default.nix b/pkgs/development/python-modules/reedsolo/default.nix
index c87a89b82a447..d9dd54e29f433 100644
--- a/pkgs/development/python-modules/reedsolo/default.nix
+++ b/pkgs/development/python-modules/reedsolo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, cython, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, cython, nose }:
 
 buildPythonPackage rec {
   pname = "reedsolo";
diff --git a/pkgs/development/python-modules/remotecv/default.nix b/pkgs/development/python-modules/remotecv/default.nix
index dc40763f6fe60..078e431f3baa6 100644
--- a/pkgs/development/python-modules/remotecv/default.nix
+++ b/pkgs/development/python-modules/remotecv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
+{ lib, buildPythonPackage, fetchFromGitHub, pillow, pyres, nose
 , preggy, numpy, yanc, nose-focus, mock, opencv }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rencode/default.nix b/pkgs/development/python-modules/rencode/default.nix
index a8f0f81ee71dd..a742c422ee904 100644
--- a/pkgs/development/python-modules/rencode/default.nix
+++ b/pkgs/development/python-modules/rencode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , cython
diff --git a/pkgs/development/python-modules/repeated_test/default.nix b/pkgs/development/python-modules/repeated_test/default.nix
index a9355cda41ca0..2c51238e19b54 100644
--- a/pkgs/development/python-modules/repeated_test/default.nix
+++ b/pkgs/development/python-modules/repeated_test/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/repocheck/default.nix b/pkgs/development/python-modules/repocheck/default.nix
index ad8c3aef2eac6..9d6c2c419216d 100644
--- a/pkgs/development/python-modules/repocheck/default.nix
+++ b/pkgs/development/python-modules/repocheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/repoze_lru/default.nix b/pkgs/development/python-modules/repoze_lru/default.nix
index 7b8f0ecd80912..e986f47e6e0da 100644
--- a/pkgs/development/python-modules/repoze_lru/default.nix
+++ b/pkgs/development/python-modules/repoze_lru/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
index 53761203113da..5d5e27a2e115d 100644
--- a/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
+++ b/pkgs/development/python-modules/repoze_sphinx_autointerface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/repoze_who/default.nix b/pkgs/development/python-modules/repoze_who/default.nix
index f64158f26a10a..1b33bb6954bf9 100644
--- a/pkgs/development/python-modules/repoze_who/default.nix
+++ b/pkgs/development/python-modules/repoze_who/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/requests-cache/default.nix b/pkgs/development/python-modules/requests-cache/default.nix
index 2b3d57831c8dd..d39fcc5f2a6e5 100644
--- a/pkgs/development/python-modules/requests-cache/default.nix
+++ b/pkgs/development/python-modules/requests-cache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , mock, requests, six, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/requests-http-signature/default.nix b/pkgs/development/python-modules/requests-http-signature/default.nix
index cd36a4528198f..225a8f149e473 100644
--- a/pkgs/development/python-modules/requests-http-signature/default.nix
+++ b/pkgs/development/python-modules/requests-http-signature/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/requests-kerberos/default.nix b/pkgs/development/python-modules/requests-kerberos/default.nix
index a1c6f4fb0a1bb..73272990e0f2c 100644
--- a/pkgs/development/python-modules/requests-kerberos/default.nix
+++ b/pkgs/development/python-modules/requests-kerberos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pykerberos, mock }:
 
 buildPythonPackage rec {
   pname = "requests-kerberos";
diff --git a/pkgs/development/python-modules/requests/default.nix b/pkgs/development/python-modules/requests/default.nix
index a49b07102201e..e0dfb9a24a643 100644
--- a/pkgs/development/python-modules/requests/default.nix
+++ b/pkgs/development/python-modules/requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , urllib3, idna, chardet, certifi
 , pytest }:
 
diff --git a/pkgs/development/python-modules/resampy/default.nix b/pkgs/development/python-modules/resampy/default.nix
index 38b4ae9911d25..551c7f5b93e62 100644
--- a/pkgs/development/python-modules/resampy/default.nix
+++ b/pkgs/development/python-modules/resampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pytest
diff --git a/pkgs/development/python-modules/rethinkdb/default.nix b/pkgs/development/python-modules/rethinkdb/default.nix
index b359002337362..947aa505f706e 100644
--- a/pkgs/development/python-modules/rethinkdb/default.nix
+++ b/pkgs/development/python-modules/rethinkdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/retry_decorator/default.nix b/pkgs/development/python-modules/retry_decorator/default.nix
index 12ba4f9a1a5b5..c2f91c8fe1b16 100644
--- a/pkgs/development/python-modules/retry_decorator/default.nix
+++ b/pkgs/development/python-modules/retry_decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/retrying/default.nix b/pkgs/development/python-modules/retrying/default.nix
index 65127d040f42e..5e2451affb905 100644
--- a/pkgs/development/python-modules/retrying/default.nix
+++ b/pkgs/development/python-modules/retrying/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/rfc-bibtex/default.nix b/pkgs/development/python-modules/rfc-bibtex/default.nix
index c002f0baaa9dc..b9b7cdb76c4f3 100644
--- a/pkgs/development/python-modules/rfc-bibtex/default.nix
+++ b/pkgs/development/python-modules/rfc-bibtex/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy3k }:
+{ lib, buildPythonApplication, fetchPypi, isPy3k }:
 
 buildPythonApplication rec {
   pname = "rfc-bibtex";
diff --git a/pkgs/development/python-modules/rfc3986/default.nix b/pkgs/development/python-modules/rfc3986/default.nix
index 561bda08d0cd1..93f2f2ce37d89 100644
--- a/pkgs/development/python-modules/rfc3986/default.nix
+++ b/pkgs/development/python-modules/rfc3986/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
+{ lib, buildPythonPackage, fetchPypi, idna, pytestCheckHook }:
 
 buildPythonPackage rec {
   pname = "rfc3986";
diff --git a/pkgs/development/python-modules/rfc3987/default.nix b/pkgs/development/python-modules/rfc3987/default.nix
index 1ec8fc2153c11..41beb1c8c17f5 100644
--- a/pkgs/development/python-modules/rfc3987/default.nix
+++ b/pkgs/development/python-modules/rfc3987/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "rfc3987";
diff --git a/pkgs/development/python-modules/rich/default.nix b/pkgs/development/python-modules/rich/default.nix
index d19f47281cdce..3c0810072c00a 100644
--- a/pkgs/development/python-modules/rich/default.nix
+++ b/pkgs/development/python-modules/rich/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
diff --git a/pkgs/development/python-modules/rjsmin/default.nix b/pkgs/development/python-modules/rjsmin/default.nix
index 7ca9d711739a2..d78c445a3e56a 100644
--- a/pkgs/development/python-modules/rjsmin/default.nix
+++ b/pkgs/development/python-modules/rjsmin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "rjsmin";
   version = "1.1.0";
diff --git a/pkgs/development/python-modules/rl-coach/default.nix b/pkgs/development/python-modules/rl-coach/default.nix
index 0ac5d9ab2a3b0..0724abec19a9b 100644
--- a/pkgs/development/python-modules/rl-coach/default.nix
+++ b/pkgs/development/python-modules/rl-coach/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pythonOlder
 , fetchPypi
diff --git a/pkgs/development/python-modules/robomachine/default.nix b/pkgs/development/python-modules/robomachine/default.nix
index fe069be459cc2..4f5d44006c440 100644
--- a/pkgs/development/python-modules/robomachine/default.nix
+++ b/pkgs/development/python-modules/robomachine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
+{ lib, fetchPypi, buildPythonPackage, pyparsing, robotframework, allpairspy }:
 
 buildPythonPackage rec {
   pname = "RoboMachine";
diff --git a/pkgs/development/python-modules/robot-detection/default.nix b/pkgs/development/python-modules/robot-detection/default.nix
index 3cf064d2669db..31b1f43a4e24f 100644
--- a/pkgs/development/python-modules/robot-detection/default.nix
+++ b/pkgs/development/python-modules/robot-detection/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six }:
+{ lib, buildPythonPackage, fetchPypi, six }:
 
 buildPythonPackage rec {
   pname = "robot-detection";
diff --git a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
index c3eb309dfe0ba..8dfbb32fe08d9 100644
--- a/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-databaselibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-requests/default.nix b/pkgs/development/python-modules/robotframework-requests/default.nix
index 967138620e98d..f23979f21fd10 100644
--- a/pkgs/development/python-modules/robotframework-requests/default.nix
+++ b/pkgs/development/python-modules/robotframework-requests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/robotframework-ride/default.nix b/pkgs/development/python-modules/robotframework-ride/default.nix
index 39e42596e2aea..bc9e0873fe548 100644
--- a/pkgs/development/python-modules/robotframework-ride/default.nix
+++ b/pkgs/development/python-modules/robotframework-ride/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
+{ lib, fetchurl, buildPythonPackage, isPy3k, pygments, wxPython }:
 
 buildPythonPackage rec {
   version = "1.2.3";
diff --git a/pkgs/development/python-modules/robotframework-selenium2library/default.nix b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
index 5fa87d17d11f3..6d079a99b4f1d 100644
--- a/pkgs/development/python-modules/robotframework-selenium2library/default.nix
+++ b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
+{ lib, buildPythonPackage, fetchPypi, robotframework-seleniumlibrary }:
 
 buildPythonPackage rec {
   version = "3.0.0";
diff --git a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
index 60123d6b87d16..fbb8cb034a51d 100644
--- a/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-seleniumlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework, selenium, mockito, robotstatuschecker, approvaltests }:
 
 buildPythonPackage rec {
   version = "3.3.1";
diff --git a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
index 7e3bcbcc55dac..62fb43e026915 100644
--- a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , robotframework
diff --git a/pkgs/development/python-modules/robotframework-tools/default.nix b/pkgs/development/python-modules/robotframework-tools/default.nix
index 5bc7bbceae71e..9b90b25bfb72f 100644
--- a/pkgs/development/python-modules/robotframework-tools/default.nix
+++ b/pkgs/development/python-modules/robotframework-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/robotframework/default.nix b/pkgs/development/python-modules/robotframework/default.nix
index 953602ca1ada0..cc57fa0d0264e 100644
--- a/pkgs/development/python-modules/robotframework/default.nix
+++ b/pkgs/development/python-modules/robotframework/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
   pname = "robotframework";
diff --git a/pkgs/development/python-modules/robotstatuschecker/default.nix b/pkgs/development/python-modules/robotstatuschecker/default.nix
index b0bd44f9c1521..81226a23452e5 100644
--- a/pkgs/development/python-modules/robotstatuschecker/default.nix
+++ b/pkgs/development/python-modules/robotstatuschecker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, robotframework }:
+{ lib, buildPythonPackage, fetchFromGitHub, python, robotframework }:
 
 buildPythonPackage rec {
   version = "1.3";
diff --git a/pkgs/development/python-modules/robotsuite/default.nix b/pkgs/development/python-modules/robotsuite/default.nix
index 126153ec50e54..5c46686adae4f 100644
--- a/pkgs/development/python-modules/robotsuite/default.nix
+++ b/pkgs/development/python-modules/robotsuite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , unittest2, lxml, robotframework
 }:
 
diff --git a/pkgs/development/python-modules/roku/default.nix b/pkgs/development/python-modules/roku/default.nix
index 5e3644468fe8e..c82eda6e35c06 100644
--- a/pkgs/development/python-modules/roku/default.nix
+++ b/pkgs/development/python-modules/roku/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
+{ lib, fetchFromGitHub, buildPythonPackage, requests, pytest, flask, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/roman/default.nix b/pkgs/development/python-modules/roman/default.nix
index 33f0f7f18d7d2..cde0ab0f271b6 100644
--- a/pkgs/development/python-modules/roman/default.nix
+++ b/pkgs/development/python-modules/roman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rope/default.nix b/pkgs/development/python-modules/rope/default.nix
index 65edd602d8dea..c4e451aade5ef 100644
--- a/pkgs/development/python-modules/rope/default.nix
+++ b/pkgs/development/python-modules/rope/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, nose }:
 
 buildPythonPackage rec {
   pname = "rope";
diff --git a/pkgs/development/python-modules/ropper/default.nix b/pkgs/development/python-modules/ropper/default.nix
index 8b193caa7b8bb..5a472ceb18018 100644
--- a/pkgs/development/python-modules/ropper/default.nix
+++ b/pkgs/development/python-modules/ropper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , capstone
diff --git a/pkgs/development/python-modules/routes/default.nix b/pkgs/development/python-modules/routes/default.nix
index 0129ef69e2c6e..1176fcb4eb093 100644
--- a/pkgs/development/python-modules/routes/default.nix
+++ b/pkgs/development/python-modules/routes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repoze_lru
diff --git a/pkgs/development/python-modules/rpdb/default.nix b/pkgs/development/python-modules/rpdb/default.nix
index fb84adb7d2402..69a886f6e0da2 100644
--- a/pkgs/development/python-modules/rpdb/default.nix
+++ b/pkgs/development/python-modules/rpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/rpkg/default.nix b/pkgs/development/python-modules/rpkg/default.nix
index 731a5738e73ec..5f1cfc622c9fd 100644
--- a/pkgs/development/python-modules/rpkg/default.nix
+++ b/pkgs/development/python-modules/rpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
+{ lib, buildPythonPackage, isPy3k, fetchurl, six, pycurl, cccolutils
 , koji, rpmfluff }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/rply/default.nix b/pkgs/development/python-modules/rply/default.nix
index 0da9d2b71018f..33f8547496dbd 100644
--- a/pkgs/development/python-modules/rply/default.nix
+++ b/pkgs/development/python-modules/rply/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
+{ lib, pytest, fetchFromGitHub, buildPythonPackage, appdirs }:
 
 buildPythonPackage rec {
   pname = "rply";
diff --git a/pkgs/development/python-modules/rpmfluff/default.nix b/pkgs/development/python-modules/rpmfluff/default.nix
index 96050ba14b01a..9957393770b35 100644
--- a/pkgs/development/python-modules/rpmfluff/default.nix
+++ b/pkgs/development/python-modules/rpmfluff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , glibcLocales
diff --git a/pkgs/development/python-modules/rq/default.nix b/pkgs/development/python-modules/rq/default.nix
index c9ca5977cb108..8ec05aae9d52f 100644
--- a/pkgs/development/python-modules/rq/default.nix
+++ b/pkgs/development/python-modules/rq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
+{ lib, fetchFromGitHub, buildPythonPackage, isPy27, click, redis }:
 
 buildPythonPackage rec {
   pname = "rq";
diff --git a/pkgs/development/python-modules/rsa/4_0.nix b/pkgs/development/python-modules/rsa/4_0.nix
index 8400647aaad60..1a9ad2171a075 100644
--- a/pkgs/development/python-modules/rsa/4_0.nix
+++ b/pkgs/development/python-modules/rsa/4_0.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rsa/default.nix b/pkgs/development/python-modules/rsa/default.nix
index b688369beb567..7a990061e00ef 100644
--- a/pkgs/development/python-modules/rsa/default.nix
+++ b/pkgs/development/python-modules/rsa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , unittest2
diff --git a/pkgs/development/python-modules/rtslib/default.nix b/pkgs/development/python-modules/rtslib/default.nix
index e53756b0181a2..e6289378c9679 100644
--- a/pkgs/development/python-modules/rtslib/default.nix
+++ b/pkgs/development/python-modules/rtslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
+{ lib, fetchFromGitHub, buildPythonPackage, six, pyudev, pygobject3 }:
 
 buildPythonPackage rec {
   pname = "rtslib";
diff --git a/pkgs/development/python-modules/ruamel_base/default.nix b/pkgs/development/python-modules/ruamel_base/default.nix
index 950f523f4a9a7..1f829bb4e0ba8 100644
--- a/pkgs/development/python-modules/ruamel_base/default.nix
+++ b/pkgs/development/python-modules/ruamel_base/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ruamel_ordereddict/default.nix b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
index 1e5820a37f734..98c36221dcd55 100644
--- a/pkgs/development/python-modules/ruamel_ordereddict/default.nix
+++ b/pkgs/development/python-modules/ruamel_ordereddict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
index debf2aaf7747c..8304f5d7dadc3 100644
--- a/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
+++ b/pkgs/development/python-modules/ruamel_yaml_clib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , ruamel_base
diff --git a/pkgs/development/python-modules/rubymarshal/default.nix b/pkgs/development/python-modules/rubymarshal/default.nix
index edb793c19d515..51cec6f860253 100644
--- a/pkgs/development/python-modules/rubymarshal/default.nix
+++ b/pkgs/development/python-modules/rubymarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
+{ lib, buildPythonPackage, fetchPypi, hypothesis, isPy3k }:
 
 buildPythonPackage rec {
   pname = "rubymarshal";
diff --git a/pkgs/development/python-modules/runsnakerun/default.nix b/pkgs/development/python-modules/runsnakerun/default.nix
index 1475b00323138..ace9b8269c538 100644
--- a/pkgs/development/python-modules/runsnakerun/default.nix
+++ b/pkgs/development/python-modules/runsnakerun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , squaremap
diff --git a/pkgs/development/python-modules/s3fs/default.nix b/pkgs/development/python-modules/s3fs/default.nix
index 0154059c4f7be..9bb2a513174cf 100644
--- a/pkgs/development/python-modules/s3fs/default.nix
+++ b/pkgs/development/python-modules/s3fs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
+{ lib, buildPythonPackage, fetchPypi, docutils, aiobotocore, fsspec }:
 
 buildPythonPackage rec {
   pname = "s3fs";
diff --git a/pkgs/development/python-modules/sacremoses/default.nix b/pkgs/development/python-modules/sacremoses/default.nix
index 9f97757edad46..4ffea014001b2 100644
--- a/pkgs/development/python-modules/sacremoses/default.nix
+++ b/pkgs/development/python-modules/sacremoses/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , click
 , six
diff --git a/pkgs/development/python-modules/safe/default.nix b/pkgs/development/python-modules/safe/default.nix
index d167760c3e0ef..6a4515b90f83c 100644
--- a/pkgs/development/python-modules/safe/default.nix
+++ b/pkgs/development/python-modules/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/salmon-mail/default.nix b/pkgs/development/python-modules/salmon-mail/default.nix
index 5e6aa5927eca1..0b8edf8bdd903 100644
--- a/pkgs/development/python-modules/salmon-mail/default.nix
+++ b/pkgs/development/python-modules/salmon-mail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
+{ lib, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
 , python-daemon, six, jinja2, mock, click }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/samplerate/default.nix b/pkgs/development/python-modules/samplerate/default.nix
index a4a19f7ad12ec..9c26c9e2e2b30 100644
--- a/pkgs/development/python-modules/samplerate/default.nix
+++ b/pkgs/development/python-modules/samplerate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , numpy
 , pkgs
diff --git a/pkgs/development/python-modules/sandboxlib/default.nix b/pkgs/development/python-modules/sandboxlib/default.nix
index 42872e3189162..1be4c485b800d 100644
--- a/pkgs/development/python-modules/sandboxlib/default.nix
+++ b/pkgs/development/python-modules/sandboxlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/sapi-python-client/default.nix b/pkgs/development/python-modules/sapi-python-client/default.nix
index 8a7a62d8ce849..222b4c60c7f20 100644
--- a/pkgs/development/python-modules/sapi-python-client/default.nix
+++ b/pkgs/development/python-modules/sapi-python-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
+{ lib, git, setuptools, setuptools_scm, fetchFromGitHub, requests, boto3, buildPythonPackage, responses }:
 
 buildPythonPackage rec {
     pname = "sapi-python-client";
diff --git a/pkgs/development/python-modules/scales/default.nix b/pkgs/development/python-modules/scales/default.nix
index 5aae629726880..3806ffb9d46b8 100644
--- a/pkgs/development/python-modules/scales/default.nix
+++ b/pkgs/development/python-modules/scales/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/schedule/default.nix b/pkgs/development/python-modules/schedule/default.nix
index 596ed993233e8..2eda0cd6ac985 100644
--- a/pkgs/development/python-modules/schedule/default.nix
+++ b/pkgs/development/python-modules/schedule/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , mock
diff --git a/pkgs/development/python-modules/schema/default.nix b/pkgs/development/python-modules/schema/default.nix
index 1502c7d10abec..483a891f9332c 100644
--- a/pkgs/development/python-modules/schema/default.nix
+++ b/pkgs/development/python-modules/schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
+{ lib, buildPythonPackage, fetchPypi, contextlib2, pytest, mock }:
 
 buildPythonPackage rec {
 
diff --git a/pkgs/development/python-modules/scikit-bio/default.nix b/pkgs/development/python-modules/scikit-bio/default.nix
index 8fa0186498f49..f14c4d82f4281 100644
--- a/pkgs/development/python-modules/scikit-bio/default.nix
+++ b/pkgs/development/python-modules/scikit-bio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/scikits-odes/default.nix b/pkgs/development/python-modules/scikits-odes/default.nix
index 383cf1f70c686..8921e0061aa6f 100644
--- a/pkgs/development/python-modules/scikits-odes/default.nix
+++ b/pkgs/development/python-modules/scikits-odes/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchurl
diff --git a/pkgs/development/python-modules/scp/default.nix b/pkgs/development/python-modules/scp/default.nix
index f5cd96e71aaf6..abbe932c26706 100644
--- a/pkgs/development/python-modules/scp/default.nix
+++ b/pkgs/development/python-modules/scp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paramiko
diff --git a/pkgs/development/python-modules/scrapy-deltafetch/default.nix b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
index 900943a0e1536..006c8ed030231 100644
--- a/pkgs/development/python-modules/scrapy-deltafetch/default.nix
+++ b/pkgs/development/python-modules/scrapy-deltafetch/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, bsddb3 }:
 
 buildPythonPackage rec {
   pname = "scrapy-deltafetch";
diff --git a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
index 4f6eecfe91436..f9f896a563b7e 100644
--- a/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
+++ b/pkgs/development/python-modules/scrapy-fake-useragent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytestCheckHook, pytestcov, pytest-mock, fake-useragent, faker, scrapy }:
 
 buildPythonPackage rec {
   pname = "scrapy-fake-useragent";
diff --git a/pkgs/development/python-modules/scrapy-splash/default.nix b/pkgs/development/python-modules/scrapy-splash/default.nix
index ab00377f4a0eb..5f6721f8162c0 100644
--- a/pkgs/development/python-modules/scrapy-splash/default.nix
+++ b/pkgs/development/python-modules/scrapy-splash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, scrapy, six }:
+{ lib, fetchPypi, buildPythonPackage, scrapy, six }:
 
 buildPythonPackage rec {
   pname = "scrapy-splash";
diff --git a/pkgs/development/python-modules/screeninfo/default.nix b/pkgs/development/python-modules/screeninfo/default.nix
index f71f8d0c263a1..5f238a7e05fa3 100644
--- a/pkgs/development/python-modules/screeninfo/default.nix
+++ b/pkgs/development/python-modules/screeninfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
+{ lib, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
 
 buildPythonApplication rec {
   pname = "screeninfo";
diff --git a/pkgs/development/python-modules/scripttest/default.nix b/pkgs/development/python-modules/scripttest/default.nix
index ab234ce224343..5fe4b2b2ee6f1 100644
--- a/pkgs/development/python-modules/scripttest/default.nix
+++ b/pkgs/development/python-modules/scripttest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sdnotify/default.nix b/pkgs/development/python-modules/sdnotify/default.nix
index 0003d9c013123..a447283c63ab0 100644
--- a/pkgs/development/python-modules/sdnotify/default.nix
+++ b/pkgs/development/python-modules/sdnotify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/seabreeze/default.nix b/pkgs/development/python-modules/seabreeze/default.nix
index cc9594d045258..f4a4955a7392b 100644
--- a/pkgs/development/python-modules/seabreeze/default.nix
+++ b/pkgs/development/python-modules/seabreeze/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pyusb
diff --git a/pkgs/development/python-modules/seekpath/default.nix b/pkgs/development/python-modules/seekpath/default.nix
index 637b55eec8d7f..dbfe451077691 100644
--- a/pkgs/development/python-modules/seekpath/default.nix
+++ b/pkgs/development/python-modules/seekpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, numpy, future, spglib, glibcLocales, pytest, scipy }:
 
 buildPythonPackage rec {
   pname = "seekpath";
diff --git a/pkgs/development/python-modules/selectors2/default.nix b/pkgs/development/python-modules/selectors2/default.nix
index ff6b81d3105d2..bd3f77b5b08ab 100644
--- a/pkgs/development/python-modules/selectors2/default.nix
+++ b/pkgs/development/python-modules/selectors2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, psutil, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/selectors34/default.nix b/pkgs/development/python-modules/selectors34/default.nix
index ea3b403fdaed6..2209ccf43d26b 100644
--- a/pkgs/development/python-modules/selectors34/default.nix
+++ b/pkgs/development/python-modules/selectors34/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/semantic/default.nix b/pkgs/development/python-modules/semantic/default.nix
index 83e4879e1fddd..518b7637ad71d 100644
--- a/pkgs/development/python-modules/semantic/default.nix
+++ b/pkgs/development/python-modules/semantic/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/semver/default.nix b/pkgs/development/python-modules/semver/default.nix
index 71ec776db7c42..c281a6d6b0da6 100644
--- a/pkgs/development/python-modules/semver/default.nix
+++ b/pkgs/development/python-modules/semver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/sentencepiece/default.nix b/pkgs/development/python-modules/sentencepiece/default.nix
index dd324260f8360..c1ad64b3f5e4f 100644
--- a/pkgs/development/python-modules/sentencepiece/default.nix
+++ b/pkgs/development/python-modules/sentencepiece/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, stdenv
+
 , sentencepiece
 , pkg-config
 }:
diff --git a/pkgs/development/python-modules/sentry-sdk/default.nix b/pkgs/development/python-modules/sentry-sdk/default.nix
index ea9bbc1f0c3fe..b3a1c4ee2f4ce 100644
--- a/pkgs/development/python-modules/sentry-sdk/default.nix
+++ b/pkgs/development/python-modules/sentry-sdk/default.nix
@@ -17,7 +17,7 @@
 , rq
 , sanic
 , sqlalchemy
-, lib, stdenv
+, lib
 , tornado
 , urllib3
 , trytond
diff --git a/pkgs/development/python-modules/sepaxml/default.nix b/pkgs/development/python-modules/sepaxml/default.nix
index 095b47db2bff4..8f6d4eb94f582 100644
--- a/pkgs/development/python-modules/sepaxml/default.nix
+++ b/pkgs/development/python-modules/sepaxml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , lxml
 , pytest
 , text-unidecode
diff --git a/pkgs/development/python-modules/seqdiag/default.nix b/pkgs/development/python-modules/seqdiag/default.nix
index ba4cdca0c6361..2ae9defc504e6 100644
--- a/pkgs/development/python-modules/seqdiag/default.nix
+++ b/pkgs/development/python-modules/seqdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
+{ lib, fetchurl, buildPythonPackage, isPy27, pep8, nose, unittest2, docutils
 , blockdiag
 }:
 
diff --git a/pkgs/development/python-modules/serpent/default.nix b/pkgs/development/python-modules/serpent/default.nix
index 36840813b4012..50f6e0b63a639 100644
--- a/pkgs/development/python-modules/serpent/default.nix
+++ b/pkgs/development/python-modules/serpent/default.nix
@@ -1,7 +1,6 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , isPy27
 , enum34
diff --git a/pkgs/development/python-modules/serversyncstorage/default.nix b/pkgs/development/python-modules/serversyncstorage/default.nix
index fa212d6a4de5b..a409d48837e64 100644
--- a/pkgs/development/python-modules/serversyncstorage/default.nix
+++ b/pkgs/development/python-modules/serversyncstorage/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/setproctitle/default.nix b/pkgs/development/python-modules/setproctitle/default.nix
index a9c0e7fda893b..9338166efefe4 100644
--- a/pkgs/development/python-modules/setproctitle/default.nix
+++ b/pkgs/development/python-modules/setproctitle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/setuptools-git/default.nix b/pkgs/development/python-modules/setuptools-git/default.nix
index 18fae7b1610bb..06e699e19a31d 100644
--- a/pkgs/development/python-modules/setuptools-git/default.nix
+++ b/pkgs/development/python-modules/setuptools-git/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/setuptools-lint/default.nix b/pkgs/development/python-modules/setuptools-lint/default.nix
index ba42c21ad3603..f1eb2903f03ee 100644
--- a/pkgs/development/python-modules/setuptools-lint/default.nix
+++ b/pkgs/development/python-modules/setuptools-lint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pylint }:
+{ lib, buildPythonPackage, fetchPypi, pylint }:
 
 buildPythonPackage rec {
   pname = "setuptools-lint";
diff --git a/pkgs/development/python-modules/setuptools-rust/default.nix b/pkgs/development/python-modules/setuptools-rust/default.nix
index 2d9a4b17d40fa..ee4a3b551649c 100644
--- a/pkgs/development/python-modules/setuptools-rust/default.nix
+++ b/pkgs/development/python-modules/setuptools-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
index d8558aaf83a72..98795eadfd4d9 100644
--- a/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
+++ b/pkgs/development/python-modules/setuptools-scm-git-archive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
+{ lib, buildPythonPackage, fetchPypi, setuptools_scm, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools-scm-git-archive";
diff --git a/pkgs/development/python-modules/setuptools_scm/default.nix b/pkgs/development/python-modules/setuptools_scm/default.nix
index a766bb6c294fa..ba716c313fd56 100644
--- a/pkgs/development/python-modules/setuptools_scm/default.nix
+++ b/pkgs/development/python-modules/setuptools_scm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pip, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pip, pytest }:
 
 buildPythonPackage rec {
   pname = "setuptools_scm";
diff --git a/pkgs/development/python-modules/setuptoolsdarcs/default.nix b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
index f6358a831c9c3..41fe5043ea852 100644
--- a/pkgs/development/python-modules/setuptoolsdarcs/default.nix
+++ b/pkgs/development/python-modules/setuptoolsdarcs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , darcsver
diff --git a/pkgs/development/python-modules/setuptoolstrial/default.nix b/pkgs/development/python-modules/setuptoolstrial/default.nix
index 1d29f77cf0f25..bef492e5dbcb0 100644
--- a/pkgs/development/python-modules/setuptoolstrial/default.nix
+++ b/pkgs/development/python-modules/setuptoolstrial/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/sexpdata/default.nix b/pkgs/development/python-modules/sexpdata/default.nix
index 89f716d9be254..fd7d99fbb3fc5 100644
--- a/pkgs/development/python-modules/sexpdata/default.nix
+++ b/pkgs/development/python-modules/sexpdata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sgmllib3k/default.nix b/pkgs/development/python-modules/sgmllib3k/default.nix
index 6884bed274832..1104c843c6eeb 100644
--- a/pkgs/development/python-modules/sgmllib3k/default.nix
+++ b/pkgs/development/python-modules/sgmllib3k/default.nix
@@ -1,8 +1,7 @@
-{ stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
-, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shap/default.nix b/pkgs/development/python-modules/shap/default.nix
index 1ce9a879ee19d..cfbd6f92b04c3 100644
--- a/pkgs/development/python-modules/shap/default.nix
+++ b/pkgs/development/python-modules/shap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/shellingham/default.nix b/pkgs/development/python-modules/shellingham/default.nix
index 77a4b98f54c30..300368b31f130 100644
--- a/pkgs/development/python-modules/shellingham/default.nix
+++ b/pkgs/development/python-modules/shellingham/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/shippai/default.nix b/pkgs/development/python-modules/shippai/default.nix
index 8fd15b71a0158..e7efb1ef2dc6d 100644
--- a/pkgs/development/python-modules/shippai/default.nix
+++ b/pkgs/development/python-modules/shippai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "shippai";
diff --git a/pkgs/development/python-modules/shortuuid/default.nix b/pkgs/development/python-modules/shortuuid/default.nix
index 35401afa6e3ee..f1c1efbc0ec21 100644
--- a/pkgs/development/python-modules/shortuuid/default.nix
+++ b/pkgs/development/python-modules/shortuuid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/should-dsl/default.nix b/pkgs/development/python-modules/should-dsl/default.nix
index 1499f1ce4bc8b..7510ba88d1d52 100644
--- a/pkgs/development/python-modules/should-dsl/default.nix
+++ b/pkgs/development/python-modules/should-dsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "should-dsl";
diff --git a/pkgs/development/python-modules/shouldbe/default.nix b/pkgs/development/python-modules/shouldbe/default.nix
index 9959f26036cfb..b733c1c95162c 100644
--- a/pkgs/development/python-modules/shouldbe/default.nix
+++ b/pkgs/development/python-modules/shouldbe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonAtLeast
 , fetchPypi
diff --git a/pkgs/development/python-modules/signedjson/default.nix b/pkgs/development/python-modules/signedjson/default.nix
index 12614a3446bbd..2f47113408e82 100644
--- a/pkgs/development/python-modules/signedjson/default.nix
+++ b/pkgs/development/python-modules/signedjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , canonicaljson
diff --git a/pkgs/development/python-modules/sigtools/default.nix b/pkgs/development/python-modules/sigtools/default.nix
index 0c11a2b6c5613..1d81ba5180cf7 100644
--- a/pkgs/development/python-modules/sigtools/default.nix
+++ b/pkgs/development/python-modules/sigtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , repeated_test
diff --git a/pkgs/development/python-modules/simanneal/default.nix b/pkgs/development/python-modules/simanneal/default.nix
index 958f53be567d5..2d29797b28f9e 100644
--- a/pkgs/development/python-modules/simanneal/default.nix
+++ b/pkgs/development/python-modules/simanneal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonPackage, pytest }:
+{ lib, fetchFromGitHub, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "simanneal";
diff --git a/pkgs/development/python-modules/simple-websocket-server/default.nix b/pkgs/development/python-modules/simple-websocket-server/default.nix
index f8d579b6088de..7228e6d9f3e90 100644
--- a/pkgs/development/python-modules/simple-websocket-server/default.nix
+++ b/pkgs/development/python-modules/simple-websocket-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage {
   pname = "simple-websocket-server";
diff --git a/pkgs/development/python-modules/simpleai/default.nix b/pkgs/development/python-modules/simpleai/default.nix
index 0786ebfae6e4a..2ad7fe9ba28d1 100644
--- a/pkgs/development/python-modules/simpleai/default.nix
+++ b/pkgs/development/python-modules/simpleai/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/simplebayes/default.nix b/pkgs/development/python-modules/simplebayes/default.nix
index ed86b48fc0725..06fe8e236b370 100644
--- a/pkgs/development/python-modules/simplebayes/default.nix
+++ b/pkgs/development/python-modules/simplebayes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , nose
diff --git a/pkgs/development/python-modules/simpleparse/default.nix b/pkgs/development/python-modules/simpleparse/default.nix
index 6395f4af223d5..e81a7d41b7a5e 100644
--- a/pkgs/development/python-modules/simpleparse/default.nix
+++ b/pkgs/development/python-modules/simpleparse/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/skein/default.nix b/pkgs/development/python-modules/skein/default.nix
index 40a179264273e..ad7cc02143937 100644
--- a/pkgs/development/python-modules/skein/default.nix
+++ b/pkgs/development/python-modules/skein/default.nix
@@ -5,7 +5,7 @@
 , jre
 , lib
 , pythonPackages
-, stdenv
+
 }:
 
 let
diff --git a/pkgs/development/python-modules/sklearn-deap/default.nix b/pkgs/development/python-modules/sklearn-deap/default.nix
index 36ec8b18ca7ee..958fc613f6f31 100644
--- a/pkgs/development/python-modules/sklearn-deap/default.nix
+++ b/pkgs/development/python-modules/sklearn-deap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
+{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, numpy, scipy, deap, scikitlearn, python }:
 
 buildPythonPackage rec {
   pname = "sklearn-deap";
diff --git a/pkgs/development/python-modules/slackclient/default.nix b/pkgs/development/python-modules/slackclient/default.nix
index 571398b783dc5..a690788095e62 100644
--- a/pkgs/development/python-modules/slackclient/default.nix
+++ b/pkgs/development/python-modules/slackclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , aiohttp
diff --git a/pkgs/development/python-modules/sleekxmpp/default.nix b/pkgs/development/python-modules/sleekxmpp/default.nix
index e6d5e59a80e7b..07be197f276c6 100644
--- a/pkgs/development/python-modules/sleekxmpp/default.nix
+++ b/pkgs/development/python-modules/sleekxmpp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, dns, pyasn1 }:
+{ lib, fetchPypi, buildPythonPackage, dns, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "sleekxmpp";
diff --git a/pkgs/development/python-modules/slicer/default.nix b/pkgs/development/python-modules/slicer/default.nix
index b5521f415d7b8..83f3e412ddcf5 100644
--- a/pkgs/development/python-modules/slicer/default.nix
+++ b/pkgs/development/python-modules/slicer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/slicerator/default.nix b/pkgs/development/python-modules/slicerator/default.nix
index 396692200039e..191159a648ec0 100644
--- a/pkgs/development/python-modules/slicerator/default.nix
+++ b/pkgs/development/python-modules/slicerator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/slob/default.nix b/pkgs/development/python-modules/slob/default.nix
index a7520c62a62c9..0caec499a95be 100644
--- a/pkgs/development/python-modules/slob/default.nix
+++ b/pkgs/development/python-modules/slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy3k
diff --git a/pkgs/development/python-modules/slowaes/default.nix b/pkgs/development/python-modules/slowaes/default.nix
index 5d738fea57e06..ddca8509744d6 100644
--- a/pkgs/development/python-modules/slowaes/default.nix
+++ b/pkgs/development/python-modules/slowaes/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/smartdc/default.nix b/pkgs/development/python-modules/smartdc/default.nix
index 0b36a7e9f6e7c..ceba9eae9e4b2 100644
--- a/pkgs/development/python-modules/smartdc/default.nix
+++ b/pkgs/development/python-modules/smartdc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests
diff --git a/pkgs/development/python-modules/smartypants/default.nix b/pkgs/development/python-modules/smartypants/default.nix
index a497f3db413b6..d1e11e30d6195 100644
--- a/pkgs/development/python-modules/smartypants/default.nix
+++ b/pkgs/development/python-modules/smartypants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchhg
 , isPyPy
diff --git a/pkgs/development/python-modules/snakeviz/default.nix b/pkgs/development/python-modules/snakeviz/default.nix
index 2c54f65d9c358..42602f15e9bc5 100644
--- a/pkgs/development/python-modules/snakeviz/default.nix
+++ b/pkgs/development/python-modules/snakeviz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, tornado }:
+{ lib, fetchPypi, buildPythonPackage, tornado }:
 
 buildPythonPackage rec {
   pname = "snakeviz";
diff --git a/pkgs/development/python-modules/snapcast/default.nix b/pkgs/development/python-modules/snapcast/default.nix
index 8446683cb1aa3..c5df9f7d991d5 100644
--- a/pkgs/development/python-modules/snapcast/default.nix
+++ b/pkgs/development/python-modules/snapcast/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, pytest
+{ lib, buildPythonPackage, fetchPypi, isPy3k, pytest
 , construct }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/snowballstemmer/default.nix b/pkgs/development/python-modules/snowballstemmer/default.nix
index 3364470da1b3f..84b2bb2e1435a 100644
--- a/pkgs/development/python-modules/snowballstemmer/default.nix
+++ b/pkgs/development/python-modules/snowballstemmer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, PyStemmer, fetchPypi }:
+{ lib, buildPythonPackage, PyStemmer, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "snowballstemmer";
diff --git a/pkgs/development/python-modules/socksipy-branch/default.nix b/pkgs/development/python-modules/socksipy-branch/default.nix
index ca9d8707ac63e..abfee3718b53a 100644
--- a/pkgs/development/python-modules/socksipy-branch/default.nix
+++ b/pkgs/development/python-modules/socksipy-branch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/somajo/default.nix b/pkgs/development/python-modules/somajo/default.nix
index bd351b5e86fac..ba1dd1c30112a 100644
--- a/pkgs/development/python-modules/somajo/default.nix
+++ b/pkgs/development/python-modules/somajo/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
+{ pkgs, lib, fetchFromGitHub, buildPythonPackage, isPy3k, regex }:
 
 buildPythonPackage rec {
   pname = "SoMaJo";
diff --git a/pkgs/development/python-modules/sopel/default.nix b/pkgs/development/python-modules/sopel/default.nix
index 095c0917e5966..7b549933588b0 100644
--- a/pkgs/development/python-modules/sopel/default.nix
+++ b/pkgs/development/python-modules/sopel/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPyPy
+{ lib, buildPythonPackage, fetchPypi, isPyPy
 , dnspython
 , geoip2
 , ipython
diff --git a/pkgs/development/python-modules/sorl_thumbnail/default.nix b/pkgs/development/python-modules/sorl_thumbnail/default.nix
index e918a1aee3bc9..daeca60c1e149 100644
--- a/pkgs/development/python-modules/sorl_thumbnail/default.nix
+++ b/pkgs/development/python-modules/sorl_thumbnail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/spark_parser/default.nix b/pkgs/development/python-modules/spark_parser/default.nix
index ba927431f2c0e..fb30daf81fe7e 100644
--- a/pkgs/development/python-modules/spark_parser/default.nix
+++ b/pkgs/development/python-modules/spark_parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/sparqlwrapper/default.nix b/pkgs/development/python-modules/sparqlwrapper/default.nix
index b97cbee2a5feb..41c11172d9bf0 100644
--- a/pkgs/development/python-modules/sparqlwrapper/default.nix
+++ b/pkgs/development/python-modules/sparqlwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/speaklater/default.nix b/pkgs/development/python-modules/speaklater/default.nix
index efb0908dc5fc3..a9acfb2dbb386 100644
--- a/pkgs/development/python-modules/speaklater/default.nix
+++ b/pkgs/development/python-modules/speaklater/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/spglib/default.nix b/pkgs/development/python-modules/spglib/default.nix
index 08bbb34156bf2..88da35a0f972b 100644
--- a/pkgs/development/python-modules/spglib/default.nix
+++ b/pkgs/development/python-modules/spglib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, numpy, nose, pyyaml }:
 
 buildPythonPackage rec {
   pname = "spglib";
diff --git a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
index 77f283795db5d..d2c20e980e7a9 100644
--- a/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
+++ b/pkgs/development/python-modules/sphinx_pypi_upload/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
index 11e3c2a87e936..87da4131351d3 100644
--- a/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
+++ b/pkgs/development/python-modules/sphinx_rtd_theme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
index e2bfc5bdaa553..9c3c16657f291 100644
--- a/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-applehelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
index 6822c0f153d32..068c4d5d2e943 100644
--- a/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-autoapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
index a2603b876e5e4..956e3c033b9bd 100644
--- a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
index 7398cbc433ffa..1f33c06b984ed 100644
--- a/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-devhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
index 150840f19b40c..8ca631a2b3c91 100644
--- a/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-htmlhelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
index 609799f18647a..cd67732605bbf 100644
--- a/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-jsmath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
index 6375bdab3c24b..a9548305d3bdd 100644
--- a/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-openapi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
index adf02860d1277..9d16ede62a202 100644
--- a/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-qthelp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
index 52ebe15c1b62e..b898e9cb67d23 100644
--- a/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-serializinghtml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
index a3054f341450d..2b5beb4df079c 100644
--- a/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-spelling/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
index ee652b42d8a15..21ada23d47f49 100644
--- a/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_httpdomain/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
index 2d56b57df9bed..a298025f8ba3b 100644
--- a/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_newsfeed/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
index db8997dfd2162..e028b6eea80ed 100644
--- a/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib_plantuml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , sphinx
diff --git a/pkgs/development/python-modules/spyder-kernels/default.nix b/pkgs/development/python-modules/spyder-kernels/default.nix
index e0a8d6b9c18ae..9533db6e4a73b 100644
--- a/pkgs/development/python-modules/spyder-kernels/default.nix
+++ b/pkgs/development/python-modules/spyder-kernels/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
+{ lib, buildPythonPackage, fetchPypi, cloudpickle, ipykernel, wurlitzer,
   jupyter_client, pyzmq }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/spyder/3.nix b/pkgs/development/python-modules/spyder/3.nix
index 34d59d0eb227c..0fb98fa38e3df 100644
--- a/pkgs/development/python-modules/spyder/3.nix
+++ b/pkgs/development/python-modules/spyder/3.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchFromGitHub, jedi, pycodestyle,
   psutil, pyflakes, rope, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels_0_5, qtpy, pyzmq, chardet, pyqtwebengine
diff --git a/pkgs/development/python-modules/spyder/default.nix b/pkgs/development/python-modules/spyder/default.nix
index 26013e71158df..e7c94ec724b54 100644
--- a/pkgs/development/python-modules/spyder/default.nix
+++ b/pkgs/development/python-modules/spyder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
+{ lib, buildPythonPackage, fetchPypi, isPy27, makeDesktopItem, intervaltree, jedi, pycodestyle,
   psutil, pyflakes, rope, numpy, scipy, matplotlib, pylint, keyring, numpydoc,
   qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
   spyder-kernels, qtpy, pyzmq, chardet, qdarkstyle, watchdog, python-language-server
diff --git a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
index 4050adc29f551..33b408240fc66 100644
--- a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , flask
diff --git a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
index 4ef0adefe3e74..84be4587e66e9 100644
--- a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , sqlalchemy
diff --git a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
index 6a8c910cfce6a..15ac7dc3a555c 100644
--- a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pytest
 , Wand
diff --git a/pkgs/development/python-modules/sqlite3dbm/default.nix b/pkgs/development/python-modules/sqlite3dbm/default.nix
index 1d0b3f15c3fcd..3057f89adf4e2 100644
--- a/pkgs/development/python-modules/sqlite3dbm/default.nix
+++ b/pkgs/development/python-modules/sqlite3dbm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sqlobject/default.nix b/pkgs/development/python-modules/sqlobject/default.nix
index ccbc6659fe3dd..f3c438342bce7 100644
--- a/pkgs/development/python-modules/sqlobject/default.nix
+++ b/pkgs/development/python-modules/sqlobject/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/squaremap/default.nix b/pkgs/development/python-modules/squaremap/default.nix
index c17a88435dd67..bab9e2f99f285 100644
--- a/pkgs/development/python-modules/squaremap/default.nix
+++ b/pkgs/development/python-modules/squaremap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , isPy3k
 , fetchPypi
diff --git a/pkgs/development/python-modules/srp/default.nix b/pkgs/development/python-modules/srp/default.nix
index 2afbb22d64e50..c0d3a0a4aedc6 100644
--- a/pkgs/development/python-modules/srp/default.nix
+++ b/pkgs/development/python-modules/srp/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, six, lib }:
+{ buildPythonPackage, fetchPypi, six, lib }:
 
