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authorPavol Rusnak <pavol@rusnak.io>2021-01-25 09:26:54 +0100
committerPavol Rusnak <pavol@rusnak.io>2021-01-25 18:31:47 +0100
commita6ce00c50c36624fec06b2b756a766d4d0f4a888 (patch)
tree8d032f7254e836548750154e99dd5f579dc2a2d3 /pkgs/development/python-modules
parente06e84759533c03b308b8b706da33908b4ef1cb9 (diff)
treewide: remove stdenv where not needed
Diffstat (limited to 'pkgs/development/python-modules')
-rw-r--r--pkgs/development/python-modules/FormEncode/default.nix2
-rw-r--r--pkgs/development/python-modules/HTSeq/default.nix2
-rw-r--r--pkgs/development/python-modules/IPy/default.nix2
-rw-r--r--pkgs/development/python-modules/PyLD/default.nix2
-rw-r--r--pkgs/development/python-modules/ROPGadget/default.nix2
-rw-r--r--pkgs/development/python-modules/Wand/default.nix2
-rw-r--r--pkgs/development/python-modules/WazeRouteCalculator/default.nix2
-rw-r--r--pkgs/development/python-modules/aadict/default.nix2
-rw-r--r--pkgs/development/python-modules/aafigure/default.nix2
-rw-r--r--pkgs/development/python-modules/acebinf/default.nix2
-rw-r--r--pkgs/development/python-modules/acme-tiny/default.nix2
-rw-r--r--pkgs/development/python-modules/actdiag/default.nix2
-rw-r--r--pkgs/development/python-modules/adal/default.nix2
-rw-r--r--pkgs/development/python-modules/aenum/default.nix2
-rw-r--r--pkgs/development/python-modules/agate-dbf/default.nix2
-rw-r--r--pkgs/development/python-modules/agate-sql/default.nix2
-rw-r--r--pkgs/development/python-modules/aiobotocore/default.nix2
-rw-r--r--pkgs/development/python-modules/aiodns/default.nix2
-rw-r--r--pkgs/development/python-modules/aioeventlet/default.nix2
-rw-r--r--pkgs/development/python-modules/aioitertools/default.nix2
-rw-r--r--pkgs/development/python-modules/aioredis/default.nix2
-rw-r--r--pkgs/development/python-modules/aiozeroconf/default.nix2
-rw-r--r--pkgs/development/python-modules/ajpy/default.nix2
-rw-r--r--pkgs/development/python-modules/alabaster/default.nix2
-rw-r--r--pkgs/development/python-modules/alarmdecoder/default.nix2
-rw-r--r--pkgs/development/python-modules/alembic/default.nix2
-rw-r--r--pkgs/development/python-modules/alerta-server/default.nix2
-rw-r--r--pkgs/development/python-modules/alerta/default.nix2
-rw-r--r--pkgs/development/python-modules/alot/default.nix2
-rw-r--r--pkgs/development/python-modules/altair/default.nix2
-rw-r--r--pkgs/development/python-modules/amazon_kclpy/default.nix2
-rw-r--r--pkgs/development/python-modules/amply/default.nix2
-rw-r--r--pkgs/development/python-modules/amqp/default.nix2
-rw-r--r--pkgs/development/python-modules/amqplib/default.nix2
-rw-r--r--pkgs/development/python-modules/aniso8601/default.nix2
-rw-r--r--pkgs/development/python-modules/annoy/default.nix2
-rw-r--r--pkgs/development/python-modules/anonip/default.nix2
-rw-r--r--pkgs/development/python-modules/ansicolor/default.nix2
-rw-r--r--pkgs/development/python-modules/ansicolors/default.nix2
-rw-r--r--pkgs/development/python-modules/ansiconv/default.nix2
-rw-r--r--pkgs/development/python-modules/apipkg/default.nix2
-rw-r--r--pkgs/development/python-modules/approvaltests/default.nix2
-rw-r--r--pkgs/development/python-modules/apsw/default.nix2
-rw-r--r--pkgs/development/python-modules/argh/default.nix2
-rw-r--r--pkgs/development/python-modules/args/default.nix2
-rw-r--r--pkgs/development/python-modules/aria2p/default.nix2
-rw-r--r--pkgs/development/python-modules/arrow/default.nix2
-rw-r--r--pkgs/development/python-modules/asana/default.nix2
-rw-r--r--pkgs/development/python-modules/asn1ate/default.nix2
-rw-r--r--pkgs/development/python-modules/astral/default.nix2
-rw-r--r--pkgs/development/python-modules/astunparse/default.nix2
-rw-r--r--pkgs/development/python-modules/asyncssh/default.nix2
-rw-r--r--pkgs/development/python-modules/atomiclong/default.nix2
-rw-r--r--pkgs/development/python-modules/atomicwrites/default.nix2
-rw-r--r--pkgs/development/python-modules/atomman/default.nix2
-rw-r--r--pkgs/development/python-modules/atsim_potentials/default.nix2
-rw-