 buildPythonPackage rec {
   pname = "srp";
diff --git a/pkgs/development/python-modules/srptools/default.nix b/pkgs/development/python-modules/srptools/default.nix
index f130009d30d68..68ca009d9dc27 100644
--- a/pkgs/development/python-modules/srptools/default.nix
+++ b/pkgs/development/python-modules/srptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
+{ lib, buildPythonPackage, fetchPypi, six, pytest, pytestrunner }:
 
 buildPythonPackage rec {
   pname = "srptools";
diff --git a/pkgs/development/python-modules/srsly/default.nix b/pkgs/development/python-modules/srsly/default.nix
index 42320e50fa8db..86b689d09d148 100644
--- a/pkgs/development/python-modules/srsly/default.nix
+++ b/pkgs/development/python-modules/srsly/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/srvlookup/default.nix b/pkgs/development/python-modules/srvlookup/default.nix
index c399ee760fd6c..f325d40ba92d9 100644
--- a/pkgs/development/python-modules/srvlookup/default.nix
+++ b/pkgs/development/python-modules/srvlookup/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , dnspython
 , mock, nose
 }:
diff --git a/pkgs/development/python-modules/ssdeep/default.nix b/pkgs/development/python-modules/ssdeep/default.nix
index 8300c3ec2f656..904595865b8c0 100644
--- a/pkgs/development/python-modules/ssdeep/default.nix
+++ b/pkgs/development/python-modules/ssdeep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pkgs
diff --git a/pkgs/development/python-modules/ssdp/default.nix b/pkgs/development/python-modules/ssdp/default.nix
index 82ea4b066a3c4..ac39cffa393ec 100644
--- a/pkgs/development/python-modules/ssdp/default.nix
+++ b/pkgs/development/python-modules/ssdp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/sseclient/default.nix b/pkgs/development/python-modules/sseclient/default.nix
index 9d944e112fe27..6bbeb23ed1f57 100644
--- a/pkgs/development/python-modules/sseclient/default.nix
+++ b/pkgs/development/python-modules/sseclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , requests, six
 , backports_unittest-mock, pytestCheckHook, pytestrunner }:
 
diff --git a/pkgs/development/python-modules/sslib/default.nix b/pkgs/development/python-modules/sslib/default.nix
index 026ac8a30b752..407053785f09c 100644
--- a/pkgs/development/python-modules/sslib/default.nix
+++ b/pkgs/development/python-modules/sslib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy3k }:
+{ lib, fetchPypi, buildPythonPackage, isPy3k }:
 
 buildPythonPackage rec {
   pname = "sslib";
diff --git a/pkgs/development/python-modules/statsd/default.nix b/pkgs/development/python-modules/statsd/default.nix
index 447fed3263c3b..561a1d14ca424 100644
--- a/pkgs/development/python-modules/statsd/default.nix
+++ b/pkgs/development/python-modules/statsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/stompclient/default.nix b/pkgs/development/python-modules/stompclient/default.nix
index 17bafbad282e0..149be55da5807 100644
--- a/pkgs/development/python-modules/stompclient/default.nix
+++ b/pkgs/development/python-modules/stompclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/strict-rfc3339/default.nix b/pkgs/development/python-modules/strict-rfc3339/default.nix
index 53701999b0211..e76365a525adf 100644
--- a/pkgs/development/python-modules/strict-rfc3339/default.nix
+++ b/pkgs/development/python-modules/strict-rfc3339/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "strict-rfc3339";
diff --git a/pkgs/development/python-modules/stringcase/default.nix b/pkgs/development/python-modules/stringcase/default.nix
index 10afb5113931d..e02cc0384f9a4 100644
--- a/pkgs/development/python-modules/stringcase/default.nix
+++ b/pkgs/development/python-modules/stringcase/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, lib, stdenv
+{ buildPythonPackage, fetchPypi, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/subdownloader/default.nix b/pkgs/development/python-modules/subdownloader/default.nix
index 2dac94ac15d2e..2b536fa0e6286 100644
--- a/pkgs/development/python-modules/subdownloader/default.nix
+++ b/pkgs/development/python-modules/subdownloader/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , mmpython
diff --git a/pkgs/development/python-modules/suds-jurko/default.nix b/pkgs/development/python-modules/suds-jurko/default.nix
index 4bf74fe00b4ef..af307919387f6 100644
--- a/pkgs/development/python-modules/suds-jurko/default.nix
+++ b/pkgs/development/python-modules/suds-jurko/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/suds/default.nix b/pkgs/development/python-modules/suds/default.nix
index 24425fef95f14..1a96df26da1da 100644
--- a/pkgs/development/python-modules/suds/default.nix
+++ b/pkgs/development/python-modules/suds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/sumo/default.nix b/pkgs/development/python-modules/sumo/default.nix
index e647cd4a9d270..e1b3d8c705ebc 100644
--- a/pkgs/development/python-modules/sumo/default.nix
+++ b/pkgs/development/python-modules/sumo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, isPy27
+{ lib, buildPythonPackage, fetchFromGitHub, isPy27
 , h5py
 , matplotlib
 , numpy
diff --git a/pkgs/development/python-modules/sure/default.nix b/pkgs/development/python-modules/sure/default.nix
index efff79f679f40..ee21e9c451687 100644
--- a/pkgs/development/python-modules/sure/default.nix
+++ b/pkgs/development/python-modules/sure/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , rednose
diff --git a/pkgs/development/python-modules/survey/default.nix b/pkgs/development/python-modules/survey/default.nix
index f9bec0451ff45..436127fae9c45 100644
--- a/pkgs/development/python-modules/survey/default.nix
+++ b/pkgs/development/python-modules/survey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , wrapio
diff --git a/pkgs/development/python-modules/svg-path/default.nix b/pkgs/development/python-modules/svg-path/default.nix
index 585dbf64b3c38..820d4121633b3 100644
--- a/pkgs/development/python-modules/svg-path/default.nix
+++ b/pkgs/development/python-modules/svg-path/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "svg.path";
   version = "4.0.2";
diff --git a/pkgs/development/python-modules/svg2tikz/default.nix b/pkgs/development/python-modules/svg2tikz/default.nix
index fb0475ef3b979..38516ab73c3ec 100644
--- a/pkgs/development/python-modules/svg2tikz/default.nix
+++ b/pkgs/development/python-modules/svg2tikz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchgit
 , lxml
diff --git a/pkgs/development/python-modules/swagger-ui-bundle/default.nix b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
index 613de201b2d16..9dbd29739fe85 100644
--- a/pkgs/development/python-modules/swagger-ui-bundle/default.nix
+++ b/pkgs/development/python-modules/swagger-ui-bundle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, jinja2, flake8 }:
+{ lib, buildPythonPackage, fetchPypi, jinja2, flake8 }:
 
 buildPythonPackage rec {
   pname = "swagger-ui-bundle";
diff --git a/pkgs/development/python-modules/swspotify/default.nix b/pkgs/development/python-modules/swspotify/default.nix
index 321a48e72b6f5..e213e9e265eff 100644
--- a/pkgs/development/python-modules/swspotify/default.nix
+++ b/pkgs/development/python-modules/swspotify/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
+{ lib, buildPythonPackage, fetchFromGitHub, requests, flask-cors, dbus-python, pytestCheckHook, mock, isPy27 }:
 
 buildPythonPackage rec {
   pname = "SwSpotify";
diff --git a/pkgs/development/python-modules/sybase/default.nix b/pkgs/development/python-modules/sybase/default.nix
index 20c2a158a3b25..5a14e7e7f40ea 100644
--- a/pkgs/development/python-modules/sybase/default.nix
+++ b/pkgs/development/python-modules/sybase/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , isPy3k
diff --git a/pkgs/development/python-modules/systemd/default.nix b/pkgs/development/python-modules/systemd/default.nix
index 2035ce8b26ba9..86c330bd1d880 100644
--- a/pkgs/development/python-modules/systemd/default.nix
+++ b/pkgs/development/python-modules/systemd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
+{ lib, buildPythonPackage, fetchFromGitHub, systemd, pkg-config }:
 
 buildPythonPackage rec {
   pname = "systemd";
diff --git a/pkgs/development/python-modules/sysv_ipc/default.nix b/pkgs/development/python-modules/sysv_ipc/default.nix
index 87a81e4fb17da..5d9b5a034c2b7 100644
--- a/pkgs/development/python-modules/sysv_ipc/default.nix
+++ b/pkgs/development/python-modules/sysv_ipc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tarman/default.nix b/pkgs/development/python-modules/tarman/default.nix
index 682da22ced8a5..c2a2c4405e287 100644
--- a/pkgs/development/python-modules/tarman/default.nix
+++ b/pkgs/development/python-modules/tarman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/taskw/default.nix b/pkgs/development/python-modules/taskw/default.nix
index 5a1358947130d..9e1ae3302c122 100644
--- a/pkgs/development/python-modules/taskw/default.nix
+++ b/pkgs/development/python-modules/taskw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tatsu/default.nix b/pkgs/development/python-modules/tatsu/default.nix
index cba34a95a7bd8..540c315c8ff65 100644
--- a/pkgs/development/python-modules/tatsu/default.nix
+++ b/pkgs/development/python-modules/tatsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , colorama, mypy, pyyaml, regex
 , dataclasses, typing
 , pytestrunner, pytest-mypy
diff --git a/pkgs/development/python-modules/tblib/default.nix b/pkgs/development/python-modules/tblib/default.nix
index 7e704e0b2c601..2f06b665d33f8 100644
--- a/pkgs/development/python-modules/tblib/default.nix
+++ b/pkgs/development/python-modules/tblib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "tblib";
diff --git a/pkgs/development/python-modules/telegram/default.nix b/pkgs/development/python-modules/telegram/default.nix
index 95293d095fd53..c297efc0efdd9 100644
--- a/pkgs/development/python-modules/telegram/default.nix
+++ b/pkgs/development/python-modules/telegram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/tensorflow-estimator/default.nix b/pkgs/development/python-modules/tensorflow-estimator/default.nix
index bca75224fa3e5..dd3b4641beaf8 100644
--- a/pkgs/development/python-modules/tensorflow-estimator/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , numpy
 , absl-py
 , mock
diff --git a/pkgs/development/python-modules/termcolor/default.nix b/pkgs/development/python-modules/termcolor/default.nix
index df0f4d6208a3c..e440dab114faf 100644
--- a/pkgs/development/python-modules/termcolor/default.nix
+++ b/pkgs/development/python-modules/termcolor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/terminaltables/default.nix b/pkgs/development/python-modules/terminaltables/default.nix
index 28e49316ad714..51a0b0712240b 100644
--- a/pkgs/development/python-modules/terminaltables/default.nix
+++ b/pkgs/development/python-modules/terminaltables/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index a5ab52e5cdd5d..c95bd0c78b66f 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/testrepository/default.nix b/pkgs/development/python-modules/testrepository/default.nix
index c249ca212b6dd..45093a5f7cf7c 100644
--- a/pkgs/development/python-modules/testrepository/default.nix
+++ b/pkgs/development/python-modules/testrepository/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/testscenarios/default.nix b/pkgs/development/python-modules/testscenarios/default.nix
index 465384edcb0c7..8df35ac4b8895 100644
--- a/pkgs/development/python-modules/testscenarios/default.nix
+++ b/pkgs/development/python-modules/testscenarios/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , testtools
diff --git a/pkgs/development/python-modules/threadpool/default.nix b/pkgs/development/python-modules/threadpool/default.nix
index 7a1696feb665b..9c83e7e45c287 100644
--- a/pkgs/development/python-modules/threadpool/default.nix
+++ b/pkgs/development/python-modules/threadpool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/thrift/default.nix b/pkgs/development/python-modules/thrift/default.nix
index c7279b867b106..7b16d66687057 100644
--- a/pkgs/development/python-modules/thrift/default.nix
+++ b/pkgs/development/python-modules/thrift/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/thumborpexif/default.nix b/pkgs/development/python-modules/thumborpexif/default.nix
index abfad4ffaac9d..28b2e5a9f93cf 100644
--- a/pkgs/development/python-modules/thumborpexif/default.nix
+++ b/pkgs/development/python-modules/thumborpexif/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/tilestache/default.nix b/pkgs/development/python-modules/tilestache/default.nix
index 170360c133ed7..ce46fd56f243f 100644
--- a/pkgs/development/python-modules/tilestache/default.nix
+++ b/pkgs/development/python-modules/tilestache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , modestmaps
diff --git a/pkgs/development/python-modules/timelib/default.nix b/pkgs/development/python-modules/timelib/default.nix
index 65b121ddfafd1..e2f3cc1d3cc8f 100644
--- a/pkgs/development/python-modules/timelib/default.nix
+++ b/pkgs/development/python-modules/timelib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/timeout-decorator/default.nix b/pkgs/development/python-modules/timeout-decorator/default.nix
index b1160cafe3091..c2d21fea153fe 100644
--- a/pkgs/development/python-modules/timeout-decorator/default.nix
+++ b/pkgs/development/python-modules/timeout-decorator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 buildPythonPackage rec {
   pname = "timeout-decorator";
   version = "0.5.0";
diff --git a/pkgs/development/python-modules/tissue/default.nix b/pkgs/development/python-modules/tissue/default.nix
index fc4316c98fe97..e1ef7f9edf46a 100644
--- a/pkgs/development/python-modules/tissue/default.nix
+++ b/pkgs/development/python-modules/tissue/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/tlsh/default.nix b/pkgs/development/python-modules/tlsh/default.nix
index 302b113364d24..7be95b9708887 100644
--- a/pkgs/development/python-modules/tlsh/default.nix
+++ b/pkgs/development/python-modules/tlsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/development/python-modules/tlslite-ng/default.nix b/pkgs/development/python-modules/tlslite-ng/default.nix
index a952c95d93e4a..37751890c7b39 100644
--- a/pkgs/development/python-modules/tlslite-ng/default.nix
+++ b/pkgs/development/python-modules/tlslite-ng/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , ecdsa
diff --git a/pkgs/development/python-modules/tlslite/default.nix b/pkgs/development/python-modules/tlslite/default.nix
index a1e78c5db76c2..52b662be2b2e4 100644
--- a/pkgs/development/python-modules/tlslite/default.nix
+++ b/pkgs/development/python-modules/tlslite/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/toggl-cli/default.nix b/pkgs/development/python-modules/toggl-cli/default.nix
index 875e70cee58ed..d7eece650026a 100644
--- a/pkgs/development/python-modules/toggl-cli/default.nix
+++ b/pkgs/development/python-modules/toggl-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
+{ lib, buildPythonPackage, fetchPypi, pythonAtLeast, pythonOlder
 , click
 , click-completion
 , factory_boy
diff --git a/pkgs/development/python-modules/tokenizers/default.nix b/pkgs/development/python-modules/tokenizers/default.nix
index ec435a0ac3595..cf122613f633c 100644
--- a/pkgs/development/python-modules/tokenizers/default.nix
+++ b/pkgs/development/python-modules/tokenizers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , fetchurl
diff --git a/pkgs/development/python-modules/tokenlib/default.nix b/pkgs/development/python-modules/tokenlib/default.nix
index 2bed188701661..bed053f828268 100644
--- a/pkgs/development/python-modules/tokenlib/default.nix
+++ b/pkgs/development/python-modules/tokenlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/toml/default.nix b/pkgs/development/python-modules/toml/default.nix
index 0d0d87c73d117..bdc1b141eed72 100644
--- a/pkgs/development/python-modules/toml/default.nix
+++ b/pkgs/development/python-modules/toml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "toml";
diff --git a/pkgs/development/python-modules/toposort/default.nix b/pkgs/development/python-modules/toposort/default.nix
index 43df3c4e21e94..540835c7e3100 100644
--- a/pkgs/development/python-modules/toposort/default.nix
+++ b/pkgs/development/python-modules/toposort/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/torchvision/default.nix b/pkgs/development/python-modules/torchvision/default.nix
index 928616eb4f8ad..79f6a19ffcb53 100644
--- a/pkgs/development/python-modules/torchvision/default.nix
+++ b/pkgs/development/python-modules/torchvision/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , ninja
diff --git a/pkgs/development/python-modules/traceback2/default.nix b/pkgs/development/python-modules/traceback2/default.nix
index 5309ae47a02d5..040874286bde0 100644
--- a/pkgs/development/python-modules/traceback2/default.nix
+++ b/pkgs/development/python-modules/traceback2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/tracing/default.nix b/pkgs/development/python-modules/tracing/default.nix
index f4c01f003a9a2..c2adc9ec9c5aa 100644
--- a/pkgs/development/python-modules/tracing/default.nix
+++ b/pkgs/development/python-modules/tracing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/traits/default.nix b/pkgs/development/python-modules/traits/default.nix
index e3bc8b43fe4e7..d9986dd87fe15 100644
--- a/pkgs/development/python-modules/traits/default.nix
+++ b/pkgs/development/python-modules/traits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/transaction/default.nix b/pkgs/development/python-modules/transaction/default.nix
index def2559a72d0d..6bb5987ba484d 100644
--- a/pkgs/development/python-modules/transaction/default.nix
+++ b/pkgs/development/python-modules/transaction/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , zope_interface
diff --git a/pkgs/development/python-modules/transformers/default.nix b/pkgs/development/python-modules/transformers/default.nix
index 5942047544085..efc33ad8a23f7 100644
--- a/pkgs/development/python-modules/transformers/default.nix
+++ b/pkgs/development/python-modules/transformers/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchFromGitHub
 , pythonOlder
 , cookiecutter
diff --git a/pkgs/development/python-modules/transip/default.nix b/pkgs/development/python-modules/transip/default.nix
index e270d5a0662dd..94d3cb85be402 100644
--- a/pkgs/development/python-modules/transip/default.nix
+++ b/pkgs/development/python-modules/transip/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , isPy27
diff --git a/pkgs/development/python-modules/translationstring/default.nix b/pkgs/development/python-modules/translationstring/default.nix
index 2f39b57b480fe..f7036128e08ec 100644
--- a/pkgs/development/python-modules/translationstring/default.nix
+++ b/pkgs/development/python-modules/translationstring/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/transmissionrpc/default.nix b/pkgs/development/python-modules/transmissionrpc/default.nix
index a128b150579a7..39901a17f00fc 100644
--- a/pkgs/development/python-modules/transmissionrpc/default.nix
+++ b/pkgs/development/python-modules/transmissionrpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/treq/default.nix b/pkgs/development/python-modules/treq/default.nix
index 477223e96186b..447e2a5b98633 100644
--- a/pkgs/development/python-modules/treq/default.nix
+++ b/pkgs/development/python-modules/treq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, service-identity, requests, six
+{ lib, fetchPypi, buildPythonPackage, service-identity, requests, six
 , mock, twisted, incremental, pep8, httpbin
 }:
 
diff --git a/pkgs/development/python-modules/trezor_agent/default.nix b/pkgs/development/python-modules/trezor_agent/default.nix
index 537b4db7995ab..cef74c8636b74 100644
--- a/pkgs/development/python-modules/trezor_agent/default.nix
+++ b/pkgs/development/python-modules/trezor_agent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , trezor
diff --git a/pkgs/development/python-modules/trueskill/default.nix b/pkgs/development/python-modules/trueskill/default.nix
index 0c3efa404ec62..db16ed7fafbc8 100644
--- a/pkgs/development/python-modules/trueskill/default.nix
+++ b/pkgs/development/python-modules/trueskill/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , six }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ttystatus/default.nix b/pkgs/development/python-modules/ttystatus/default.nix
index 24eb10637078a..f32045ce9cdef 100644
--- a/pkgs/development/python-modules/ttystatus/default.nix
+++ b/pkgs/development/python-modules/ttystatus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , sphinx
diff --git a/pkgs/development/python-modules/tvdb_api/default.nix b/pkgs/development/python-modules/tvdb_api/default.nix
index f2cdbe8dc6331..845aff673b761 100644
--- a/pkgs/development/python-modules/tvdb_api/default.nix
+++ b/pkgs/development/python-modules/tvdb_api/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , requests-cache
diff --git a/pkgs/development/python-modules/tvnamer/default.nix b/pkgs/development/python-modules/tvnamer/default.nix
index fa155b86f4070..6a720421c72ff 100644
--- a/pkgs/development/python-modules/tvnamer/default.nix
+++ b/pkgs/development/python-modules/tvnamer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/twiggy/default.nix b/pkgs/development/python-modules/twiggy/default.nix
index 9647dc8ae67cf..45e59860227aa 100644
--- a/pkgs/development/python-modules/twiggy/default.nix
+++ b/pkgs/development/python-modules/twiggy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/twilio/default.nix b/pkgs/development/python-modules/twilio/default.nix
index 7931a4ad0ec9e..ff4bb845c8998 100644
--- a/pkgs/development/python-modules/twilio/default.nix
+++ b/pkgs/development/python-modules/twilio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pyjwt, pysocks, pytz, requests, six, nose, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/twitter-common-collections/default.nix b/pkgs/development/python-modules/twitter-common-collections/default.nix
index 72f30514dc67a..644a97d2b2ec0 100644
--- a/pkgs/development/python-modules/twitter-common-collections/default.nix
+++ b/pkgs/development/python-modules/twitter-common-collections/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-confluence/default.nix b/pkgs/development/python-modules/twitter-common-confluence/default.nix
index ee5bf9bdbe10e..d718a18822bed 100644
--- a/pkgs/development/python-modules/twitter-common-confluence/default.nix
+++ b/pkgs/development/python-modules/twitter-common-confluence/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-log
diff --git a/pkgs/development/python-modules/twitter-common-dirutil/default.nix b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
index 14b0bcd0673c2..bf9ec099ddbae 100644
--- a/pkgs/development/python-modules/twitter-common-dirutil/default.nix
+++ b/pkgs/development/python-modules/twitter-common-dirutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-lang
diff --git a/pkgs/development/python-modules/twitter-common-lang/default.nix b/pkgs/development/python-modules/twitter-common-lang/default.nix
index 4b4a5c0fc2e24..93178f4679217 100644
--- a/pkgs/development/python-modules/twitter-common-lang/default.nix
+++ b/pkgs/development/python-modules/twitter-common-lang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter-common-log/default.nix b/pkgs/development/python-modules/twitter-common-log/default.nix
index 8cf99c39dc206..61f5d99a8f1c6 100644
--- a/pkgs/development/python-modules/twitter-common-log/default.nix
+++ b/pkgs/development/python-modules/twitter-common-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twitter-common-options
diff --git a/pkgs/development/python-modules/twitter-common-options/default.nix b/pkgs/development/python-modules/twitter-common-options/default.nix
index a5505330bc0a0..b3ae7f7f5d94c 100644
--- a/pkgs/development/python-modules/twitter-common-options/default.nix
+++ b/pkgs/development/python-modules/twitter-common-options/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/twitter/default.nix b/pkgs/development/python-modules/twitter/default.nix
index 23d647d93153c..7114dc661f427 100644
--- a/pkgs/development/python-modules/twitter/default.nix
+++ b/pkgs/development/python-modules/twitter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/txaio/default.nix b/pkgs/development/python-modules/txaio/default.nix
index 4d756fa89f3f3..814b6234ee3b9 100644
--- a/pkgs/development/python-modules/txaio/default.nix
+++ b/pkgs/development/python-modules/txaio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, six, twisted, isPy37, isPy27 }:
 
 buildPythonPackage rec {
   pname = "txaio";
diff --git a/pkgs/development/python-modules/txamqp/default.nix b/pkgs/development/python-modules/txamqp/default.nix
index f0e3904a8815a..cc66e041ae38a 100644
--- a/pkgs/development/python-modules/txamqp/default.nix
+++ b/pkgs/development/python-modules/txamqp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/txdbus/default.nix b/pkgs/development/python-modules/txdbus/default.nix
index 461ddeee34b41..31afbd4fdf950 100644
--- a/pkgs/development/python-modules/txdbus/default.nix
+++ b/pkgs/development/python-modules/txdbus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, six, twisted }:
+{ lib, buildPythonPackage, fetchPypi, six, twisted }:
 
 buildPythonPackage rec {
   pname = "txdbus";
diff --git a/pkgs/development/python-modules/txgithub/default.nix b/pkgs/development/python-modules/txgithub/default.nix
index 402e5011ede63..09af476e94df4 100644
--- a/pkgs/development/python-modules/txgithub/default.nix
+++ b/pkgs/development/python-modules/txgithub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pyopenssl
diff --git a/pkgs/development/python-modules/txrequests/default.nix b/pkgs/development/python-modules/txrequests/default.nix
index 06979e2b9b395..be32dc4a7387e 100644
--- a/pkgs/development/python-modules/txrequests/default.nix
+++ b/pkgs/development/python-modules/txrequests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , twisted
diff --git a/pkgs/development/python-modules/typeguard/default.nix b/pkgs/development/python-modules/typeguard/default.nix
index 448e52af7afab..7aced09b33da8 100644
--- a/pkgs/development/python-modules/typeguard/default.nix
+++ b/pkgs/development/python-modules/typeguard/default.nix
@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , pythonOlder
-, lib, stdenv
+, lib
 , setuptools_scm
 , pytest
 , typing-extensions
diff --git a/pkgs/development/python-modules/typogrify/default.nix b/pkgs/development/python-modules/typogrify/default.nix
index faa1c8641c05e..25445d8a7d294 100644
--- a/pkgs/development/python-modules/typogrify/default.nix
+++ b/pkgs/development/python-modules/typogrify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/tzlocal/default.nix b/pkgs/development/python-modules/tzlocal/default.nix
index df0923833fd5b..a7cd91d6845b6 100644
--- a/pkgs/development/python-modules/tzlocal/default.nix
+++ b/pkgs/development/python-modules/tzlocal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytz }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ua-parser/default.nix b/pkgs/development/python-modules/ua-parser/default.nix
index 370ed527d193e..36d725d14f459 100644
--- a/pkgs/development/python-modules/ua-parser/default.nix
+++ b/pkgs/development/python-modules/ua-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pyyaml }:
+{ lib, buildPythonPackage, fetchPypi, pyyaml }:
 
 buildPythonPackage rec {
   pname = "ua-parser";
diff --git a/pkgs/development/python-modules/ujson/2.nix b/pkgs/development/python-modules/ujson/2.nix
index f31b26a1960ab..36aa5a020c357 100644
--- a/pkgs/development/python-modules/ujson/2.nix
+++ b/pkgs/development/python-modules/ujson/2.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptools_scm
diff --git a/pkgs/development/python-modules/ujson/default.nix b/pkgs/development/python-modules/ujson/default.nix
index 1c12a092a2f5d..9c759bd41b363 100644
--- a/pkgs/development/python-modules/ujson/default.nix
+++ b/pkgs/development/python-modules/ujson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/umalqurra/default.nix b/pkgs/development/python-modules/umalqurra/default.nix
index 4411dbac11b84..0e1b4c681e5ba 100644
--- a/pkgs/development/python-modules/umalqurra/default.nix
+++ b/pkgs/development/python-modules/umalqurra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/umemcache/default.nix b/pkgs/development/python-modules/umemcache/default.nix
index f852483cda689..26f8ba02756ca 100644
--- a/pkgs/development/python-modules/umemcache/default.nix
+++ b/pkgs/development/python-modules/umemcache/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, isPy3k, fetchurl }:
+{ lib, buildPythonPackage, isPy3k, fetchurl }:
 
 buildPythonPackage rec {
   pname = "umemcache";
diff --git a/pkgs/development/python-modules/uncertainties/default.nix b/pkgs/development/python-modules/uncertainties/default.nix
index 117188198ca8d..b43927c063ecb 100644
--- a/pkgs/development/python-modules/uncertainties/default.nix
+++ b/pkgs/development/python-modules/uncertainties/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , nose, numpy, future
 }:
 
diff --git a/pkgs/development/python-modules/uncompyle6/default.nix b/pkgs/development/python-modules/uncompyle6/default.nix
index 4f8d461c87e27..31095fcd50e60 100644
--- a/pkgs/development/python-modules/uncompyle6/default.nix
+++ b/pkgs/development/python-modules/uncompyle6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonAtLeast
diff --git a/pkgs/development/python-modules/unicode-slugify/default.nix b/pkgs/development/python-modules/unicode-slugify/default.nix
index 80ac5151b53f4..a0574f948f0da 100644
--- a/pkgs/development/python-modules/unicode-slugify/default.nix
+++ b/pkgs/development/python-modules/unicode-slugify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/unicodecsv/default.nix b/pkgs/development/python-modules/unicodecsv/default.nix
index 9393ff58bc27d..ede2b0d3f093b 100644
--- a/pkgs/development/python-modules/unicodecsv/default.nix
+++ b/pkgs/development/python-modules/unicodecsv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/unidecode/default.nix b/pkgs/development/python-modules/unidecode/default.nix
index 34de3d713866f..70724bb71b51c 100644
--- a/pkgs/development/python-modules/unidecode/default.nix
+++ b/pkgs/development/python-modules/unidecode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "Unidecode";
diff --git a/pkgs/development/python-modules/unifi/default.nix b/pkgs/development/python-modules/unifi/default.nix
index 66ab9ba3972b1..fc98695dd6fa1 100644
--- a/pkgs/development/python-modules/unifi/default.nix
+++ b/pkgs/development/python-modules/unifi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage
+{ lib, buildPythonPackage
 , fetchPypi, urllib3 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/unittest2/default.nix b/pkgs/development/python-modules/unittest2/default.nix
index a7c1252f4b46d..ae8cab53b0c57 100644
--- a/pkgs/development/python-modules/unittest2/default.nix
+++ b/pkgs/development/python-modules/unittest2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/unpaddedbase64/default.nix b/pkgs/development/python-modules/unpaddedbase64/default.nix
index 52d2a42b4bafe..96b27127cc608 100644
--- a/pkgs/development/python-modules/unpaddedbase64/default.nix
+++ b/pkgs/development/python-modules/unpaddedbase64/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/development/python-modules/upass/default.nix b/pkgs/development/python-modules/upass/default.nix
index 442876d7a975d..61197c7219da4 100644
--- a/pkgs/development/python-modules/upass/default.nix
+++ b/pkgs/development/python-modules/upass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchurl
 , pyperclip
diff --git a/pkgs/development/python-modules/update_checker/default.nix b/pkgs/development/python-modules/update_checker/default.nix
index f9171e8cbc9d2..432232c60f916 100644
--- a/pkgs/development/python-modules/update_checker/default.nix
+++ b/pkgs/development/python-modules/update_checker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, requests, isPy27
+{ lib, buildPythonPackage, fetchPypi, requests, isPy27
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uproot3-methods/default.nix b/pkgs/development/python-modules/uproot3-methods/default.nix
index 5164bf854ada9..21fe31630de6e 100644
--- a/pkgs/development/python-modules/uproot3-methods/default.nix
+++ b/pkgs/development/python-modules/uproot3-methods/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/uptime/default.nix b/pkgs/development/python-modules/uptime/default.nix
index 8f8c067d36ae1..640d2a6ed570b 100644
--- a/pkgs/development/python-modules/uptime/default.nix
+++ b/pkgs/development/python-modules/uptime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index f5bca2ed0fef5..ff262d6b0a324 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, python, cmake
+{ lib, buildPythonPackage, fetchFromGitHub, python, cmake
 , pyqt5, numpy, scipy, shapely, libarcus, doxygen, gettext, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/uritools/default.nix b/pkgs/development/python-modules/uritools/default.nix
index b06da7c6acc78..2f4710eea46b5 100644
--- a/pkgs/development/python-modules/uritools/default.nix
+++ b/pkgs/development/python-modules/uritools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 buildPythonPackage rec {
   pname = "uritools";
diff --git a/pkgs/development/python-modules/urlgrabber/default.nix b/pkgs/development/python-modules/urlgrabber/default.nix
index 3a7158be73c8d..e78dc9b904dc7 100644
--- a/pkgs/development/python-modules/urlgrabber/default.nix
+++ b/pkgs/development/python-modules/urlgrabber/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pycurl, six }:
+{ lib, buildPythonPackage, fetchPypi, pycurl, six }:
 
 buildPythonPackage rec {
   pname = "urlgrabber";
diff --git a/pkgs/development/python-modules/urwid/default.nix b/pkgs/development/python-modules/urwid/default.nix
index e3c5311136c27..ceb57e86afb32 100644
--- a/pkgs/development/python-modules/urwid/default.nix
+++ b/pkgs/development/python-modules/urwid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isPy27, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "urwid";
diff --git a/pkgs/development/python-modules/urwidtrees/default.nix b/pkgs/development/python-modules/urwidtrees/default.nix
index 4c3a3e896f862..863989156c3d6 100644
--- a/pkgs/development/python-modules/urwidtrees/default.nix
+++ b/pkgs/development/python-modules/urwidtrees/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , glibcLocales
diff --git a/pkgs/development/python-modules/usbtmc/default.nix b/pkgs/development/python-modules/usbtmc/default.nix
index b1f5b301dee44..6dbb6ce184fff 100644
--- a/pkgs/development/python-modules/usbtmc/default.nix
+++ b/pkgs/development/python-modules/usbtmc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonPackage, pyusb }:
+{ lib, fetchurl, buildPythonPackage, pyusb }:
 
 buildPythonPackage rec {
   pname = "usbtmc";
diff --git a/pkgs/development/python-modules/user-agents/default.nix b/pkgs/development/python-modules/user-agents/default.nix
index 7f8470cfbdc82..d01c601c82a0a 100644
--- a/pkgs/development/python-modules/user-agents/default.nix
+++ b/pkgs/development/python-modules/user-agents/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, ua-parser }:
+{ lib, buildPythonPackage, fetchFromGitHub, ua-parser }:
 
 buildPythonPackage rec {
   pname = "user-agents";
diff --git a/pkgs/development/python-modules/validate-email/default.nix b/pkgs/development/python-modules/validate-email/default.nix
index 327cfcf3f0d32..2b1fdb4963d56 100644
--- a/pkgs/development/python-modules/validate-email/default.nix
+++ b/pkgs/development/python-modules/validate-email/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "validate-email";
diff --git a/pkgs/development/python-modules/validictory/default.nix b/pkgs/development/python-modules/validictory/default.nix
index e89b3d7bcd230..29ffb76591eff 100644
--- a/pkgs/development/python-modules/validictory/default.nix
+++ b/pkgs/development/python-modules/validictory/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/vcversioner/default.nix b/pkgs/development/python-modules/vcversioner/default.nix
index 7d73a6e812dde..236bb8d149b6f 100644
--- a/pkgs/development/python-modules/vcversioner/default.nix
+++ b/pkgs/development/python-modules/vcversioner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "vcversioner";
diff --git a/pkgs/development/python-modules/vdf/default.nix b/pkgs/development/python-modules/vdf/default.nix
index 9e4e92d21ae79..846aa7a13dfc6 100644
--- a/pkgs/development/python-modules/vdf/default.nix
+++ b/pkgs/development/python-modules/vdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , pytest, pytestcov, mock }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/vdirsyncer/default.nix b/pkgs/development/python-modules/vdirsyncer/default.nix
index bda65ab490767..1f7642bfe3473 100644
--- a/pkgs/development/python-modules/vdirsyncer/default.nix
+++ b/pkgs/development/python-modules/vdirsyncer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/vega/default.nix b/pkgs/development/python-modules/vega/default.nix
index 3a36d5de6064a..083aa63020980 100644
--- a/pkgs/development/python-modules/vega/default.nix
+++ b/pkgs/development/python-modules/vega/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage , fetchPypi, pythonOlder
+{ lib, buildPythonPackage , fetchPypi, pythonOlder
 , pytest, jupyter_core, pandas, ipywidgets, jupyter, altair }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/venusian/default.nix b/pkgs/development/python-modules/venusian/default.nix
index 68d974aabec80..82e291ae46238 100644
--- a/pkgs/development/python-modules/venusian/default.nix
+++ b/pkgs/development/python-modules/venusian/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/versioneer/default.nix b/pkgs/development/python-modules/versioneer/default.nix
index fa3329503a36d..3685e78d4b4e2 100644
--- a/pkgs/development/python-modules/versioneer/default.nix
+++ b/pkgs/development/python-modules/versioneer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27 }:
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
 
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/versiontools/default.nix b/pkgs/development/python-modules/versiontools/default.nix
index 45b34d95301d5..f74c8610b4ccc 100644
--- a/pkgs/development/python-modules/versiontools/default.nix
+++ b/pkgs/development/python-modules/versiontools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/veryprettytable/default.nix b/pkgs/development/python-modules/veryprettytable/default.nix
index f2c8cee451d3c..003fd6db621cf 100644
--- a/pkgs/development/python-modules/veryprettytable/default.nix
+++ b/pkgs/development/python-modules/veryprettytable/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , termcolor
diff --git a/pkgs/development/python-modules/vidstab/default.nix b/pkgs/development/python-modules/vidstab/default.nix
index 548105a01778c..4119b26259d77 100644
--- a/pkgs/development/python-modules/vidstab/default.nix
+++ b/pkgs/development/python-modules/vidstab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/vine/default.nix b/pkgs/development/python-modules/vine/default.nix
index 048fa435e0bed..8fc895cfa44c3 100644
--- a/pkgs/development/python-modules/vine/default.nix
+++ b/pkgs/development/python-modules/vine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , case, pytest, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/virtualenv-clone/default.nix b/pkgs/development/python-modules/virtualenv-clone/default.nix
index 9b225021cf211..4dfebc13075fe 100644
--- a/pkgs/development/python-modules/virtualenv-clone/default.nix
+++ b/pkgs/development/python-modules/virtualenv-clone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/virtualenvwrapper/default.nix b/pkgs/development/python-modules/virtualenvwrapper/default.nix
index 658f41126fc92..087a1a2ca517b 100644
--- a/pkgs/development/python-modules/virtualenvwrapper/default.nix
+++ b/pkgs/development/python-modules/virtualenvwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pbr
diff --git a/pkgs/development/python-modules/vmprof/default.nix b/pkgs/development/python-modules/vmprof/default.nix
index f8be722ef90f9..3962a1e02c369 100644
--- a/pkgs/development/python-modules/vmprof/default.nix
+++ b/pkgs/development/python-modules/vmprof/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , colorama
diff --git a/pkgs/development/python-modules/vncdo/default.nix b/pkgs/development/python-modules/vncdo/default.nix
index cb1b1677e1b56..ef33a46cc34c0 100644
--- a/pkgs/development/python-modules/vncdo/default.nix
+++ b/pkgs/development/python-modules/vncdo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub
+{ lib, fetchFromGitHub
 , buildPythonPackage, isPy27
 , pillow
 , twisted
diff --git a/pkgs/development/python-modules/voluptuous/default.nix b/pkgs/development/python-modules/voluptuous/default.nix
index 63be8cd4bd051..9882724fbb638 100644
--- a/pkgs/development/python-modules/voluptuous/default.nix
+++ b/pkgs/development/python-modules/voluptuous/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, nose }:
+{ lib, buildPythonPackage, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "voluptuous";
diff --git a/pkgs/development/python-modules/vultr/default.nix b/pkgs/development/python-modules/vultr/default.nix
index d4349d310be2d..975e4098112ab 100644
--- a/pkgs/development/python-modules/vultr/default.nix
+++ b/pkgs/development/python-modules/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , requests
diff --git a/pkgs/development/python-modules/vxi11/default.nix b/pkgs/development/python-modules/vxi11/default.nix
index 5d9531aa904d9..242fe47b33d0f 100644
--- a/pkgs/development/python-modules/vxi11/default.nix
+++ b/pkgs/development/python-modules/vxi11/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, nose }:
+{ lib, buildPythonPackage, fetchFromGitHub, nose }:
 
 buildPythonPackage rec {
   pname = "python-vxi11";
diff --git a/pkgs/development/python-modules/w3lib/default.nix b/pkgs/development/python-modules/w3lib/default.nix
index ae404e01cfb9f..0c80423e36a22 100644
--- a/pkgs/development/python-modules/w3lib/default.nix
+++ b/pkgs/development/python-modules/w3lib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/waitress/default.nix b/pkgs/development/python-modules/waitress/default.nix
index 09f4f66e0b522..4edd4c6ccffbe 100644
--- a/pkgs/development/python-modules/waitress/default.nix
+++ b/pkgs/development/python-modules/waitress/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/wakeonlan/default.nix b/pkgs/development/python-modules/wakeonlan/default.nix
index 29c30e7ba6ada..86d405a33ef93 100644
--- a/pkgs/development/python-modules/wakeonlan/default.nix
+++ b/pkgs/development/python-modules/wakeonlan/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
+{ lib, fetchPypi, buildPythonPackage, setuptools_scm, pytest, mock }:
 
 buildPythonPackage rec {
   pname = "wakeonlan";
diff --git a/pkgs/development/python-modules/warlock/default.nix b/pkgs/development/python-modules/warlock/default.nix
index 80dcabdcb2075..1b62c918f3395 100644
--- a/pkgs/development/python-modules/warlock/default.nix
+++ b/pkgs/development/python-modules/warlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wasabi/default.nix b/pkgs/development/python-modules/wasabi/default.nix
index 5a0c2ecaa5f55..f9bc1916ad602 100644
--- a/pkgs/development/python-modules/wasabi/default.nix
+++ b/pkgs/development/python-modules/wasabi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytestCheckHook
diff --git a/pkgs/development/python-modules/web/default.nix b/pkgs/development/python-modules/web/default.nix
index 84b4cc8dcfbb4..1b40519d592ac 100644
--- a/pkgs/development/python-modules/web/default.nix
+++ b/pkgs/development/python-modules/web/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook
 , cheroot
 , dbutils, mysqlclient, pymysql, mysql-connector, psycopg2
 }:
diff --git a/pkgs/development/python-modules/webapp2/default.nix b/pkgs/development/python-modules/webapp2/default.nix
index 048c5d91b1d2a..841fb5bd74b63 100644
--- a/pkgs/development/python-modules/webapp2/default.nix
+++ b/pkgs/development/python-modules/webapp2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , webob
diff --git a/pkgs/development/python-modules/webhelpers/default.nix b/pkgs/development/python-modules/webhelpers/default.nix
index 040341ed376a0..dcb2bd3817d7e 100644
--- a/pkgs/development/python-modules/webhelpers/default.nix
+++ b/pkgs/development/python-modules/webhelpers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , routes
diff --git a/pkgs/development/python-modules/webob/default.nix b/pkgs/development/python-modules/webob/default.nix
index 78ca8f918a3f4..124b45a2eb397 100644
--- a/pkgs/development/python-modules/webob/default.nix
+++ b/pkgs/development/python-modules/webob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , nose
diff --git a/pkgs/development/python-modules/websockify/default.nix b/pkgs/development/python-modules/websockify/default.nix
index 021344b2207ab..d3072e750419f 100644
--- a/pkgs/development/python-modules/websockify/default.nix
+++ b/pkgs/development/python-modules/websockify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , numpy
diff --git a/pkgs/development/python-modules/webtest/default.nix b/pkgs/development/python-modules/webtest/default.nix
index 98ee58d3f6c40..d56e5415b918a 100644
--- a/pkgs/development/python-modules/webtest/default.nix
+++ b/pkgs/development/python-modules/webtest/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy27
diff --git a/pkgs/development/python-modules/whisper/default.nix b/pkgs/development/python-modules/whisper/default.nix
index ad25df4868a4d..7b084c16267db 100644
--- a/pkgs/development/python-modules/whisper/default.nix
+++ b/pkgs/development/python-modules/whisper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, mock, six }:
+{ lib, buildPythonPackage, fetchPypi, mock, six }:
 
 buildPythonPackage rec {
   pname = "whisper";
diff --git a/pkgs/development/python-modules/whitenoise/default.nix b/pkgs/development/python-modules/whitenoise/default.nix
index 2399c6ed73f22..3c63c727c0d7d 100644
--- a/pkgs/development/python-modules/whitenoise/default.nix
+++ b/pkgs/development/python-modules/whitenoise/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, isPy27 }:
+{ lib, fetchPypi, buildPythonPackage, isPy27 }:
 
 buildPythonPackage rec {
   pname = "whitenoise";
diff --git a/pkgs/development/python-modules/whoosh/default.nix b/pkgs/development/python-modules/whoosh/default.nix
index f5bbccec2a5e3..d3ff703f694a8 100644
--- a/pkgs/development/python-modules/whoosh/default.nix
+++ b/pkgs/development/python-modules/whoosh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ lib, buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "Whoosh";
diff --git a/pkgs/development/python-modules/willow/default.nix b/pkgs/development/python-modules/willow/default.nix
index fbf4965117b3c..3dafd4df44b36 100644
--- a/pkgs/development/python-modules/willow/default.nix
+++ b/pkgs/development/python-modules/willow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
diff --git a/pkgs/development/python-modules/word2vec/default.nix b/pkgs/development/python-modules/word2vec/default.nix
index 647914bfbe5f8..259566c8fc26f 100644
--- a/pkgs/development/python-modules/word2vec/default.nix
+++ b/pkgs/development/python-modules/word2vec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , fetchzip
diff --git a/pkgs/development/python-modules/wordcloud/default.nix b/pkgs/development/python-modules/wordcloud/default.nix
index b4dd108ae739e..80f22efbda859 100644
--- a/pkgs/development/python-modules/wordcloud/default.nix
+++ b/pkgs/development/python-modules/wordcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub
+{ lib, buildPythonPackage, fetchFromGitHub
 , matplotlib
 , mock
 , numpy
diff --git a/pkgs/development/python-modules/worldengine/default.nix b/pkgs/development/python-modules/worldengine/default.nix
index 51c0de77917d5..13ce4bc873d62 100644
--- a/pkgs/development/python-modules/worldengine/default.nix
+++ b/pkgs/development/python-modules/worldengine/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , pythonOlder
 , isPy27
diff --git a/pkgs/development/python-modules/wrapio/default.nix b/pkgs/development/python-modules/wrapio/default.nix
index 757585bd14556..bbbc1917f541a 100644
--- a/pkgs/development/python-modules/wrapio/default.nix
+++ b/pkgs/development/python-modules/wrapio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/ws4py/default.nix b/pkgs/development/python-modules/ws4py/default.nix
index 2b7a66df285c0..8abf78520dca5 100644
--- a/pkgs/development/python-modules/ws4py/default.nix
+++ b/pkgs/development/python-modules/ws4py/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, mock, git
+{ lib, buildPythonPackage, fetchPypi, pytest, mock, git
 , cherrypy, gevent, tornado }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/wsgiproxy/default.nix b/pkgs/development/python-modules/wsgiproxy/default.nix
index 12aa3c88d9680..e2cc26ff143ee 100644
--- a/pkgs/development/python-modules/wsgiproxy/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , paste
diff --git a/pkgs/development/python-modules/wsgiproxy2/default.nix b/pkgs/development/python-modules/wsgiproxy2/default.nix
index 81a2f98b86f85..2a9856cdd0861 100644
--- a/pkgs/development/python-modules/wsgiproxy2/default.nix
+++ b/pkgs/development/python-modules/wsgiproxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/wtforms/default.nix b/pkgs/development/python-modules/wtforms/default.nix
index 45c465ddcba70..96440c438bcbd 100644
--- a/pkgs/development/python-modules/wtforms/default.nix
+++ b/pkgs/development/python-modules/wtforms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , markupsafe
diff --git a/pkgs/development/python-modules/x11_hash/default.nix b/pkgs/development/python-modules/x11_hash/default.nix
index 21bb787402c15..e9cfe31743278 100644
--- a/pkgs/development/python-modules/x11_hash/default.nix
+++ b/pkgs/development/python-modules/x11_hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/x256/default.nix b/pkgs/development/python-modules/x256/default.nix
index 4ceb2dcae791d..4430fa2e4b8a0 100644
--- a/pkgs/development/python-modules/x256/default.nix
+++ b/pkgs/development/python-modules/x256/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xapp/default.nix b/pkgs/development/python-modules/xapp/default.nix
index 28901017b2b57..44435dd6bd8be 100644
--- a/pkgs/development/python-modules/xapp/default.nix
+++ b/pkgs/development/python-modules/xapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonPackage
 , psutil
diff --git a/pkgs/development/python-modules/xattr/default.nix b/pkgs/development/python-modules/xattr/default.nix
index 3583358a5605f..a39c3532f4b8e 100644
--- a/pkgs/development/python-modules/xattr/default.nix
+++ b/pkgs/development/python-modules/xattr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/xcaplib/default.nix b/pkgs/development/python-modules/xcaplib/default.nix
index f6bb5712c2eb1..086eaf1e34884 100644
--- a/pkgs/development/python-modules/xcaplib/default.nix
+++ b/pkgs/development/python-modules/xcaplib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchdarcs
 , isPy3k
diff --git a/pkgs/development/python-modules/xdot/default.nix b/pkgs/development/python-modules/xdot/default.nix
index 21b45b9c322d1..7dbbd89e781bc 100644
--- a/pkgs/development/python-modules/xdot/default.nix
+++ b/pkgs/development/python-modules/xdot/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run, stdenv
+{ lib, buildPythonPackage, fetchPypi, isPy3k, python3, xvfb_run
 , wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gtk3, numpy }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/xhtml2pdf/default.nix b/pkgs/development/python-modules/xhtml2pdf/default.nix
index e3328c7e4534f..efdb40cd6f878 100644
--- a/pkgs/development/python-modules/xhtml2pdf/default.nix
+++ b/pkgs/development/python-modules/xhtml2pdf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pillow
diff --git a/pkgs/development/python-modules/xkcdpass/default.nix b/pkgs/development/python-modules/xkcdpass/default.nix
index 88f7b9b94a1f2..280ce5a790a6b 100644
--- a/pkgs/development/python-modules/xkcdpass/default.nix
+++ b/pkgs/development/python-modules/xkcdpass/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xlrd/default.nix b/pkgs/development/python-modules/xlrd/default.nix
index 031ac047936eb..d880fd8339656 100644
--- a/pkgs/development/python-modules/xlrd/default.nix
+++ b/pkgs/development/python-modules/xlrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , pytest
diff --git a/pkgs/development/python-modules/xlsx2csv/default.nix b/pkgs/development/python-modules/xlsx2csv/default.nix
index a5b67632d836b..6f7726da68d79 100644
--- a/pkgs/development/python-modules/xlsx2csv/default.nix
+++ b/pkgs/development/python-modules/xlsx2csv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index e06daf3c5b86a..fdf042c2ac290 100644
--- a/pkgs/development/python-modules/xml2rfc/default.nix
+++ b/pkgs/development/python-modules/xml2rfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
+{ lib, fetchPypi, buildPythonPackage, pythonAtLeast, intervaltree, pyflakes, requests, lxml, google-i18n-address
 , pycountry, html5lib, six, kitchen, pypdf2, dict2xml, weasyprint, pyyaml, jinja2, ConfigArgParse, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/xmodem/default.nix b/pkgs/development/python-modules/xmodem/default.nix
index 9023c4cc79eee..a53567f7fa8bd 100644
--- a/pkgs/development/python-modules/xmodem/default.nix
+++ b/pkgs/development/python-modules/xmodem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest, which, lrzsz }:
 
 buildPythonPackage rec {
   pname = "xmodem";
diff --git a/pkgs/development/python-modules/xmpppy/default.nix b/pkgs/development/python-modules/xmpppy/default.nix
index fd046adadd97f..65e2b3711fa04 100644
--- a/pkgs/development/python-modules/xmpppy/default.nix
+++ b/pkgs/development/python-modules/xmpppy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchurl, isPy3k }:
+{ lib, buildPythonPackage, fetchurl, isPy3k }:
 buildPythonPackage rec {
   pname = "xmpp.py";
   version = "0.5.0rc1";
diff --git a/pkgs/development/python-modules/xvfbwrapper/default.nix b/pkgs/development/python-modules/xvfbwrapper/default.nix
index 0852fd2e15cfc..f037cb40338cb 100644
--- a/pkgs/development/python-modules/xvfbwrapper/default.nix
+++ b/pkgs/development/python-modules/xvfbwrapper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , xorgserver
diff --git a/pkgs/development/python-modules/xxhash/default.nix b/pkgs/development/python-modules/xxhash/default.nix
index d2f6ae54a4cfb..08bcfcdacdee7 100644
--- a/pkgs/development/python-modules/xxhash/default.nix
+++ b/pkgs/development/python-modules/xxhash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yamllint/default.nix b/pkgs/development/python-modules/yamllint/default.nix
index 7145c504cd923..13545c0430d1e 100644
--- a/pkgs/development/python-modules/yamllint/default.nix
+++ b/pkgs/development/python-modules/yamllint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , nose, pyyaml, pathspec }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/yanc/default.nix b/pkgs/development/python-modules/yanc/default.nix
index 6d4a3b41fbccb..925276c0ad62a 100644
--- a/pkgs/development/python-modules/yanc/default.nix
+++ b/pkgs/development/python-modules/yanc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, pythonOlder, fetchPypi, nose }:
+{ lib, buildPythonPackage, pythonOlder, fetchPypi, nose }:
 
 buildPythonPackage rec {
   pname = "yanc";
diff --git a/pkgs/development/python-modules/yapf/default.nix b/pkgs/development/python-modules/yapf/default.nix
index 36409ae40195d..9c0e9d3539938 100644
--- a/pkgs/development/python-modules/yapf/default.nix
+++ b/pkgs/development/python-modules/yapf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "yapf";
diff --git a/pkgs/development/python-modules/yapsy/default.nix b/pkgs/development/python-modules/yapsy/default.nix
index 359a855a3e5fe..e60b0a114731d 100644
--- a/pkgs/development/python-modules/yapsy/default.nix
+++ b/pkgs/development/python-modules/yapsy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/yarl/default.nix b/pkgs/development/python-modules/yarl/default.nix
index 7a88b695f639d..0aeb85e6ca2d6 100644
--- a/pkgs/development/python-modules/yarl/default.nix
+++ b/pkgs/development/python-modules/yarl/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchPypi
 , buildPythonPackage
 , pythonOlder
diff --git a/pkgs/development/python-modules/ydiff/default.nix b/pkgs/development/python-modules/ydiff/default.nix
index be935b1995c63..e7452b89a539c 100644
--- a/pkgs/development/python-modules/ydiff/default.nix
+++ b/pkgs/development/python-modules/ydiff/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, docutils, pygments
+{ lib, buildPythonPackage, fetchPypi, docutils, pygments
 , gitMinimal, mercurial, subversion, patchutils, less
 }:
 
diff --git a/pkgs/development/python-modules/yowsup/default.nix b/pkgs/development/python-modules/yowsup/default.nix
index 48c21434194f0..0ff3212f48caf 100644
--- a/pkgs/development/python-modules/yowsup/default.nix
+++ b/pkgs/development/python-modules/yowsup/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, lib, stdenv, fetchFromGitHub, six, python-axolotl, pytest
+{ buildPythonPackage, lib, fetchFromGitHub, six, python-axolotl, pytest
 , isPy3k, consonance, appdirs
 }:
 
diff --git a/pkgs/development/python-modules/z3c-checkversions/default.nix b/pkgs/development/python-modules/z3c-checkversions/default.nix
index f1af120d56eb6..8610306ea6f2f 100644
--- a/pkgs/development/python-modules/z3c-checkversions/default.nix
+++ b/pkgs/development/python-modules/z3c-checkversions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , python
diff --git a/pkgs/development/python-modules/zake/default.nix b/pkgs/development/python-modules/zake/default.nix
index 1d1d21a462ec5..89635a88f35ef 100644
--- a/pkgs/development/python-modules/zake/default.nix
+++ b/pkgs/development/python-modules/zake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , kazoo
diff --git a/pkgs/development/python-modules/zbaemon/default.nix b/pkgs/development/python-modules/zbaemon/default.nix
index 4e126074b184a..23eae31057fc1 100644
--- a/pkgs/development/python-modules/zbaemon/default.nix
+++ b/pkgs/development/python-modules/zbaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zbase32/default.nix b/pkgs/development/python-modules/zbase32/default.nix
index a4e7a476becae..715da719bbbc8 100644
--- a/pkgs/development/python-modules/zbase32/default.nix
+++ b/pkgs/development/python-modules/zbase32/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zc_lockfile/default.nix b/pkgs/development/python-modules/zc_lockfile/default.nix
index 3b75de3a24b6b..97289ec363006 100644
--- a/pkgs/development/python-modules/zc_lockfile/default.nix
+++ b/pkgs/development/python-modules/zc_lockfile/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , mock
 , zope_testing
-, lib, stdenv
+, lib
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zdaemon/default.nix b/pkgs/development/python-modules/zdaemon/default.nix
index 4e126074b184a..23eae31057fc1 100644
--- a/pkgs/development/python-modules/zdaemon/default.nix
+++ b/pkgs/development/python-modules/zdaemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zconfig
diff --git a/pkgs/development/python-modules/zerobin/default.nix b/pkgs/development/python-modules/zerobin/default.nix
index e120887566862..19d02a70496bb 100644
--- a/pkgs/development/python-modules/zerobin/default.nix
+++ b/pkgs/development/python-modules/zerobin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , cherrypy
diff --git a/pkgs/development/python-modules/zeroc-ice/default.nix b/pkgs/development/python-modules/zeroc-ice/default.nix
index f85674d68673b..6dccf51100e21 100644
--- a/pkgs/development/python-modules/zeroc-ice/default.nix
+++ b/pkgs/development/python-modules/zeroc-ice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, openssl, bzip2 }:
+{ lib, buildPythonPackage, fetchPypi, openssl, bzip2 }:
 
 buildPythonPackage rec {
   pname = "zeroc-ice";
diff --git a/pkgs/development/python-modules/zfec/default.nix b/pkgs/development/python-modules/zfec/default.nix
index 8a5aaf46b0e45..bcec7a0925115 100644
--- a/pkgs/development/python-modules/zfec/default.nix
+++ b/pkgs/development/python-modules/zfec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , setuptoolsDarcs
diff --git a/pkgs/development/python-modules/zict/default.nix b/pkgs/development/python-modules/zict/default.nix
index da36c1cba899e..611660fc3eb58 100644
--- a/pkgs/development/python-modules/zict/default.nix
+++ b/pkgs/development/python-modules/zict/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi
+{ lib, buildPythonPackage, fetchPypi
 , pytest, heapdict, pythonOlder }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zigpy-znp/default.nix b/pkgs/development/python-modules/zigpy-znp/default.nix
index 4de49cbc46b31..1a1c639a4738b 100644
--- a/pkgs/development/python-modules/zigpy-znp/default.nix
+++ b/pkgs/development/python-modules/zigpy-znp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , async-timeout
 , asynctest
 , buildPythonPackage
diff --git a/pkgs/development/python-modules/zodb/default.nix b/pkgs/development/python-modules/zodb/default.nix
index d48b9c4b95078..aa7cc6c97ebd7 100644
--- a/pkgs/development/python-modules/zodb/default.nix
+++ b/pkgs/development/python-modules/zodb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchPypi
 , buildPythonPackage
 , python
diff --git a/pkgs/development/python-modules/zope_broken/default.nix b/pkgs/development/python-modules/zope_broken/default.nix
index 899d7f3344be5..a3583654e6602 100644
--- a/pkgs/development/python-modules/zope_broken/default.nix
+++ b/pkgs/development/python-modules/zope_broken/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_component/default.nix b/pkgs/development/python-modules/zope_component/default.nix
index 6ea86b9b984d4..65556c9dc4172 100644
--- a/pkgs/development/python-modules/zope_component/default.nix
+++ b/pkgs/development/python-modules/zope_component/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope-deferredimport
diff --git a/pkgs/development/python-modules/zope_configuration/default.nix b/pkgs/development/python-modules/zope_configuration/default.nix
index e8d05b7767b34..e3ede9f94aff4 100644
--- a/pkgs/development/python-modules/zope_configuration/default.nix
+++ b/pkgs/development/python-modules/zope_configuration/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_contenttype/default.nix b/pkgs/development/python-modules/zope_contenttype/default.nix
index 6b66cca18aab5..15010d80a145b 100644
--- a/pkgs/development/python-modules/zope_contenttype/default.nix
+++ b/pkgs/development/python-modules/zope_contenttype/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testrunner
diff --git a/pkgs/development/python-modules/zope_deprecation/default.nix b/pkgs/development/python-modules/zope_deprecation/default.nix
index cda7af8e7a0c0..7eb66f7a9c576 100644
--- a/pkgs/development/python-modules/zope_deprecation/default.nix
+++ b/pkgs/development/python-modules/zope_deprecation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_testing
diff --git a/pkgs/development/python-modules/zope_dottedname/default.nix b/pkgs/development/python-modules/zope_dottedname/default.nix
index 0e8f35431364a..cbd5cd6d6539b 100644
--- a/pkgs/development/python-modules/zope_dottedname/default.nix
+++ b/pkgs/development/python-modules/zope_dottedname/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_event/default.nix b/pkgs/development/python-modules/zope_event/default.nix
index cc82da7ea9a19..2ebf6e017b5f4 100644
--- a/pkgs/development/python-modules/zope_event/default.nix
+++ b/pkgs/development/python-modules/zope_event/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 }:
diff --git a/pkgs/development/python-modules/zope_exceptions/default.nix b/pkgs/development/python-modules/zope_exceptions/default.nix
index 09f08c7bba482..0586227c61c54 100644
--- a/pkgs/development/python-modules/zope_exceptions/default.nix
+++ b/pkgs/development/python-modules/zope_exceptions/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_filerepresentation/default.nix b/pkgs/development/python-modules/zope_filerepresentation/default.nix
index 7aae2a24d6235..4792a09e26b2b 100644
--- a/pkgs/development/python-modules/zope_filerepresentation/default.nix
+++ b/pkgs/development/python-modules/zope_filerepresentation/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_schema
diff --git a/pkgs/development/python-modules/zope_i18nmessageid/default.nix b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
index 49270488ecdb4..1155adc83e9e3 100644
--- a/pkgs/development/python-modules/zope_i18nmessageid/default.nix
+++ b/pkgs/development/python-modules/zope_i18nmessageid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , six
diff --git a/pkgs/development/python-modules/zope_interface/default.nix b/pkgs/development/python-modules/zope_interface/default.nix
index 7a32045fc3e31..7b5d7abf682fb 100644
--- a/pkgs/development/python-modules/zope_interface/default.nix
+++ b/pkgs/development/python-modules/zope_interface/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_event
diff --git a/pkgs/development/python-modules/zope_lifecycleevent/default.nix b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
index 390624b50de75..809d8252cb2ef 100644
--- a/pkgs/development/python-modules/zope_lifecycleevent/default.nix
+++ b/pkgs/development/python-modules/zope_lifecycleevent/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPy3k
diff --git a/pkgs/development/python-modules/zope_location/default.nix b/pkgs/development/python-modules/zope_location/default.nix
index 62b2cef9ea75b..69fee2e338ff4 100644
--- a/pkgs/development/python-modules/zope_location/default.nix
+++ b/pkgs/development/python-modules/zope_location/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_proxy
diff --git a/pkgs/development/python-modules/zope_proxy/default.nix b/pkgs/development/python-modules/zope_proxy/default.nix
index af108c058c7f4..67e8a191d97a4 100644
--- a/pkgs/development/python-modules/zope_proxy/default.nix
+++ b/pkgs/development/python-modules/zope_proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zope_schema/default.nix b/pkgs/development/python-modules/zope_schema/default.nix
index c7e228c4e05be..75683cb2eb8f4 100644
--- a/pkgs/development/python-modules/zope_schema/default.nix
+++ b/pkgs/development/python-modules/zope_schema/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_location
diff --git a/pkgs/development/python-modules/zope_size/default.nix b/pkgs/development/python-modules/zope_size/default.nix
index 79eadc880a259..6945dddceaa3f 100644
--- a/pkgs/development/python-modules/zope_size/default.nix
+++ b/pkgs/development/python-modules/zope_size/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_i18nmessageid
diff --git a/pkgs/development/python-modules/zope_testing/default.nix b/pkgs/development/python-modules/zope_testing/default.nix
index 3d7cbf90c25f9..2f37f15453da2 100644
--- a/pkgs/development/python-modules/zope_testing/default.nix
+++ b/pkgs/development/python-modules/zope_testing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , isPyPy
diff --git a/pkgs/development/python-modules/zope_testrunner/default.nix b/pkgs/development/python-modules/zope_testrunner/default.nix
index c516106e48bbc..5ee42c8427534 100644
--- a/pkgs/development/python-modules/zope_testrunner/default.nix
+++ b/pkgs/development/python-modules/zope_testrunner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonPackage
 , fetchPypi
 , zope_interface
diff --git a/pkgs/development/python-modules/zstd/default.nix b/pkgs/development/python-modules/zstd/default.nix
index af7bb7692f66c..1d8fa8d93e9c8 100644
--- a/pkgs/development/python-modules/zstd/default.nix
+++ b/pkgs/development/python-modules/zstd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, fetchPypi, buildPythonPackage
+{ lib, pkg-config, fetchPypi, buildPythonPackage
 , buildPackages
 , zstd, pytest }:
 
diff --git a/pkgs/development/ruby-modules/bundler-app/default.nix b/pkgs/development/ruby-modules/bundler-app/default.nix
index 0859f08c2f7d7..03bf7275cc719 100644
--- a/pkgs/development/ruby-modules/bundler-app/default.nix
+++ b/pkgs/development/ruby-modules/bundler-app/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, runCommand, makeWrapper, ruby }@defs:
+{ lib, callPackage, runCommand, makeWrapper, ruby }@defs:
 
 # Use for simple installation of Ruby tools shipped in a Gem.
 # Start with a Gemfile that includes `gem <toolgem>`
diff --git a/pkgs/development/ruby-modules/testing/driver.nix b/pkgs/development/ruby-modules/testing/driver.nix
index 65e7c8d4416de..23a9a1cec543d 100644
--- a/pkgs/development/ruby-modules/testing/driver.nix
+++ b/pkgs/development/ruby-modules/testing/driver.nix
@@ -5,7 +5,7 @@ nix-build -E 'with import <nixpkgs> { }; callPackage ./test.nix {}' --show-trace
 Confusingly, the ideal result ends with something like:
 error: build of ‘/nix/store/3245f3dcl2wxjs4rci7n069zjlz8qg85-test-results.tap.drv’ failed
 */
-{ writeText, lib, callPackage, testFiles, stdenv, ruby }@defs:
+{ writeText, lib, callPackage, testFiles, ruby }@defs:
 let
   testTools = rec {
     test = import ./testing.nix;
diff --git a/pkgs/development/tools/ameba/default.nix b/pkgs/development/tools/ameba/default.nix
index f8cb744111612..9bfaab51554d3 100644
--- a/pkgs/development/tools/ameba/default.nix
+++ b/pkgs/development/tools/ameba/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, crystal }:
+{ lib, fetchFromGitHub, crystal }:
 
 crystal.buildCrystalPackage rec {
   pname = "ameba";
diff --git a/pkgs/development/tools/analysis/autoflake/default.nix b/pkgs/development/tools/analysis/autoflake/default.nix
index 884b511b8af1b..03e01aadb7167 100644
--- a/pkgs/development/tools/analysis/autoflake/default.nix
+++ b/pkgs/development/tools/analysis/autoflake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/analysis/bingrep/default.nix b/pkgs/development/tools/analysis/bingrep/default.nix
index ae54723dda3b0..338bc3e189c14 100644
--- a/pkgs/development/tools/analysis/bingrep/default.nix
+++ b/pkgs/development/tools/analysis/bingrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "bingrep";
diff --git a/pkgs/development/tools/analysis/checkov/default.nix b/pkgs/development/tools/analysis/checkov/default.nix
index 6277b1d4239e4..06c366529df3e 100644
--- a/pkgs/development/tools/analysis/checkov/default.nix
+++ b/pkgs/development/tools/analysis/checkov/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, lib, python3, fetchFromGitHub }:
+{ pkgs, lib, python3, fetchFromGitHub }:
 
 let
   pname = "checkov";
diff --git a/pkgs/development/tools/analysis/egypt/default.nix b/pkgs/development/tools/analysis/egypt/default.nix
index cfb974c86ddd8..0266502209913 100644
--- a/pkgs/development/tools/analysis/egypt/default.nix
+++ b/pkgs/development/tools/analysis/egypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "egypt";
diff --git a/pkgs/development/tools/analysis/evmdis/default.nix b/pkgs/development/tools/analysis/evmdis/default.nix
index b8f3aa0ac1fb4..4061090b1828b 100644
--- a/pkgs/development/tools/analysis/evmdis/default.nix
+++ b/pkgs/development/tools/analysis/evmdis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "evmdis-unstable";
diff --git a/pkgs/development/tools/analysis/hotspot/default.nix b/pkgs/development/tools/analysis/hotspot/default.nix
index 6ea079e3ec15b..94b440f58c8d5 100644
--- a/pkgs/development/tools/analysis/hotspot/default.nix
+++ b/pkgs/development/tools/analysis/hotspot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv,
+{ lib,
   mkDerivation,
   cmake,
   elfutils,
diff --git a/pkgs/development/tools/analysis/panopticon/default.nix b/pkgs/development/tools/analysis/panopticon/default.nix
index ff5014bd46a9e..0ef33270e92bf 100644
--- a/pkgs/development/tools/analysis/panopticon/default.nix
+++ b/pkgs/development/tools/analysis/panopticon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, qt5, git, cmake
+{ lib, fetchFromGitHub, rustPlatform, qt5, git, cmake
 , pkg-config, makeWrapper }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/analysis/snowman/default.nix b/pkgs/development/tools/analysis/snowman/default.nix
index 261645c062d30..870f084580b8f 100644
--- a/pkgs/development/tools/analysis/snowman/default.nix
+++ b/pkgs/development/tools/analysis/snowman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, boost, qtbase }:
 
 mkDerivation rec {
   pname = "snowman";
diff --git a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
index 17f3907146205..b879a6ef2374f 100644
--- a/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
+++ b/pkgs/development/tools/analysis/uefi-firmware-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/asn2quickder/default.nix b/pkgs/development/tools/asn2quickder/default.nix
index b2432f7fefc65..9ffcbb172d48b 100644
--- a/pkgs/development/tools/asn2quickder/default.nix
+++ b/pkgs/development/tools/asn2quickder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper, cmake
 , pytestrunner, pytest, six, pyparsing, asn1ate }:
 
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/async/default.nix b/pkgs/development/tools/async/default.nix
index 54e16cb6faafd..a45e93ab151ef 100644
--- a/pkgs/development/tools/async/default.nix
+++ b/pkgs/development/tools/async/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "async";
diff --git a/pkgs/development/tools/azcopy/default.nix b/pkgs/development/tools/azcopy/default.nix
index 822480b1d3f3f..98a6bcd5bbccc 100644
--- a/pkgs/development/tools/azcopy/default.nix
+++ b/pkgs/development/tools/azcopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "azure-storage-azcopy";
diff --git a/pkgs/development/tools/bazelisk/default.nix b/pkgs/development/tools/bazelisk/default.nix
index e4a6b3c2869e4..2cfde85f2248c 100644
--- a/pkgs/development/tools/bazelisk/default.nix
+++ b/pkgs/development/tools/bazelisk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "bazelisk";
diff --git a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
index ac03288f14850..80c949c1efbcf 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 , git
 , go
-, lib, stdenv
+, lib
 }:
 
 buildBazelPackage rec {
diff --git a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
index 436b681e00549..441254ce263c9 100644
--- a/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/buildtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "bazel-buildtools";
diff --git a/pkgs/development/tools/build-managers/fac/default.nix b/pkgs/development/tools/build-managers/fac/default.nix
index 25450ceb6d9b0..601f7ea9fea0a 100644
--- a/pkgs/development/tools/build-managers/fac/default.nix
+++ b/pkgs/development/tools/build-managers/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, git, fetchFromGitHub, rustPlatform }:
+{ lib, git, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fac-build";
diff --git a/pkgs/development/tools/build-managers/meson/default.nix b/pkgs/development/tools/build-managers/meson/default.nix
index 74d96d4af002f..7009aa4898fa0 100644
--- a/pkgs/development/tools/build-managers/meson/default.nix
+++ b/pkgs/development/tools/build-managers/meson/default.nix
@@ -1,6 +1,6 @@
 { lib
 , python3
-, stdenv
+
 , writeTextDir
 , substituteAll
 , fetchpatch
diff --git a/pkgs/development/tools/build-managers/pants/default.nix b/pkgs/development/tools/build-managers/pants/default.nix
index 03eac2db5e38e..53333c217ba53 100644
--- a/pkgs/development/tools/build-managers/pants/default.nix
+++ b/pkgs/development/tools/build-managers/pants/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages }:
+{ lib, pythonPackages }:
 
 with lib;
 with pythonPackages;
diff --git a/pkgs/development/tools/build-managers/scons/common.nix b/pkgs/development/tools/build-managers/scons/common.nix
index 1de2ecbbc8b85..63df4ccf7be75 100644
--- a/pkgs/development/tools/build-managers/scons/common.nix
+++ b/pkgs/development/tools/build-managers/scons/common.nix
@@ -1,6 +1,6 @@
 { version, sha256 }:
 
-{ stdenv, fetchurl, python3Packages, lib }:
+{ fetchurl, python3Packages, lib }:
 
 python3Packages.buildPythonApplication rec {
   pname = "scons";
diff --git a/pkgs/development/tools/build-managers/shards/default.nix b/pkgs/development/tools/build-managers/shards/default.nix
index 868ea265f6f4a..8cab1667b2188 100644
--- a/pkgs/development/tools/build-managers/shards/default.nix
+++ b/pkgs/development/tools/build-managers/shards/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , crystal_0_34
 , crystal_0_35
diff --git a/pkgs/development/tools/clog-cli/default.nix b/pkgs/development/tools/clog-cli/default.nix
index 182a7f98c4c2b..c3b477e3ea369 100644
--- a/pkgs/development/tools/clog-cli/default.nix
+++ b/pkgs/development/tools/clog-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/compile-daemon/default.nix b/pkgs/development/tools/compile-daemon/default.nix
index ef08b2d581343..a12fb4424e8e4 100644
--- a/pkgs/development/tools/compile-daemon/default.nix
+++ b/pkgs/development/tools/compile-daemon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "compile-daemon-unstable";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
index bd8608a91197e..ed1171458b106 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, buildGoModule,
+{ fetchFromGitHub, lib, buildGoModule,
   makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep }:
 buildGoModule rec {
   name = "buildkite-agent-${version}";
diff --git a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
index 232efe32a1a8d..64ca730d7dc04 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
+{ buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
 , src, version, hasBootstrapScript, postPatch ? ""
 , ... }:
 let
diff --git a/pkgs/development/tools/continuous-integration/drone-cli/default.nix b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
index b1ee5349a5c1e..6c9cffe41b20b 100644
--- a/pkgs/development/tools/continuous-integration/drone-cli/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 let version = "1.2.4";
 in buildGoModule rec {
diff --git a/pkgs/development/tools/continuous-integration/drone/default.nix b/pkgs/development/tools/continuous-integration/drone/default.nix
index ffdf588895aa4..c6d609e38cf10 100644
--- a/pkgs/development/tools/continuous-integration/drone/default.nix
+++ b/pkgs/development/tools/continuous-integration/drone/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   name = "drone.io-${version}";
diff --git a/pkgs/development/tools/corgi/default.nix b/pkgs/development/tools/corgi/default.nix
index a7698ef4fb8e5..e39e42c40af56 100644
--- a/pkgs/development/tools/corgi/default.nix
+++ b/pkgs/development/tools/corgi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "corgi-${rev}";
diff --git a/pkgs/development/tools/cppclean/default.nix b/pkgs/development/tools/cppclean/default.nix
index 4e00eb903ebe7..460d7cddb83d8 100644
--- a/pkgs/development/tools/cppclean/default.nix
+++ b/pkgs/development/tools/cppclean/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/development/tools/cue/default.nix b/pkgs/development/tools/cue/default.nix
index 243be958b07d0..28660732ea4f1 100644
--- a/pkgs/development/tools/cue/default.nix
+++ b/pkgs/development/tools/cue/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchgit, lib, stdenv }:
+{ buildGoModule, fetchgit, lib }:
 
 buildGoModule rec {
   pname = "cue";
diff --git a/pkgs/development/tools/dapr/cli/default.nix b/pkgs/development/tools/dapr/cli/default.nix
index 7a8243ece25da..57fd984dc17c7 100644
--- a/pkgs/development/tools/dapr/cli/default.nix
+++ b/pkgs/development/tools/dapr/cli/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv }:
+{ buildGoModule, fetchFromGitHub, lib }:
 
 let
   pname = "dapr";
diff --git a/pkgs/development/tools/database/dbmate/default.nix b/pkgs/development/tools/database/dbmate/default.nix
index 9c01c1e9d2d12..6634c2b6384da 100644
--- a/pkgs/development/tools/database/dbmate/default.nix
+++ b/pkgs/development/tools/database/dbmate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dbmate";
diff --git a/pkgs/development/tools/database/pyrseas/default.nix b/pkgs/development/tools/database/pyrseas/default.nix
index 119aa2eb8f81d..075cd5053beb6 100644
--- a/pkgs/development/tools/database/pyrseas/default.nix
+++ b/pkgs/development/tools/database/pyrseas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   pgdbconn = pythonPackages.buildPythonPackage {
diff --git a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
index 2b8a6f7cca02c..42c2a55fd3ebf 100644
--- a/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
+++ b/pkgs/development/tools/database/timescaledb-parallel-copy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-parallel-copy";
diff --git a/pkgs/development/tools/database/timescaledb-tune/default.nix b/pkgs/development/tools/database/timescaledb-tune/default.nix
index cec374ccb3a92..34d5d12607f74 100644
--- a/pkgs/development/tools/database/timescaledb-tune/default.nix
+++ b/pkgs/development/tools/database/timescaledb-tune/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "timescaledb-tune";
diff --git a/pkgs/development/tools/deis/default.nix b/pkgs/development/tools/deis/default.nix
index c8e20d42063f8..8286435d9a3ae 100644
--- a/pkgs/development/tools/deis/default.nix
+++ b/pkgs/development/tools/deis/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/deisctl/default.nix b/pkgs/development/tools/deisctl/default.nix
index 0f5df40d92c70..67245a5ebbe70 100644
--- a/pkgs/development/tools/deisctl/default.nix
+++ b/pkgs/development/tools/deisctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "deis";
diff --git a/pkgs/development/tools/delve/default.nix b/pkgs/development/tools/delve/default.nix
index 62fb32c851631..bd8f2484b33d5 100644
--- a/pkgs/development/tools/delve/default.nix
+++ b/pkgs/development/tools/delve/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "delve";
diff --git a/pkgs/development/tools/dep/default.nix b/pkgs/development/tools/dep/default.nix
index ff7f370b0d44c..ff7bad87afd64 100644
--- a/pkgs/development/tools/dep/default.nix
+++ b/pkgs/development/tools/dep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dep";
diff --git a/pkgs/development/tools/dep2nix/default.nix b/pkgs/development/tools/dep2nix/default.nix
index daa68b1b93113..5d98ecd572962 100644
--- a/pkgs/development/tools/dep2nix/default.nix
+++ b/pkgs/development/tools/dep2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage
+{ lib, fetchFromGitHub, buildGoPackage
 , makeWrapper, nix-prefetch-scripts }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/devd/default.nix b/pkgs/development/tools/devd/default.nix
index 32f29f7e128cd..0789850a49453 100644
--- a/pkgs/development/tools/devd/default.nix
+++ b/pkgs/development/tools/devd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "devd";
diff --git a/pkgs/development/tools/devpi-client/default.nix b/pkgs/development/tools/devpi-client/default.nix
index 766f3f2b7292c..5905e05d07109 100644
--- a/pkgs/development/tools/devpi-client/default.nix
+++ b/pkgs/development/tools/devpi-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 # buildInputs
diff --git a/pkgs/development/tools/devpi-server/default.nix b/pkgs/development/tools/devpi-server/default.nix
index 3d8cb16bb4785..8a484a23349c2 100644
--- a/pkgs/development/tools/devpi-server/default.nix
+++ b/pkgs/development/tools/devpi-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, nginx }:
+{ lib, fetchFromGitHub, python3Packages, nginx }:
 
 python3Packages.buildPythonApplication rec {
   pname = "devpi-server";
diff --git a/pkgs/development/tools/documentation/antora/default.nix b/pkgs/development/tools/documentation/antora/default.nix
index d553df59446a2..ea8aeb83c8cdf 100644
--- a/pkgs/development/tools/documentation/antora/default.nix
+++ b/pkgs/development/tools/documentation/antora/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nodePackages }:
+{ lib, nodePackages }:
 
 let
   linkNodeDeps = ({ pkg, deps, name ? "" }:
diff --git a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
index 2e04d3dd365e9..d031145a9977f 100644
--- a/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
+++ b/pkgs/development/tools/documentation/gnome-doc-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
+{ lib, fetchurl, pkg-config, libxml2Python, libxslt, intltool, gnome3
 , python2Packages }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/development/tools/documentation/gtk-doc/default.nix b/pkgs/development/tools/documentation/gtk-doc/default.nix
index b1ea6a0634b5a..d82c288e5aad4 100644
--- a/pkgs/development/tools/documentation/gtk-doc/default.nix
+++ b/pkgs/development/tools/documentation/gtk-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , meson
 , ninja
diff --git a/pkgs/development/tools/documentation/mdsh/default.nix b/pkgs/development/tools/documentation/mdsh/default.nix
index d2e555a4550d0..c8e6cafa27af8 100644
--- a/pkgs/development/tools/documentation/mdsh/default.nix
+++ b/pkgs/development/tools/documentation/mdsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "mdsh";
diff --git a/pkgs/development/tools/documentation/mkdocs/default.nix b/pkgs/development/tools/documentation/mkdocs/default.nix
index bee22856eb10e..64d834f1bb295 100644
--- a/pkgs/development/tools/documentation/mkdocs/default.nix
+++ b/pkgs/development/tools/documentation/mkdocs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/easyjson/default.nix b/pkgs/development/tools/easyjson/default.nix
index a458f0dbfcebb..75bfc1d4c14f9 100644
--- a/pkgs/development/tools/easyjson/default.nix
+++ b/pkgs/development/tools/easyjson/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "easyjson";
diff --git a/pkgs/development/tools/eliot-tree/default.nix b/pkgs/development/tools/eliot-tree/default.nix
index e60642c5fe607..adcedfe643c58 100644
--- a/pkgs/development/tools/eliot-tree/default.nix
+++ b/pkgs/development/tools/eliot-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "eliot-tree";
diff --git a/pkgs/development/tools/fac/default.nix b/pkgs/development/tools/fac/default.nix
index ef3298c54780c..c50fd834e031d 100644
--- a/pkgs/development/tools/fac/default.nix
+++ b/pkgs/development/tools/fac/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, git }:
 
 buildGoPackage rec {
   pname = "fac";
diff --git a/pkgs/development/tools/fedpkg/default.nix b/pkgs/development/tools/fedpkg/default.nix
index 285e71707fd51..d9633e88f346c 100644
--- a/pkgs/development/tools/fedpkg/default.nix
+++ b/pkgs/development/tools/fedpkg/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
+{ lib, buildPythonApplication, buildPythonPackage, isPy3k, fetchurl, rpkg, offtrac, urlgrabber, pyopenssl, python_fedora }:
 
 let
   fedora_cert = buildPythonPackage rec {
diff --git a/pkgs/development/tools/flootty/default.nix b/pkgs/development/tools/flootty/default.nix
index 4867b9c2cb992..e4f76ca9f6af5 100644
--- a/pkgs/development/tools/flootty/default.nix
+++ b/pkgs/development/tools/flootty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "Flootty";
diff --git a/pkgs/development/tools/gauge/default.nix b/pkgs/development/tools/gauge/default.nix
index a0eb7370bee0f..168910da06f5b 100644
--- a/pkgs/development/tools/gauge/default.nix
+++ b/pkgs/development/tools/gauge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gauge";
diff --git a/pkgs/development/tools/gdm/default.nix b/pkgs/development/tools/gdm/default.nix
index 7c7f73af1e0fd..7ecb7895d2f9d 100644
--- a/pkgs/development/tools/gdm/default.nix
+++ b/pkgs/development/tools/gdm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gdm";
diff --git a/pkgs/development/tools/ginkgo/default.nix b/pkgs/development/tools/ginkgo/default.nix
index b65e7c6a5eef4..05db94c7f1e8c 100644
--- a/pkgs/development/tools/ginkgo/default.nix
+++ b/pkgs/development/tools/ginkgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ginkgo";
diff --git a/pkgs/development/tools/gir/default.nix b/pkgs/development/tools/gir/default.nix
index 8f38b41f7ae2c..c88ffef4df122 100644
--- a/pkgs/development/tools/gir/default.nix
+++ b/pkgs/development/tools/gir/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gir";
diff --git a/pkgs/development/tools/git-series/default.nix b/pkgs/development/tools/git-series/default.nix
index 4f13c3de40bb9..0f7677c7aa26d 100644
--- a/pkgs/development/tools/git-series/default.nix
+++ b/pkgs/development/tools/git-series/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, rustPlatform
+{ lib, fetchFromGitHub, fetchpatch, rustPlatform
 , openssl, cmake, perl, pkg-config, zlib, curl, libgit2, libssh2
 }:
 
diff --git a/pkgs/development/tools/github/cligh/default.nix b/pkgs/development/tools/github/cligh/default.nix
index dfe66c789ca48..ce340239ac4cc 100644
--- a/pkgs/development/tools/github/cligh/default.nix
+++ b/pkgs/development/tools/github/cligh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
+{ lib, fetchFromGitHub, buildPythonApplication, pyxdg, PyGithub }:
 
 buildPythonApplication rec {
   pname = "cligh";
diff --git a/pkgs/development/tools/glide/default.nix b/pkgs/development/tools/glide/default.nix
index f8abde7e00a7a..05e4ae8106122 100644
--- a/pkgs/development/tools/glide/default.nix
+++ b/pkgs/development/tools/glide/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glide";
diff --git a/pkgs/development/tools/gllvm/default.nix b/pkgs/development/tools/gllvm/default.nix
index f2c552252fb2c..78038440a96da 100644
--- a/pkgs/development/tools/gllvm/default.nix
+++ b/pkgs/development/tools/gllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gllvm";
diff --git a/pkgs/development/tools/glock/default.nix b/pkgs/development/tools/glock/default.nix
index c00478c9fb6a4..b2d1e09e74f37 100644
--- a/pkgs/development/tools/glock/default.nix
+++ b/pkgs/development/tools/glock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "glock";
diff --git a/pkgs/development/tools/go-bindata-assetfs/default.nix b/pkgs/development/tools/go-bindata-assetfs/default.nix
index 57d0e93a9b0c9..5131436e02484 100644
--- a/pkgs/development/tools/go-bindata-assetfs/default.nix
+++ b/pkgs/development/tools/go-bindata-assetfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-bindata-assetfs";
diff --git a/pkgs/development/tools/go-bindata/default.nix b/pkgs/development/tools/go-bindata/default.nix
index 5d257bbf99827..3b73c52731592 100644
--- a/pkgs/development/tools/go-bindata/default.nix
+++ b/pkgs/development/tools/go-bindata/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "go-bindata";
diff --git a/pkgs/development/tools/go-junit-report/default.nix b/pkgs/development/tools/go-junit-report/default.nix
index f1e822e3633fb..110cdbfabc9f8 100644
--- a/pkgs/development/tools/go-junit-report/default.nix
+++ b/pkgs/development/tools/go-junit-report/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-junit-report-unstable";
diff --git a/pkgs/development/tools/go-langserver/default.nix b/pkgs/development/tools/go-langserver/default.nix
index fdefd6b0178bf..ac6034dffa42d 100644
--- a/pkgs/development/tools/go-langserver/default.nix
+++ b/pkgs/development/tools/go-langserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-langserver";
diff --git a/pkgs/development/tools/go-migrate/default.nix b/pkgs/development/tools/go-migrate/default.nix
index 1786bfe5f0f96..d07e3cd80d32c 100644
--- a/pkgs/development/tools/go-migrate/default.nix
+++ b/pkgs/development/tools/go-migrate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-migrate";
diff --git a/pkgs/development/tools/go-outline/default.nix b/pkgs/development/tools/go-outline/default.nix
index d30d5c30f3a1d..fe4c2e8d4dfd4 100644
--- a/pkgs/development/tools/go-outline/default.nix
+++ b/pkgs/development/tools/go-outline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-outline";
diff --git a/pkgs/development/tools/go-protobuf/default.nix b/pkgs/development/tools/go-protobuf/default.nix
index 0187552d84456..1fa027ae72b9b 100644
--- a/pkgs/development/tools/go-protobuf/default.nix
+++ b/pkgs/development/tools/go-protobuf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go-protobuf";
diff --git a/pkgs/development/tools/go-repo-root/default.nix b/pkgs/development/tools/go-repo-root/default.nix
index 25fc87f8985dc..b7653aa144e43 100644
--- a/pkgs/development/tools/go-repo-root/default.nix
+++ b/pkgs/development/tools/go-repo-root/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "go-repo-root";
diff --git a/pkgs/development/tools/go-symbols/default.nix b/pkgs/development/tools/go-symbols/default.nix
index 3f41007716e79..a259b768561b4 100644
--- a/pkgs/development/tools/go-symbols/default.nix
+++ b/pkgs/development/tools/go-symbols/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-symbols";
diff --git a/pkgs/development/tools/go2nix/default.nix b/pkgs/development/tools/go2nix/default.nix
index bcd1f56f52569..b5a224cb5ae7f 100644
--- a/pkgs/development/tools/go2nix/default.nix
+++ b/pkgs/development/tools/go2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
+{ lib, buildGoPackage, go-bindata, gotools, nix-prefetch-git, git, makeWrapper,
   fetchFromGitHub }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/goa/default.nix b/pkgs/development/tools/goa/default.nix
index 63322b6d3639c..56b47bd8c6010 100644
--- a/pkgs/development/tools/goa/default.nix
+++ b/pkgs/development/tools/goa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goa";
diff --git a/pkgs/development/tools/gocode-gomod/default.nix b/pkgs/development/tools/gocode-gomod/default.nix
index 995bd3102cc04..f610b19d79b93 100644
--- a/pkgs/development/tools/gocode-gomod/default.nix
+++ b/pkgs/development/tools/gocode-gomod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gocode-gomod";
diff --git a/pkgs/development/tools/gocode/default.nix b/pkgs/development/tools/gocode/default.nix
index 9bed4073b2b3f..be9f70da9341f 100644
--- a/pkgs/development/tools/gocode/default.nix
+++ b/pkgs/development/tools/gocode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gocode-unstable";
diff --git a/pkgs/development/tools/goconvey/default.nix b/pkgs/development/tools/goconvey/default.nix
index dcec045e5ebc5..fb6ce653cc4bc 100644
--- a/pkgs/development/tools/goconvey/default.nix
+++ b/pkgs/development/tools/goconvey/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goconvey";
diff --git a/pkgs/development/tools/godef/default.nix b/pkgs/development/tools/godef/default.nix
index 6d4f40ba6bcab..99fe932013e7d 100644
--- a/pkgs/development/tools/godef/default.nix
+++ b/pkgs/development/tools/godef/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "godef";
diff --git a/pkgs/development/tools/godot/headless.nix b/pkgs/development/tools/godot/headless.nix
index 20d3b48f2fd5f..a8d640eba1aa8 100644
--- a/pkgs/development/tools/godot/headless.nix
+++ b/pkgs/development/tools/godot/headless.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-headless";
   sconsFlags = "target=release_debug platform=server tools=yes";
diff --git a/pkgs/development/tools/godot/server.nix b/pkgs/development/tools/godot/server.nix
index 6ce347355e3be..4254dc746b66c 100644
--- a/pkgs/development/tools/godot/server.nix
+++ b/pkgs/development/tools/godot/server.nix
@@ -1,4 +1,4 @@
-{ godot, lib, stdenv }:
+{ godot, lib }:
 godot.overrideAttrs (oldAttrs: rec {
   pname = "godot-server";
   sconsFlags = "target=release platform=server tools=no";
diff --git a/pkgs/development/tools/gojsontoyaml/default.nix b/pkgs/development/tools/gojsontoyaml/default.nix
index 0f772134a0e2a..0fd45598a837c 100644
--- a/pkgs/development/tools/gojsontoyaml/default.nix
+++ b/pkgs/development/tools/gojsontoyaml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gojsontoyaml";
diff --git a/pkgs/development/tools/golint/default.nix b/pkgs/development/tools/golint/default.nix
index 1f75384f33873..89b9f1464950f 100644
--- a/pkgs/development/tools/golint/default.nix
+++ b/pkgs/development/tools/golint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "lint";
diff --git a/pkgs/development/tools/gomodifytags/default.nix b/pkgs/development/tools/gomodifytags/default.nix
index 650f1b89f30e2..254113f21064d 100644
--- a/pkgs/development/tools/gomodifytags/default.nix
+++ b/pkgs/development/tools/gomodifytags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomodifytags";
diff --git a/pkgs/development/tools/gomplate/default.nix b/pkgs/development/tools/gomplate/default.nix
index f8d6553f74d8e..0f2c955817435 100644
--- a/pkgs/development/tools/gomplate/default.nix
+++ b/pkgs/development/tools/gomplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gomplate";
diff --git a/pkgs/development/tools/gopkgs/default.nix b/pkgs/development/tools/gopkgs/default.nix
index e4a72cb27a173..a5413c6a9c05c 100644
--- a/pkgs/development/tools/gopkgs/default.nix
+++ b/pkgs/development/tools/gopkgs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gopkgs";
diff --git a/pkgs/development/tools/gopls/default.nix b/pkgs/development/tools/gopls/default.nix
index 7a7c98e28940f..1617900acee70 100644
--- a/pkgs/development/tools/gopls/default.nix
+++ b/pkgs/development/tools/gopls/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gopls";
diff --git a/pkgs/development/tools/gore/default.nix b/pkgs/development/tools/gore/default.nix
index 30d7cd1ef3368..43bb2d2aad7b6 100644
--- a/pkgs/development/tools/gore/default.nix
+++ b/pkgs/development/tools/gore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gore";
diff --git a/pkgs/development/tools/gosec/default.nix b/pkgs/development/tools/gosec/default.nix
index 69d74496e6156..1ebb6e71713c5 100644
--- a/pkgs/development/tools/gosec/default.nix
+++ b/pkgs/development/tools/gosec/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gosec";
diff --git a/pkgs/development/tools/gotags/default.nix b/pkgs/development/tools/gotags/default.nix
index ea40bd0e6fe10..274f7a476c2be 100644
--- a/pkgs/development/tools/gotags/default.nix
+++ b/pkgs/development/tools/gotags/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gotags";
diff --git a/pkgs/development/tools/gotests/default.nix b/pkgs/development/tools/gotests/default.nix
index 87a93abee8efb..faa2e60aca40a 100644
--- a/pkgs/development/tools/gotests/default.nix
+++ b/pkgs/development/tools/gotests/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotests";
diff --git a/pkgs/development/tools/gotestsum/default.nix b/pkgs/development/tools/gotestsum/default.nix
index ece194f00030a..435edd61623bf 100644
--- a/pkgs/development/tools/gotestsum/default.nix
+++ b/pkgs/development/tools/gotestsum/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "gotestsum";
diff --git a/pkgs/development/tools/gotools/default.nix b/pkgs/development/tools/gotools/default.nix
index 7ca3486a503a1..285d546d74214 100644
--- a/pkgs/development/tools/gotools/default.nix
+++ b/pkgs/development/tools/gotools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit }:
+{ lib, buildGoModule, fetchgit }:
 
 buildGoModule rec {
   pname = "gotools-unstable";
diff --git a/pkgs/development/tools/govendor/default.nix b/pkgs/development/tools/govendor/default.nix
index edd9b577be4c1..b24afebb3aa37 100644
--- a/pkgs/development/tools/govendor/default.nix
+++ b/pkgs/development/tools/govendor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "govendor";
diff --git a/pkgs/development/tools/govers/default.nix b/pkgs/development/tools/govers/default.nix
index cac76daa6fc3e..5e2d89cfd5df7 100644
--- a/pkgs/development/tools/govers/default.nix
+++ b/pkgs/development/tools/govers/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "govers";
diff --git a/pkgs/development/tools/gox/default.nix b/pkgs/development/tools/gox/default.nix
index 3deb73acb4419..4aa7a314c8767 100644
--- a/pkgs/development/tools/gox/default.nix
+++ b/pkgs/development/tools/gox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gox";
diff --git a/pkgs/development/tools/gron/default.nix b/pkgs/development/tools/gron/default.nix
index 6d182b0b5f505..f486bc95bc175 100644
--- a/pkgs/development/tools/gron/default.nix
+++ b/pkgs/development/tools/gron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gron";
diff --git a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
index 02c4c96bd8e7f..b857b910f0a51 100644
--- a/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
+++ b/pkgs/development/tools/haskell/dconf2nix/dconf2nix.nix
@@ -1,5 +1,5 @@
 { mkDerivation, base, containers, fetchgit, hedgehog
-, optparse-applicative, parsec, lib, stdenv, template-haskell, text
+, optparse-applicative, parsec, lib, template-haskell, text
 }:
 mkDerivation {
   pname = "dconf2nix";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/default.nix b/pkgs/development/tools/haskell/haskell-language-server/default.nix
index 512aec84eead2..71b6355db58db 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/default.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/default.nix
@@ -7,7 +7,7 @@
 , hls-tactics-plugin, hslogger, hspec, hspec-core
 , hspec-expectations, lens, lsp-test, mtl, optparse-applicative
 , optparse-simple, ormolu, process, regex-tdfa, safe-exceptions
-, shake, lib, stdenv, stm, stylish-haskell, tasty, tasty-ant-xml
+, shake, lib, stm, stylish-haskell, tasty, tasty-ant-xml
 , tasty-expected-failure, tasty-golden, tasty-hunit, tasty-rerun
 , temporary, text, transformers, unordered-containers, with-utf8
 , yaml
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
index c51689343903c..b757dc8c9e867 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-class-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, fetchgit, ghc
 , ghc-exactprint, ghcide, haskell-lsp, hls-plugin-api, lens, shake
-, lib, stdenv, text, transformers, unordered-containers
+, lib, text, transformers, unordered-containers
 }:
 mkDerivation {
   pname = "hls-class-plugin";
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
index b5774ddcbfd3d..2677b45a591d3 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-eval-plugin.nix
@@ -2,7 +2,7 @@
 , extra, fetchgit, filepath, ghc, ghc-boot-th, ghc-paths, ghcide
 , hashable, haskell-lsp, haskell-lsp-types, hls-plugin-api
 , parser-combinators, pretty-simple, QuickCheck, safe-exceptions
-, shake, lib, stdenv, temporary, text, time, transformers
+, shake, lib, temporary, text, time, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
index 1c7d31004b6a6..8207b5181ba17 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-explicit-imports-plugin.nix
@@ -1,5 +1,5 @@
 { mkDerivation, aeson, base, containers, deepseq, fetchgit, ghc
-, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, stdenv, text
+, ghcide, haskell-lsp-types, hls-plugin-api, shake, lib, text
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
index 4a90933d1e7f7..02e314cba3a17 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-hlint-plugin.nix
@@ -2,7 +2,7 @@
 , containers, data-default, deepseq, Diff, directory, extra
 , fetchgit, filepath, ghc, ghc-lib, ghc-lib-parser-ex, ghcide
 , hashable, haskell-lsp, hlint, hls-plugin-api, hslogger, lens
-, regex-tdfa, shake, lib, stdenv, temporary, text, transformers
+, regex-tdfa, shake, lib, temporary, text, transformers
 , unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
index 311a26633a5c0..cca8acb8819e6 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-retrie-plugin.nix
@@ -1,6 +1,6 @@
 { mkDerivation, aeson, base, containers, deepseq, directory, extra
 , fetchgit, ghc, ghcide, hashable, haskell-lsp, haskell-lsp-types
-, hls-plugin-api, retrie, safe-exceptions, shake, lib, stdenv, text
+, hls-plugin-api, retrie, safe-exceptions, shake, lib, text
 , transformers, unordered-containers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
index 4f476431d9b79..369ce0e27b86d 100644
--- a/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
+++ b/pkgs/development/tools/haskell/haskell-language-server/hls-tactics-plugin.nix
@@ -2,7 +2,7 @@
 , directory, extra, fetchgit, filepath, fingertree, generic-lens
 , ghc, ghc-boot-th, ghc-exactprint, ghc-source-gen, ghcide
 , haskell-lsp, hie-bios, hls-plugin-api, hspec, hspec-discover
-, lens, mtl, QuickCheck, refinery, retrie, shake, lib, stdenv, syb, text
+, lens, mtl, QuickCheck, refinery, retrie, shake, lib, syb, text
 , transformers
 }:
 mkDerivation {
diff --git a/pkgs/development/tools/haskell/vaultenv/default.nix b/pkgs/development/tools/haskell/vaultenv/default.nix
index 42cf33224201b..8c817e8eeef0f 100644
--- a/pkgs/development/tools/haskell/vaultenv/default.nix
+++ b/pkgs/development/tools/haskell/vaultenv/default.nix
@@ -1,7 +1,7 @@
 { mkDerivation, async, base, bytestring, connection, containers
 , directory, hpack, hspec, hspec-discover, hspec-expectations
 , http-client, http-conduit, lens, lens-aeson, megaparsec, mtl
-, optparse-applicative, parser-combinators, retry, lib, stdenv, text
+, optparse-applicative, parser-combinators, retry, lib, text
 , unix, unordered-containers, utf8-string, fetchzip, dotenv
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/hcloud/default.nix b/pkgs/development/tools/hcloud/default.nix
index 5c4fe48f60fb4..3e6ef4d4d342a 100644
--- a/pkgs/development/tools/hcloud/default.nix
+++ b/pkgs/development/tools/hcloud/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "hcloud";
diff --git a/pkgs/development/tools/icr/default.nix b/pkgs/development/tools/icr/default.nix
index ca052c0f210aa..11e52f77cb80b 100644
--- a/pkgs/development/tools/icr/default.nix
+++ b/pkgs/development/tools/icr/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , fetchFromGitHub
 , crystal
 , shards
diff --git a/pkgs/development/tools/jd/default.nix b/pkgs/development/tools/jd/default.nix
index 772e2802ff579..96d2807b9ab9f 100644
--- a/pkgs/development/tools/jd/default.nix
+++ b/pkgs/development/tools/jd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "jd";
diff --git a/pkgs/development/tools/jid/default.nix b/pkgs/development/tools/jid/default.nix
index 5e4e3df694274..b48de54dd22e3 100644
--- a/pkgs/development/tools/jid/default.nix
+++ b/pkgs/development/tools/jid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jid";
diff --git a/pkgs/development/tools/jira_cli/default.nix b/pkgs/development/tools/jira_cli/default.nix
index 7b7647da033ee..cf15a61477e4a 100644
--- a/pkgs/development/tools/jira_cli/default.nix
+++ b/pkgs/development/tools/jira_cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, libffi, openssl, python3Packages }:
+{ lib, libffi, openssl, python3Packages }:
 let
   inherit (python3Packages) fetchPypi buildPythonApplication vcrpy mock hiro;
 in
diff --git a/pkgs/development/tools/jl/default.nix b/pkgs/development/tools/jl/default.nix
index e0bf896c149ff..15347432f70e9 100644
--- a/pkgs/development/tools/jl/default.nix
+++ b/pkgs/development/tools/jl/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, fetchFromGitHub, fetchpatch
 , aeson, aeson-pretty, attoparsec, base, bytestring, conduit, conduit-extra
-, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib, stdenv
+, containers, exceptions, mtl, optparse-simple, parsec, scientific, lib
 , text, unordered-containers, vector
 }:
 mkDerivation rec {
diff --git a/pkgs/development/tools/jmespath/default.nix b/pkgs/development/tools/jmespath/default.nix
index f5a7092e60f92..5abbf71e7f412 100644
--- a/pkgs/development/tools/jmespath/default.nix
+++ b/pkgs/development/tools/jmespath/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jmespath";
diff --git a/pkgs/development/tools/jp/default.nix b/pkgs/development/tools/jp/default.nix
index d8d703feed30c..f1f5b37c10dcf 100644
--- a/pkgs/development/tools/jp/default.nix
+++ b/pkgs/development/tools/jp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "jp";
diff --git a/pkgs/development/tools/just/default.nix b/pkgs/development/tools/just/default.nix
index bbdd1bd016d5b..e96d8f38af4ee 100644
--- a/pkgs/development/tools/just/default.nix
+++ b/pkgs/development/tools/just/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils, bash, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "just";
diff --git a/pkgs/development/tools/k6/default.nix b/pkgs/development/tools/k6/default.nix
index 6a8fe4caf01b3..6a94d40c2062d 100644
--- a/pkgs/development/tools/k6/default.nix
+++ b/pkgs/development/tools/k6/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "k6";
diff --git a/pkgs/development/tools/kcli/default.nix b/pkgs/development/tools/kcli/default.nix
index 6c9f62c6f72d9..9cd1c976162f1 100644
--- a/pkgs/development/tools/kcli/default.nix
+++ b/pkgs/development/tools/kcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kcli";
diff --git a/pkgs/development/tools/kind/default.nix b/pkgs/development/tools/kind/default.nix
index 3fff2aae1f4dc..47b23ae2342d8 100644
--- a/pkgs/development/tools/kind/default.nix
+++ b/pkgs/development/tools/kind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 with lib;
 
diff --git a/pkgs/development/tools/krew/default.nix b/pkgs/development/tools/krew/default.nix
index 7449d6df38ebb..f2a4f390f82c6 100644
--- a/pkgs/development/tools/krew/default.nix
+++ b/pkgs/development/tools/krew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "krew";
diff --git a/pkgs/development/tools/kubectx/default.nix b/pkgs/development/tools/kubectx/default.nix
index f2186709e8352..4695585533237 100644
--- a/pkgs/development/tools/kubectx/default.nix
+++ b/pkgs/development/tools/kubectx/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "kubectx";
diff --git a/pkgs/development/tools/kubeprompt/default.nix b/pkgs/development/tools/kubeprompt/default.nix
index 4fc8f3253429d..39cd59cbec6ca 100644
--- a/pkgs/development/tools/kubeprompt/default.nix
+++ b/pkgs/development/tools/kubeprompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kubeprompt";
diff --git a/pkgs/development/tools/kubicorn/default.nix b/pkgs/development/tools/kubicorn/default.nix
index f0985277a25e8..706b91aad251c 100644
--- a/pkgs/development/tools/kubicorn/default.nix
+++ b/pkgs/development/tools/kubicorn/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 with lib;
 
diff --git a/pkgs/development/tools/lazygit/default.nix b/pkgs/development/tools/lazygit/default.nix
index 1e8ebb0d08797..a2707eb72e99e 100644
--- a/pkgs/development/tools/lazygit/default.nix
+++ b/pkgs/development/tools/lazygit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lazygit";
diff --git a/pkgs/development/tools/leaps/default.nix b/pkgs/development/tools/leaps/default.nix
index e68542e584f28..934881b6781c4 100644
--- a/pkgs/development/tools/leaps/default.nix
+++ b/pkgs/development/tools/leaps/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "leaps";
diff --git a/pkgs/development/tools/manul/default.nix b/pkgs/development/tools/manul/default.nix
index 4265c2a745014..306c9143c5c6c 100644
--- a/pkgs/development/tools/manul/default.nix
+++ b/pkgs/development/tools/manul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   name = "manul-unstable-2016-09-30";
diff --git a/pkgs/development/tools/misc/circleci-cli/default.nix b/pkgs/development/tools/misc/circleci-cli/default.nix
index 73ea64f1d62cb..140e4869e88a9 100644
--- a/pkgs/development/tools/misc/circleci-cli/default.nix
+++ b/pkgs/development/tools/misc/circleci-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "circleci-cli";
diff --git a/pkgs/development/tools/misc/d-feet/default.nix b/pkgs/development/tools/misc/d-feet/default.nix
index 60d3c5c453945..5c130a99c9267 100644
--- a/pkgs/development/tools/misc/d-feet/default.nix
+++ b/pkgs/development/tools/misc/d-feet/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , pkg-config
 , fetchurl
 , meson
diff --git a/pkgs/development/tools/misc/docopts/default.nix b/pkgs/development/tools/misc/docopts/default.nix
index 3614270574e4f..74450bdfe7377 100644
--- a/pkgs/development/tools/misc/docopts/default.nix
+++ b/pkgs/development/tools/misc/docopts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docopts";
diff --git a/pkgs/development/tools/misc/elfinfo/default.nix b/pkgs/development/tools/misc/elfinfo/default.nix
index cd19e263f0a58..e3ee51c58fdc6 100644
--- a/pkgs/development/tools/misc/elfinfo/default.nix
+++ b/pkgs/development/tools/misc/elfinfo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "elfinfo";
diff --git a/pkgs/development/tools/misc/gdbgui/default.nix b/pkgs/development/tools/misc/gdbgui/default.nix
index c01bb61f4f696..92338bb0323a6 100644
--- a/pkgs/development/tools/misc/gdbgui/default.nix
+++ b/pkgs/development/tools/misc/gdbgui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , gdb
diff --git a/pkgs/development/tools/misc/itm-tools/default.nix b/pkgs/development/tools/misc/itm-tools/default.nix
index 992b76bd62daa..32c32b536d9d0 100644
--- a/pkgs/development/tools/misc/itm-tools/default.nix
+++ b/pkgs/development/tools/misc/itm-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "itm-tools";
diff --git a/pkgs/development/tools/misc/loccount/default.nix b/pkgs/development/tools/misc/loccount/default.nix
index 59bab3742a267..32a14404c6062 100644
--- a/pkgs/development/tools/misc/loccount/default.nix
+++ b/pkgs/development/tools/misc/loccount/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitLab }:
+{ lib, buildGoPackage, fetchFromGitLab }:
 buildGoPackage rec {
   pname = "loccount";
   version = "1.2";
diff --git a/pkgs/development/tools/misc/nrfutil/default.nix b/pkgs/development/tools/misc/nrfutil/default.nix
index a8a18b254b98a..6d58a39f70492 100644
--- a/pkgs/development/tools/misc/nrfutil/default.nix
+++ b/pkgs/development/tools/misc/nrfutil/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37Packages, fetchFromGitHub }:
+{ lib, python37Packages, fetchFromGitHub }:
 
 with python37Packages; buildPythonApplication rec {
   pname = "nrfutil";
diff --git a/pkgs/development/tools/misc/perfect-hash/default.nix b/pkgs/development/tools/misc/perfect-hash/default.nix
index 7447bf660226b..71747f0d11729 100644
--- a/pkgs/development/tools/misc/perfect-hash/default.nix
+++ b/pkgs/development/tools/misc/perfect-hash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 python3.pkgs.buildPythonApplication rec {
   pname = "perfect-hash";
   version = "0.4.1";
diff --git a/pkgs/development/tools/misc/ptags/default.nix b/pkgs/development/tools/misc/ptags/default.nix
index 0ef7a2aa73a43..8406ecf298f80 100644
--- a/pkgs/development/tools/misc/ptags/default.nix
+++ b/pkgs/development/tools/misc/ptags/default.nix
@@ -2,7 +2,7 @@
 , cargo
 , lib
 , rustPlatform
-, stdenv
+
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/development/tools/misc/scc/default.nix b/pkgs/development/tools/misc/scc/default.nix
index 49052c141a1a7..8a5cbbcfdfae4 100644
--- a/pkgs/development/tools/misc/scc/default.nix
+++ b/pkgs/development/tools/misc/scc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "scc";
diff --git a/pkgs/development/tools/misc/unused/default.nix b/pkgs/development/tools/misc/unused/default.nix
index 6487c3fc2c0cc..1a5f3efe0e6ad 100644
--- a/pkgs/development/tools/misc/unused/default.nix
+++ b/pkgs/development/tools/misc/unused/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, cmake }:
+{ lib, fetchFromGitHub, rustPlatform, cmake }:
 rustPlatform.buildRustPackage rec {
   pname = "unused";
   version = "0.2.1";
diff --git a/pkgs/development/tools/misc/whatstyle/default.nix b/pkgs/development/tools/misc/whatstyle/default.nix
index 6afcfe871a471..d448251bf13d2 100644
--- a/pkgs/development/tools/misc/whatstyle/default.nix
+++ b/pkgs/development/tools/misc/whatstyle/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub, clang-unwrapped }:
+{ lib, python3, fetchFromGitHub, clang-unwrapped }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "whatstyle";
diff --git a/pkgs/development/tools/modd/default.nix b/pkgs/development/tools/modd/default.nix
index efe4c9605668a..c42e364b88ed9 100644
--- a/pkgs/development/tools/modd/default.nix
+++ b/pkgs/development/tools/modd/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv }:
+{ buildGoPackage, fetchFromGitHub, lib }:
 
 buildGoPackage rec {
   pname = "modd";
diff --git a/pkgs/development/tools/mustache-go/default.nix b/pkgs/development/tools/mustache-go/default.nix
index 99e4eb6215643..40181f16288a1 100644
--- a/pkgs/development/tools/mustache-go/default.nix
+++ b/pkgs/development/tools/mustache-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mustache-go";
diff --git a/pkgs/development/tools/ofono-phonesim/default.nix b/pkgs/development/tools/ofono-phonesim/default.nix
index 82ed82a67bdce..c9728f9cbbf63 100644
--- a/pkgs/development/tools/ofono-phonesim/default.nix
+++ b/pkgs/development/tools/ofono-phonesim/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchgit
 , autoreconfHook
diff --git a/pkgs/development/tools/out-of-tree/default.nix b/pkgs/development/tools/out-of-tree/default.nix
index 9ab69d1d5d85a..4547012e2f325 100644
--- a/pkgs/development/tools/out-of-tree/default.nix
+++ b/pkgs/development/tools/out-of-tree/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
+{ lib, buildGoModule, fetchgit, qemu, docker, which, makeWrapper }:
 
 buildGoModule rec {
   pname = "out-of-tree";
diff --git a/pkgs/development/tools/packer/default.nix b/pkgs/development/tools/packer/default.nix
index d4dd46cdcb5c5..16e5ac082039e 100644
--- a/pkgs/development/tools/packer/default.nix
+++ b/pkgs/development/tools/packer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 buildGoPackage rec {
   pname = "packer";
   version = "1.6.6";
diff --git a/pkgs/development/tools/packet-cli/default.nix b/pkgs/development/tools/packet-cli/default.nix
index ec07e4b058ee4..79457643ce679 100644
--- a/pkgs/development/tools/packet-cli/default.nix
+++ b/pkgs/development/tools/packet-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "packet-cli";
diff --git a/pkgs/development/tools/packet/default.nix b/pkgs/development/tools/packet/default.nix
index 31ccf19bb05fa..723e5d8bb2d1d 100644
--- a/pkgs/development/tools/packet/default.nix
+++ b/pkgs/development/tools/packet/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "packet";
diff --git a/pkgs/development/tools/parinfer-rust/default.nix b/pkgs/development/tools/parinfer-rust/default.nix
index 79c8f3791880e..ce733b8a2131b 100644
--- a/pkgs/development/tools/parinfer-rust/default.nix
+++ b/pkgs/development/tools/parinfer-rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, llvmPackages }:
+{ lib, rustPlatform, fetchFromGitHub, llvmPackages }:
 
 rustPlatform.buildRustPackage rec {
   pname = "parinfer-rust";
diff --git a/pkgs/development/tools/pax-rs/default.nix b/pkgs/development/tools/pax-rs/default.nix
index cda3ba5e8a8b9..ff4219ad09c6b 100644
--- a/pkgs/development/tools/pax-rs/default.nix
+++ b/pkgs/development/tools/pax-rs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
+{ lib, fetchFromGitHub, fetchurl, rustPlatform, runCommand } :
 with rustPlatform;
 
 buildRustPackage rec {
diff --git a/pkgs/development/tools/pew/default.nix b/pkgs/development/tools/pew/default.nix
index 6ca94041bb505..2d7294ec10523 100644
--- a/pkgs/development/tools/pew/default.nix
+++ b/pkgs/development/tools/pew/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/development/tools/profiling/pprof/default.nix b/pkgs/development/tools/profiling/pprof/default.nix
index dd2345378d437..eab000e8d8e4e 100644
--- a/pkgs/development/tools/profiling/pprof/default.nix
+++ b/pkgs/development/tools/profiling/pprof/default.nix
@@ -1,5 +1,5 @@
 # This file was originally generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "pprof-unstable";
diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
index 3f54a4f9c0eea..58458ea79aa2f 100644
--- a/pkgs/development/tools/purescript/spago/spago.nix
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -6,7 +6,7 @@
 , http-conduit, http-types, lens-family-core, megaparsec, mtl
 , network-uri, open-browser, optparse-applicative, prettyprinter
 , process, QuickCheck, retry, rio, rio-orphans, safe, semver-range
-, lib, stdenv, stm, stringsearch, tar, template-haskell, temporary, text
+, lib, stm, stringsearch, tar, template-haskell, temporary, text
 , time, transformers, turtle, unliftio, unordered-containers
 , utf8-string, vector, versions, with-utf8, zlib
 }:
diff --git a/pkgs/development/tools/quicktemplate/default.nix b/pkgs/development/tools/quicktemplate/default.nix
index 4edb60d11a156..4fe51d3e04636 100644
--- a/pkgs/development/tools/quicktemplate/default.nix
+++ b/pkgs/development/tools/quicktemplate/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "quicktemplate";
diff --git a/pkgs/development/tools/rdbtools/default.nix b/pkgs/development/tools/rdbtools/default.nix
index 5674876daba6c..e2f053c1e8168 100644
--- a/pkgs/development/tools/rdbtools/default.nix
+++ b/pkgs/development/tools/rdbtools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/development/tools/remarshal/default.nix b/pkgs/development/tools/remarshal/default.nix
index c37779a5293bf..385db11d7ff41 100644
--- a/pkgs/development/tools/remarshal/default.nix
+++ b/pkgs/development/tools/remarshal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "remarshal";
diff --git a/pkgs/development/tools/renderizer/default.nix b/pkgs/development/tools/renderizer/default.nix
index 747e80adf4f22..22bf5fbe904af 100644
--- a/pkgs/development/tools/renderizer/default.nix
+++ b/pkgs/development/tools/renderizer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "renderizer";
diff --git a/pkgs/development/tools/reno/default.nix b/pkgs/development/tools/reno/default.nix
index 17a334aba205e..ca01f6ebfa27a 100644
--- a/pkgs/development/tools/reno/default.nix
+++ b/pkgs/development/tools/reno/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , git
 , gnupg1
 , python3Packages
diff --git a/pkgs/development/tools/richgo/default.nix b/pkgs/development/tools/richgo/default.nix
index 1013c4aa8b439..81a912171f335 100644
--- a/pkgs/development/tools/richgo/default.nix
+++ b/pkgs/development/tools/richgo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "richgo";
diff --git a/pkgs/development/tools/run/default.nix b/pkgs/development/tools/run/default.nix
index a0c169d846610..45fb2b8f95788 100644
--- a/pkgs/development/tools/run/default.nix
+++ b/pkgs/development/tools/run/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "run";
   version = "0.7.2";
diff --git a/pkgs/development/tools/rust/bindgen/default.nix b/pkgs/development/tools/rust/bindgen/default.nix
index eef8a5e41fd27..f379e58ba16b5 100644
--- a/pkgs/development/tools/rust/bindgen/default.nix
+++ b/pkgs/development/tools/rust/bindgen/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
+{ lib, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
 , runtimeShell
 , bash
 }:
diff --git a/pkgs/development/tools/rust/cargo-binutils/default.nix b/pkgs/development/tools/rust/cargo-binutils/default.nix
index b79611ff5ecbc..8b40d9b686d9b 100644
--- a/pkgs/development/tools/rust/cargo-binutils/default.nix
+++ b/pkgs/development/tools/rust/cargo-binutils/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform, runCommand }:
+{ lib, fetchFromGitHub, rustPlatform, runCommand }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-binutils";
diff --git a/pkgs/development/tools/rust/cargo-embed/default.nix b/pkgs/development/tools/rust/cargo-embed/default.nix
index e4c5d8ab48c7d..989885e99a74f 100644
--- a/pkgs/development/tools/rust/cargo-embed/default.nix
+++ b/pkgs/development/tools/rust/cargo-embed/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-flash/default.nix b/pkgs/development/tools/rust/cargo-flash/default.nix
index dbd79f179aa36..39b56c2d656de 100644
--- a/pkgs/development/tools/rust/cargo-flash/default.nix
+++ b/pkgs/development/tools/rust/cargo-flash/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib
+{ lib
 , rustPlatform, fetchFromGitHub
 , libusb1, pkg-config, rustfmt }:
 
diff --git a/pkgs/development/tools/rust/cargo-fuzz/default.nix b/pkgs/development/tools/rust/cargo-fuzz/default.nix
index 904ba6efb52b5..569c8f88da2f7 100644
--- a/pkgs/development/tools/rust/cargo-fuzz/default.nix
+++ b/pkgs/development/tools/rust/cargo-fuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-fuzz";
diff --git a/pkgs/development/tools/rust/cargo-readme/default.nix b/pkgs/development/tools/rust/cargo-readme/default.nix
index ae638cac8a9a2..358c58bef4d42 100644
--- a/pkgs/development/tools/rust/cargo-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, fetchpatch }:
+{ lib, rustPlatform, fetchFromGitHub, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-readme";
diff --git a/pkgs/development/tools/rust/cargo-sweep/default.nix b/pkgs/development/tools/rust/cargo-sweep/default.nix
index 210449a72300a..f20bdb9cc1742 100644
--- a/pkgs/development/tools/rust/cargo-sweep/default.nix
+++ b/pkgs/development/tools/rust/cargo-sweep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sweep";
diff --git a/pkgs/development/tools/rust/cargo-sync-readme/default.nix b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
index 45ea6c430d15a..54f21ab46270e 100644
--- a/pkgs/development/tools/rust/cargo-sync-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-sync-readme";
diff --git a/pkgs/development/tools/rust/cargo-wipe/default.nix b/pkgs/development/tools/rust/cargo-wipe/default.nix
index 6c73b245e0473..c4c079c523b12 100644
--- a/pkgs/development/tools/rust/cargo-wipe/default.nix
+++ b/pkgs/development/tools/rust/cargo-wipe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , nix-update-script
diff --git a/pkgs/development/tools/rust/cargo-xbuild/default.nix b/pkgs/development/tools/rust/cargo-xbuild/default.nix
index 2e800402c1dd7..8aa701779bc0c 100644
--- a/pkgs/development/tools/rust/cargo-xbuild/default.nix
+++ b/pkgs/development/tools/rust/cargo-xbuild/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-xbuild";
diff --git a/pkgs/development/tools/rust/svd2rust/default.nix b/pkgs/development/tools/rust/svd2rust/default.nix
index 97da80562905b..6ec06fffe21fa 100644
--- a/pkgs/development/tools/rust/svd2rust/default.nix
+++ b/pkgs/development/tools/rust/svd2rust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 with rustPlatform;
 
diff --git a/pkgs/development/tools/sourcetrail/jedi.nix b/pkgs/development/tools/sourcetrail/jedi.nix
index fa25604f9fc5a..2e1ca55dad3fc 100644
--- a/pkgs/development/tools/sourcetrail/jedi.nix
+++ b/pkgs/development/tools/sourcetrail/jedi.nix
@@ -1,6 +1,6 @@
 # Taken from a past commit of nixpkgs
 
-{ lib, stdenv, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
+{ lib, buildPythonPackage, fetchPypi, pytest, glibcLocales, tox, pytestcov, parso }:
 
 buildPythonPackage rec {
   pname = "jedi";
diff --git a/pkgs/development/tools/summon/default.nix b/pkgs/development/tools/summon/default.nix
index 5d851adc5abcb..5c811aaf23912 100644
--- a/pkgs/development/tools/summon/default.nix
+++ b/pkgs/development/tools/summon/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
+{ buildGoModule, fetchFromGitHub, lib, patchResolver ? true }:
 
 with lib;
 
diff --git a/pkgs/development/tools/systemfd/default.nix b/pkgs/development/tools/systemfd/default.nix
index c25f0491c6725..a1c93f46dcb70 100644
--- a/pkgs/development/tools/systemfd/default.nix
+++ b/pkgs/development/tools/systemfd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, darwin, buildPlatform
+{ lib, fetchgit, darwin, buildPlatform
 , buildRustCrate, buildRustCrateHelpers, defaultCrateOverrides }:
 
 ((import ./Cargo.nix {
diff --git a/pkgs/development/tools/textql/default.nix b/pkgs/development/tools/textql/default.nix
index 7dc899c4fc46d..7b80192a75e75 100644
--- a/pkgs/development/tools/textql/default.nix
+++ b/pkgs/development/tools/textql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, sqlite }:
+{ lib, buildGoPackage, fetchFromGitHub, sqlite }:
 
 buildGoPackage rec {
   pname = "textql";
diff --git a/pkgs/development/tools/unityhub/default.nix b/pkgs/development/tools/unityhub/default.nix
index 9a2c1d72caa3a..dc2f802211729 100644
--- a/pkgs/development/tools/unityhub/default.nix
+++ b/pkgs/development/tools/unityhub/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
+{ lib, fetchurl, appimageTools, gsettings-desktop-schemas, gtk3 }:
 
 let
   version = "2.3.2";
diff --git a/pkgs/development/tools/vcstool/default.nix b/pkgs/development/tools/vcstool/default.nix
index 65f91b3324f54..f37b17057e595 100644
--- a/pkgs/development/tools/vcstool/default.nix
+++ b/pkgs/development/tools/vcstool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages
+{ lib, python3Packages
 , git, breezy, subversion }:
 
 with python3Packages;
diff --git a/pkgs/development/tools/vend/default.nix b/pkgs/development/tools/vend/default.nix
index cfadf694320e8..0b037a9068c18 100644
--- a/pkgs/development/tools/vend/default.nix
+++ b/pkgs/development/tools/vend/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vend";
diff --git a/pkgs/development/tools/vultr-cli/default.nix b/pkgs/development/tools/vultr-cli/default.nix
index 23dda32b72328..505023f3fddcd 100644
--- a/pkgs/development/tools/vultr-cli/default.nix
+++ b/pkgs/development/tools/vultr-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "vultr-cli";
diff --git a/pkgs/development/tools/vultr/default.nix b/pkgs/development/tools/vultr/default.nix
index b9ca0febf971a..1f101882b5b9c 100644
--- a/pkgs/development/tools/vultr/default.nix
+++ b/pkgs/development/tools/vultr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "vultr";
diff --git a/pkgs/development/tools/winpdb/default.nix b/pkgs/development/tools/winpdb/default.nix
index b7eaabe8693f9..b5e0701c136ee 100644
--- a/pkgs/development/tools/winpdb/default.nix
+++ b/pkgs/development/tools/winpdb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, makeDesktopItem }:
+{ lib, fetchurl, pythonPackages, makeDesktopItem }:
 
 pythonPackages.buildPythonApplication rec {
   name = "winpdb-1.4.8";
diff --git a/pkgs/development/tools/wllvm/default.nix b/pkgs/development/tools/wllvm/default.nix
index a3702f2e3e652..85dbc4f731a14 100644
--- a/pkgs/development/tools/wllvm/default.nix
+++ b/pkgs/development/tools/wllvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.2.8";
diff --git a/pkgs/development/tools/ws/default.nix b/pkgs/development/tools/ws/default.nix
index 3026289fec1ea..bef8eb906cf15 100644
--- a/pkgs/development/tools/ws/default.nix
+++ b/pkgs/development/tools/ws/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "ws";
diff --git a/pkgs/development/tools/yaml2json/default.nix b/pkgs/development/tools/yaml2json/default.nix
index d707caaec5a7d..77f884b82b6ac 100644
--- a/pkgs/development/tools/yaml2json/default.nix
+++ b/pkgs/development/tools/yaml2json/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 
 buildGoPackage {
diff --git a/pkgs/development/tools/yj/default.nix b/pkgs/development/tools/yj/default.nix
index 68ecaf6479ebc..303f325dec18e 100644
--- a/pkgs/development/tools/yj/default.nix
+++ b/pkgs/development/tools/yj/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "yj";
diff --git a/pkgs/development/web/shopify-themekit/default.nix b/pkgs/development/web/shopify-themekit/default.nix
index 60a3d330ab82e..bf0a8c6d81610 100644
--- a/pkgs/development/web/shopify-themekit/default.nix
+++ b/pkgs/development/web/shopify-themekit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "shopify-themekit";
diff --git a/pkgs/development/web/wml/default.nix b/pkgs/development/web/wml/default.nix
index 2b882ccc84183..a6ffe6e84e3fa 100644
--- a/pkgs/development/web/wml/default.nix
+++ b/pkgs/development/web/wml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
+{ lib, fetchurl, perlPackages, ncurses, lynx, makeWrapper }:
 
 perlPackages.buildPerlPackage {
   pname = "wml";
diff --git a/pkgs/games/20kly/default.nix b/pkgs/games/20kly/default.nix
index e8778d7bebcfb..092e0e4eac273 100644
--- a/pkgs/games/20kly/default.nix
+++ b/pkgs/games/20kly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , python }:
 
diff --git a/pkgs/games/boohu/default.nix b/pkgs/games/boohu/default.nix
index 9b46420d5fff4..8318935364539 100644
--- a/pkgs/games/boohu/default.nix
+++ b/pkgs/games/boohu/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/chessx/default.nix b/pkgs/games/chessx/default.nix
index f63f6362558e6..fb7c7fddf0955 100644
--- a/pkgs/games/chessx/default.nix
+++ b/pkgs/games/chessx/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation
-, lib, stdenv
+, lib
 , pkg-config
 , zlib
 , qtbase
diff --git a/pkgs/games/cockatrice/default.nix b/pkgs/games/cockatrice/default.nix
index d47e0d5521db5..a657913aad769 100644
--- a/pkgs/games/cockatrice/default.nix
+++ b/pkgs/games/cockatrice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, mkDerivation, cmake, protobuf
+{ lib, fetchFromGitHub, mkDerivation, cmake, protobuf
 , qtbase, qtmultimedia, qttools, qtwebsockets, wrapQtAppsHook
 }:
 
diff --git a/pkgs/games/eidolon/default.nix b/pkgs/games/eidolon/default.nix
index 3192976b0f62f..dcb72d53b3285 100644
--- a/pkgs/games/eidolon/default.nix
+++ b/pkgs/games/eidolon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, rustPlatform, pkg-config, openssl }:
+{ lib, fetchgit, rustPlatform, pkg-config, openssl }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eidolon";
diff --git a/pkgs/games/endgame-singularity/default.nix b/pkgs/games/endgame-singularity/default.nix
index f220a85e0eb65..d6b153018723c 100644
--- a/pkgs/games/endgame-singularity/default.nix
+++ b/pkgs/games/endgame-singularity/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchurl
 , fetchFromGitHub
 , unzip
diff --git a/pkgs/games/enyo-doom/default.nix b/pkgs/games/enyo-doom/default.nix
index 10cce9f3bf819..eeb4086f924e8 100644
--- a/pkgs/games/enyo-doom/default.nix
+++ b/pkgs/games/enyo-doom/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitLab, cmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitLab, cmake, qtbase }:
 
 mkDerivation rec {
   pname = "enyo-doom";
diff --git a/pkgs/games/factorio/mods.nix b/pkgs/games/factorio/mods.nix
index 8d9976689cc49..7327b9e228700 100644
--- a/pkgs/games/factorio/mods.nix
+++ b/pkgs/games/factorio/mods.nix
@@ -2,7 +2,7 @@
 # mods. It will eventually be replaced by a nixos-channel that will provide
 # derivations for most or all of the mods tracked through the official mod
 # manager site.
-{ lib, stdenv, fetchurl
+{ lib, fetchurl
 , factorio-utils
 , allRecommendedMods ? true
 , allOptionalMods ? false
diff --git a/pkgs/games/frogatto/default.nix b/pkgs/games/frogatto/default.nix
index fb09847908da6..69d5282aedcac 100644
--- a/pkgs/games/frogatto/default.nix
+++ b/pkgs/games/frogatto/default.nix
@@ -1,4 +1,4 @@
-{ buildEnv, lib, stdenv, callPackage, makeWrapper, makeDesktopItem }:
+{ buildEnv, lib, callPackage, makeWrapper, makeDesktopItem }:
 
 let
   description = "Action-adventure game, starring a certain quixotic frog";
diff --git a/pkgs/games/frozen-bubble/default.nix b/pkgs/games/frozen-bubble/default.nix
index d1521dae3c4e6..6883acb6014c0 100644
--- a/pkgs/games/frozen-bubble/default.nix
+++ b/pkgs/games/frozen-bubble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
+{ lib, fetchurl, perlPackages, pkg-config, SDL, SDL_mixer, SDL_Pango, glib }:
 
 perlPackages.buildPerlModule {
   pname = "frozen-bubble";
diff --git a/pkgs/games/gscrabble/default.nix b/pkgs/games/gscrabble/default.nix
index 7d63510aa991b..74411d63d3ebf 100644
--- a/pkgs/games/gscrabble/default.nix
+++ b/pkgs/games/gscrabble/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, wrapGAppsHook, gst_all_1, gobject-introspection
 , python3Packages, gnome3 }:
 
diff --git a/pkgs/games/gshogi/default.nix b/pkgs/games/gshogi/default.nix
index 5ed4bf5a3763b..c3479f6758af7 100644
--- a/pkgs/games/gshogi/default.nix
+++ b/pkgs/games/gshogi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub
+{ lib, buildPythonApplication, fetchFromGitHub
 , gtk3, gobject-introspection
 , wrapGAppsHook, python3Packages }:
 
diff --git a/pkgs/games/harmonist/default.nix b/pkgs/games/harmonist/default.nix
index 0705da6bfe949..4609f7d732cc8 100644
--- a/pkgs/games/harmonist/default.nix
+++ b/pkgs/games/harmonist/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, buildGoPackage}:
+{lib, fetchurl, buildGoPackage}:
 
 buildGoPackage rec {
 
diff --git a/pkgs/games/lunar-client/default.nix b/pkgs/games/lunar-client/default.nix
index f5c0e3faf77ac..0635ab8aed833 100644
--- a/pkgs/games/lunar-client/default.nix
+++ b/pkgs/games/lunar-client/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, appimageTools, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, makeDesktopItem }:
 let
   name = "lunar-client";
   version = "2.4.0";
diff --git a/pkgs/games/multimc/default.nix b/pkgs/games/multimc/default.nix
index 81fc1b98f3664..5a1f42ee130be 100644
--- a/pkgs/games/multimc/default.nix
+++ b/pkgs/games/multimc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, jdk8, zlib, file, makeWrapper, xorg, libpulseaudio, qtbase, libGL }:
 
 let
   jdk = jdk8;
diff --git a/pkgs/games/openra/common.nix b/pkgs/games/openra/common.nix
index 306c5de3b43a1..41c903e101167 100644
--- a/pkgs/games/openra/common.nix
+++ b/pkgs/games/openra/common.nix
@@ -1,7 +1,7 @@
 /*  The reusable code, and package attributes, between OpenRA engine packages (engine.nix)
     and out-of-tree mod packages (mod.nix).
 */
-{ lib, stdenv, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
+{ lib, makeSetupHook, curl, unzip, dos2unix, pkg-config, makeWrapper
 , lua, mono, dotnetPackages, python
 , libGL, freetype, openal, SDL2
 , zenity
diff --git a/pkgs/games/pokerth/default.nix b/pkgs/games/pokerth/default.nix
index 56f0d5a47f2c3..59555a8ac2401 100644
--- a/pkgs/games/pokerth/default.nix
+++ b/pkgs/games/pokerth/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkDerivation, stdenv, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
+{ lib, mkDerivation, fetchFromGitHub, runCommand, fetchpatch, patchutils, qmake, qtbase
 , SDL, SDL_mixer, boost, curl, gsasl, libgcrypt, libircclient, protobuf, sqlite
 , wrapQtAppsHook
 , tinyxml2, target ? "client" }:
diff --git a/pkgs/games/portmod/default.nix b/pkgs/games/portmod/default.nix
index 07451b8dc2a41..ef535991c23b4 100644
--- a/pkgs/games/portmod/default.nix
+++ b/pkgs/games/portmod/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, python3Packages, fetchFromGitLab, cacert,
+{ lib, callPackage, python3Packages, fetchFromGitLab, cacert,
   rustPlatform, bubblewrap, git, perlPackages, imagemagick7, fetchurl, fetchzip,
   jre, makeWrapper, tr-patcher, tes3cmd }:
 
diff --git a/pkgs/games/pro-office-calculator/default.nix b/pkgs/games/pro-office-calculator/default.nix
index dbe2db363ea1a..381a6e8742b0a 100644
--- a/pkgs/games/pro-office-calculator/default.nix
+++ b/pkgs/games/pro-office-calculator/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
+{ mkDerivation, lib, fetchFromGitHub, tinyxml-2, cmake, qtbase, qtmultimedia }:
 mkDerivation rec {
   version = "1.0.13";
   pname = "pro-office-calculator";
diff --git a/pkgs/games/pysolfc/default.nix b/pkgs/games/pysolfc/default.nix
index c765a1cbdf5bb..925532bbbf537 100644
--- a/pkgs/games/pysolfc/default.nix
+++ b/pkgs/games/pysolfc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildPythonApplication, python3Packages
+{ lib, fetchzip, buildPythonApplication, python3Packages
   , desktop-file-utils, freecell-solver }:
 
 buildPythonApplication rec {
diff --git a/pkgs/games/the-butterfly-effect/default.nix b/pkgs/games/the-butterfly-effect/default.nix
index c87d1bea1c735..f5330485eddc6 100644
--- a/pkgs/games/the-butterfly-effect/default.nix
+++ b/pkgs/games/the-butterfly-effect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
+{ lib, mkDerivation, fetchFromGitHub, qt5, box2d, which, cmake, gettext }:
 
 mkDerivation rec {
   pname = "tbe";
diff --git a/pkgs/games/wyvern/default.nix b/pkgs/games/wyvern/default.nix
index 5a6bc34fea5e2..f99faa282fdc6 100644
--- a/pkgs/games/wyvern/default.nix
+++ b/pkgs/games/wyvern/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchgit
 , rustPlatform
 , unzip
diff --git a/pkgs/misc/doge/default.nix b/pkgs/misc/doge/default.nix
index 8334444ec4c96..911917e6d2fa4 100644
--- a/pkgs/misc/doge/default.nix
+++ b/pkgs/misc/doge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv , python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "doge";
diff --git a/pkgs/misc/drivers/steamcontroller/default.nix b/pkgs/misc/drivers/steamcontroller/default.nix
index 77a2e03d1618c..db5c8e5d903b5 100644
--- a/pkgs/misc/drivers/steamcontroller/default.nix
+++ b/pkgs/misc/drivers/steamcontroller/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
+{ lib, fetchFromGitHub, python3Packages, libusb1, linuxHeaders
 , GyroplotSupport ? false
 }:
 
diff --git a/pkgs/misc/emulators/citra/default.nix b/pkgs/misc/emulators/citra/default.nix
index d092a87868389..e1a31d208e483 100644
--- a/pkgs/misc/emulators/citra/default.nix
+++ b/pkgs/misc/emulators/citra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
+{ mkDerivation, lib, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
 
 mkDerivation {
   pname = "citra";
diff --git a/pkgs/misc/emulators/firebird-emu/default.nix b/pkgs/misc/emulators/firebird-emu/default.nix
index 236eff8610cc0..c766df9e3c03e 100644
--- a/pkgs/misc/emulators/firebird-emu/default.nix
+++ b/pkgs/misc/emulators/firebird-emu/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase, qtdeclarative }:
 
 mkDerivation rec {
   pname = "firebird-emu";
diff --git a/pkgs/misc/emulators/melonDS/default.nix b/pkgs/misc/emulators/melonDS/default.nix
index dbf658b8fceab..b028701fe1105 100644
--- a/pkgs/misc/emulators/melonDS/default.nix
+++ b/pkgs/misc/emulators/melonDS/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , mkDerivation
 , cmake
diff --git a/pkgs/misc/emulators/ruffle/default.nix b/pkgs/misc/emulators/ruffle/default.nix
index 475e54076fc2d..9e1f986341f71 100644
--- a/pkgs/misc/emulators/ruffle/default.nix
+++ b/pkgs/misc/emulators/ruffle/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , python3
 , rustPlatform
-, lib, stdenv
+, lib
 , wayland
 , xorg
 , vulkan-loader
diff --git a/pkgs/misc/emulators/wine/staging.nix b/pkgs/misc/emulators/wine/staging.nix
index 24da1d86bbfdc..abfc4f832a3bd 100644
--- a/pkgs/misc/emulators/wine/staging.nix
+++ b/pkgs/misc/emulators/wine/staging.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, wineUnstable }:
+{ lib, callPackage, wineUnstable }:
 
 with callPackage ./util.nix {};
 
diff --git a/pkgs/misc/emulators/yabause/default.nix b/pkgs/misc/emulators/yabause/default.nix
index 43f077227dbf4..17b7b563c15f4 100644
--- a/pkgs/misc/emulators/yabause/default.nix
+++ b/pkgs/misc/emulators/yabause/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, qtbase, qt5, libGLU, libGL
 , freeglut ? null, openal ? null, SDL2 ? null }:
 
 mkDerivation rec {
diff --git a/pkgs/misc/lilypond/with-fonts.nix b/pkgs/misc/lilypond/with-fonts.nix
index c4de45421f24b..2f3a95a33022e 100644
--- a/pkgs/misc/lilypond/with-fonts.nix
+++ b/pkgs/misc/lilypond/with-fonts.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, lndir, symlinkJoin, makeWrapper
+{ lib, lndir, symlinkJoin, makeWrapper
 , lilypond, openlilylib-fonts
 }:
 
diff --git a/pkgs/misc/logging/beats/6.x.nix b/pkgs/misc/logging/beats/6.x.nix
index 1be14ecec9b87..ce80b174d3274 100644
--- a/pkgs/misc/logging/beats/6.x.nix
+++ b/pkgs/misc/logging/beats/6.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk6Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/logging/beats/7.x.nix b/pkgs/misc/logging/beats/7.x.nix
index d7416731e6368..43ea85508c690 100644
--- a/pkgs/misc/logging/beats/7.x.nix
+++ b/pkgs/misc/logging/beats/7.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
+{ lib, fetchFromGitHub, elk7Version, buildGoPackage, libpcap, systemd }:
 
 let beat = package : extraArgs : buildGoPackage (rec {
       name = "${package}-${version}";
diff --git a/pkgs/misc/vscode-extensions/cpptools/default.nix b/pkgs/misc/vscode-extensions/cpptools/default.nix
index bb547b3d34d08..188da860530a2 100644
--- a/pkgs/misc/vscode-extensions/cpptools/default.nix
+++ b/pkgs/misc/vscode-extensions/cpptools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, vscode-utils
+{ lib, vscode-utils
 , fetchurl, unzip
 , mono, writeScript, runtimeShell
 , jq, clang-tools
diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index f561755fc4bd3..b894eb7fa4dd0 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
+{ config, lib, callPackage, vscode-utils, nodePackages,llvmPackages_8, llvmPackages_latest }:
 
 let
   inherit (vscode-utils) buildVscodeMarketplaceExtension;
diff --git a/pkgs/misc/vscode-extensions/remote-ssh/default.nix b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
index 82924f369ae73..746bb4608ab82 100644
--- a/pkgs/misc/vscode-extensions/remote-ssh/default.nix
+++ b/pkgs/misc/vscode-extensions/remote-ssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , vscode-utils
 , useLocalExtensions ? false}:
 # Note that useLocalExtensions requires that vscode-server is not running
diff --git a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
index d19027fa57628..0136bf4e5b1bd 100644
--- a/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
+++ b/pkgs/misc/vscode-extensions/rust-analyzer/default.nix
@@ -1,5 +1,5 @@
 # Update script: pkgs/development/tools/rust/rust-analyzer/update.sh
-{ lib, stdenv, vscode-utils, jq, rust-analyzer, nodePackages
+{ lib, vscode-utils, jq, rust-analyzer, nodePackages
 , setDefaultServerPath ? true
 }:
 
diff --git a/pkgs/misc/vscode-extensions/wakatime/default.nix b/pkgs/misc/vscode-extensions/wakatime/default.nix
index 336cd059f57a7..86453b960cbaa 100644
--- a/pkgs/misc/vscode-extensions/wakatime/default.nix
+++ b/pkgs/misc/vscode-extensions/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , wakatime, vscode-utils }:
 
 let
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
index 9afd4b475de5e..b53c5985a21c2 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
index 3e5399dbb3559..609cd579f9f63 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/CommonCrypto/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
index 2f6c8319b1cf6..e3b3179d4a3b2 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Csu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   prePatch = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
index cb54212f21765..0ba61ccb49150 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/IOKit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
+{ lib, appleDerivation, IOKitSrcs, xnu, darwin-stubs }:
 
 # Someday it'll make sense to split these out into their own packages, but today is not that day.
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
index 7f93a87837a2e..1bf6396d47fd9 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Librpcsvc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, developer_cmds }:
+{ lib, appleDerivation, developer_cmds }:
 
 appleDerivation {
   buildInputs = [ developer_cmds ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index a5508b5ec12fd..ad3f5dea97579 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
+{ lib, appleDerivation, cpio, xnu, Libc, Libm, libdispatch, cctools, Libinfo
 , dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto
 , copyfile, removefile, libresolv, Libnotify, libplatform, libpthread
 , mDNSResponder, launchd, libutil, hfs, darling, darwin-stubs }:
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
index 4f719ef846346..4855c532acb79 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/boot.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
+{ lib, appleDerivation, fetchzip, bsdmake, perl, flex, yacc
 }:
 
 # this derivation sucks
diff --git a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
index 614bdf570f3fe..6e659df4d620f 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/adv_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuild, ncurses, libutil }:
+{ lib, appleDerivation, xcbuild, ncurses, libutil }:
 
 appleDerivation {
   # We can't just run the root build, because https://github.com/facebook/xcbuild/issues/264
diff --git a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
index f7503dbb953c7..5a3b171021613 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   dontBuild = true;
diff --git a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
index 8cff145661f6a..7d011d2d8cc86 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
index 5819101e10a7c..27a7f7b3e7c55 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bootstrap_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, yacc, flex }:
+{ lib, appleDerivation, yacc, flex }:
 
 appleDerivation {
   nativeBuildInputs = [ yacc flex ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
index 5a5a603eae800..6f666019c3b31 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/bsdmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, makeWrapper }:
+{ lib, appleDerivation, makeWrapper }:
 
 appleDerivation {
   nativeBuildInputs = [ makeWrapper ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
index db57537bacbf2..77de079e2f0f4 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/developer_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, llvmPackages }:
+{ lib, appleDerivation, xcbuildHook, llvmPackages }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
index e46e826053fb3..1daa492961040 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , Libc, xnu, libutil }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
index 4a72ea337ebfb..01d44d22f5ef0 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/dyld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   installPhase = ''
diff --git a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
index 407117f1dbd75..258d9785e7042 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/file_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
+{ lib, appleDerivation, xcbuildHook, zlib, bzip2, lzma, ncurses, libutil }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
index ceb4b18df177e..d9a9beaccfc8a 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libpthread/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, libdispatch, xnu }:
+{ lib, appleDerivation, libdispatch, xnu }:
 
 appleDerivation {
   propagatedBuildInputs = [ libdispatch xnu ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
index 24986e288524b..5021d3cd7fec3 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation }:
+{ lib, appleDerivation }:
 
 appleDerivation {
   buildPhase = ":";
diff --git a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
index f216a820dd411..dd3cf03095266 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook
+{ lib, appleDerivation, xcbuildHook
 , openssl_1_0_2, Librpcsvc, xnu, libpcap, developer_cmds }:
 
 appleDerivation {
diff --git a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
index 771dd41b57547..e2e13a168f04c 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/shell_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook }:
+{ lib, appleDerivation, xcbuildHook }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
index d5dca4a303548..3f0c91db91ca9 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/text_cmds/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
+{ lib, appleDerivation, xcbuildHook, ncurses, bzip2, zlib, lzma }:
 
 appleDerivation {
   nativeBuildInputs = [ xcbuildHook ];
diff --git a/pkgs/os-specific/darwin/stubs/default.nix b/pkgs/os-specific/darwin/stubs/default.nix
index e21f00beb5aa4..862305a069d60 100644
--- a/pkgs/os-specific/darwin/stubs/default.nix
+++ b/pkgs/os-specific/darwin/stubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeScriptBin, runtimeShell }:
+{ lib, writeScriptBin, runtimeShell }:
 
 let fake = name: lib.overrideDerivation (writeScriptBin name ''
   #!${runtimeShell}
diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
index cc485bb62c648..16ed52ea81e70 100644
--- a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -2,7 +2,7 @@
 , clang-unwrapped
 , binutils-unwrapped
 , runCommand
-, stdenv
+
 , wrapBintoolsWith
 , wrapCCWith
 , buildIosSdk, targetIosSdkPkgs
diff --git a/pkgs/os-specific/linux/busybox/sandbox-shell.nix b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
index 036ea0a0f4860..f5db0b25f18fd 100644
--- a/pkgs/os-specific/linux/busybox/sandbox-shell.nix
+++ b/pkgs/os-specific/linux/busybox/sandbox-shell.nix
@@ -1,4 +1,4 @@
-{ busybox, stdenv}:
+{ busybox}:
 
 # Minimal shell for use as basic /bin/sh in sandbox builds
 busybox.override {
diff --git a/pkgs/os-specific/linux/cpuset/default.nix b/pkgs/os-specific/linux/cpuset/default.nix
index d1a93e4247e9b..e82e3f5901c18 100644
--- a/pkgs/os-specific/linux/cpuset/default.nix
+++ b/pkgs/os-specific/linux/cpuset/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , fetchpatch
 , pythonPackages
diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index 25f541d7a0039..e23591168f6ee 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , dbus
 , dbus_cplusplus
diff --git a/pkgs/os-specific/linux/firmware/zd1211/default.nix b/pkgs/os-specific/linux/firmware/zd1211/default.nix
index 9baa4eee62191..15e53557126dd 100644
--- a/pkgs/os-specific/linux/firmware/zd1211/default.nix
+++ b/pkgs/os-specific/linux/firmware/zd1211/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip }:
+{ lib, fetchzip }:
 
 let
   pname = "zd1211-firmware";
diff --git a/pkgs/os-specific/linux/fscrypt/default.nix b/pkgs/os-specific/linux/fscrypt/default.nix
index db4b70037c8f7..b60a10c73ede6 100644
--- a/pkgs/os-specific/linux/fscrypt/default.nix
+++ b/pkgs/os-specific/linux/fscrypt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
+{ lib, buildGoModule, fetchFromGitHub, gnum4, pam, fscrypt-experimental }:
 
 # Don't use this for anything important yet!
 
diff --git a/pkgs/os-specific/linux/iotop/default.nix b/pkgs/os-specific/linux/iotop/default.nix
index 1924e326c1e57..a91175aa59f30 100644
--- a/pkgs/os-specific/linux/iotop/default.nix
+++ b/pkgs/os-specific/linux/iotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, fetchpatch }:
+{ lib, fetchurl, python3Packages, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   name = "iotop-0.6";
diff --git a/pkgs/os-specific/linux/iproute/mptcp.nix b/pkgs/os-specific/linux/iproute/mptcp.nix
index 6505d1d80eea2..7285e27ff36ba 100644
--- a/pkgs/os-specific/linux/iproute/mptcp.nix
+++ b/pkgs/os-specific/linux/iproute/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, iproute, fetchFromGitHub }:
+{ lib, iproute, fetchFromGitHub }:
 
 iproute.overrideAttrs (oa: rec {
   pname = "iproute_mptcp";
diff --git a/pkgs/os-specific/linux/kernel/hardened/config.nix b/pkgs/os-specific/linux/kernel/hardened/config.nix
index ffd710e632e0f..bd0518650d6c9 100644
--- a/pkgs/os-specific/linux/kernel/hardened/config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened/config.nix
@@ -8,7 +8,7 @@
 #
 # See also <nixos/modules/profiles/hardened.nix>
 
-{ lib, stdenv, version }:
+{ lib, version }:
 
 with lib;
 with lib.kernel;
diff --git a/pkgs/os-specific/linux/kernel/linux-4.14.nix b/pkgs/os-specific/linux/kernel/linux-4.14.nix
index d1d9e94e2a6bd..193f6c3d160b0 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.14.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.19.nix b/pkgs/os-specific/linux/kernel/linux-4.19.nix
index 2bc5321ea7f6e..99425f984f744 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.19.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.19.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-4.4.nix b/pkgs/os-specific/linux/kernel/linux-4.4.nix
index 9c04ee72238f1..6b2e8f08ecba8 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.4.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.4.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-4.9.nix b/pkgs/os-specific/linux/kernel/linux-4.9.nix
index df298ade08427..2c0c3457ef031 100644
--- a/pkgs/os-specific/linux/kernel/linux-4.9.nix
+++ b/pkgs/os-specific/linux/kernel/linux-4.9.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args:
+{ buildPackages, fetchurl, perl, buildLinux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.9.253";
diff --git a/pkgs/os-specific/linux/kernel/linux-5.10.nix b/pkgs/os-specific/linux/kernel/linux-5.10.nix
index 0eaa148a49c06..2afabcad04249 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.10.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.10.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-5.4.nix b/pkgs/os-specific/linux/kernel/linux-5.4.nix
index 0469b731b894b..1d098416c3d00 100644
--- a/pkgs/os-specific/linux/kernel/linux-5.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-5.4.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
index a272bd286f32a..a64520ab89325 100644
--- a/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
+++ b/pkgs/os-specific/linux/kernel/linux-hardkernel-4.14.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
+{ buildPackages, fetchFromGitHub, perl, buildLinux, libelf, util-linux, ... } @ args:
 
 buildLinux (args // rec {
   version = "4.14.165-172";
diff --git a/pkgs/os-specific/linux/kernel/linux-lqx.nix b/pkgs/os-specific/linux/kernel/linux-lqx.nix
index 35df8e99ddcaa..3c938fd8e6f58 100644
--- a/pkgs/os-specific/linux/kernel/linux-lqx.nix
+++ b/pkgs/os-specific/linux/kernel/linux-lqx.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
index f7bca36481bfa..cd661be1078c5 100644
--- a/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
+++ b/pkgs/os-specific/linux/kernel/linux-mptcp-95.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, perl, buildLinux, structuredExtraConfig ? {}, ... } @ args:
 let
   mptcpVersion = "0.95";
   modDirVersion = "4.19.55";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
index 5f0f513ff459a..b1874bf38202a 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
+{ lib, buildPackages, fetchFromGitHub, fetchpatch, perl, buildLinux, ... } @ args:
 
 buildLinux (args // {
   version = "5.9.0-2020.11.20";
diff --git a/pkgs/os-specific/linux/kernel/linux-testing.nix b/pkgs/os-specific/linux/kernel/linux-testing.nix
index 98fafaadece77..5210e3ed7a8cd 100644
--- a/pkgs/os-specific/linux/kernel/linux-testing.nix
+++ b/pkgs/os-specific/linux/kernel/linux-testing.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
+{ lib, buildPackages, fetchurl, perl, buildLinux, modDirVersionArg ? null, ... } @ args:
 
 with lib;
 
diff --git a/pkgs/os-specific/linux/kernel/linux-zen.nix b/pkgs/os-specific/linux/kernel/linux-zen.nix
index aa73e7b8a3e89..b30afb59ca8ea 100644
--- a/pkgs/os-specific/linux/kernel/linux-zen.nix
+++ b/pkgs/os-specific/linux/kernel/linux-zen.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildLinux, ... } @ args:
+{ lib, fetchFromGitHub, buildLinux, ... } @ args:
 
 let
   version = "5.10.9";
diff --git a/pkgs/os-specific/linux/net-tools/mptcp.nix b/pkgs/os-specific/linux/net-tools/mptcp.nix
index a9f99874367c1..577b7c25311a3 100644
--- a/pkgs/os-specific/linux/net-tools/mptcp.nix
+++ b/pkgs/os-specific/linux/net-tools/mptcp.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, nettools, fetchFromGitHub  }:
+{ lib, nettools, fetchFromGitHub  }:
 
 nettools.overrideAttrs(oa: rec {
   name = "net-tools-mptcp";
diff --git a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
index c74810d24d5a1..f15a5b6377900 100644
--- a/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
+++ b/pkgs/os-specific/linux/oci-seccomp-bpf-hook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , go-md2man
diff --git a/pkgs/os-specific/linux/openrazer/driver.nix b/pkgs/os-specific/linux/openrazer/driver.nix
index 32c99a8be13a6..4745ba818a905 100644
--- a/pkgs/os-specific/linux/openrazer/driver.nix
+++ b/pkgs/os-specific/linux/openrazer/driver.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib stdenv fetchFromGitHub; };
+  common = import ../../../development/python-modules/openrazer/common.nix { inherit lib fetchFromGitHub; };
 in
 stdenv.mkDerivation (common // {
   name = "openrazer-${common.version}-${kernel.version}";
diff --git a/pkgs/os-specific/linux/piper/default.nix b/pkgs/os-specific/linux/piper/default.nix
index 1ef304c617f75..839b3f1b78f51 100644
--- a/pkgs/os-specific/linux/piper/default.nix
+++ b/pkgs/os-specific/linux/piper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
+{ lib, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
 , wrapGAppsHook, gtk3, glib, desktop-file-utils, appstream-glib, gnome3
 , gobject-introspection }:
 
diff --git a/pkgs/os-specific/linux/s6-linux-init/default.nix b/pkgs/os-specific/linux/s6-linux-init/default.nix
index 2fb6c9441edc8..87cc098d07d44 100644
--- a/pkgs/os-specific/linux/s6-linux-init/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-init/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/s6-linux-utils/default.nix b/pkgs/os-specific/linux/s6-linux-utils/default.nix
index 209f596d273ef..132a0b49574c3 100644
--- a/pkgs/os-specific/linux/s6-linux-utils/default.nix
+++ b/pkgs/os-specific/linux/s6-linux-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/os-specific/linux/sd-switch/default.nix b/pkgs/os-specific/linux/sd-switch/default.nix
index 026488a24ded7..a58b7efa7b302 100644
--- a/pkgs/os-specific/linux/sd-switch/default.nix
+++ b/pkgs/os-specific/linux/sd-switch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
+{ lib, fetchFromGitLab, rustPlatform, pkg-config, dbus }:
 
 rustPlatform.buildRustPackage rec {
   pname = "sd-switch";
diff --git a/pkgs/os-specific/linux/setools/default.nix b/pkgs/os-specific/linux/setools/default.nix
index bcdb622866b8b..0da84ab1cefdc 100644
--- a/pkgs/os-specific/linux/setools/default.nix
+++ b/pkgs/os-specific/linux/setools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3
+{ lib, fetchFromGitHub, python3
 , libsepol, libselinux, checkpolicy
 , withGraphics ? false
 }:
diff --git a/pkgs/os-specific/linux/targetcli/default.nix b/pkgs/os-specific/linux/targetcli/default.nix
index ba1c063cc054f..4d3446d5a5d68 100644
--- a/pkgs/os-specific/linux/targetcli/default.nix
+++ b/pkgs/os-specific/linux/targetcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "targetcli";
diff --git a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
index 4db4d64bc939b..594cf6bfc42ff 100644
--- a/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
+++ b/pkgs/os-specific/linux/trace-cmd/kernelshark.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
+{ lib, mkDerivation, fetchgit, qtbase, cmake, asciidoc, docbook_xsl, json_c, mesa_glu, freeglut, trace-cmd, pkg-config }:
 mkDerivation {
   pname = "kernelshark";
   version = "1.1.0";
diff --git a/pkgs/os-specific/linux/undervolt/default.nix b/pkgs/os-specific/linux/undervolt/default.nix
index 5f4ffb50c07bc..cc9fb7374658b 100644
--- a/pkgs/os-specific/linux/undervolt/default.nix
+++ b/pkgs/os-specific/linux/undervolt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "0.3.0";
diff --git a/pkgs/os-specific/linux/wpa_supplicant/gui.nix b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
index ab1cece0f3392..d2d59ba21a5ed 100644
--- a/pkgs/os-specific/linux/wpa_supplicant/gui.nix
+++ b/pkgs/os-specific/linux/wpa_supplicant/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
+{ lib, mkDerivation, fetchpatch, qtbase, qmake, inkscape, imagemagick, wpa_supplicant }:
 
 mkDerivation {
   name = "wpa_gui-${wpa_supplicant.version}";
diff --git a/pkgs/servers/caddy/default.nix b/pkgs/servers/caddy/default.nix
index d48bcad179466..3e6641b8d26f9 100644
--- a/pkgs/servers/caddy/default.nix
+++ b/pkgs/servers/caddy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "caddy";
diff --git a/pkgs/servers/cayley/default.nix b/pkgs/servers/cayley/default.nix
index 8ab171a2f4377..c9d06d4977147 100644
--- a/pkgs/servers/cayley/default.nix
+++ b/pkgs/servers/cayley/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "cayley";
diff --git a/pkgs/servers/cloud-print-connector/default.nix b/pkgs/servers/cloud-print-connector/default.nix
index 8e1ef83126916..f6f6a0fbd7153 100644
--- a/pkgs/servers/cloud-print-connector/default.nix
+++ b/pkgs/servers/cloud-print-connector/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, avahi, cups, fetchpatch }:
 
 # TODO: Add a service for gcp-cups-connector and perhaps some other
 # kind of configuration for the same thing that gcp-connector-util
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index 4c0ce8d511e8c..9dc723417d604 100644
--- a/pkgs/servers/consul/default.nix
+++ b/pkgs/servers/consul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "consul";
diff --git a/pkgs/servers/demoit/default.nix b/pkgs/servers/demoit/default.nix
index 0c6fe81877564..4a499e7f878cc 100644
--- a/pkgs/servers/demoit/default.nix
+++ b/pkgs/servers/demoit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/dns/coredns/default.nix b/pkgs/servers/dns/coredns/default.nix
index adb1a7f329bc3..cdfc78d622293 100644
--- a/pkgs/servers/dns/coredns/default.nix
+++ b/pkgs/servers/dns/coredns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "coredns";
diff --git a/pkgs/servers/foundationdb/default.nix b/pkgs/servers/foundationdb/default.nix
index 0e608051a9ea8..10d517179c2f7 100644
--- a/pkgs/servers/foundationdb/default.nix
+++ b/pkgs/servers/foundationdb/default.nix
@@ -1,4 +1,4 @@
-{ gcc6Stdenv, stdenv, gccStdenv, llvmPackages
+{ gcc6Stdenv, gccStdenv, llvmPackages
 , lib, fetchurl, fetchpatch, fetchFromGitHub
 
 , cmake, ninja, which, findutils, m4, gawk
diff --git a/pkgs/servers/gotty/default.nix b/pkgs/servers/gotty/default.nix
index c4881baeac064..7bd09569248f0 100644
--- a/pkgs/servers/gotty/default.nix
+++ b/pkgs/servers/gotty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gotty";
diff --git a/pkgs/servers/headphones/default.nix b/pkgs/servers/headphones/default.nix
index 75d15d4f37863..67b328d661a9d 100644
--- a/pkgs/servers/headphones/default.nix
+++ b/pkgs/servers/headphones/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "headphones";
diff --git a/pkgs/servers/holochain-go/default.nix b/pkgs/servers/holochain-go/default.nix
index e6e35c35900ea..0d138e1f648ec 100644
--- a/pkgs/servers/holochain-go/default.nix
+++ b/pkgs/servers/holochain-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "holochain-go${version}";
diff --git a/pkgs/servers/http/hyp/default.nix b/pkgs/servers/http/hyp/default.nix
index 52f345d547719..1faa85cfc1415 100644
--- a/pkgs/servers/http/hyp/default.nix
+++ b/pkgs/servers/http/hyp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "hyp-server";
diff --git a/pkgs/servers/hydron/default.nix b/pkgs/servers/hydron/default.nix
index 8b950ec12c54c..41c69bde28528 100644
--- a/pkgs/servers/hydron/default.nix
+++ b/pkgs/servers/hydron/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
+{ lib, buildGoModule, fetchFromGitHub, pkg-config, ffmpeg }:
 
 buildGoModule rec {
   pname = "hydron";
diff --git a/pkgs/servers/icingaweb2/default.nix b/pkgs/servers/icingaweb2/default.nix
index eaf16e3880483..e7d9b1a2847be 100644
--- a/pkgs/servers/icingaweb2/default.nix
+++ b/pkgs/servers/icingaweb2/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, lib, fetchFromGitHub, makeWrapper, php }: with lib; stdenv.mkDerivation rec {
+{ stdenv, lib, fetchFromGitHub, makeWrapper, php }:
+
+stdenv.mkDerivation rec {
   pname = "icingaweb2";
   version = "2.8.2";
 
@@ -16,10 +18,10 @@
     cp -ra application bin etc library modules public $out
     cp -ra doc $out/share
 
-    wrapProgram $out/bin/icingacli --prefix PATH : "${makeBinPath [ php ]}"
+    wrapProgram $out/bin/icingacli --prefix PATH : "${lib.makeBinPath [ php ]}"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Webinterface for Icinga 2";
     longDescription = ''
       A lightweight and extensible web interface to keep an eye on your environment.
diff --git a/pkgs/servers/icingaweb2/theme-april/default.nix b/pkgs/servers/icingaweb2/theme-april/default.nix
index 7c592fca33b63..0a152a7e157ec 100644
--- a/pkgs/servers/icingaweb2/theme-april/default.nix
+++ b/pkgs/servers/icingaweb2/theme-april/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-april";
   version = "1.0.4";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Icingaweb2 theme for april fools";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-april";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-lsd/default.nix b/pkgs/servers/icingaweb2/theme-lsd/default.nix
index 273bcf6945d91..59b8df6b4d42b 100644
--- a/pkgs/servers/icingaweb2/theme-lsd/default.nix
+++ b/pkgs/servers/icingaweb2/theme-lsd/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-lsd";
   version = "1.0.3";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Psychadelic theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-lsd";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-particles/default.nix b/pkgs/servers/icingaweb2/theme-particles/default.nix
index 3d28481cd84ee..ddd363701a7c0 100644
--- a/pkgs/servers/icingaweb2/theme-particles/default.nix
+++ b/pkgs/servers/icingaweb2/theme-particles/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-particles";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "This theme adds a nice particle effect to the login screen of Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-particles";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-snow/default.nix b/pkgs/servers/icingaweb2/theme-snow/default.nix
index 941138bb0a520..5650d1ccdba84 100644
--- a/pkgs/servers/icingaweb2/theme-snow/default.nix
+++ b/pkgs/servers/icingaweb2/theme-snow/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-snow";
   version = "1.0.0";
 
@@ -20,7 +25,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Snow theme for Icingaweb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-snow";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-spring/default.nix b/pkgs/servers/icingaweb2/theme-spring/default.nix
index a21f6cc89a25f..dda26caf6a19e 100644
--- a/pkgs/servers/icingaweb2/theme-spring/default.nix
+++ b/pkgs/servers/icingaweb2/theme-spring/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, lib, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-spring";
   version = "1.0.0";
 
@@ -14,7 +19,7 @@
     cp -r * "$out"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Theme with some soft colors and nice background images loaded from unsplash.com";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-spring";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/icingaweb2/theme-unicorn/default.nix b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
index a43f7d7c09ade..a2bb3f9e4a2b8 100644
--- a/pkgs/servers/icingaweb2/theme-unicorn/default.nix
+++ b/pkgs/servers/icingaweb2/theme-unicorn/default.nix
@@ -1,4 +1,10 @@
-{ stdenv, lib, fetchurl, fetchFromGitHub }: with lib; stdenv.mkDerivation rec {
+{ lib
+, stdenv
+, fetchurl
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
   name = "icingaweb2-theme-unicorn";
   version = "1.0.2";
 
@@ -35,7 +41,7 @@
     cp unicorn.png "$out/public/img/unicorn.png"
   '';
 
-  meta = {
+  meta = with lib; {
     description = "Unicorn theme for IcingaWeb 2";
     homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-unicorn";
     license = licenses.publicDomain;
diff --git a/pkgs/servers/identd/nullidentdmod/default.nix b/pkgs/servers/identd/nullidentdmod/default.nix
index b383135f2eb52..ee759ac55ea1e 100644
--- a/pkgs/servers/identd/nullidentdmod/default.nix
+++ b/pkgs/servers/identd/nullidentdmod/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "nullidentdmod";
   version = "1.3";
 
diff --git a/pkgs/servers/irc/robustirc-bridge/default.nix b/pkgs/servers/irc/robustirc-bridge/default.nix
index d0b192010c101..2530c72cbb9d6 100644
--- a/pkgs/servers/irc/robustirc-bridge/default.nix
+++ b/pkgs/servers/irc/robustirc-bridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "robustirc-bridge";
diff --git a/pkgs/servers/isso/default.nix b/pkgs/servers/isso/default.nix
index 4680c37c85e37..b9bce56d9fa07 100644
--- a/pkgs/servers/isso/default.nix
+++ b/pkgs/servers/isso/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages; buildPythonApplication rec {
 
diff --git a/pkgs/servers/kapowbang/default.nix b/pkgs/servers/kapowbang/default.nix
index b52018b64f4ce..94a1832bd8d3f 100644
--- a/pkgs/servers/kapowbang/default.nix
+++ b/pkgs/servers/kapowbang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kapowbang";
diff --git a/pkgs/servers/livepeer/default.nix b/pkgs/servers/livepeer/default.nix
index acfa1aa2c3fbd..a016c8e7f099d 100644
--- a/pkgs/servers/livepeer/default.nix
+++ b/pkgs/servers/livepeer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule
+{ lib, fetchFromGitHub, buildGoModule
 , pkg-config, ffmpeg, gnutls
 }:
 
diff --git a/pkgs/servers/mail/mailhog/default.nix b/pkgs/servers/mail/mailhog/default.nix
index f1ba497720a9d..674fdbabb4eb9 100644
--- a/pkgs/servers/mail/mailhog/default.nix
+++ b/pkgs/servers/mail/mailhog/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "MailHog";
diff --git a/pkgs/servers/mail/mailman/default.nix b/pkgs/servers/mail/mailman/default.nix
index 57ceee948b50d..9a86cc31fdd89 100644
--- a/pkgs/servers/mail/mailman/default.nix
+++ b/pkgs/servers/mail/mailman/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, isPy3k, alembic, aiosmtpd, dnspython
 , flufl_bounce, flufl_i18n, flufl_lock, lazr_config, lazr_delegates, passlib
 , requests, zope_configuration, click, falcon, importlib-resources
 , zope_component, lynx, postfix, authheaders, gunicorn
diff --git a/pkgs/servers/mail/mailman/hyperkitty.nix b/pkgs/servers/mail/mailman/hyperkitty.nix
index 58ef52e9c26de..00cf2c1e83c0e 100644
--- a/pkgs/servers/mail/mailman/hyperkitty.nix
+++ b/pkgs/servers/mail/mailman/hyperkitty.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
+{ lib, buildPythonPackage, fetchPypi, isPy3k, isort, coverage, mock
 , robot-detection, django_extensions, rjsmin, cssmin, django-mailman3
 , django-haystack, flufl_lock, networkx, dateutil, defusedxml
 , django-paintstore, djangorestframework, django, django-q
diff --git a/pkgs/servers/mail/mailman/postorius.nix b/pkgs/servers/mail/mailman/postorius.nix
index ab8ad4440ab6e..9330de3a8f386 100644
--- a/pkgs/servers/mail/mailman/postorius.nix
+++ b/pkgs/servers/mail/mailman/postorius.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
+{ lib, buildPythonPackage, fetchPypi, beautifulsoup4, vcrpy, mock
 , django-mailman3, mailmanclient, readme_renderer
 }:
 
diff --git a/pkgs/servers/mail/postfix/pflogsumm.nix b/pkgs/servers/mail/postfix/pflogsumm.nix
index 1c92a4a76764d..800a69e950960 100644
--- a/pkgs/servers/mail/postfix/pflogsumm.nix
+++ b/pkgs/servers/mail/postfix/pflogsumm.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 
 perlPackages.buildPerlPackage rec {
   pname = "pflogsumm";
diff --git a/pkgs/servers/mail/postgrey/default.nix b/pkgs/servers/mail/postgrey/default.nix
index d0eaf40d06c70..07b351bfb2161 100644
--- a/pkgs/servers/mail/postgrey/default.nix
+++ b/pkgs/servers/mail/postgrey/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perlPackages, lib, runCommand, postfix }:
+{ fetchurl, perlPackages, lib, runCommand, postfix }:
 
 let
     mk-perl-flags = inputs: lib.concatStringsSep " " (map (dep: "-I ${dep}/${perlPackages.perl.libPrefix}") inputs);
diff --git a/pkgs/servers/mail/spamassassin/default.nix b/pkgs/servers/mail/spamassassin/default.nix
index c5980bc8889e6..ff96f0e7c8275 100644
--- a/pkgs/servers/mail/spamassassin/default.nix
+++ b/pkgs/servers/mail/spamassassin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, makeWrapper, gnupg }:
+{ lib, fetchurl, perlPackages, makeWrapper, gnupg }:
 
 perlPackages.buildPerlPackage rec {
   pname = "SpamAssassin";
diff --git a/pkgs/servers/matterbridge/default.nix b/pkgs/servers/matterbridge/default.nix
index df22aab1f9577..6d12ac84d901e 100644
--- a/pkgs/servers/matterbridge/default.nix
+++ b/pkgs/servers/matterbridge/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchurl }:
+{ lib, buildGoModule, fetchurl }:
 
 buildGoModule rec {
   pname = "matterbridge";
diff --git a/pkgs/servers/mattermost/matterircd.nix b/pkgs/servers/mattermost/matterircd.nix
index 36edd851f36fe..3abb728bec1d3 100644
--- a/pkgs/servers/mattermost/matterircd.nix
+++ b/pkgs/servers/mattermost/matterircd.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "matterircd";
diff --git a/pkgs/servers/mautrix-whatsapp/default.nix b/pkgs/servers/mautrix-whatsapp/default.nix
index eea8739292756..a17d8a55acc85 100644
--- a/pkgs/servers/mautrix-whatsapp/default.nix
+++ b/pkgs/servers/mautrix-whatsapp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, olm }:
+{ lib, buildGoModule, fetchFromGitHub, olm }:
 
 buildGoModule rec {
   pname = "mautrix-whatsapp";
diff --git a/pkgs/servers/miniflux/default.nix b/pkgs/servers/miniflux/default.nix
index 55dd3d8afc596..7781124259b6a 100644
--- a/pkgs/servers/miniflux/default.nix
+++ b/pkgs/servers/miniflux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 let
   pname = "miniflux";
diff --git a/pkgs/servers/minio/default.nix b/pkgs/servers/minio/default.nix
index d54232fd7f2e2..9477da8a3f808 100644
--- a/pkgs/servers/minio/default.nix
+++ b/pkgs/servers/minio/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "minio";
diff --git a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
index a696bc413515d..d6a25b3675ffb 100644
--- a/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
+++ b/pkgs/servers/misc/client-ip-echo/client-ip-echo.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib, stdenv }:
+{ mkDerivation, fetchFromGitHub, base, bytestring, network, lib }:
 mkDerivation {
   pname = "client-ip-echo";
   version = "0.1.0.5";
diff --git a/pkgs/servers/monitoring/alertmanager-bot/default.nix b/pkgs/servers/monitoring/alertmanager-bot/default.nix
index 7f4959e58ebee..1eaaf01578feb 100644
--- a/pkgs/servers/monitoring/alertmanager-bot/default.nix
+++ b/pkgs/servers/monitoring/alertmanager-bot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "alertmanager-bot";
diff --git a/pkgs/servers/monitoring/cadvisor/default.nix b/pkgs/servers/monitoring/cadvisor/default.nix
index 6300066492120..8501aa5e02cd4 100644
--- a/pkgs/servers/monitoring/cadvisor/default.nix
+++ b/pkgs/servers/monitoring/cadvisor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "cadvisor";
diff --git a/pkgs/servers/monitoring/consul-alerts/default.nix b/pkgs/servers/monitoring/consul-alerts/default.nix
index 896664658cf11..4cf5f6b80682b 100644
--- a/pkgs/servers/monitoring/consul-alerts/default.nix
+++ b/pkgs/servers/monitoring/consul-alerts/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul-alerts";
diff --git a/pkgs/servers/monitoring/fusion-inventory/default.nix b/pkgs/servers/monitoring/fusion-inventory/default.nix
index 5d825dbe7f268..0034c253c7745 100644
--- a/pkgs/servers/monitoring/fusion-inventory/default.nix
+++ b/pkgs/servers/monitoring/fusion-inventory/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
+{ lib, perlPackages, nix, dmidecode, pciutils, usbutils, iproute, nettools
 , fetchFromGitHub, makeWrapper
 }:
 
diff --git a/pkgs/servers/monitoring/grafana-reporter/default.nix b/pkgs/servers/monitoring/grafana-reporter/default.nix
index 43346e9353f3d..da60be64603e1 100644
--- a/pkgs/servers/monitoring/grafana-reporter/default.nix
+++ b/pkgs/servers/monitoring/grafana-reporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, tetex, makeWrapper }:
 
 with lib;
 
diff --git a/pkgs/servers/monitoring/plugins/esxi.nix b/pkgs/servers/monitoring/plugins/esxi.nix
index 11183dcc2f29e..1ca9e702e7ade 100644
--- a/pkgs/servers/monitoring/plugins/esxi.nix
+++ b/pkgs/servers/monitoring/plugins/esxi.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 let
   bName = "check_esxi_hardware";
diff --git a/pkgs/servers/monitoring/prometheus/alertmanager.nix b/pkgs/servers/monitoring/prometheus/alertmanager.nix
index 19b98124e8e2b..bc3cf7539eceb 100644
--- a/pkgs/servers/monitoring/prometheus/alertmanager.nix
+++ b/pkgs/servers/monitoring/prometheus/alertmanager.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
+{ lib, go, buildGoPackage, fetchFromGitHub, installShellFiles }:
 
 buildGoPackage rec {
   pname = "alertmanager";
diff --git a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
index 648bb59b0d2dd..64105c9c58f26 100644
--- a/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/apcupsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "apcupsd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
index 2548e196837a6..af58a6ebe9475 100644
--- a/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/aws-s3-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-s3-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bind-exporter.nix b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
index 1a86a0e38d9cc..5cfdf61583000 100644
--- a/pkgs/servers/monitoring/prometheus/bind-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bind-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "bind_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/bird-exporter.nix b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
index 5670233b05473..3cb04304e26d8 100644
--- a/pkgs/servers/monitoring/prometheus/bird-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bird-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "bird-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
index 3140056a26967..88ef3f02602cb 100644
--- a/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/blackbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "blackbox_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
index f86c3a42773c8..b3b61567d481b 100644
--- a/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/collectd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "collectd-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/consul-exporter.nix b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
index ab4b67402d395..c3cc7eff90aa3 100644
--- a/pkgs/servers/monitoring/prometheus/consul-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/consul-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "consul_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
index e01417186960c..875db1777fba4 100644
--- a/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dnsmasq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "dnsmasq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
index c0d96b08bb65a..ff7156360a9c5 100644
--- a/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/dovecot-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "dovecot_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
index bc9058e36d97c..cefa4579069f5 100644
--- a/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/fritzbox-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "fritzbox-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
index 718c8f2fcb136..18055f9b06a04 100644
--- a/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/gitlab-ci-pipelines-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gitlab-ci-pipelines-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
index e12c76e09f047..6a42297d502a7 100644
--- a/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/haproxy-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "haproxy_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
index e7ecffee9927a..a551e55b21682 100644
--- a/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/keylight-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "keylight-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
index 1f9c38922ebcc..34a9511d0b579 100644
--- a/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/lnd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "lndmon";
diff --git a/pkgs/servers/monitoring/prometheus/mail-exporter.nix b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
index daad5dc81cd88..2d995ba52932b 100644
--- a/pkgs/servers/monitoring/prometheus/mail-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mail-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles, nixosTests }:
 
 buildGoModule {
   pname = "mailexporter";
diff --git a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
index 0fb7ee4fce326..0fa2bced12559 100644
--- a/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mesos-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mesos_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
index 5044db4b1c148..37f9b0c4e06d7 100644
--- a/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mikrotik-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "mikrotik-exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
index 78642821b9469..93e9bca3283d7 100644
--- a/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/minio-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 buildGoPackage rec {
   pname = "minio-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
index c23d44dca389e..e6178dd52a35e 100644
--- a/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/modemmanager-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "modemmanager-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
index ec181d2e11074..ff32764fcde6d 100644
--- a/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/mysqld-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mysqld_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
index 259b4f752d37f..ee5bafbc7c9ff 100644
--- a/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginx-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
index b15a54c6529ce..fad49d2757513 100644
--- a/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/nginxlog-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "nginxlog_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/node-exporter.nix b/pkgs/servers/monitoring/prometheus/node-exporter.nix
index e2b601f56c143..42ccb91017fc9 100644
--- a/pkgs/servers/monitoring/prometheus/node-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/node-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "node_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
index 8e3daa931ee8f..021905ba9e002 100644
--- a/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/openvpn-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "openvpn_exporter-unstable";
diff --git a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index e3f8b2d44d4ed..a24edd2fbb0d4 100644
--- a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
 , systemd, withSystemdSupport ? true }:
 
 with lib;
diff --git a/pkgs/servers/monitoring/prometheus/process-exporter.nix b/pkgs/servers/monitoring/prometheus/process-exporter.nix
index 5a3c232ac85cd..a147a3c290554 100644
--- a/pkgs/servers/monitoring/prometheus/process-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/process-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "process-exporter";
diff --git a/pkgs/servers/monitoring/prometheus/prom2json.nix b/pkgs/servers/monitoring/prometheus/prom2json.nix
index b333faf0bbdc9..a370bf1f24883 100644
--- a/pkgs/servers/monitoring/prometheus/prom2json.nix
+++ b/pkgs/servers/monitoring/prometheus/prom2json.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "prom2json";
diff --git a/pkgs/servers/monitoring/prometheus/promscale.nix b/pkgs/servers/monitoring/prometheus/promscale.nix
index f4a9070fd84aa..a4ba3cee620d7 100644
--- a/pkgs/servers/monitoring/prometheus/promscale.nix
+++ b/pkgs/servers/monitoring/prometheus/promscale.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/servers/monitoring/prometheus/pushgateway.nix b/pkgs/servers/monitoring/prometheus/pushgateway.nix
index 0d47211005f27..aca2836e1a775 100644
--- a/pkgs/servers/monitoring/prometheus/pushgateway.nix
+++ b/pkgs/servers/monitoring/prometheus/pushgateway.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, go, buildGoPackage, fetchFromGitHub }:
+{ lib, go, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "pushgateway";
diff --git a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
index d9c08f8718dc6..b7832395f626b 100644
--- a/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/rabbitmq-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "rabbitmq_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/redis-exporter.nix b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
index 945f403041c61..34c058d5d6cd6 100644
--- a/pkgs/servers/monitoring/prometheus/redis-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/redis-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "redis_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
index a71b03a2b41d6..ece22e496d12e 100644
--- a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, net-snmp, nixosTests }:
 
 buildGoPackage rec {
   pname = "snmp_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/sql-exporter.nix b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
index 2784dae63aff0..553613a9c7e91 100644
--- a/pkgs/servers/monitoring/prometheus/sql-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/sql-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "sql_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
index a2b0f73904b9a..31bd583280ccd 100644
--- a/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/statsd-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "statsd_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
index 50915bf65f871..39e475df19747 100644
--- a/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/surfboard-exporter.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, nixosTests }:
+{ lib, buildGoPackage, fetchFromGitHub, nixosTests }:
 
 buildGoPackage rec {
   pname = "surfboard_exporter";
diff --git a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
index 669cf8ffaeaef..b9971ab722802 100644
--- a/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
+++ b/pkgs/servers/monitoring/prometheus/unifi-exporter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "unifi-exporter";
diff --git a/pkgs/servers/monitoring/thanos/default.nix b/pkgs/servers/monitoring/thanos/default.nix
index 9955b4a83330c..755dc1517751b 100644
--- a/pkgs/servers/monitoring/thanos/default.nix
+++ b/pkgs/servers/monitoring/thanos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "thanos";
   version = "0.17.2";
diff --git a/pkgs/servers/monitoring/unifi-poller/default.nix b/pkgs/servers/monitoring/unifi-poller/default.nix
index 0343384a6795b..8297503b675e5 100644
--- a/pkgs/servers/monitoring/unifi-poller/default.nix
+++ b/pkgs/servers/monitoring/unifi-poller/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "unifi-poller";
diff --git a/pkgs/servers/nextcloud/news-updater.nix b/pkgs/servers/nextcloud/news-updater.nix
index f4dc2d33d1b0e..19147be3f5da8 100644
--- a/pkgs/servers/nextcloud/news-updater.nix
+++ b/pkgs/servers/nextcloud/news-updater.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, php }:
+{ lib, fetchurl, python3Packages, php }:
 
 python3Packages.buildPythonApplication rec {
   name = "nextcloud-news-updater-${version}";
diff --git a/pkgs/servers/nginx-sso/default.nix b/pkgs/servers/nginx-sso/default.nix
index 0029d9ad55eea..572f4d94e72b6 100644
--- a/pkgs/servers/nginx-sso/default.nix
+++ b/pkgs/servers/nginx-sso/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, nixosTests }:
+{ buildGoPackage, fetchFromGitHub, lib, nixosTests }:
 
 buildGoPackage rec {
   pname = "nginx-sso";
diff --git a/pkgs/servers/nosql/mongodb/v3_4.nix b/pkgs/servers/nosql/mongodb/v3_4.nix
index 2a33b9744a2ad..666a92004b447 100644
--- a/pkgs/servers/nosql/mongodb/v3_4.nix
+++ b/pkgs/servers/nosql/mongodb/v3_4.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
+{ callPackage, lib, sasl, boost, Security, CoreFoundation, cctools }:
 
 let
   buildMongoDB = callPackage ./mongodb.nix {
diff --git a/pkgs/servers/openxpki/default.nix b/pkgs/servers/openxpki/default.nix
index 511ea217328de..bdf12a1f923c7 100644
--- a/pkgs/servers/openxpki/default.nix
+++ b/pkgs/servers/openxpki/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
+{ lib, fetchgit, perl, openssl, perlPackages, gettext, python3Packages
 # TODO: Remove extra dependencies once it is clear that they are NOT needed somewhere.
 , extraDependencies1 ? false, extraDependencies2 ? false, extraDependencies3 ? false }:
 
diff --git a/pkgs/servers/radicale/1.x.nix b/pkgs/servers/radicale/1.x.nix
index 3bfab658af6df..fafeda88975c5 100644
--- a/pkgs/servers/radicale/1.x.nix
+++ b/pkgs/servers/radicale/1.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "radicale";
diff --git a/pkgs/servers/radicale/2.x.nix b/pkgs/servers/radicale/2.x.nix
index 918dad537a532..b0902feeead4d 100644
--- a/pkgs/servers/radicale/2.x.nix
+++ b/pkgs/servers/radicale/2.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "Radicale";
diff --git a/pkgs/servers/routinator/default.nix b/pkgs/servers/routinator/default.nix
index e62ad97538063..4a19932f23e3c 100644
--- a/pkgs/servers/routinator/default.nix
+++ b/pkgs/servers/routinator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "routinator";
diff --git a/pkgs/servers/rtsp-simple-server/default.nix b/pkgs/servers/rtsp-simple-server/default.nix
index d3ec7dc75ee61..cfc35e8528f7a 100644
--- a/pkgs/servers/rtsp-simple-server/default.nix
+++ b/pkgs/servers/rtsp-simple-server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildGoModule
 }:
diff --git a/pkgs/servers/scylladb/default.nix b/pkgs/servers/scylladb/default.nix
index ecc79acfbe73a..2ae3d9f486fb8 100644
--- a/pkgs/servers/scylladb/default.nix
+++ b/pkgs/servers/scylladb/default.nix
@@ -1,5 +1,5 @@
 {
-  lib, stdenv,
+  lib,
   fetchgit,
   python3Packages,
   pkg-config,
diff --git a/pkgs/servers/serf/default.nix b/pkgs/servers/serf/default.nix
index 04cd93c5306e6..8964796862ce6 100644
--- a/pkgs/servers/serf/default.nix
+++ b/pkgs/servers/serf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "serf";
diff --git a/pkgs/servers/sickbeard/sickrage.nix b/pkgs/servers/sickbeard/sickrage.nix
index 7bd971e86e755..43ba82caf768a 100644
--- a/pkgs/servers/sickbeard/sickrage.nix
+++ b/pkgs/servers/sickbeard/sickrage.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2, makeWrapper }:
+{ lib, fetchFromGitHub, python2, makeWrapper }:
 
 python2.pkgs.buildPythonApplication rec {
   pname = "sickrage";
diff --git a/pkgs/servers/simplehttp2server/default.nix b/pkgs/servers/simplehttp2server/default.nix
index bc56053515bf3..d673a201646dc 100644
--- a/pkgs/servers/simplehttp2server/default.nix
+++ b/pkgs/servers/simplehttp2server/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "simplehttp2server";
diff --git a/pkgs/servers/skydns/default.nix b/pkgs/servers/skydns/default.nix
index 587c5d4bda2c7..e6f35124a6fcc 100644
--- a/pkgs/servers/skydns/default.nix
+++ b/pkgs/servers/skydns/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "skydns";
diff --git a/pkgs/servers/slimserver/default.nix b/pkgs/servers/slimserver/default.nix
index 5e1e8544818a7..3e28f5010499d 100644
--- a/pkgs/servers/slimserver/default.nix
+++ b/pkgs/servers/slimserver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, makeWrapper
+{ lib, fetchurl, makeWrapper
 , perlPackages, flac, faad2, sox, lame, monkeysAudio, wavpack }:
 
 perlPackages.buildPerlPackage rec {
diff --git a/pkgs/servers/sql/dolt/default.nix b/pkgs/servers/sql/dolt/default.nix
index b0dc7a2275761..75d341e601e2f 100644
--- a/pkgs/servers/sql/dolt/default.nix
+++ b/pkgs/servers/sql/dolt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, lib, buildGoModule }:
+{ fetchFromGitHub, lib, buildGoModule }:
 
 buildGoModule rec {
     pname = "dolt";
diff --git a/pkgs/servers/tarssh/default.nix b/pkgs/servers/tarssh/default.nix
index bb353dda92895..9240b9c51a283 100644
--- a/pkgs/servers/tarssh/default.nix
+++ b/pkgs/servers/tarssh/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, rustPlatform, lib, stdenv }:
+{ fetchFromGitHub, rustPlatform, lib }:
 
 with rustPlatform;
 
diff --git a/pkgs/servers/tegola/default.nix b/pkgs/servers/tegola/default.nix
index c18bf17a7c7c7..f2161d5d47eac 100644
--- a/pkgs/servers/tegola/default.nix
+++ b/pkgs/servers/tegola/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "tegola";
diff --git a/pkgs/servers/teleport/default.nix b/pkgs/servers/teleport/default.nix
index f89c8f96fcf2a..0b55b82d39e7f 100644
--- a/pkgs/servers/teleport/default.nix
+++ b/pkgs/servers/teleport/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v2.0-dev
-{ lib, stdenv, buildGoPackage, zip, fetchFromGitHub }:
+{ lib, buildGoPackage, zip, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "teleport";
diff --git a/pkgs/servers/traefik/default.nix b/pkgs/servers/traefik/default.nix
index 4ef454d6b5610..340bad6bdc8a7 100644
--- a/pkgs/servers/traefik/default.nix
+++ b/pkgs/servers/traefik/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchzip, buildGoModule, go-bindata, nixosTests }:
+{ lib, fetchzip, buildGoModule, go-bindata, nixosTests }:
 
 buildGoModule rec {
   pname = "traefik";
diff --git a/pkgs/servers/trezord/default.nix b/pkgs/servers/trezord/default.nix
index 03ff9f32fa510..cc0fb0d742175 100644
--- a/pkgs/servers/trezord/default.nix
+++ b/pkgs/servers/trezord/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , trezor-udev-rules
diff --git a/pkgs/servers/trickster/trickster.nix b/pkgs/servers/trickster/trickster.nix
index b99375dbb3d02..5cf08ee6c3cfd 100644
--- a/pkgs/servers/trickster/trickster.nix
+++ b/pkgs/servers/trickster/trickster.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "trickster";
diff --git a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
index 375726a4692ef..1accac5bf6f8e 100644
--- a/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
+++ b/pkgs/servers/tt-rss/plugin-ff-instagram/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation {
   pname = "tt-rss-plugin-ff-instagram";
   version = "git-2019-01-10"; # No release, see https://github.com/wltb/ff_instagram/issues/6
 
diff --git a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
index 987a6d8aaa671..7df8b71759365 100644
--- a/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
+++ b/pkgs/servers/tt-rss/plugin-tumblr-gdpr/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, ... }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub, ... }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-plugin-tumblr-gdpr";
   version = "2.1";
 
diff --git a/pkgs/servers/tt-rss/theme-feedly/default.nix b/pkgs/servers/tt-rss/theme-feedly/default.nix
index 41f47ca4a4ec5..f6882611a25bc 100644
--- a/pkgs/servers/tt-rss/theme-feedly/default.nix
+++ b/pkgs/servers/tt-rss/theme-feedly/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
   pname = "tt-rss-theme-feedly";
   version = "2.5.0";
 
diff --git a/pkgs/servers/udpt/default.nix b/pkgs/servers/udpt/default.nix
index acdfb95272a79..b681727c08f9e 100644
--- a/pkgs/servers/udpt/default.nix
+++ b/pkgs/servers/udpt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "udpt";
diff --git a/pkgs/servers/unpfs/default.nix b/pkgs/servers/unpfs/default.nix
index 818e92f059656..07342c3edbefa 100644
--- a/pkgs/servers/unpfs/default.nix
+++ b/pkgs/servers/unpfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "unpfs";
diff --git a/pkgs/servers/web-apps/morty/default.nix b/pkgs/servers/web-apps/morty/default.nix
index 6b17476623b9e..04f1e14d5ccfb 100644
--- a/pkgs/servers/web-apps/morty/default.nix
+++ b/pkgs/servers/web-apps/morty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "morty";
diff --git a/pkgs/servers/web-apps/shiori/default.nix b/pkgs/servers/web-apps/shiori/default.nix
index 7100c70c0ed8a..b39d7a00cedc8 100644
--- a/pkgs/servers/web-apps/shiori/default.nix
+++ b/pkgs/servers/web-apps/shiori/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "shiori";
diff --git a/pkgs/servers/webmetro/default.nix b/pkgs/servers/webmetro/default.nix
index 316e3a524972d..6bda15a93e004 100644
--- a/pkgs/servers/webmetro/default.nix
+++ b/pkgs/servers/webmetro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "webmetro";
diff --git a/pkgs/servers/x11/xorg/xwayland.nix b/pkgs/servers/x11/xorg/xwayland.nix
index 7fe0e5a9f97f6..e3d2698e8303f 100644
--- a/pkgs/servers/x11/xorg/xwayland.nix
+++ b/pkgs/servers/x11/xorg/xwayland.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
+{ lib, wayland, wayland-protocols, xorgserver, xkbcomp, xkeyboard_config
 , epoxy, libxslt, libunwind, makeWrapper, egl-wayland
 , defaultFontPath ? "" }:
 
diff --git a/pkgs/servers/xandikos/default.nix b/pkgs/servers/xandikos/default.nix
index b8eb29d87b2d7..5241139cfa39d 100644
--- a/pkgs/servers/xandikos/default.nix
+++ b/pkgs/servers/xandikos/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , python3Packages
 , installShellFiles
diff --git a/pkgs/servers/zigbee2mqtt/default.nix b/pkgs/servers/zigbee2mqtt/default.nix
index 550e93fb5aa30..85465fd7d1452 100644
--- a/pkgs/servers/zigbee2mqtt/default.nix
+++ b/pkgs/servers/zigbee2mqtt/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
+{ pkgs, system, dataDir ? "/opt/zigbee2mqtt/data", nixosTests }:
 let
   package = (import ./node.nix { inherit pkgs system; }).package;
 in
diff --git a/pkgs/shells/elvish/default.nix b/pkgs/shells/elvish/default.nix
index 938029e9af97c..82a15edcb263c 100644
--- a/pkgs/shells/elvish/default.nix
+++ b/pkgs/shells/elvish/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "elvish";
diff --git a/pkgs/shells/fish/babelfish.nix b/pkgs/shells/fish/babelfish.nix
index c23e0b1ca9239..368c88aa1bbf1 100644
--- a/pkgs/shells/fish/babelfish.nix
+++ b/pkgs/shells/fish/babelfish.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 buildGoModule rec {
   pname = "babelfish";
   version = "1.0.1";
diff --git a/pkgs/shells/oh/default.nix b/pkgs/shells/oh/default.nix
index 3ea41d7f47286..33e71358b4d5a 100644
--- a/pkgs/shells/oh/default.nix
+++ b/pkgs/shells/oh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchgit, lib }:
+{ buildGoPackage, fetchgit, lib }:
 
 buildGoPackage rec {
   pname = "oh";
diff --git a/pkgs/shells/pash/default.nix b/pkgs/shells/pash/default.nix
index 8b2ac36295984..c7c6e4e5a7d41 100644
--- a/pkgs/shells/pash/default.nix
+++ b/pkgs/shells/pash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildDotnetPackage }:
+{ lib, fetchFromGitHub, buildDotnetPackage }:
 
 buildDotnetPackage {
   baseName = "pash";
diff --git a/pkgs/shells/zsh/zsh-git-prompt/default.nix b/pkgs/shells/zsh/zsh-git-prompt/default.nix
index c0c56570b46d2..7fb2d7861937e 100644
--- a/pkgs/shells/zsh/zsh-git-prompt/default.nix
+++ b/pkgs/shells/zsh/zsh-git-prompt/default.nix
@@ -32,7 +32,7 @@
 }:
 
 haskellPackages.callPackage
-  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck, stdenv }:
+  ({ mkDerivation, base, HUnit, parsec, process, QuickCheck }:
    mkDerivation rec {
      pname = "zsh-git-prompt";
      version = "0.4z";  # While we await a real 0.5 release.
diff --git a/pkgs/test/haskell-shellFor/default.nix b/pkgs/test/haskell-shellFor/default.nix
index 05d09d6f39cf7..9d13e1112cc16 100644
--- a/pkgs/test/haskell-shellFor/default.nix
+++ b/pkgs/test/haskell-shellFor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, haskellPackages, cabal-install }:
+{ lib, haskellPackages, cabal-install }:
 
 (haskellPackages.shellFor {
   packages = p: [ p.database-id-class p.constraints ];
diff --git a/pkgs/test/install-shell-files/default.nix b/pkgs/test/install-shell-files/default.nix
index e9d32e4ccf692..aef5acc1de6bf 100644
--- a/pkgs/test/install-shell-files/default.nix
+++ b/pkgs/test/install-shell-files/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommandLocal, recurseIntoAttrs, installShellFiles }:
+{ lib, runCommandLocal, recurseIntoAttrs, installShellFiles }:
 
 let
   runTest = name: env: buildCommand:
diff --git a/pkgs/tools/X11/arandr/default.nix b/pkgs/tools/X11/arandr/default.nix
index 00296bc54af73..e6f4b5f6ff198 100644
--- a/pkgs/tools/X11/arandr/default.nix
+++ b/pkgs/tools/X11/arandr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages
+{ lib, fetchurl, python3Packages
 , gobject-introspection, gsettings-desktop-schemas, gtk3
 , wrapGAppsHook, xrandr
 }:
diff --git a/pkgs/tools/X11/go-sct/default.nix b/pkgs/tools/X11/go-sct/default.nix
index 2d6965567b7a5..8744c493b71ca 100644
--- a/pkgs/tools/X11/go-sct/default.nix
+++ b/pkgs/tools/X11/go-sct/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, xorg, buildGoPackage, fetchFromGitHub }:
+{ lib, xorg, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "go-sct";
diff --git a/pkgs/tools/X11/grobi/default.nix b/pkgs/tools/X11/grobi/default.nix
index 1ebd8ccc4e4c5..3071ef3178148 100644
--- a/pkgs/tools/X11/grobi/default.nix
+++ b/pkgs/tools/X11/grobi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule, fetchpatch }:
+{ lib, fetchFromGitHub, buildGoModule, fetchpatch }:
 
 buildGoModule rec {
   version = "0.6.0";
diff --git a/pkgs/tools/X11/wpgtk/default.nix b/pkgs/tools/X11/wpgtk/default.nix
index f2864ca2eb5ab..cf9bbd9bb9880 100644
--- a/pkgs/tools/X11/wpgtk/default.nix
+++ b/pkgs/tools/X11/wpgtk/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, libxslt,
+{ lib, python3Packages, fetchFromGitHub, libxslt,
   gobject-introspection, gtk3, wrapGAppsHook, gnome3 }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 0c1accd36fbd3..0dffdf7bbf791 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
+{ lib, fetchurl, callPackage, substituteAll, python3, pkg-config, writeText
 , xorg, gtk3, glib, pango, cairo, gdk-pixbuf, atk
 , wrapGAppsHook, xorgserver, getopt, xauth, util-linux, which
 , ffmpeg, x264, libvpx, libwebp, x265
diff --git a/pkgs/tools/admin/afterburn/default.nix b/pkgs/tools/admin/afterburn/default.nix
index 0d3cd957324b8..8a42a011da902 100644
--- a/pkgs/tools/admin/afterburn/default.nix
+++ b/pkgs/tools/admin/afterburn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
+{ lib, openssl, pkg-config, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "afterburn";
diff --git a/pkgs/tools/admin/aws-nuke/default.nix b/pkgs/tools/admin/aws-nuke/default.nix
index 32c006d7a5ff7..070a9b6430ca0 100644
--- a/pkgs/tools/admin/aws-nuke/default.nix
+++ b/pkgs/tools/admin/aws-nuke/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/admin/aws-rotate-key/default.nix b/pkgs/tools/admin/aws-rotate-key/default.nix
index 4b26e3a743447..82b5773912015 100644
--- a/pkgs/tools/admin/aws-rotate-key/default.nix
+++ b/pkgs/tools/admin/aws-rotate-key/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-rotate-key";
diff --git a/pkgs/tools/admin/awslogs/default.nix b/pkgs/tools/admin/awslogs/default.nix
index f71422f77a259..3e2cf1505579c 100644
--- a/pkgs/tools/admin/awslogs/default.nix
+++ b/pkgs/tools/admin/awslogs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "awslogs";
diff --git a/pkgs/tools/admin/berglas/default.nix b/pkgs/tools/admin/berglas/default.nix
index ca588db01a595..8a6bb559041bb 100644
--- a/pkgs/tools/admin/berglas/default.nix
+++ b/pkgs/tools/admin/berglas/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "berglas";
diff --git a/pkgs/tools/admin/certigo/default.nix b/pkgs/tools/admin/certigo/default.nix
index ff66e926d4b5b..422c6da82d2f0 100644
--- a/pkgs/tools/admin/certigo/default.nix
+++ b/pkgs/tools/admin/certigo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "certigo";
diff --git a/pkgs/tools/admin/chkcrontab/default.nix b/pkgs/tools/admin/chkcrontab/default.nix
index 6404eb92a26eb..bbf8d7eaeb1c1 100644
--- a/pkgs/tools/admin/chkcrontab/default.nix
+++ b/pkgs/tools/admin/chkcrontab/default.nix
@@ -1,4 +1,4 @@
-{ python, lib, stdenv }:
+{ python, lib }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/admin/credhub-cli/default.nix b/pkgs/tools/admin/credhub-cli/default.nix
index 2a1ceb531a50a..55af1679d7add 100644
--- a/pkgs/tools/admin/credhub-cli/default.nix
+++ b/pkgs/tools/admin/credhub-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "credhub-cli";
diff --git a/pkgs/tools/admin/docker-credential-gcr/default.nix b/pkgs/tools/admin/docker-credential-gcr/default.nix
index 2ca0f2c4d0841..7fb128caa19b2 100644
--- a/pkgs/tools/admin/docker-credential-gcr/default.nix
+++ b/pkgs/tools/admin/docker-credential-gcr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "docker-credential-gcr";
diff --git a/pkgs/tools/admin/exoscale-cli/default.nix b/pkgs/tools/admin/exoscale-cli/default.nix
index 3fe3856d9c513..8913bed39d514 100644
--- a/pkgs/tools/admin/exoscale-cli/default.nix
+++ b/pkgs/tools/admin/exoscale-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "exoscale-cli";
diff --git a/pkgs/tools/admin/iamy/default.nix b/pkgs/tools/admin/iamy/default.nix
index e7481e16948f7..dd35da451ad87 100644
--- a/pkgs/tools/admin/iamy/default.nix
+++ b/pkgs/tools/admin/iamy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "iamy";
diff --git a/pkgs/tools/admin/lxd/default.nix b/pkgs/tools/admin/lxd/default.nix
index aeff0d931f058..1c263a1969d16 100644
--- a/pkgs/tools/admin/lxd/default.nix
+++ b/pkgs/tools/admin/lxd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
+{ lib, hwdata, pkg-config, lxc, buildGoPackage, fetchurl
 , makeWrapper, acl, rsync, gnutar, xz, btrfs-progs, gzip, dnsmasq
 , squashfsTools, iproute, iptables, ebtables, iptables-nftables-compat, libcap
 , libco-canonical, dqlite, raft-canonical, sqlite-replication, udev
diff --git a/pkgs/tools/admin/s3bro/default.nix b/pkgs/tools/admin/s3bro/default.nix
index bf807d1499756..35cf7b11e6459 100644
--- a/pkgs/tools/admin/s3bro/default.nix
+++ b/pkgs/tools/admin/s3bro/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s3bro";
diff --git a/pkgs/tools/admin/scaleway-cli/default.nix b/pkgs/tools/admin/scaleway-cli/default.nix
index 0aeccb755a1bb..2a8f0d1f1148f 100644
--- a/pkgs/tools/admin/scaleway-cli/default.nix
+++ b/pkgs/tools/admin/scaleway-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "scaleway-cli";
diff --git a/pkgs/tools/admin/sewer/default.nix b/pkgs/tools/admin/sewer/default.nix
index 42288bafe015c..a6f511fe115aa 100644
--- a/pkgs/tools/admin/sewer/default.nix
+++ b/pkgs/tools/admin/sewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "sewer";
diff --git a/pkgs/tools/admin/simp_le/default.nix b/pkgs/tools/admin/simp_le/default.nix
index fc064641943ad..5bfc00ac00011 100644
--- a/pkgs/tools/admin/simp_le/default.nix
+++ b/pkgs/tools/admin/simp_le/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, bash }:
+{ lib, python3Packages, bash }:
 
 python3Packages.buildPythonApplication rec {
   pname = "simp_le-client";
diff --git a/pkgs/tools/admin/ssh-import-id/default.nix b/pkgs/tools/admin/ssh-import-id/default.nix
index 6c8520648ec67..b6ca3135f5615 100644
--- a/pkgs/tools/admin/ssh-import-id/default.nix
+++ b/pkgs/tools/admin/ssh-import-id/default.nix
@@ -1,5 +1,5 @@
 { buildPythonPackage
-, lib, stdenv
+, lib
 , fetchgit
 , requests
 , makeWrapper
diff --git a/pkgs/tools/admin/ssmsh/default.nix b/pkgs/tools/admin/ssmsh/default.nix
index 6b0d038090158..8ed8b0b812b00 100644
--- a/pkgs/tools/admin/ssmsh/default.nix
+++ b/pkgs/tools/admin/ssmsh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "ssmsh";
diff --git a/pkgs/tools/admin/stripe-cli/default.nix b/pkgs/tools/admin/stripe-cli/default.nix
index c410bd81e89a3..309bf4803fb60 100644
--- a/pkgs/tools/admin/stripe-cli/default.nix
+++ b/pkgs/tools/admin/stripe-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "stripe-cli";
diff --git a/pkgs/tools/audio/beets/plugins/alternatives.nix b/pkgs/tools/audio/beets/plugins/alternatives.nix
index a64cc5ebcada8..793611699ec8c 100644
--- a/pkgs/tools/audio/beets/plugins/alternatives.nix
+++ b/pkgs/tools/audio/beets/plugins/alternatives.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages }:
+{ fetchFromGitHub, beets, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "beets-alternatives";
diff --git a/pkgs/tools/audio/beets/plugins/check.nix b/pkgs/tools/audio/beets/plugins/check.nix
index 545e6d7cf2c7b..441dcfe579f49 100644
--- a/pkgs/tools/audio/beets/plugins/check.nix
+++ b/pkgs/tools/audio/beets/plugins/check.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
+{ lib, fetchFromGitHub, beets, pythonPackages, flac, liboggz, mp3val }:
 
 pythonPackages.buildPythonApplication rec {
   name = "beets-check";
diff --git a/pkgs/tools/audio/beets/plugins/copyartifacts.nix b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
index b339bc34ad207..5af52066caa78 100644
--- a/pkgs/tools/audio/beets/plugins/copyartifacts.nix
+++ b/pkgs/tools/audio/beets/plugins/copyartifacts.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, beets, pythonPackages, glibcLocales }:
+{ fetchFromGitHub, beets, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication {
   name = "beets-copyartifacts";
diff --git a/pkgs/tools/audio/mididings/default.nix b/pkgs/tools/audio/mididings/default.nix
index eedfd2f3dbbee..d5f78ada91c70 100644
--- a/pkgs/tools/audio/mididings/default.nix
+++ b/pkgs/tools/audio/mididings/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
+{ lib, pythonPackages, fetchFromGitHub, pkg-config, glib, alsaLib, libjack2  }:
 
 pythonPackages.buildPythonApplication {
   version = "2015-11-17";
diff --git a/pkgs/tools/audio/mpd-mpris/default.nix b/pkgs/tools/audio/mpd-mpris/default.nix
index 801058e0496bf..af4000dfa4489 100644
--- a/pkgs/tools/audio/mpd-mpris/default.nix
+++ b/pkgs/tools/audio/mpd-mpris/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "mpd-mpris";
diff --git a/pkgs/tools/audio/mpdris2/default.nix b/pkgs/tools/audio/mpdris2/default.nix
index 30b0d90f56232..4cd3921fb5509 100644
--- a/pkgs/tools/audio/mpdris2/default.nix
+++ b/pkgs/tools/audio/mpdris2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , autoreconfHook
 , fetchFromGitHub
 , glib
diff --git a/pkgs/tools/audio/opl3bankeditor/default.nix b/pkgs/tools/audio/opl3bankeditor/default.nix
index c79204cffa2a7..48f553d960dc3 100644
--- a/pkgs/tools/audio/opl3bankeditor/default.nix
+++ b/pkgs/tools/audio/opl3bankeditor/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, qttools, alsaLib }:
 
 mkDerivation rec {
   version = "1.5.1";
diff --git a/pkgs/tools/audio/video2midi/default.nix b/pkgs/tools/audio/video2midi/default.nix
index 3ce76fb61fae3..4eafd7f52e1f8 100644
--- a/pkgs/tools/audio/video2midi/default.nix
+++ b/pkgs/tools/audio/video2midi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, opencv3 }:
+{ lib, fetchFromGitHub, pythonPackages, opencv3 }:
 
 let
   opencv3_ = pythonPackages.toPythonModule (opencv3.override {
diff --git a/pkgs/tools/audio/volctl/default.nix b/pkgs/tools/audio/volctl/default.nix
index 06b6079bde244..d05257f1d083f 100644
--- a/pkgs/tools/audio/volctl/default.nix
+++ b/pkgs/tools/audio/volctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
+{ lib, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
 
 python3Packages.buildPythonApplication rec {
   pname = "volctl";
diff --git a/pkgs/tools/backup/bupstash/default.nix b/pkgs/tools/backup/bupstash/default.nix
index 76a3d674ecbf7..9ed70491fb32f 100644
--- a/pkgs/tools/backup/bupstash/default.nix
+++ b/pkgs/tools/backup/bupstash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
+{ lib, fetchFromGitHub, installShellFiles, rustPlatform, ronn, pkg-config, libsodium }:
 rustPlatform.buildRustPackage rec {
   pname = "bupstash";
   version = "0.6.4";
diff --git a/pkgs/tools/backup/diskrsync/default.nix b/pkgs/tools/backup/diskrsync/default.nix
index d70efa1d2248f..3b5d901daf0c6 100644
--- a/pkgs/tools/backup/diskrsync/default.nix
+++ b/pkgs/tools/backup/diskrsync/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, lib, stdenv, openssh, makeWrapper }:
+{ buildGoPackage, fetchFromGitHub, lib, openssh, makeWrapper }:
 
 buildGoPackage rec {
   pname = "diskrsync";
diff --git a/pkgs/tools/backup/grab-site/default.nix b/pkgs/tools/backup/grab-site/default.nix
index 2ef3b5f54209a..2f2f01356b479 100644
--- a/pkgs/tools/backup/grab-site/default.nix
+++ b/pkgs/tools/backup/grab-site/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python37, fetchFromGitHub }:
+{ lib, python37, fetchFromGitHub }:
 let
   python = python37.override {
     self = python;
diff --git a/pkgs/tools/backup/httrack/qt.nix b/pkgs/tools/backup/httrack/qt.nix
index 736dfdb557d98..2a7c4ff517684 100644
--- a/pkgs/tools/backup/httrack/qt.nix
+++ b/pkgs/tools/backup/httrack/qt.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl, cmake, pkg-config, makeWrapper
+{ mkDerivation, lib, fetchurl, cmake, pkg-config, makeWrapper
 , httrack, qtbase, qtmultimedia }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/backup/iceshelf/default.nix b/pkgs/tools/backup/iceshelf/default.nix
index eb5e883bdacf1..c066cb766951d 100644
--- a/pkgs/tools/backup/iceshelf/default.nix
+++ b/pkgs/tools/backup/iceshelf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, git, awscli, python3 }:
+{ lib, fetchFromGitHub, git, awscli, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "iceshelf";
diff --git a/pkgs/tools/backup/luckybackup/default.nix b/pkgs/tools/backup/luckybackup/default.nix
index 5a67bea41ea6f..a8f88e88b0e22 100644
--- a/pkgs/tools/backup/luckybackup/default.nix
+++ b/pkgs/tools/backup/luckybackup/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchurl
+{ mkDerivation, lib, fetchurl
 , pkg-config, libtool, qmake
 , rsync, ssh
 }:
diff --git a/pkgs/tools/backup/rdiff-backup/default.nix b/pkgs/tools/backup/rdiff-backup/default.nix
index f55f163dafb01..0d24e3df72063 100644
--- a/pkgs/tools/backup/rdiff-backup/default.nix
+++ b/pkgs/tools/backup/rdiff-backup/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, python2Packages, librsync, gnused }:
+{lib, fetchurl, python2Packages, librsync, gnused }:
 
 python2Packages.buildPythonApplication {
   name = "rdiff-backup-1.3.3";
diff --git a/pkgs/tools/backup/s3ql/default.nix b/pkgs/tools/backup/s3ql/default.nix
index 74b90236c4e96..70394afb50e49 100644
--- a/pkgs/tools/backup/s3ql/default.nix
+++ b/pkgs/tools/backup/s3ql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, sqlite, which }:
+{ lib, fetchFromGitHub, python3Packages, sqlite, which }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s3ql";
diff --git a/pkgs/tools/backup/ugarit-manifest-maker/default.nix b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
index 99ddd62e6ae21..8c37a7b72ac73 100644
--- a/pkgs/tools/backup/ugarit-manifest-maker/default.nix
+++ b/pkgs/tools/backup/ugarit-manifest-maker/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/ugarit/default.nix b/pkgs/tools/backup/ugarit/default.nix
index 938c24f38ce16..39c11cc0c91a1 100644
--- a/pkgs/tools/backup/ugarit/default.nix
+++ b/pkgs/tools/backup/ugarit/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, stdenv, eggDerivation, fetchegg }:
+{ pkgs, lib, eggDerivation, fetchegg }:
 let
   eggs = import ./eggs.nix { inherit eggDerivation fetchegg; };
 in with pkgs; eggDerivation rec {
diff --git a/pkgs/tools/backup/wal-e/default.nix b/pkgs/tools/backup/wal-e/default.nix
index 0ed2bf1bf8bf1..8e54b58e20172 100644
--- a/pkgs/tools/backup/wal-e/default.nix
+++ b/pkgs/tools/backup/wal-e/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages, lzop, postgresql, pv }:
+{ lib, fetchurl, python3Packages, lzop, postgresql, pv }:
 
 python3Packages.buildPythonApplication rec {
   pname = "wal-e";
diff --git a/pkgs/tools/backup/zfs-replicate/default.nix b/pkgs/tools/backup/zfs-replicate/default.nix
index 02e3c19f00462..c167ad1fa0188 100644
--- a/pkgs/tools/backup/zfs-replicate/default.nix
+++ b/pkgs/tools/backup/zfs-replicate/default.nix
@@ -1,5 +1,5 @@
 { buildPythonApplication, click, fetchPypi, hypothesis, mypy, pytest
-, pytestcov, pytestrunner, lib, stdenv, stringcase
+, pytestcov, pytestrunner, lib, stringcase
 }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/cd-dvd/isolyzer/default.nix b/pkgs/tools/cd-dvd/isolyzer/default.nix
index 477fa337da84b..c175eb45aa0da 100644
--- a/pkgs/tools/cd-dvd/isolyzer/default.nix
+++ b/pkgs/tools/cd-dvd/isolyzer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/compression/dtrx/default.nix b/pkgs/tools/compression/dtrx/default.nix
index 0abea9b128548..91d59a4de0f8f 100644
--- a/pkgs/tools/compression/dtrx/default.nix
+++ b/pkgs/tools/compression/dtrx/default.nix
@@ -1,4 +1,4 @@
-{stdenv, lib, fetchurl, pythonPackages
+{ lib, fetchurl, pythonPackages
 , gnutar, unzip, lhasa, rpm, binutils, cpio, gzip, p7zip, cabextract, unrar, unshield
 , bzip2, xz, lzip
 # unzip is handled by p7zip
diff --git a/pkgs/tools/filesystems/android-file-transfer/default.nix b/pkgs/tools/filesystems/android-file-transfer/default.nix
index 68199a0938eb6..f0efaaa323165 100644
--- a/pkgs/tools/filesystems/android-file-transfer/default.nix
+++ b/pkgs/tools/filesystems/android-file-transfer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
+{ lib, mkDerivation, fetchFromGitHub, cmake, fuse, readline, pkg-config, qtbase, qttools }:
 
 mkDerivation rec {
   pname = "android-file-transfer";
diff --git a/pkgs/tools/filesystems/catcli/default.nix b/pkgs/tools/filesystems/catcli/default.nix
index 8f4e9941029b9..2f179a151d1ee 100644
--- a/pkgs/tools/filesystems/catcli/default.nix
+++ b/pkgs/tools/filesystems/catcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , buildPythonApplication
 , docopt, anytree
diff --git a/pkgs/tools/filesystems/convoy/default.nix b/pkgs/tools/filesystems/convoy/default.nix
index 4c493ea225276..774568fdde17a 100644
--- a/pkgs/tools/filesystems/convoy/default.nix
+++ b/pkgs/tools/filesystems/convoy/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, lvm2 }:
+{ lib, buildGoPackage, fetchFromGitHub, lvm2 }:
 
 buildGoPackage rec {
   pname = "convoy";
diff --git a/pkgs/tools/filesystems/gitfs/default.nix b/pkgs/tools/filesystems/gitfs/default.nix
index 1d1863ede968e..e4a120264fd81 100644
--- a/pkgs/tools/filesystems/gitfs/default.nix
+++ b/pkgs/tools/filesystems/gitfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "gitfs";
diff --git a/pkgs/tools/filesystems/gocryptfs/default.nix b/pkgs/tools/filesystems/gocryptfs/default.nix
index 318e39e8322e9..b8b330c129a0a 100644
--- a/pkgs/tools/filesystems/gocryptfs/default.nix
+++ b/pkgs/tools/filesystems/gocryptfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/filesystems/nixpart/default.nix b/pkgs/tools/filesystems/nixpart/default.nix
index 3a63ad9747fee..80ae8ca2b3cd4 100644
--- a/pkgs/tools/filesystems/nixpart/default.nix
+++ b/pkgs/tools/filesystems/nixpart/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, blivet }:
+{ lib, fetchurl, buildPythonApplication, blivet }:
 
 buildPythonApplication rec {
   pname = "nixpart";
diff --git a/pkgs/tools/filesystems/sandboxfs/default.nix b/pkgs/tools/filesystems/sandboxfs/default.nix
index 8777fa50a5d87..32d186344dd72 100644
--- a/pkgs/tools/filesystems/sandboxfs/default.nix
+++ b/pkgs/tools/filesystems/sandboxfs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 , fuse
diff --git a/pkgs/tools/filesystems/tmsu/default.nix b/pkgs/tools/filesystems/tmsu/default.nix
index 7129de950136b..1eac3e03ec926 100644
--- a/pkgs/tools/filesystems/tmsu/default.nix
+++ b/pkgs/tools/filesystems/tmsu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
+{ lib, buildGoPackage, fetchFromGitHub, fuse, installShellFiles }:
 
 buildGoPackage rec {
   pname = "tmsu";
diff --git a/pkgs/tools/filesystems/ubidump/default.nix b/pkgs/tools/filesystems/ubidump/default.nix
index 2787b87964fd1..6a6409ad3251c 100644
--- a/pkgs/tools/filesystems/ubidump/default.nix
+++ b/pkgs/tools/filesystems/ubidump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, makeWrapper }:
+{ lib, fetchFromGitHub, python3, makeWrapper }:
 
 python3.pkgs.buildPythonApplication rec {
 
diff --git a/pkgs/tools/graphics/feedgnuplot/default.nix b/pkgs/tools/graphics/feedgnuplot/default.nix
index 1fe254d77857f..02bb022dfb470 100644
--- a/pkgs/tools/graphics/feedgnuplot/default.nix
+++ b/pkgs/tools/graphics/feedgnuplot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, gawk
+{ lib, fetchFromGitHub, makeWrapper, gawk
 , makeFontsConf, freefont_ttf, gnuplot, perl, perlPackages
 }:
 
diff --git a/pkgs/tools/graphics/gifski/default.nix b/pkgs/tools/graphics/gifski/default.nix
index 0ce24482164e4..95af281d7eab3 100644
--- a/pkgs/tools/graphics/gifski/default.nix
+++ b/pkgs/tools/graphics/gifski/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "gifski";
diff --git a/pkgs/tools/graphics/graph-easy/default.nix b/pkgs/tools/graphics/graph-easy/default.nix
index 4ae68207aaec2..341d6dea90ac9 100644
--- a/pkgs/tools/graphics/graph-easy/default.nix
+++ b/pkgs/tools/graphics/graph-easy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, perlPackages, fetchurl }:
+{ lib, perlPackages, fetchurl }:
 
 perlPackages.buildPerlPackage {
   pname = "Graph-Easy";
diff --git a/pkgs/tools/graphics/ldgallery/compiler/default.nix b/pkgs/tools/graphics/ldgallery/compiler/default.nix
index 000f227075edf..9316e9d38e04b 100644
--- a/pkgs/tools/graphics/ldgallery/compiler/default.nix
+++ b/pkgs/tools/graphics/ldgallery/compiler/default.nix
@@ -1,7 +1,7 @@
 # generated with cabal2nix by ./generate.sh
 { mkDerivation, aeson, base, cmdargs, containers, data-ordlist
 , directory, fetchgit, filepath, Glob, hpack, parallel-io, process
-, safe, lib, stdenv, text, time, yaml
+, safe, lib, text, time, yaml
 }:
 mkDerivation {
   pname = "ldgallery-compiler";
diff --git a/pkgs/tools/graphics/pdfredacttools/default.nix b/pkgs/tools/graphics/pdfredacttools/default.nix
index 71d927913c366..0a1cc111b5414 100644
--- a/pkgs/tools/graphics/pdfredacttools/default.nix
+++ b/pkgs/tools/graphics/pdfredacttools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
+{ lib, fetchFromGitHub, python2Packages, imagemagick, exiftool, file, ghostscript }:
 
 python2Packages.buildPythonApplication rec {
   pname = "pdf-redact-tools";
diff --git a/pkgs/tools/graphics/puppeteer-cli/default.nix b/pkgs/tools/graphics/puppeteer-cli/default.nix
index c01ee232fa7b6..20dab27ddf07e 100644
--- a/pkgs/tools/graphics/puppeteer-cli/default.nix
+++ b/pkgs/tools/graphics/puppeteer-cli/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, makeWrapper, stdenv, chromium, mkYarnPackage
+{ fetchFromGitHub, makeWrapper, chromium, mkYarnPackage
 }:
 
 mkYarnPackage rec {
diff --git a/pkgs/tools/graphics/rocket/default.nix b/pkgs/tools/graphics/rocket/default.nix
index ec32d6c7140f4..070e359fe1c52 100644
--- a/pkgs/tools/graphics/rocket/default.nix
+++ b/pkgs/tools/graphics/rocket/default.nix
@@ -1,4 +1,4 @@
-{ mkDerivation, lib, stdenv, fetchFromGitHub, qmake, qtbase }:
+{ mkDerivation, lib, fetchFromGitHub, qmake, qtbase }:
 
 mkDerivation {
   pname = "rocket";
diff --git a/pkgs/tools/graphics/shotgun/default.nix b/pkgs/tools/graphics/shotgun/default.nix
index 3c96584029e7c..79ddd39ea792a 100644
--- a/pkgs/tools/graphics/shotgun/default.nix
+++ b/pkgs/tools/graphics/shotgun/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, libXrandr, libX11 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "shotgun";
diff --git a/pkgs/tools/graphics/svgcleaner/default.nix b/pkgs/tools/graphics/svgcleaner/default.nix
index 653e585c6ed6f..6c5e8569e853e 100644
--- a/pkgs/tools/graphics/svgcleaner/default.nix
+++ b/pkgs/tools/graphics/svgcleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "svgcleaner";
diff --git a/pkgs/tools/inputmethods/evdevremapkeys/default.nix b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
index 99f7231c58a4f..73344ca269005 100644
--- a/pkgs/tools/inputmethods/evdevremapkeys/default.nix
+++ b/pkgs/tools/inputmethods/evdevremapkeys/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "evdevremapkeys";
diff --git a/pkgs/tools/inputmethods/evscript/default.nix b/pkgs/tools/inputmethods/evscript/default.nix
index 01f312fa63d67..66f264bc7a362 100644
--- a/pkgs/tools/inputmethods/evscript/default.nix
+++ b/pkgs/tools/inputmethods/evscript/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "evscript";
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
index 923fd7c7a74ed..6d3952c9c225c 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-chinese-addons.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchurl
 , fetchFromGitHub
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
index ba006873c40af..b133d576c6cca 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-configtool.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
index 155f10fae26e5..bfb06a98e8fdd 100644
--- a/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
+++ b/pkgs/tools/inputmethods/fcitx5/fcitx5-qt.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , mkDerivation
 , fetchFromGitHub
 , cmake
diff --git a/pkgs/tools/inputmethods/ibus/wrapper.nix b/pkgs/tools/inputmethods/ibus/wrapper.nix
index 74426b2b04ed1..93078325a0d20 100644
--- a/pkgs/tools/inputmethods/ibus/wrapper.nix
+++ b/pkgs/tools/inputmethods/ibus/wrapper.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runCommand, makeWrapper, lndir
+{ lib, runCommand, makeWrapper, lndir
 , dconf, hicolor-icon-theme, ibus, librsvg, plugins ? []
 }:
 
diff --git a/pkgs/tools/misc/3mux/default.nix b/pkgs/tools/misc/3mux/default.nix
index 3f1e981fd0e32..3c51210edc7a9 100644
--- a/pkgs/tools/misc/3mux/default.nix
+++ b/pkgs/tools/misc/3mux/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "3mux";
diff --git a/pkgs/tools/misc/adafruit-ampy/default.nix b/pkgs/tools/misc/adafruit-ampy/default.nix
index f514973763931..c9466f54a6216 100644
--- a/pkgs/tools/misc/adafruit-ampy/default.nix
+++ b/pkgs/tools/misc/adafruit-ampy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/apt-offline/default.nix b/pkgs/tools/misc/apt-offline/default.nix
index 5c17b7f2d1313..9c952cc7c3029 100644
--- a/pkgs/tools/misc/apt-offline/default.nix
+++ b/pkgs/tools/misc/apt-offline/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.8.1";
diff --git a/pkgs/tools/misc/aptly/default.nix b/pkgs/tools/misc/aptly/default.nix
index 369f7dd219f47..7f82aebabe4a2 100644
--- a/pkgs/tools/misc/aptly/default.nix
+++ b/pkgs/tools/misc/aptly/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
+{ lib, buildGoPackage, fetchFromGitHub, installShellFiles, makeWrapper, gnupg, bzip2, xz, graphviz }:
 
 let
 
diff --git a/pkgs/tools/misc/asciinema-scenario/default.nix b/pkgs/tools/misc/asciinema-scenario/default.nix
index 25bac97684382..f699166211466 100644
--- a/pkgs/tools/misc/asciinema-scenario/default.nix
+++ b/pkgs/tools/misc/asciinema-scenario/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchCrate
 }:
diff --git a/pkgs/tools/misc/azure-vhd-utils/default.nix b/pkgs/tools/misc/azure-vhd-utils/default.nix
index f8a17790ba196..ad48eae7a87f6 100644
--- a/pkgs/tools/misc/azure-vhd-utils/default.nix
+++ b/pkgs/tools/misc/azure-vhd-utils/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "azure-vhd-utils";
diff --git a/pkgs/tools/misc/bashplotlib/default.nix b/pkgs/tools/misc/bashplotlib/default.nix
index cc3476f598b7d..44d7e93355bb7 100644
--- a/pkgs/tools/misc/bashplotlib/default.nix
+++ b/pkgs/tools/misc/bashplotlib/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "bashplotlib";
diff --git a/pkgs/tools/misc/bmap-tools/default.nix b/pkgs/tools/misc/bmap-tools/default.nix
index ed42f31f26b3e..79094dc9540a7 100644
--- a/pkgs/tools/misc/bmap-tools/default.nix
+++ b/pkgs/tools/misc/bmap-tools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "bmap-tools";
diff --git a/pkgs/tools/misc/bonfire/default.nix b/pkgs/tools/misc/bonfire/default.nix
index cda58e80d87c6..a3f1608c3ad12 100644
--- a/pkgs/tools/misc/bonfire/default.nix
+++ b/pkgs/tools/misc/bonfire/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/broadlink-cli/default.nix b/pkgs/tools/misc/broadlink-cli/default.nix
index 53925b8759167..cb5f582d2dec2 100644
--- a/pkgs/tools/misc/broadlink-cli/default.nix
+++ b/pkgs/tools/misc/broadlink-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication {
   pname = "broadlink-cli";
diff --git a/pkgs/tools/misc/chezmoi/default.nix b/pkgs/tools/misc/chezmoi/default.nix
index 15a2a643d32d2..48d8b7c89301b 100644
--- a/pkgs/tools/misc/chezmoi/default.nix
+++ b/pkgs/tools/misc/chezmoi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "chezmoi";
diff --git a/pkgs/tools/misc/ckb-next/default.nix b/pkgs/tools/misc/ckb-next/default.nix
index 6c13c3bbe6ae2..9c6909d445d99 100644
--- a/pkgs/tools/misc/ckb-next/default.nix
+++ b/pkgs/tools/misc/ckb-next/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, substituteAll, udev
+{ lib, mkDerivation, fetchFromGitHub, substituteAll, udev
 , pkg-config, qtbase, cmake, zlib, kmod }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/claws/default.nix b/pkgs/tools/misc/claws/default.nix
index 20c8cc7af8f55..c28272e8bfa54 100644
--- a/pkgs/tools/misc/claws/default.nix
+++ b/pkgs/tools/misc/claws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "claws";
diff --git a/pkgs/tools/misc/cloud-sql-proxy/default.nix b/pkgs/tools/misc/cloud-sql-proxy/default.nix
index 11bfdc508ebc8..552ea140d6089 100644
--- a/pkgs/tools/misc/cloud-sql-proxy/default.nix
+++ b/pkgs/tools/misc/cloud-sql-proxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "cloud-sql-proxy";
diff --git a/pkgs/tools/misc/code-minimap/default.nix b/pkgs/tools/misc/code-minimap/default.nix
index 0ccfe42464587..4808fe3ef564b 100644
--- a/pkgs/tools/misc/code-minimap/default.nix
+++ b/pkgs/tools/misc/code-minimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/misc/codebraid/default.nix b/pkgs/tools/misc/codebraid/default.nix
index a855dac5f124b..0ecde80c238d6 100644
--- a/pkgs/tools/misc/codebraid/default.nix
+++ b/pkgs/tools/misc/codebraid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "codebraid";
diff --git a/pkgs/tools/misc/crudini/default.nix b/pkgs/tools/misc/crudini/default.nix
index a4b499a632354..6527a01e43b7b 100644
--- a/pkgs/tools/misc/crudini/default.nix
+++ b/pkgs/tools/misc/crudini/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
+{ lib, fetchFromGitHub, python3Packages, help2man, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "crudini";
diff --git a/pkgs/tools/misc/dashing/default.nix b/pkgs/tools/misc/dashing/default.nix
index 546daef5ecbd5..496639ec07a58 100644
--- a/pkgs/tools/misc/dashing/default.nix
+++ b/pkgs/tools/misc/dashing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "dashing";
diff --git a/pkgs/tools/misc/diskonaut/default.nix b/pkgs/tools/misc/diskonaut/default.nix
index 6c295eb00e824..0fb3168517023 100644
--- a/pkgs/tools/misc/diskonaut/default.nix
+++ b/pkgs/tools/misc/diskonaut/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "diskonaut";
diff --git a/pkgs/tools/misc/docker-ls/default.nix b/pkgs/tools/misc/docker-ls/default.nix
index df9755f863da6..b84830681174c 100644
--- a/pkgs/tools/misc/docker-ls/default.nix
+++ b/pkgs/tools/misc/docker-ls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, lib, stdenv, docker }:
+{ buildGoModule, fetchFromGitHub, lib, docker }:
 
 buildGoModule rec {
   pname = "docker-ls";
diff --git a/pkgs/tools/misc/docui/default.nix b/pkgs/tools/misc/docui/default.nix
index e4934853e825e..a1b2ad662bc6c 100644
--- a/pkgs/tools/misc/docui/default.nix
+++ b/pkgs/tools/misc/docui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "docui";
diff --git a/pkgs/tools/misc/doitlive/default.nix b/pkgs/tools/misc/doitlive/default.nix
index 313dc9935faf0..9edc078d9f9ca 100644
--- a/pkgs/tools/misc/doitlive/default.nix
+++ b/pkgs/tools/misc/doitlive/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "doitlive";
diff --git a/pkgs/tools/misc/dust/default.nix b/pkgs/tools/misc/dust/default.nix
index c40753dcf99a2..7997f2119a28e 100644
--- a/pkgs/tools/misc/dust/default.nix
+++ b/pkgs/tools/misc/dust/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "du-dust";
diff --git a/pkgs/tools/misc/envdir-go/default.nix b/pkgs/tools/misc/envdir-go/default.nix
index 7ec763f16c6e6..eafc71030ac84 100644
--- a/pkgs/tools/misc/envdir-go/default.nix
+++ b/pkgs/tools/misc/envdir-go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.0.0";
diff --git a/pkgs/tools/misc/esptool/default.nix b/pkgs/tools/misc/esptool/default.nix
index 89be1da8cc98c..7c7f91621b824 100644
--- a/pkgs/tools/misc/esptool/default.nix
+++ b/pkgs/tools/misc/esptool/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, openssl }:
+{ lib, fetchFromGitHub, python3, openssl }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "esptool";
diff --git a/pkgs/tools/misc/eva/default.nix b/pkgs/tools/misc/eva/default.nix
index 65da084f84190..253e815008a74 100644
--- a/pkgs/tools/misc/eva/default.nix
+++ b/pkgs/tools/misc/eva/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, fetchpatch }:
+{ lib, fetchFromGitHub, rustPlatform, fetchpatch }:
 
 rustPlatform.buildRustPackage rec {
   pname = "eva";
diff --git a/pkgs/tools/misc/fselect/default.nix b/pkgs/tools/misc/fselect/default.nix
index 1076c44a1bb37..7416961e84e86 100644
--- a/pkgs/tools/misc/fselect/default.nix
+++ b/pkgs/tools/misc/fselect/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, installShellFiles }:
+{ lib, fetchFromGitHub, rustPlatform, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "fselect";
diff --git a/pkgs/tools/misc/fsql/default.nix b/pkgs/tools/misc/fsql/default.nix
index 8e113ee871a16..100e702323210 100644
--- a/pkgs/tools/misc/fsql/default.nix
+++ b/pkgs/tools/misc/fsql/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "fsql";
diff --git a/pkgs/tools/misc/g933-utils/default.nix b/pkgs/tools/misc/g933-utils/default.nix
index 9cb056097726f..7fbfadfac76de 100644
--- a/pkgs/tools/misc/g933-utils/default.nix
+++ b/pkgs/tools/misc/g933-utils/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, udev, pkg-config }:
+{ lib, fetchFromGitHub, rustPlatform, udev, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "g933-utils";
diff --git a/pkgs/tools/misc/gawp/default.nix b/pkgs/tools/misc/gawp/default.nix
index d518ba88fb6c8..5c7953a766ee8 100644
--- a/pkgs/tools/misc/gawp/default.nix
+++ b/pkgs/tools/misc/gawp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 with builtins;
 
diff --git a/pkgs/tools/misc/gh-ost/default.nix b/pkgs/tools/misc/gh-ost/default.nix
index 6096dac962219..dd28ddfaff556 100644
--- a/pkgs/tools/misc/gh-ost/default.nix
+++ b/pkgs/tools/misc/gh-ost/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gh-ost";
diff --git a/pkgs/tools/misc/gif-for-cli/default.nix b/pkgs/tools/misc/gif-for-cli/default.nix
index e82cafdd64cd0..bbb1b8b96402e 100644
--- a/pkgs/tools/misc/gif-for-cli/default.nix
+++ b/pkgs/tools/misc/gif-for-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
+{ lib, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
 
 python3Packages.buildPythonApplication {
   pname = "gif-for-cli";
diff --git a/pkgs/tools/misc/git-town/default.nix b/pkgs/tools/misc/git-town/default.nix
index cf3a6aba19f01..56f9452db7b72 100644
--- a/pkgs/tools/misc/git-town/default.nix
+++ b/pkgs/tools/misc/git-town/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "git-town";
diff --git a/pkgs/tools/misc/go.rice/default.nix b/pkgs/tools/misc/go.rice/default.nix
index 26b082e43b39c..295bf0102796f 100644
--- a/pkgs/tools/misc/go.rice/default.nix
+++ b/pkgs/tools/misc/go.rice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "go.rice";
diff --git a/pkgs/tools/misc/gosu/default.nix b/pkgs/tools/misc/gosu/default.nix
index 7bc7eab345627..033883ab1c8c1 100644
--- a/pkgs/tools/misc/gosu/default.nix
+++ b/pkgs/tools/misc/gosu/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "gosu";
diff --git a/pkgs/tools/misc/grc/default.nix b/pkgs/tools/misc/grc/default.nix
index 3188dcdafbf3a..8fe35012090df 100644
--- a/pkgs/tools/misc/grc/default.nix
+++ b/pkgs/tools/misc/grc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "grc";
diff --git a/pkgs/tools/misc/hacksaw/default.nix b/pkgs/tools/misc/hacksaw/default.nix
index a0e884e82d907..419cff20087f3 100644
--- a/pkgs/tools/misc/hacksaw/default.nix
+++ b/pkgs/tools/misc/hacksaw/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
+{ lib, fetchCrate, rustPlatform, pkg-config, libXrandr, libX11, python3 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "hacksaw";
diff --git a/pkgs/tools/misc/heatseeker/default.nix b/pkgs/tools/misc/heatseeker/default.nix
index 13933c6c28a67..9d50530df4716 100644
--- a/pkgs/tools/misc/heatseeker/default.nix
+++ b/pkgs/tools/misc/heatseeker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, coreutils }:
+{ lib, fetchFromGitHub, rustPlatform, coreutils }:
 
 rustPlatform.buildRustPackage rec {
   pname = "heatseeker";
diff --git a/pkgs/tools/misc/hexyl/default.nix b/pkgs/tools/misc/hexyl/default.nix
index e75d01057314e..d825368cb970a 100644
--- a/pkgs/tools/misc/hexyl/default.nix
+++ b/pkgs/tools/misc/hexyl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "hexyl";
diff --git a/pkgs/tools/misc/hyperledger-fabric/default.nix b/pkgs/tools/misc/hyperledger-fabric/default.nix
index 13a88dcba3038..9f7fa31d3f2c4 100644
--- a/pkgs/tools/misc/hyperledger-fabric/default.nix
+++ b/pkgs/tools/misc/hyperledger-fabric/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "hyperledger-fabric";
diff --git a/pkgs/tools/misc/i3cat/default.nix b/pkgs/tools/misc/i3cat/default.nix
index d75b878ae6d41..e91b17856ed76 100644
--- a/pkgs/tools/misc/i3cat/default.nix
+++ b/pkgs/tools/misc/i3cat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "i3cat";
diff --git a/pkgs/tools/misc/i3minator/default.nix b/pkgs/tools/misc/i3minator/default.nix
index d58efd7a0d426..6e207ce691666 100644
--- a/pkgs/tools/misc/i3minator/default.nix
+++ b/pkgs/tools/misc/i3minator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "i3minator";
diff --git a/pkgs/tools/misc/ical2org/default.nix b/pkgs/tools/misc/ical2org/default.nix
index 58afffcd70616..78f40974ace4b 100644
--- a/pkgs/tools/misc/ical2org/default.nix
+++ b/pkgs/tools/misc/ical2org/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage}:
+{ lib, fetchFromGitHub, buildGoPackage}:
 
 buildGoPackage rec {
   pname = "ical2org";
diff --git a/pkgs/tools/misc/kargo/default.nix b/pkgs/tools/misc/kargo/default.nix
index 00bf94034273e..8c24848f4b59e 100644
--- a/pkgs/tools/misc/kargo/default.nix
+++ b/pkgs/tools/misc/kargo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python3Packages }:
+{ lib, fetchurl, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/misc/kt/default.nix b/pkgs/tools/misc/kt/default.nix
index 8d70b35584e7d..e4713890ac40f 100644
--- a/pkgs/tools/misc/kt/default.nix
+++ b/pkgs/tools/misc/kt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "kt";
diff --git a/pkgs/tools/misc/lazydocker/default.nix b/pkgs/tools/misc/lazydocker/default.nix
index ea66a04a40df1..ed186772ab787 100644
--- a/pkgs/tools/misc/lazydocker/default.nix
+++ b/pkgs/tools/misc/lazydocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "lazydocker";
diff --git a/pkgs/tools/misc/lice/default.nix b/pkgs/tools/misc/lice/default.nix
index f7a8c68ed0620..3322196d6ed51 100644
--- a/pkgs/tools/misc/lice/default.nix
+++ b/pkgs/tools/misc/lice/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
 
diff --git a/pkgs/tools/misc/lnch/default.nix b/pkgs/tools/misc/lnch/default.nix
index 377ba05eba69c..8f41499ca06b7 100644
--- a/pkgs/tools/misc/lnch/default.nix
+++ b/pkgs/tools/misc/lnch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage }:
+{ lib, fetchFromGitHub, buildGoPackage }:
 
 buildGoPackage rec {
   pname = "lnch";
diff --git a/pkgs/tools/misc/lokalise2-cli/default.nix b/pkgs/tools/misc/lokalise2-cli/default.nix
index 1b2fa9bda86b5..0cbf43a8790ef 100644
--- a/pkgs/tools/misc/lokalise2-cli/default.nix
+++ b/pkgs/tools/misc/lokalise2-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "lokalise2-cli";
diff --git a/pkgs/tools/misc/loop/default.nix b/pkgs/tools/misc/loop/default.nix
index b7bd7678535c1..0c3e206a9f28e 100644
--- a/pkgs/tools/misc/loop/default.nix
+++ b/pkgs/tools/misc/loop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage {
   pname = "loop";
diff --git a/pkgs/tools/misc/lsd/default.nix b/pkgs/tools/misc/lsd/default.nix
index 239c9651b86de..c3c9fab8c1eda 100644
--- a/pkgs/tools/misc/lsd/default.nix
+++ b/pkgs/tools/misc/lsd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , nixosTests
 , fetchFromGitHub
 , rustPlatform
diff --git a/pkgs/tools/misc/me_cleaner/default.nix b/pkgs/tools/misc/me_cleaner/default.nix
index 19f43f2c8c5f9..5335624467dbc 100644
--- a/pkgs/tools/misc/me_cleaner/default.nix
+++ b/pkgs/tools/misc/me_cleaner/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub }:
+{ lib, buildPythonPackage, fetchFromGitHub }:
 
 buildPythonPackage rec {
   pname = "me_cleaner";
diff --git a/pkgs/tools/misc/microplane/default.nix b/pkgs/tools/misc/microplane/default.nix
index a0ac411f98e10..131367cf9f2a3 100644
--- a/pkgs/tools/misc/microplane/default.nix
+++ b/pkgs/tools/misc/microplane/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "microplane";
diff --git a/pkgs/tools/misc/mimeo/default.nix b/pkgs/tools/misc/mimeo/default.nix
index 6c332198fa75e..f2ef73cfd99b1 100644
--- a/pkgs/tools/misc/mimeo/default.nix
+++ b/pkgs/tools/misc/mimeo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, desktop-file-utils, file, python3Packages }:
+{ lib, fetchurl, desktop-file-utils, file, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "mimeo";
diff --git a/pkgs/tools/misc/mmake/default.nix b/pkgs/tools/misc/mmake/default.nix
index 5dcbcb065ecca..564e1989aee80 100644
--- a/pkgs/tools/misc/mmake/default.nix
+++ b/pkgs/tools/misc/mmake/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmake";
diff --git a/pkgs/tools/misc/mongodb-tools/default.nix b/pkgs/tools/misc/mongodb-tools/default.nix
index 0415955e09275..7949a82edc485 100644
--- a/pkgs/tools/misc/mongodb-tools/default.nix
+++ b/pkgs/tools/misc/mongodb-tools/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 , openssl
diff --git a/pkgs/tools/misc/nagstamon/default.nix b/pkgs/tools/misc/nagstamon/default.nix
index 3bd297628b2d1..e9f76dbf22d9f 100644
--- a/pkgs/tools/misc/nagstamon/default.nix
+++ b/pkgs/tools/misc/nagstamon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "nagstamon";
diff --git a/pkgs/tools/misc/noteshrink/default.nix b/pkgs/tools/misc/noteshrink/default.nix
index 2d6f23de46879..67c49c3ad0d5c 100644
--- a/pkgs/tools/misc/noteshrink/default.nix
+++ b/pkgs/tools/misc/noteshrink/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3, imagemagick }:
+{ lib, fetchFromGitHub, python3, imagemagick }:
 
 with python3.pkgs;
 
diff --git a/pkgs/tools/misc/ntfy/default.nix b/pkgs/tools/misc/ntfy/default.nix
index 9f28d99ba0f3f..23d4fd57f620c 100644
--- a/pkgs/tools/misc/ntfy/default.nix
+++ b/pkgs/tools/misc/ntfy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "ntfy";
diff --git a/pkgs/tools/misc/pdd/default.nix b/pkgs/tools/misc/pdd/default.nix
index b339f94deb186..916f15c94c6e4 100644
--- a/pkgs/tools/misc/pdd/default.nix
+++ b/pkgs/tools/misc/pdd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, dateutil }:
+{ lib, fetchFromGitHub, buildPythonApplication, dateutil }:
 
 buildPythonApplication rec {
   pname = "pdd";
diff --git a/pkgs/tools/misc/pdf-parser/default.nix b/pkgs/tools/misc/pdf-parser/default.nix
index ceb8b4d68d995..f4572d0e5bcca 100644
--- a/pkgs/tools/misc/pdf-parser/default.nix
+++ b/pkgs/tools/misc/pdf-parser/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchzip }:
+{ lib, python3Packages, fetchzip }:
 
 python3Packages.buildPythonApplication {
   pname = "pdf-parser";
diff --git a/pkgs/tools/misc/pgcenter/default.nix b/pkgs/tools/misc/pgcenter/default.nix
index 5a59e3030e64a..8afaa61e35b50 100644
--- a/pkgs/tools/misc/pgcenter/default.nix
+++ b/pkgs/tools/misc/pgcenter/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgcenter";
diff --git a/pkgs/tools/misc/pgmetrics/default.nix b/pkgs/tools/misc/pgmetrics/default.nix
index 70429ef811a69..54e7093747bf5 100644
--- a/pkgs/tools/misc/pgmetrics/default.nix
+++ b/pkgs/tools/misc/pgmetrics/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pgmetrics";
diff --git a/pkgs/tools/misc/phraseapp-client/default.nix b/pkgs/tools/misc/phraseapp-client/default.nix
index 27c486f4bea36..12b11cf20d018 100644
--- a/pkgs/tools/misc/phraseapp-client/default.nix
+++ b/pkgs/tools/misc/phraseapp-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "phraseapp-client";
diff --git a/pkgs/tools/misc/pistol/default.nix b/pkgs/tools/misc/pistol/default.nix
index 874bbdbaf7018..6eec45db01193 100644
--- a/pkgs/tools/misc/pistol/default.nix
+++ b/pkgs/tools/misc/pistol/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 , file
diff --git a/pkgs/tools/misc/powerline-go/default.nix b/pkgs/tools/misc/powerline-go/default.nix
index 2b46e25c67e84..f69a5c7d380fc 100644
--- a/pkgs/tools/misc/powerline-go/default.nix
+++ b/pkgs/tools/misc/powerline-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "powerline-go";
diff --git a/pkgs/tools/misc/pubs/default.nix b/pkgs/tools/misc/pubs/default.nix
index 82e7659d15248..be5fd6d499c35 100644
--- a/pkgs/tools/misc/pubs/default.nix
+++ b/pkgs/tools/misc/pubs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, python3Packages }:
+{ lib, fetchFromGitHub, fetchpatch, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "pubs";
diff --git a/pkgs/tools/misc/rargs/default.nix b/pkgs/tools/misc/rargs/default.nix
index 834a62803f670..dc07e3dd4f40e 100644
--- a/pkgs/tools/misc/rargs/default.nix
+++ b/pkgs/tools/misc/rargs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub }:
+{ lib, rustPlatform, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname   = "rargs";
diff --git a/pkgs/tools/misc/rename/default.nix b/pkgs/tools/misc/rename/default.nix
index 63ceca8d93491..a9f42d1139e50 100644
--- a/pkgs/tools/misc/rename/default.nix
+++ b/pkgs/tools/misc/rename/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, perlPackages }:
+{ lib, fetchFromGitHub, perlPackages }:
 
 perlPackages.buildPerlPackage {
   pname = "rename";
diff --git a/pkgs/tools/misc/shelldap/default.nix b/pkgs/tools/misc/shelldap/default.nix
index 41e4207d6c98a..18c5aea3dfd8c 100644
--- a/pkgs/tools/misc/shelldap/default.nix
+++ b/pkgs/tools/misc/shelldap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages }:
+{ lib, fetchurl, perlPackages }:
 perlPackages.buildPerlPackage rec {
   pname = "shelldap";
   version = "1.4.0";
diff --git a/pkgs/tools/misc/swaglyrics/default.nix b/pkgs/tools/misc/swaglyrics/default.nix
index c24b12f953926..4bc5c28b55991 100644
--- a/pkgs/tools/misc/swaglyrics/default.nix
+++ b/pkgs/tools/misc/swaglyrics/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python3, fetchFromGitHub, ncurses }:
+{ lib, python3, fetchFromGitHub, ncurses }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "swaglyrics";
diff --git a/pkgs/tools/misc/systrayhelper/default.nix b/pkgs/tools/misc/systrayhelper/default.nix
index e898ded815469..03d8e58f8b02d 100644
--- a/pkgs/tools/misc/systrayhelper/default.nix
+++ b/pkgs/tools/misc/systrayhelper/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
+{ lib, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "systrayhelper";
diff --git a/pkgs/tools/misc/tagref/default.nix b/pkgs/tools/misc/tagref/default.nix
index 43a91eaca529e..ba63ec290d4cd 100644
--- a/pkgs/tools/misc/tagref/default.nix
+++ b/pkgs/tools/misc/tagref/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 rustPlatform.buildRustPackage rec {
   pname = "tagref";
   version = "1.4.1";
diff --git a/pkgs/tools/misc/tensorman/default.nix b/pkgs/tools/misc/tensorman/default.nix
index 84bfdc55d7fb5..0e724059e99d1 100644
--- a/pkgs/tools/misc/tensorman/default.nix
+++ b/pkgs/tools/misc/tensorman/default.nix
@@ -1,4 +1,4 @@
-{ pkg-config, lib, stdenv, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
+{ pkg-config, lib, rustPlatform, rustc, cargo, docker, openssl, fetchFromGitHub }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tensorman";
diff --git a/pkgs/tools/misc/tewisay/default.nix b/pkgs/tools/misc/tewisay/default.nix
index 0e07f3e53f32d..3434ac110b35a 100644
--- a/pkgs/tools/misc/tewisay/default.nix
+++ b/pkgs/tools/misc/tewisay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, makeWrapper }:
+{ lib, buildGoPackage, fetchFromGitHub, makeWrapper }:
 
 buildGoPackage rec {
   pname = "tewisay-unstable";
diff --git a/pkgs/tools/misc/thefuck/default.nix b/pkgs/tools/misc/thefuck/default.nix
index bf87505ab1358..d26c750a0c76c 100644
--- a/pkgs/tools/misc/thefuck/default.nix
+++ b/pkgs/tools/misc/thefuck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication
+{ lib, fetchFromGitHub, buildPythonApplication
 , colorama, decorator, psutil, pyte, six
 , pytest, pytest-mock
 }:
diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 940ae130c8460..57d320fd79069 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python }:
+{ lib, python }:
 
 with python.pkgs;
 
diff --git a/pkgs/tools/misc/togglesg-download/default.nix b/pkgs/tools/misc/togglesg-download/default.nix
index c4d8b20ffdd67..812ad7900d016 100644
--- a/pkgs/tools/misc/togglesg-download/default.nix
+++ b/pkgs/tools/misc/togglesg-download/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
+{ lib, fetchFromGitHub, pythonPackages, makeWrapper, ffmpeg_3 }:
 
 pythonPackages.buildPythonApplication {
 
diff --git a/pkgs/tools/misc/trash-cli/default.nix b/pkgs/tools/misc/trash-cli/default.nix
index 1da49a153b821..d199fd7fda3da 100644
--- a/pkgs/tools/misc/trash-cli/default.nix
+++ b/pkgs/tools/misc/trash-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "trash-cli";
diff --git a/pkgs/tools/misc/trillian/default.nix b/pkgs/tools/misc/trillian/default.nix
index 07b4d8349787e..8a96248e718a2 100644
--- a/pkgs/tools/misc/trillian/default.nix
+++ b/pkgs/tools/misc/trillian/default.nix
@@ -1,15 +1,11 @@
-{ stdenv
-, lib
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
-let
+
+buildGoModule rec {
   pname = "trillian";
   version = "1.3.11";
-
-in
-buildGoModule {
-  inherit pname version;
   vendorSha256 = "0zxp1gjzcc3z6vkpc2bchbs1shwm1b28ks0jh4gf6zxpp4361j4l";
 
   src = fetchFromGitHub {
@@ -34,10 +30,10 @@ buildGoModule {
     "cmd/updatetree"
   ];
 
-  meta = {
+  meta = with lib; {
     homepage = "https://github.com/google/trillian";
     description = "A transparent, highly scalable and cryptographically verifiable data store.";
-    license = [ lib.licenses.asl20 ];
-    maintainers = [ lib.maintainers.adisbladis ];
+    license = [ licenses.asl20 ];
+    maintainers = [ maintainers.adisbladis ];
   };
 }
diff --git a/pkgs/tools/misc/tydra/default.nix b/pkgs/tools/misc/tydra/default.nix
index 6714ee489f5c3..00c8aa2a2c3bd 100644
--- a/pkgs/tools/misc/tydra/default.nix
+++ b/pkgs/tools/misc/tydra/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, installShellFiles }:
+{ lib, rustPlatform, fetchFromGitHub, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tydra";
diff --git a/pkgs/tools/misc/unicode/default.nix b/pkgs/tools/misc/unicode/default.nix
index c8e1a0f7ca4be..a2bc615ed86fb 100644
--- a/pkgs/tools/misc/unicode/default.nix
+++ b/pkgs/tools/misc/unicode/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
+{ lib, fetchFromGitHub, fetchurl, python3Packages, installShellFiles }:
 
 python3Packages.buildPythonApplication rec {
   pname = "unicode";
diff --git a/pkgs/tools/misc/upower-notify/default.nix b/pkgs/tools/misc/upower-notify/default.nix
index ddc0fa42c6917..79460f3a5b79c 100644
--- a/pkgs/tools/misc/upower-notify/default.nix
+++ b/pkgs/tools/misc/upower-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 # To use upower-notify, the maintainer suggests adding something like this to your configuration.nix:
 #
diff --git a/pkgs/tools/misc/vimwiki-markdown/default.nix b/pkgs/tools/misc/vimwiki-markdown/default.nix
index c1b1fce7abdde..18adf99b9c99c 100644
--- a/pkgs/tools/misc/vimwiki-markdown/default.nix
+++ b/pkgs/tools/misc/vimwiki-markdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchPypi
 , markdown
diff --git a/pkgs/tools/misc/vivid/default.nix b/pkgs/tools/misc/vivid/default.nix
index dad352cc65771..e131d8bd4e736 100644
--- a/pkgs/tools/misc/vivid/default.nix
+++ b/pkgs/tools/misc/vivid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "vivid";
diff --git a/pkgs/tools/misc/void/default.nix b/pkgs/tools/misc/void/default.nix
index e6d36155732eb..18699e5911dca 100644
--- a/pkgs/tools/misc/void/default.nix
+++ b/pkgs/tools/misc/void/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "void";
diff --git a/pkgs/tools/misc/wakatime/default.nix b/pkgs/tools/misc/wakatime/default.nix
index 75f461062093b..e8bd12d567b62 100644
--- a/pkgs/tools/misc/wakatime/default.nix
+++ b/pkgs/tools/misc/wakatime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub, glibcLocales }:
+{ lib, python3Packages, fetchFromGitHub, glibcLocales }:
 
 with python3Packages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/misc/xdxf2slob/default.nix b/pkgs/tools/misc/xdxf2slob/default.nix
index 8d4998a9ff99e..b898aa2fc2426 100644
--- a/pkgs/tools/misc/xdxf2slob/default.nix
+++ b/pkgs/tools/misc/xdxf2slob/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication {
   name = "xdxf2slob-unstable-2015-06-30";
diff --git a/pkgs/tools/misc/xflux/gui.nix b/pkgs/tools/misc/xflux/gui.nix
index 378337f6232bf..16379820653b3 100644
--- a/pkgs/tools/misc/xflux/gui.nix
+++ b/pkgs/tools/misc/xflux/gui.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
+{ lib, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
 , xflux, librsvg, gtk3, gobject-introspection, pango, gdk-pixbuf, atk
 , pexpect, pyGtkGlade, pygobject3, pyxdg, libappindicator-gtk3
 }:
diff --git a/pkgs/tools/misc/xmonad-log/default.nix b/pkgs/tools/misc/xmonad-log/default.nix
index b8dd369cd6a83..acd4a9e1d46de 100644
--- a/pkgs/tools/misc/xmonad-log/default.nix
+++ b/pkgs/tools/misc/xmonad-log/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "xmonad-log";
diff --git a/pkgs/tools/misc/yle-dl/default.nix b/pkgs/tools/misc/yle-dl/default.nix
index 64568ca46b068..9ee81cd1b1589 100644
--- a/pkgs/tools/misc/yle-dl/default.nix
+++ b/pkgs/tools/misc/yle-dl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
+{ lib, fetchFromGitHub, rtmpdump, php, wget, python3Packages, ffmpeg_3 }:
 
 python3Packages.buildPythonApplication rec {
   pname = "yle-dl";
diff --git a/pkgs/tools/misc/you-get/default.nix b/pkgs/tools/misc/you-get/default.nix
index 5444308399657..f58fb349c959f 100644
--- a/pkgs/tools/misc/you-get/default.nix
+++ b/pkgs/tools/misc/you-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi }:
+{ lib, buildPythonApplication, fetchPypi }:
 
 buildPythonApplication rec {
   pname = "you-get";
diff --git a/pkgs/tools/misc/yubikey-neo-manager/default.nix b/pkgs/tools/misc/yubikey-neo-manager/default.nix
index eeb4f5c1bd59d..3991b99fcdcf8 100644
--- a/pkgs/tools/misc/yubikey-neo-manager/default.nix
+++ b/pkgs/tools/misc/yubikey-neo-manager/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python27Packages
+{ lib, fetchurl, python27Packages
 , libykneomgr, yubikey-personalization, libu2f-host }:
 
 python27Packages.buildPythonPackage rec {
diff --git a/pkgs/tools/misc/yubikey-personalization-gui/default.nix b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
index 6934791da8ea1..af6843e382026 100644
--- a/pkgs/tools/misc/yubikey-personalization-gui/default.nix
+++ b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
+{ lib, fetchurl, mkDerivation, pkg-config, qtbase, qmake, imagemagick
 , libyubikey, yubikey-personalization }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/misc/zabbixctl/default.nix b/pkgs/tools/misc/zabbixctl/default.nix
index 15add8ed19196..81d81b6794eb0 100644
--- a/pkgs/tools/misc/zabbixctl/default.nix
+++ b/pkgs/tools/misc/zabbixctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "zabbixctl";
diff --git a/pkgs/tools/networking/assh/default.nix b/pkgs/tools/networking/assh/default.nix
index 13018d183ca4b..3995fc295d104 100644
--- a/pkgs/tools/networking/assh/default.nix
+++ b/pkgs/tools/networking/assh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
+{ lib, buildGoModule, fetchFromGitHub, openssh, makeWrapper }:
 
 buildGoModule rec {
   pname = "assh";
diff --git a/pkgs/tools/networking/brook/default.nix b/pkgs/tools/networking/brook/default.nix
index f84176495aa4b..b6f7cb1869ad5 100644
--- a/pkgs/tools/networking/brook/default.nix
+++ b/pkgs/tools/networking/brook/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "brook";
diff --git a/pkgs/tools/networking/bukubrow/default.nix b/pkgs/tools/networking/bukubrow/default.nix
index 5188954b7634c..157720651f43b 100644
--- a/pkgs/tools/networking/bukubrow/default.nix
+++ b/pkgs/tools/networking/bukubrow/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, sqlite }: let
+{ lib, rustPlatform, fetchFromGitHub, sqlite }: let
 
 manifest = {
   description = "Bukubrow extension host application";
diff --git a/pkgs/tools/networking/circus/default.nix b/pkgs/tools/networking/circus/default.nix
index 891eb19c83520..f24c0e629cb01 100644
--- a/pkgs/tools/networking/circus/default.nix
+++ b/pkgs/tools/networking/circus/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3 }:
+{ lib, python3 }:
 
 let
   python = python3.override {
diff --git a/pkgs/tools/networking/clash/default.nix b/pkgs/tools/networking/clash/default.nix
index 590fcf1dbafe8..543c86db307fd 100644
--- a/pkgs/tools/networking/clash/default.nix
+++ b/pkgs/tools/networking/clash/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "clash";
diff --git a/pkgs/tools/networking/connman/connman-notify/default.nix b/pkgs/tools/networking/connman/connman-notify/default.nix
index 9f0c9873e2a76..cbf500913038c 100644
--- a/pkgs/tools/networking/connman/connman-notify/default.nix
+++ b/pkgs/tools/networking/connman/connman-notify/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
+{ lib, fetchFromGitLab, python3Packages, glib, gobject-introspection, wrapGAppsHook }:
 
 python3Packages.buildPythonApplication {
   pname = "connman-notify";
diff --git a/pkgs/tools/networking/corerad/default.nix b/pkgs/tools/networking/corerad/default.nix
index 64e8e09467d99..a7e5026d83af5 100644
--- a/pkgs/tools/networking/corerad/default.nix
+++ b/pkgs/tools/networking/corerad/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
 
 buildGoModule rec {
   pname = "corerad";
diff --git a/pkgs/tools/networking/croc/default.nix b/pkgs/tools/networking/croc/default.nix
index 92493ab109f43..4a4578a735620 100644
--- a/pkgs/tools/networking/croc/default.nix
+++ b/pkgs/tools/networking/croc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, callPackage}:
+{ lib, buildGoModule, fetchFromGitHub, callPackage}:
 
 buildGoModule rec {
   pname = "croc";
diff --git a/pkgs/tools/networking/curl-unix-socket/default.nix b/pkgs/tools/networking/curl-unix-socket/default.nix
index 84b5c1861cd3a..ab4c3292ea519 100644
--- a/pkgs/tools/networking/curl-unix-socket/default.nix
+++ b/pkgs/tools/networking/curl-unix-socket/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "curl-unix-socket-2015-04-10";
diff --git a/pkgs/tools/networking/dd-agent/datadog-agent.nix b/pkgs/tools/networking/dd-agent/datadog-agent.nix
index d980d57022619..ad37245d57ca8 100644
--- a/pkgs/tools/networking/dd-agent/datadog-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
+{ lib, fetchFromGitHub, buildGoPackage, makeWrapper, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
 
 let
   # keep this in sync with github.com/DataDog/agent-payload dependency
diff --git a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
index a77030bba930e..e2c497dad405a 100644
--- a/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-process-agent.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage  }:
+{ lib, fetchFromGitHub, buildGoPackage  }:
 
 buildGoPackage rec {
   pname = "datadog-process-agent";
diff --git a/pkgs/tools/networking/ddclient/default.nix b/pkgs/tools/networking/ddclient/default.nix
index 3b52c2be25274..51454ac1197cc 100644
--- a/pkgs/tools/networking/ddclient/default.nix
+++ b/pkgs/tools/networking/ddclient/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, iproute, perl }:
+{ lib, fetchurl, perlPackages, iproute, perl }:
 
 perlPackages.buildPerlPackage rec {
   pname = "ddclient";
diff --git a/pkgs/tools/networking/dnscrypt-proxy2/default.nix b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
index 3526562e11c8c..8aedb4032608b 100644
--- a/pkgs/tools/networking/dnscrypt-proxy2/default.nix
+++ b/pkgs/tools/networking/dnscrypt-proxy2/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "dnscrypt-proxy2";
diff --git a/pkgs/tools/networking/dnsproxy/default.nix b/pkgs/tools/networking/dnsproxy/default.nix
index a04244642ba50..718606fdfa68c 100644
--- a/pkgs/tools/networking/dnsproxy/default.nix
+++ b/pkgs/tools/networking/dnsproxy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "dnsproxy";
diff --git a/pkgs/tools/networking/filegive/default.nix b/pkgs/tools/networking/filegive/default.nix
index 3ed250ca4bcd9..1d7bf884edd51 100644
--- a/pkgs/tools/networking/filegive/default.nix
+++ b/pkgs/tools/networking/filegive/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchurl }:
+{ buildGoPackage, lib, fetchurl }:
 
 buildGoPackage rec {
   name = "filegive-0.7.4";
diff --git a/pkgs/tools/networking/getmail/default.nix b/pkgs/tools/networking/getmail/default.nix
index d994d9d8cec95..4e20cbe74410a 100644
--- a/pkgs/tools/networking/getmail/default.nix
+++ b/pkgs/tools/networking/getmail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "getmail";
diff --git a/pkgs/tools/networking/goklp/default.nix b/pkgs/tools/networking/goklp/default.nix
index 78117a700bd35..10c5c8ea64fec 100644
--- a/pkgs/tools/networking/goklp/default.nix
+++ b/pkgs/tools/networking/goklp/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "goklp";
diff --git a/pkgs/tools/networking/goreplay/default.nix b/pkgs/tools/networking/goreplay/default.nix
index 564c45d2e144d..14d0a16366ba4 100644
--- a/pkgs/tools/networking/goreplay/default.nix
+++ b/pkgs/tools/networking/goreplay/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, libpcap }:
+{ lib, buildGoPackage, fetchFromGitHub, libpcap }:
 
 buildGoPackage rec {
   pname = "goreplay";
diff --git a/pkgs/tools/networking/http-prompt/default.nix b/pkgs/tools/networking/http-prompt/default.nix
index 59a3bffdc6db6..3732fbd879f5e 100644
--- a/pkgs/tools/networking/http-prompt/default.nix
+++ b/pkgs/tools/networking/http-prompt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, httpie }:
+{ lib, fetchFromGitHub, python3Packages, httpie }:
 
 python3Packages.buildPythonApplication rec {
   pname = "http-prompt";
diff --git a/pkgs/tools/networking/httpie/default.nix b/pkgs/tools/networking/httpie/default.nix
index 66513819ab892..c5e12317fd7da 100644
--- a/pkgs/tools/networking/httpie/default.nix
+++ b/pkgs/tools/networking/httpie/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
+{ lib, fetchFromGitHub, python3Packages, docutils, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "httpie";
diff --git a/pkgs/tools/networking/httplab/default.nix b/pkgs/tools/networking/httplab/default.nix
index 22dc500fd4cd0..40851d370c79d 100644
--- a/pkgs/tools/networking/httplab/default.nix
+++ b/pkgs/tools/networking/httplab/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "httplab";
diff --git a/pkgs/tools/networking/httpstat/default.nix b/pkgs/tools/networking/httpstat/default.nix
index a8b9630aab212..27c2a145a6592 100644
--- a/pkgs/tools/networking/httpstat/default.nix
+++ b/pkgs/tools/networking/httpstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
+{ lib, fetchFromGitHub, curl, pythonPackages, glibcLocales }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "httpstat";
diff --git a/pkgs/tools/networking/ipgrep/default.nix b/pkgs/tools/networking/ipgrep/default.nix
index dd85a5dcb617b..d1f5316c27b40 100644
--- a/pkgs/tools/networking/ipgrep/default.nix
+++ b/pkgs/tools/networking/ipgrep/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   version = "1.0.1";
diff --git a/pkgs/tools/networking/kail/default.nix b/pkgs/tools/networking/kail/default.nix
index 2ddcd6c7d4bfa..ae431b329eaf3 100644
--- a/pkgs/tools/networking/kail/default.nix
+++ b/pkgs/tools/networking/kail/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "kail";
diff --git a/pkgs/tools/networking/minio-client/default.nix b/pkgs/tools/networking/minio-client/default.nix
index 3145f85186b96..9d667d0ee1dcd 100644
--- a/pkgs/tools/networking/minio-client/default.nix
+++ b/pkgs/tools/networking/minio-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "minio-client";
diff --git a/pkgs/tools/networking/offlineimap/default.nix b/pkgs/tools/networking/offlineimap/default.nix
index 698046358e382..0de96169769a0 100644
--- a/pkgs/tools/networking/offlineimap/default.nix
+++ b/pkgs/tools/networking/offlineimap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages,
+{ lib, fetchFromGitHub, python2Packages,
   asciidoc, cacert, libxml2, libxslt, docbook_xsl }:
 
 python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/networking/persepolis/default.nix b/pkgs/tools/networking/persepolis/default.nix
index 2ebec34b219af..5e4f0542d3642 100644
--- a/pkgs/tools/networking/persepolis/default.nix
+++ b/pkgs/tools/networking/persepolis/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonApplication, fetchFromGitHub, makeWrapper
+{ lib, buildPythonApplication, fetchFromGitHub, makeWrapper
 , aria
 , libnotify
 , pulseaudio
diff --git a/pkgs/tools/networking/photon/default.nix b/pkgs/tools/networking/photon/default.nix
index 55dedc09bea5c..d3f153e44aed3 100644
--- a/pkgs/tools/networking/photon/default.nix
+++ b/pkgs/tools/networking/photon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonApplication rec {
   pname = "photon";
diff --git a/pkgs/tools/networking/pirate-get/default.nix b/pkgs/tools/networking/pirate-get/default.nix
index 76b77da1764b1..dc9133229af78 100644
--- a/pkgs/tools/networking/pirate-get/default.nix
+++ b/pkgs/tools/networking/pirate-get/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/tools/networking/pixiecore/default.nix b/pkgs/tools/networking/pixiecore/default.nix
index ec275c5e6a81e..6155d411e13b1 100644
--- a/pkgs/tools/networking/pixiecore/default.nix
+++ b/pkgs/tools/networking/pixiecore/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pixiecore";
diff --git a/pkgs/tools/networking/polysh/default.nix b/pkgs/tools/networking/polysh/default.nix
index 68cb8fed57a00..69e5d0427e585 100644
--- a/pkgs/tools/networking/polysh/default.nix
+++ b/pkgs/tools/networking/polysh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, python2Packages }:
+{ lib, fetchurl, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication;
diff --git a/pkgs/tools/networking/proxify/default.nix b/pkgs/tools/networking/proxify/default.nix
index 7f45d53d41d14..6a0bfcc6ee222 100644
--- a/pkgs/tools/networking/proxify/default.nix
+++ b/pkgs/tools/networking/proxify/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/networking/pssh/default.nix b/pkgs/tools/networking/pssh/default.nix
index b2b08cea84436..a17701644c87b 100644
--- a/pkgs/tools/networking/pssh/default.nix
+++ b/pkgs/tools/networking/pssh/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages, openssh, rsync }:
+{ lib, fetchFromGitHub, pythonPackages, openssh, rsync }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "pssh";
diff --git a/pkgs/tools/networking/pykms/default.nix b/pkgs/tools/networking/pykms/default.nix
index f856f591bf482..0d001e7aeef19 100644
--- a/pkgs/tools/networking/pykms/default.nix
+++ b/pkgs/tools/networking/pykms/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
+{ lib, runtimeShell, fetchFromGitHub, python3, writeText, writeScript
 , coreutils, sqlite }:
 
 with python3.pkgs;
diff --git a/pkgs/tools/networking/s3cmd/default.nix b/pkgs/tools/networking/s3cmd/default.nix
index 06f51b0c5063d..15f6ff3dfa0cd 100644
--- a/pkgs/tools/networking/s3cmd/default.nix
+++ b/pkgs/tools/networking/s3cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
+{ lib, buildPythonApplication, fetchFromGitHub, python_magic, dateutil }:
 
 buildPythonApplication rec {
   pname = "s3cmd";
diff --git a/pkgs/tools/networking/s3gof3r/default.nix b/pkgs/tools/networking/s3gof3r/default.nix
index 390b35b0297f1..4623b68ad4cf9 100644
--- a/pkgs/tools/networking/s3gof3r/default.nix
+++ b/pkgs/tools/networking/s3gof3r/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "s3gof3r";
diff --git a/pkgs/tools/networking/s4cmd/default.nix b/pkgs/tools/networking/s4cmd/default.nix
index 80874649072aa..95dc02cb5cd49 100644
--- a/pkgs/tools/networking/s4cmd/default.nix
+++ b/pkgs/tools/networking/s4cmd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "s4cmd";
diff --git a/pkgs/tools/networking/shadowfox/default.nix b/pkgs/tools/networking/shadowfox/default.nix
index c7507925f5f84..e6b1c823eb88a 100644
--- a/pkgs/tools/networking/shadowfox/default.nix
+++ b/pkgs/tools/networking/shadowfox/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "shadowfox";
diff --git a/pkgs/tools/networking/subfinder/default.nix b/pkgs/tools/networking/subfinder/default.nix
index 4474cba6aee02..2844cc2dac08d 100644
--- a/pkgs/tools/networking/subfinder/default.nix
+++ b/pkgs/tools/networking/subfinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "subfinder";
diff --git a/pkgs/tools/networking/tdns-cli/default.nix b/pkgs/tools/networking/tdns-cli/default.nix
index 0ed7922874dc9..9d786d60b12e4 100644
--- a/pkgs/tools/networking/tdns-cli/default.nix
+++ b/pkgs/tools/networking/tdns-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   name = "tdns-cli";
diff --git a/pkgs/tools/networking/tendermint/default.nix b/pkgs/tools/networking/tendermint/default.nix
index bd280e75379db..36269327e815d 100644
--- a/pkgs/tools/networking/tendermint/default.nix
+++ b/pkgs/tools/networking/tendermint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule }:
 
 buildGoModule rec {
   pname = "tendermint";
diff --git a/pkgs/tools/networking/termshark/default.nix b/pkgs/tools/networking/termshark/default.nix
index f4e790fea36fd..65ba8d17bcb47 100644
--- a/pkgs/tools/networking/termshark/default.nix
+++ b/pkgs/tools/networking/termshark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
+{ lib, fetchFromGitHub, makeWrapper, buildGoModule, wireshark-cli }:
 
 buildGoModule rec {
   pname = "termshark";
diff --git a/pkgs/tools/networking/tox-node/default.nix b/pkgs/tools/networking/tox-node/default.nix
index 85fcea008de07..3ef125382b68a 100644
--- a/pkgs/tools/networking/tox-node/default.nix
+++ b/pkgs/tools/networking/tox-node/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub
+{ lib, rustPlatform, fetchFromGitHub
 , libsodium, openssl
 , pkg-config
 }:
diff --git a/pkgs/tools/networking/ua/default.nix b/pkgs/tools/networking/ua/default.nix
index 69bc3fc409b7b..feb17b283de56 100644
--- a/pkgs/tools/networking/ua/default.nix
+++ b/pkgs/tools/networking/ua/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchgit
+{ lib, buildGoPackage, fetchgit
 , pkg-config
 , glib, libxml2
 }:
diff --git a/pkgs/tools/networking/urlwatch/default.nix b/pkgs/tools/networking/urlwatch/default.nix
index 10bbc963a28dc..1cea3989ed263 100644
--- a/pkgs/tools/networking/urlwatch/default.nix
+++ b/pkgs/tools/networking/urlwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "urlwatch";
diff --git a/pkgs/tools/networking/waitron/default.nix b/pkgs/tools/networking/waitron/default.nix
index 7efe7018d318c..8364cd5763dc1 100644
--- a/pkgs/tools/networking/waitron/default.nix
+++ b/pkgs/tools/networking/waitron/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.3.0
-{ lib, stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ lib, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
 
 buildGoPackage rec {
   name = "waitron-unstable-${version}";
diff --git a/pkgs/tools/networking/wifite2/default.nix b/pkgs/tools/networking/wifite2/default.nix
index 3b1c3f14ac536..054b77f8c9b8b 100644
--- a/pkgs/tools/networking/wifite2/default.nix
+++ b/pkgs/tools/networking/wifite2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
+{ lib, fetchFromGitHub, fetchpatch, python3, wirelesstools
 , aircrack-ng, wireshark-cli, reaverwps-t6x, cowpatty, hashcat, hcxtools
 , hcxdumptool, pyrit, which }:
 
diff --git a/pkgs/tools/networking/wireguard-go/default.nix b/pkgs/tools/networking/wireguard-go/default.nix
index 100de62683dbe..35c5371113c1a 100644
--- a/pkgs/tools/networking/wireguard-go/default.nix
+++ b/pkgs/tools/networking/wireguard-go/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchzip }:
+{ lib, buildGoPackage, fetchzip }:
 
 buildGoPackage rec {
   pname = "wireguard-go";
diff --git a/pkgs/tools/networking/wormhole-william/default.nix b/pkgs/tools/networking/wormhole-william/default.nix
index 6476d4f43b1e0..48f842f60ced9 100644
--- a/pkgs/tools/networking/wormhole-william/default.nix
+++ b/pkgs/tools/networking/wormhole-william/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "wormhole-william";
diff --git a/pkgs/tools/networking/wstunnel/default.nix b/pkgs/tools/networking/wstunnel/default.nix
index 161b08a7d39e0..a851dcd4ead5a 100644
--- a/pkgs/tools/networking/wstunnel/default.nix
+++ b/pkgs/tools/networking/wstunnel/default.nix
@@ -1,6 +1,6 @@
 { mkDerivation, async, base, base64-bytestring, binary, bytestring
 , classy-prelude, cmdargs, connection, hslogger, mtl, network
-, network-conduit-tls, stdenv, streaming-commons, text
+, network-conduit-tls, streaming-commons, text
 , unordered-containers, websockets
 , hspec, iproute
 , lib, fetchFromGitHub, fetchpatch
diff --git a/pkgs/tools/networking/wuzz/default.nix b/pkgs/tools/networking/wuzz/default.nix
index 73db27f1a9422..156841be33442 100644
--- a/pkgs/tools/networking/wuzz/default.nix
+++ b/pkgs/tools/networking/wuzz/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "wuzz";
diff --git a/pkgs/tools/networking/yrd/default.nix b/pkgs/tools/networking/yrd/default.nix
index 7f946718588b8..75a89b859fe8b 100644
--- a/pkgs/tools/networking/yrd/default.nix
+++ b/pkgs/tools/networking/yrd/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   pname = "yrd";
diff --git a/pkgs/tools/nix/cached-nix-shell/default.nix b/pkgs/tools/nix/cached-nix-shell/default.nix
index b495a3026188c..853bf87346f24 100644
--- a/pkgs/tools/nix/cached-nix-shell/default.nix
+++ b/pkgs/tools/nix/cached-nix-shell/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
+{ lib, fetchFromGitHub, openssl, pkg-config, ronn, rustPlatform }:
 
 let
   blake3-src = fetchFromGitHub {
diff --git a/pkgs/tools/nix/nar-serve/default.nix b/pkgs/tools/nix/nar-serve/default.nix
index 4b0239a2fa234..146165d880ded 100644
--- a/pkgs/tools/nix/nar-serve/default.nix
+++ b/pkgs/tools/nix/nar-serve/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , fetchFromGitHub
 , lib
-, stdenv
+
 }:
 let
   pname = "nar-serve";
diff --git a/pkgs/tools/nix/nix-output-monitor/default.nix b/pkgs/tools/nix/nix-output-monitor/default.nix
index 38e2b060c0c1f..b177b9a233add 100644
--- a/pkgs/tools/nix/nix-output-monitor/default.nix
+++ b/pkgs/tools/nix/nix-output-monitor/default.nix
@@ -1,5 +1,5 @@
 { mkDerivation, ansi-terminal, async, attoparsec, base, containers
-, directory, HUnit, mtl, nix-derivation, process, relude, lib, stdenv
+, directory, HUnit, mtl, nix-derivation, process, relude, lib
 , stm, text, time, unix, fetchFromGitHub
 }:
 mkDerivation {
diff --git a/pkgs/tools/nix/nix-query-tree-viewer/default.nix b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
index f820f36e49f8c..353aafa2a7e46 100644
--- a/pkgs/tools/nix/nix-query-tree-viewer/default.nix
+++ b/pkgs/tools/nix/nix-query-tree-viewer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
+{ lib, fetchFromGitHub, rustPlatform, glib, gtk3, wrapGAppsHook }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-query-tree-viewer";
diff --git a/pkgs/tools/package-management/cargo-kcov/default.nix b/pkgs/tools/package-management/cargo-kcov/default.nix
index 6b825919b60fb..8b2dbe3e48929 100644
--- a/pkgs/tools/package-management/cargo-kcov/default.nix
+++ b/pkgs/tools/package-management/cargo-kcov/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , rustPlatform
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/package-management/gx/default.nix b/pkgs/tools/package-management/gx/default.nix
index 920b23f36abf6..60fbdd4941f79 100644
--- a/pkgs/tools/package-management/gx/default.nix
+++ b/pkgs/tools/package-management/gx/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gx";
diff --git a/pkgs/tools/package-management/gx/go/default.nix b/pkgs/tools/package-management/gx/go/default.nix
index dd14976e63320..ad4435c9e2d3e 100644
--- a/pkgs/tools/package-management/gx/go/default.nix
+++ b/pkgs/tools/package-management/gx/go/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub
+{ lib, buildGoPackage, fetchFromGitHub
 , gx
 }:
 
diff --git a/pkgs/tools/package-management/mynewt-newt/default.nix b/pkgs/tools/package-management/mynewt-newt/default.nix
index 2390c33ca031f..dd5c36019f20f 100644
--- a/pkgs/tools/package-management/mynewt-newt/default.nix
+++ b/pkgs/tools/package-management/mynewt-newt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoModule, fetchFromGitHub, fetchpatch }:
 
 buildGoModule rec {
   pname = "mynewt-newt";
diff --git a/pkgs/tools/package-management/nix-doc/default.nix b/pkgs/tools/package-management/nix-doc/default.nix
index 66691d9f5c5a7..695cd2976d885 100644
--- a/pkgs/tools/package-management/nix-doc/default.nix
+++ b/pkgs/tools/package-management/nix-doc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
+{ lib, rustPlatform, fetchFromGitHub, boost, nix, pkg-config }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-doc";
diff --git a/pkgs/tools/package-management/nix-simple-deploy/default.nix b/pkgs/tools/package-management/nix-simple-deploy/default.nix
index 47734f73fd65b..91f9a39514b60 100644
--- a/pkgs/tools/package-management/nix-simple-deploy/default.nix
+++ b/pkgs/tools/package-management/nix-simple-deploy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform }:
+{ lib, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage rec {
   pname = "nix-simple-deploy";
diff --git a/pkgs/tools/package-management/nixpkgs-review/default.nix b/pkgs/tools/package-management/nixpkgs-review/default.nix
index b1a86f3137e40..d3fcac6277f5f 100644
--- a/pkgs/tools/package-management/nixpkgs-review/default.nix
+++ b/pkgs/tools/package-management/nixpkgs-review/default.nix
@@ -1,9 +1,8 @@
-{ stdenv
+{ lib
 , python3
 , fetchFromGitHub
 , nixFlakes
 , git
-, lib
 }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/tools/package-management/python2nix/default.nix b/pkgs/tools/package-management/python2nix/default.nix
index 3cce599c052ad..b6ffe9abc0243 100644
--- a/pkgs/tools/package-management/python2nix/default.nix
+++ b/pkgs/tools/package-management/python2nix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication {
   name = "python2nix-20140927";
diff --git a/pkgs/tools/security/2fa/default.nix b/pkgs/tools/security/2fa/default.nix
index c8518ef0a9fbe..b06454e736c89 100644
--- a/pkgs/tools/security/2fa/default.nix
+++ b/pkgs/tools/security/2fa/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "1.2.0";
diff --git a/pkgs/tools/security/aws-iam-authenticator/default.nix b/pkgs/tools/security/aws-iam-authenticator/default.nix
index 851eed43adef4..e0499681848bb 100644
--- a/pkgs/tools/security/aws-iam-authenticator/default.nix
+++ b/pkgs/tools/security/aws-iam-authenticator/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "aws-iam-authenticator";
diff --git a/pkgs/tools/security/aws-okta/default.nix b/pkgs/tools/security/aws-okta/default.nix
index 73d95f52b8cf5..08508dd157a09 100644
--- a/pkgs/tools/security/aws-okta/default.nix
+++ b/pkgs/tools/security/aws-okta/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, stdenv, libiconv }:
+{ buildGoPackage, fetchFromGitHub, libusb1, pkg-config, lib, libiconv }:
 
 buildGoPackage rec {
   pname = "aws-okta";
diff --git a/pkgs/tools/security/certmgr/default.nix b/pkgs/tools/security/certmgr/default.nix
index 47848b25b435e..e2318c853f112 100644
--- a/pkgs/tools/security/certmgr/default.nix
+++ b/pkgs/tools/security/certmgr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, fetchpatch }:
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch }:
 
 let
   generic = { patches ? [] }:
diff --git a/pkgs/tools/security/certstrap/default.nix b/pkgs/tools/security/certstrap/default.nix
index f0c756f54f9d4..ff6522f1d35f3 100644
--- a/pkgs/tools/security/certstrap/default.nix
+++ b/pkgs/tools/security/certstrap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "certstrap";
diff --git a/pkgs/tools/security/cfssl/default.nix b/pkgs/tools/security/cfssl/default.nix
index 835c5daa72c57..e92fe7b951f64 100644
--- a/pkgs/tools/security/cfssl/default.nix
+++ b/pkgs/tools/security/cfssl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub, go-rice }:
+{ lib, buildGoModule, fetchFromGitHub, go-rice }:
 
 buildGoModule rec {
   pname = "cfssl";
diff --git a/pkgs/tools/security/chrome-token-signing/default.nix b/pkgs/tools/security/chrome-token-signing/default.nix
index 4966c6412ab68..5c2e6b4de1523 100644
--- a/pkgs/tools/security/chrome-token-signing/default.nix
+++ b/pkgs/tools/security/chrome-token-signing/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, pcsclite, pkg-config, opensc }:
 
 mkDerivation rec {
   pname = "chrome-token-signing";
diff --git a/pkgs/tools/security/cloudbrute/default.nix b/pkgs/tools/security/cloudbrute/default.nix
index 06f0dd413a5fb..84a59ec495f2e 100644
--- a/pkgs/tools/security/cloudbrute/default.nix
+++ b/pkgs/tools/security/cloudbrute/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/creddump/default.nix b/pkgs/tools/security/creddump/default.nix
index 7a936408433a2..e9e5685acf4ab 100644
--- a/pkgs/tools/security/creddump/default.nix
+++ b/pkgs/tools/security/creddump/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, python2, python2Packages }:
+{ lib, fetchFromGitLab, python2, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   pname = "creddump";
diff --git a/pkgs/tools/security/crlfuzz/default.nix b/pkgs/tools/security/crlfuzz/default.nix
index feddd893cece6..88bd45bb5e161 100644
--- a/pkgs/tools/security/crlfuzz/default.nix
+++ b/pkgs/tools/security/crlfuzz/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/crowbar/default.nix b/pkgs/tools/security/crowbar/default.nix
index 2f197421e1f71..e58f77457de28 100644
--- a/pkgs/tools/security/crowbar/default.nix
+++ b/pkgs/tools/security/crowbar/default.nix
@@ -3,7 +3,7 @@
 , nmap
 , openvpn
 , python3Packages
-, lib, stdenv
+, lib
 , tigervnc
 }:
 
diff --git a/pkgs/tools/security/deepsea/default.nix b/pkgs/tools/security/deepsea/default.nix
index 855549bb0c813..e351eb7a79d40 100644
--- a/pkgs/tools/security/deepsea/default.nix
+++ b/pkgs/tools/security/deepsea/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/dnsrecon/default.nix b/pkgs/tools/security/dnsrecon/default.nix
index 65b18c5c8226f..5eda4e75f94b5 100644
--- a/pkgs/tools/security/dnsrecon/default.nix
+++ b/pkgs/tools/security/dnsrecon/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "dnsrecon";
diff --git a/pkgs/tools/security/dnsx/default.nix b/pkgs/tools/security/dnsx/default.nix
index 1a82467201dfa..35f033cb983ff 100644
--- a/pkgs/tools/security/dnsx/default.nix
+++ b/pkgs/tools/security/dnsx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/ffuf/default.nix b/pkgs/tools/security/ffuf/default.nix
index 084601a412228..46995e2844177 100644
--- a/pkgs/tools/security/ffuf/default.nix
+++ b/pkgs/tools/security/ffuf/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/fido2luks/default.nix b/pkgs/tools/security/fido2luks/default.nix
index e0dcdadb7b073..f8c5b4a9f12f2 100644
--- a/pkgs/tools/security/fido2luks/default.nix
+++ b/pkgs/tools/security/fido2luks/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , rustPlatform
 , fetchFromGitHub
 , cryptsetup
diff --git a/pkgs/tools/security/fierce/default.nix b/pkgs/tools/security/fierce/default.nix
index 3d6472cbb44f8..797a2db211b29 100644
--- a/pkgs/tools/security/fierce/default.nix
+++ b/pkgs/tools/security/fierce/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python3 }:
+{ lib, fetchFromGitHub, python3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "fierce";
diff --git a/pkgs/tools/security/gau/default.nix b/pkgs/tools/security/gau/default.nix
index 98045a107e50b..46498e49cffe7 100644
--- a/pkgs/tools/security/gau/default.nix
+++ b/pkgs/tools/security/gau/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/gnome-keysign/default.nix b/pkgs/tools/security/gnome-keysign/default.nix
index db0e88a805ba6..a94be8295ea08 100644
--- a/pkgs/tools/security/gnome-keysign/default.nix
+++ b/pkgs/tools/security/gnome-keysign/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitLab
 , fetchpatch
 , python3
diff --git a/pkgs/tools/security/gospider/default.nix b/pkgs/tools/security/gospider/default.nix
index f32ecdc94e65f..f4b750d394a01 100644
--- a/pkgs/tools/security/gospider/default.nix
+++ b/pkgs/tools/security/gospider/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/grype/default.nix b/pkgs/tools/security/grype/default.nix
index 495302139855a..ac896c4d55bec 100644
--- a/pkgs/tools/security/grype/default.nix
+++ b/pkgs/tools/security/grype/default.nix
@@ -1,7 +1,7 @@
 { buildGoModule
 , docker
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/hologram/default.nix b/pkgs/tools/security/hologram/default.nix
index 6ec4d7776e1fe..9c1c896d889d1 100644
--- a/pkgs/tools/security/hologram/default.nix
+++ b/pkgs/tools/security/hologram/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "hologram-2018-03-19";
diff --git a/pkgs/tools/security/httpx/default.nix b/pkgs/tools/security/httpx/default.nix
index 7135baab37598..bff9e03bc6f4e 100644
--- a/pkgs/tools/security/httpx/default.nix
+++ b/pkgs/tools/security/httpx/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/keybase/kbfs.nix b/pkgs/tools/security/keybase/kbfs.nix
index 6916d6b99bd8d..67abb57394cdb 100644
--- a/pkgs/tools/security/keybase/kbfs.nix
+++ b/pkgs/tools/security/keybase/kbfs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, keybase }:
+{ lib, buildGoPackage, fetchFromGitHub, keybase }:
 
 buildGoPackage {
   pname = "kbfs";
diff --git a/pkgs/tools/security/knockknock/default.nix b/pkgs/tools/security/knockknock/default.nix
index 7a00f183f15da..960667e72def0 100644
--- a/pkgs/tools/security/knockknock/default.nix
+++ b/pkgs/tools/security/knockknock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages, hping }:
+{ lib, fetchFromGitHub, python2Packages, hping }:
 let
   rev  = "bf14bbff";
 in python2Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/security/lesspass-cli/default.nix b/pkgs/tools/security/lesspass-cli/default.nix
index 20473d1003e4f..ce64b6847fe2a 100644
--- a/pkgs/tools/security/lesspass-cli/default.nix
+++ b/pkgs/tools/security/lesspass-cli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, fetchFromGitHub }:
+{ lib, python3, fetchFromGitHub }:
 
 let
   inherit (python3.pkgs) buildPythonApplication pytest mock pexpect;
diff --git a/pkgs/tools/security/notary/default.nix b/pkgs/tools/security/notary/default.nix
index fa3db0c3623c6..ab6ec0b16818f 100644
--- a/pkgs/tools/security/notary/default.nix
+++ b/pkgs/tools/security/notary/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, libtool }:
+{ lib, fetchFromGitHub, buildGoPackage, libtool }:
 
 buildGoPackage rec {
   pname = "notary";
diff --git a/pkgs/tools/security/nuclei/default.nix b/pkgs/tools/security/nuclei/default.nix
index 7e9d3d52e56b1..2df24e63d8947 100644
--- a/pkgs/tools/security/nuclei/default.nix
+++ b/pkgs/tools/security/nuclei/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/onioncircuits/default.nix b/pkgs/tools/security/onioncircuits/default.nix
index bdaf087004a1a..8c5083ee8af66 100644
--- a/pkgs/tools/security/onioncircuits/default.nix
+++ b/pkgs/tools/security/onioncircuits/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
+{ lib, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "onioncircuits";
diff --git a/pkgs/tools/security/pius/default.nix b/pkgs/tools/security/pius/default.nix
index 7d038a1aeabb2..3612caa196c2f 100644
--- a/pkgs/tools/security/pius/default.nix
+++ b/pkgs/tools/security/pius/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, lib, stdenv, python3Packages, gnupg, perl }:
+{ fetchFromGitHub, lib, python3Packages, gnupg, perl }:
 
 let version = "3.0.0"; in
 python3Packages.buildPythonApplication {
diff --git a/pkgs/tools/security/pyrit/default.nix b/pkgs/tools/security/pyrit/default.nix
index ead55036425fc..dc1d0b97f8791 100644
--- a/pkgs/tools/security/pyrit/default.nix
+++ b/pkgs/tools/security/pyrit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
+{ lib, fetchFromGitHub, python2Packages, openssl, zlib, libpcap, opencl-headers, ocl-icd }:
 
 let
   version = "2019-12-13";
diff --git a/pkgs/tools/security/qdigidoc/default.nix b/pkgs/tools/security/qdigidoc/default.nix
index 2b769ee0a15c8..8ba6937c44862 100644
--- a/pkgs/tools/security/qdigidoc/default.nix
+++ b/pkgs/tools/security/qdigidoc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
+{ lib, mkDerivation, fetchgit, fetchurl, cmake, darkhttpd, gettext, makeWrapper, pkg-config
 , libdigidocpp, opensc, openldap, openssl, pcsclite, qtbase, qttranslations, qtsvg }:
 
 mkDerivation rec {
diff --git a/pkgs/tools/security/safe/default.nix b/pkgs/tools/security/safe/default.nix
index 2f0f4501fd2f4..503cfbd9e8680 100644
--- a/pkgs/tools/security/safe/default.nix
+++ b/pkgs/tools/security/safe/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoPackage
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/security/saml2aws/default.nix b/pkgs/tools/security/saml2aws/default.nix
index ade299ec5893f..57a92ef4b9968 100644
--- a/pkgs/tools/security/saml2aws/default.nix
+++ b/pkgs/tools/security/saml2aws/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "saml2aws";
diff --git a/pkgs/tools/security/sops/default.nix b/pkgs/tools/security/sops/default.nix
index 9eddc308a4ff9..ae6f000fe3f74 100644
--- a/pkgs/tools/security/sops/default.nix
+++ b/pkgs/tools/security/sops/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "sops";
diff --git a/pkgs/tools/security/subjs/default.nix b/pkgs/tools/security/subjs/default.nix
index 5b9a237d49cb2..1b7986c0a77a2 100644
--- a/pkgs/tools/security/subjs/default.nix
+++ b/pkgs/tools/security/subjs/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/sudolikeaboss/default.nix b/pkgs/tools/security/sudolikeaboss/default.nix
index bdaf8f129d02a..53f99636b4587 100644
--- a/pkgs/tools/security/sudolikeaboss/default.nix
+++ b/pkgs/tools/security/sudolikeaboss/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix, then modified by hand for Darwin support.
-{ lib, stdenv, buildGoPackage, fetchFromGitHub, darwin }:
+{ lib, buildGoPackage, fetchFromGitHub, darwin }:
 
 buildGoPackage rec {
   pname = "sudolikeaboss-unstable";
diff --git a/pkgs/tools/security/teler/default.nix b/pkgs/tools/security/teler/default.nix
index 1acb9e5609ebf..4a971243ad1bc 100644
--- a/pkgs/tools/security/teler/default.nix
+++ b/pkgs/tools/security/teler/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/urlhunter/default.nix b/pkgs/tools/security/urlhunter/default.nix
index 3364b622ad63b..ebc628e563c65 100644
--- a/pkgs/tools/security/urlhunter/default.nix
+++ b/pkgs/tools/security/urlhunter/default.nix
@@ -1,6 +1,6 @@
 { buildGoModule
 , fetchFromGitHub
-, lib, stdenv
+, lib
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/security/vault/default.nix b/pkgs/tools/security/vault/default.nix
index 3af00b9a22b3b..4d9893e103f90 100644
--- a/pkgs/tools/security/vault/default.nix
+++ b/pkgs/tools/security/vault/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
+{ lib, fetchFromGitHub, buildGoPackage, installShellFiles, nixosTests }:
 
 buildGoPackage rec {
   pname = "vault";
diff --git a/pkgs/tools/security/volatility/default.nix b/pkgs/tools/security/volatility/default.nix
index 80cd0d971a3f4..6cc5ddbfb4cfa 100644
--- a/pkgs/tools/security/volatility/default.nix
+++ b/pkgs/tools/security/volatility/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "volatility";
diff --git a/pkgs/tools/security/vulnix/default.nix b/pkgs/tools/security/vulnix/default.nix
index e95adf3e1e6c2..a7ce0fb4b6e49 100644
--- a/pkgs/tools/security/vulnix/default.nix
+++ b/pkgs/tools/security/vulnix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , python3Packages
 , nix
 , ronn
diff --git a/pkgs/tools/system/auto-cpufreq/default.nix b/pkgs/tools/system/auto-cpufreq/default.nix
index 5a94cff19e16c..b4bef5fc5e397 100644
--- a/pkgs/tools/system/auto-cpufreq/default.nix
+++ b/pkgs/tools/system/auto-cpufreq/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, fetchFromGitHub }:
+{ lib, python3Packages, fetchFromGitHub }:
 
 python3Packages.buildPythonPackage rec {
   pname = "auto-cpufreq";
diff --git a/pkgs/tools/system/awstats/default.nix b/pkgs/tools/system/awstats/default.nix
index b04532d842ff8..88162780cb70e 100644
--- a/pkgs/tools/system/awstats/default.nix
+++ b/pkgs/tools/system/awstats/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, perlPackages, jdk }:
+{ lib, fetchurl, perlPackages, jdk }:
 
 perlPackages.buildPerlPackage rec {
   pname = "awstats";
diff --git a/pkgs/tools/system/cm-rgb/default.nix b/pkgs/tools/system/cm-rgb/default.nix
index 9c75fe78c9964..47fdba50c5e8a 100644
--- a/pkgs/tools/system/cm-rgb/default.nix
+++ b/pkgs/tools/system/cm-rgb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildPythonApplication
 , fetchFromGitHub
 , atk
diff --git a/pkgs/tools/system/consul-template/default.nix b/pkgs/tools/system/consul-template/default.nix
index 7604584e16754..a285c720eaaaa 100644
--- a/pkgs/tools/system/consul-template/default.nix
+++ b/pkgs/tools/system/consul-template/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "consul-template";
diff --git a/pkgs/tools/system/envconsul/default.nix b/pkgs/tools/system/envconsul/default.nix
index 1706b32449eb9..9e8180b318a66 100644
--- a/pkgs/tools/system/envconsul/default.nix
+++ b/pkgs/tools/system/envconsul/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "envconsul";
diff --git a/pkgs/tools/system/gdu/default.nix b/pkgs/tools/system/gdu/default.nix
index 53e69cd8cd6a7..0ade0443dc0ec 100644
--- a/pkgs/tools/system/gdu/default.nix
+++ b/pkgs/tools/system/gdu/default.nix
@@ -1,5 +1,5 @@
 { lib
-, stdenv
+
 , buildGoModule
 , fetchFromGitHub
 , installShellFiles
diff --git a/pkgs/tools/system/gotop/default.nix b/pkgs/tools/system/gotop/default.nix
index b49307f500f63..3acace9eaae3f 100644
--- a/pkgs/tools/system/gotop/default.nix
+++ b/pkgs/tools/system/gotop/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "gotop";
diff --git a/pkgs/tools/system/honcho/default.nix b/pkgs/tools/system/honcho/default.nix
index f39c7dd793c47..b653f24072445 100644
--- a/pkgs/tools/system/honcho/default.nix
+++ b/pkgs/tools/system/honcho/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 let
   inherit (pythonPackages) python;
diff --git a/pkgs/tools/system/journalwatch/default.nix b/pkgs/tools/system/journalwatch/default.nix
index 0ec7ef36623e9..3d85d13149c3c 100644
--- a/pkgs/tools/system/journalwatch/default.nix
+++ b/pkgs/tools/system/journalwatch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
 
 buildPythonPackage rec {
   pname = "journalwatch";
diff --git a/pkgs/tools/system/localtime/default.nix b/pkgs/tools/system/localtime/default.nix
index 99e0674016b61..798e3b3e8831f 100644
--- a/pkgs/tools/system/localtime/default.nix
+++ b/pkgs/tools/system/localtime/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, buildGoPackage, m4 }:
+{ lib, fetchFromGitHub, buildGoPackage, m4 }:
 
 buildGoPackage rec {
   name = "localtime-2017-11-07";
diff --git a/pkgs/tools/system/pcstat/default.nix b/pkgs/tools/system/pcstat/default.nix
index 9e0f6fe147e64..d01b08a14343e 100644
--- a/pkgs/tools/system/pcstat/default.nix
+++ b/pkgs/tools/system/pcstat/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "pcstat-unstable";
diff --git a/pkgs/tools/system/ps_mem/default.nix b/pkgs/tools/system/ps_mem/default.nix
index dcca1a86da74c..152bb1150e597 100644
--- a/pkgs/tools/system/ps_mem/default.nix
+++ b/pkgs/tools/system/ps_mem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pythonPackages, fetchFromGitHub }:
+{ lib, pythonPackages, fetchFromGitHub }:
 
 let
   version = "3.13";
diff --git a/pkgs/tools/system/s-tui/default.nix b/pkgs/tools/system/s-tui/default.nix
index 51c47ab105070..3943a8f4eef86 100644
--- a/pkgs/tools/system/s-tui/default.nix
+++ b/pkgs/tools/system/s-tui/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonPackage rec {
   pname = "s-tui";
diff --git a/pkgs/tools/system/s6-rc/default.nix b/pkgs/tools/system/s6-rc/default.nix
index 30467926f5dfc..20c23e1505196 100644
--- a/pkgs/tools/system/s6-rc/default.nix
+++ b/pkgs/tools/system/s6-rc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, skawarePackages }:
+{ lib, skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/tools/system/systemd-journal2gelf/default.nix b/pkgs/tools/system/systemd-journal2gelf/default.nix
index 7ac5d7cf210f8..62a7c9d8aeae5 100644
--- a/pkgs/tools/system/systemd-journal2gelf/default.nix
+++ b/pkgs/tools/system/systemd-journal2gelf/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "SystemdJournal2Gelf-unstable";
diff --git a/pkgs/tools/system/tre-command/default.nix b/pkgs/tools/system/tre-command/default.nix
index 5a2ad41c74471..638caa3c62bc7 100644
--- a/pkgs/tools/system/tre-command/default.nix
+++ b/pkgs/tools/system/tre-command/default.nix
@@ -1,4 +1,4 @@
-{ rustPlatform, fetchFromGitHub, lib, stdenv, installShellFiles }:
+{ rustPlatform, fetchFromGitHub, lib, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "tre-command";
diff --git a/pkgs/tools/text/angle-grinder/default.nix b/pkgs/tools/text/angle-grinder/default.nix
index 82ca3ff0f603c..66441d7371326 100644
--- a/pkgs/tools/text/angle-grinder/default.nix
+++ b/pkgs/tools/text/angle-grinder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/choose/default.nix b/pkgs/tools/text/choose/default.nix
index 20d651df008e9..7816f79649c37 100644
--- a/pkgs/tools/text/choose/default.nix
+++ b/pkgs/tools/text/choose/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , fetchFromGitHub
 , rustPlatform
 }:
diff --git a/pkgs/tools/text/codesearch/default.nix b/pkgs/tools/text/codesearch/default.nix
index bdb273de372bc..9c3e9fbd84098 100644
--- a/pkgs/tools/text/codesearch/default.nix
+++ b/pkgs/tools/text/codesearch/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by go2nix.
-{ lib, stdenv, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   pname = "codesearch";
diff --git a/pkgs/tools/text/fanficfare/default.nix b/pkgs/tools/text/fanficfare/default.nix
index ad92ffa9350b8..e1db7d3d39c03 100644
--- a/pkgs/tools/text/fanficfare/default.nix
+++ b/pkgs/tools/text/fanficfare/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages }:
+{ lib, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "FanFicFare";
diff --git a/pkgs/tools/text/gjo/default.nix b/pkgs/tools/text/gjo/default.nix
index 27dcf633fe7a9..0ab9a54c47b74 100644
--- a/pkgs/tools/text/gjo/default.nix
+++ b/pkgs/tools/text/gjo/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib
 , buildGoModule
 , fetchFromGitHub
 }:
diff --git a/pkgs/tools/text/grin/default.nix b/pkgs/tools/text/grin/default.nix
index dd3568ef0bbef..5d89619001b42 100644
--- a/pkgs/tools/text/grin/default.nix
+++ b/pkgs/tools/text/grin/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, python2Packages }:
+{ lib, fetchFromGitHub, python2Packages }:
 
 python2Packages.buildPythonApplication rec {
   program = "grin";
diff --git a/pkgs/tools/text/gucci/default.nix b/pkgs/tools/text/gucci/default.nix
index 4e938787ff466..943b86d3b051b 100644
--- a/pkgs/tools/text/gucci/default.nix
+++ b/pkgs/tools/text/gucci/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "gucci";
diff --git a/pkgs/tools/text/icdiff/default.nix b/pkgs/tools/text/icdiff/default.nix
index 07082c4c56f36..3ead56298cf61 100644
--- a/pkgs/tools/text/icdiff/default.nix
+++ b/pkgs/tools/text/icdiff/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "icdiff";
diff --git a/pkgs/tools/text/invoice2data/default.nix b/pkgs/tools/text/invoice2data/default.nix
index 87f3f3daff3b7..8007724f4a536 100644
--- a/pkgs/tools/text/invoice2data/default.nix
+++ b/pkgs/tools/text/invoice2data/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3Packages, xpdf, imagemagick, tesseract }:
+{ lib, python3Packages, xpdf, imagemagick, tesseract }:
 
 python3Packages.buildPythonPackage rec {
   pname = "invoice2data";
diff --git a/pkgs/tools/text/markdown-pp/default.nix b/pkgs/tools/text/markdown-pp/default.nix
index 55febe1172983..50ef560f6c3f7 100644
--- a/pkgs/tools/text/markdown-pp/default.nix
+++ b/pkgs/tools/text/markdown-pp/default.nix
@@ -1,4 +1,4 @@
-{ fetchFromGitHub, pythonPackages, lib, stdenv }:
+{ fetchFromGitHub, pythonPackages, lib }:
 
 with pythonPackages;
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/pbgopy/default.nix b/pkgs/tools/text/pbgopy/default.nix
index 5e1473f8a3c9a..d4ed4eb0f03a0 100644
--- a/pkgs/tools/text/pbgopy/default.nix
+++ b/pkgs/tools/text/pbgopy/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "pbgopy";
diff --git a/pkgs/tools/text/platinum-searcher/default.nix b/pkgs/tools/text/platinum-searcher/default.nix
index 30e7e58345d60..ca89b7dc2d8ab 100644
--- a/pkgs/tools/text/platinum-searcher/default.nix
+++ b/pkgs/tools/text/platinum-searcher/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "the_platinum_searcher";
diff --git a/pkgs/tools/text/proselint/default.nix b/pkgs/tools/text/proselint/default.nix
index ea72468dc6935..143c43f660d1b 100644
--- a/pkgs/tools/text/proselint/default.nix
+++ b/pkgs/tools/text/proselint/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, buildPythonApplication, click, future, six }:
+{ lib, fetchurl, buildPythonApplication, click, future, six }:
 
 buildPythonApplication rec {
   pname = "proselint";
diff --git a/pkgs/tools/text/rpl/default.nix b/pkgs/tools/text/rpl/default.nix
index f53a1d790806b..97a30211621c1 100644
--- a/pkgs/tools/text/rpl/default.nix
+++ b/pkgs/tools/text/rpl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "rpl";
diff --git a/pkgs/tools/text/schema2ldif/default.nix b/pkgs/tools/text/schema2ldif/default.nix
index 409bbc16a93f1..84196ae111979 100644
--- a/pkgs/tools/text/schema2ldif/default.nix
+++ b/pkgs/tools/text/schema2ldif/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, makeWrapper, perlPackages }: stdenv.mkDerivation rec {
+{ lib, stdenv, fetchurl, makeWrapper, perlPackages }:
+
+stdenv.mkDerivation rec {
   pname = "schema2ldif";
   version = "1.3";
 
diff --git a/pkgs/tools/text/transifex-client/default.nix b/pkgs/tools/text/transifex-client/default.nix
index 411c9cb989985..a0f3ad1c5e37f 100644
--- a/pkgs/tools/text/transifex-client/default.nix
+++ b/pkgs/tools/text/transifex-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, fetchPypi
+{ lib, buildPythonApplication, fetchPypi
 , python-slugify, requests, urllib3, six, setuptools }:
 
 buildPythonApplication rec {
diff --git a/pkgs/tools/text/xurls/default.nix b/pkgs/tools/text/xurls/default.nix
index b1fd02ca75bbc..fa5418b45818a 100644
--- a/pkgs/tools/text/xurls/default.nix
+++ b/pkgs/tools/text/xurls/default.nix
@@ -1,4 +1,4 @@
-{ buildGoPackage, lib, stdenv, fetchFromGitHub }:
+{ buildGoPackage, lib, fetchFromGitHub }:
 
 buildGoPackage rec {
   version = "2.2.0";
diff --git a/pkgs/tools/typesetting/mmark/default.nix b/pkgs/tools/typesetting/mmark/default.nix
index 70f7e8f53ca80..bc5ddcc9d751f 100644
--- a/pkgs/tools/typesetting/mmark/default.nix
+++ b/pkgs/tools/typesetting/mmark/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "mmark";
diff --git a/pkgs/tools/typesetting/odpdown/default.nix b/pkgs/tools/typesetting/odpdown/default.nix
index 989f61f4592eb..7b20d230b9f74 100644
--- a/pkgs/tools/typesetting/odpdown/default.nix
+++ b/pkgs/tools/typesetting/odpdown/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages, libreoffice }:
+{ lib, fetchurl, pythonPackages, libreoffice }:
 
 pythonPackages.buildPythonApplication rec {
 
diff --git a/pkgs/tools/typesetting/tikzit/default.nix b/pkgs/tools/typesetting/tikzit/default.nix
index 29fd21ed31fe8..2f6d169d0cb52 100644
--- a/pkgs/tools/typesetting/tikzit/default.nix
+++ b/pkgs/tools/typesetting/tikzit/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qttools, qtbase, poppler, flex, bison }:
 
 mkDerivation {
   pname = "tikzit";
diff --git a/pkgs/tools/video/vnc2flv/default.nix b/pkgs/tools/video/vnc2flv/default.nix
index ba28ef08c8f98..88ec2f22b89b8 100644
--- a/pkgs/tools/video/vnc2flv/default.nix
+++ b/pkgs/tools/video/vnc2flv/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pythonPackages }:
+{ lib, fetchurl, pythonPackages }:
 
 pythonPackages.buildPythonApplication rec {
   pname = "vnc2flv";
diff --git a/pkgs/tools/virtualization/awless/default.nix b/pkgs/tools/virtualization/awless/default.nix
index 3faf90ab4ac63..061dd486e0d81 100644
--- a/pkgs/tools/virtualization/awless/default.nix
+++ b/pkgs/tools/virtualization/awless/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "awless";
diff --git a/pkgs/tools/virtualization/awsebcli/default.nix b/pkgs/tools/virtualization/awsebcli/default.nix
index fa8e96def24a1..796ea36eacfd5 100644
--- a/pkgs/tools/virtualization/awsebcli/default.nix
+++ b/pkgs/tools/virtualization/awsebcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, python3, glibcLocales }:
+{ lib, python3, glibcLocales }:
 let
 
   localPython = python3.override {
diff --git a/pkgs/tools/virtualization/distrobuilder/default.nix b/pkgs/tools/virtualization/distrobuilder/default.nix
index a7de9ae8b5951..d06a2b4a17ef1 100644
--- a/pkgs/tools/virtualization/distrobuilder/default.nix
+++ b/pkgs/tools/virtualization/distrobuilder/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkg-config, buildGoPackage, fetchFromGitHub
+{ lib, pkg-config, buildGoPackage, fetchFromGitHub
 , makeWrapper, coreutils, gnupg, gnutar, squashfsTools, debootstrap
 }:
 
diff --git a/pkgs/tools/virtualization/euca2ools/default.nix b/pkgs/tools/virtualization/euca2ools/default.nix
index 371a867d4ddb5..88e83f42733e5 100644
--- a/pkgs/tools/virtualization/euca2ools/default.nix
+++ b/pkgs/tools/virtualization/euca2ools/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, python2Packages }:
+{ lib, fetchgit, python2Packages }:
 
 let
   inherit (python2Packages) buildPythonApplication boto m2crypto;
diff --git a/pkgs/tools/virtualization/marathonctl/default.nix b/pkgs/tools/virtualization/marathonctl/default.nix
index 6f036795e7201..fe31c64952a52 100644
--- a/pkgs/tools/virtualization/marathonctl/default.nix
+++ b/pkgs/tools/virtualization/marathonctl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage {
   pname = "marathonctl-unstable";
diff --git a/pkgs/tools/virtualization/udocker/default.nix b/pkgs/tools/virtualization/udocker/default.nix
index c971dfcb1bd0c..fb067de821250 100644
--- a/pkgs/tools/virtualization/udocker/default.nix
+++ b/pkgs/tools/virtualization/udocker/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
+{ lib, fetchFromGitHub, proot, patchelf, fakechroot, runc, simplejson, pycurl, coreutils, nose, mock, buildPythonApplication }:
 
 buildPythonApplication rec {
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e0d24da0ca8bc..8b86a0631a06f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19276,7 +19276,7 @@ in
       kernel = (if kernel' == pkgs.linux_latest then linux_latest_for_hardened else kernel').override overrides;
     in linuxPackagesFor (kernel.override {
       structuredExtraConfig = import ../os-specific/linux/kernel/hardened/config.nix {
-        inherit lib stdenv;
+        inherit lib;
         inherit (kernel) version;
       };
       kernelPatches = kernel.kernelPatches ++ [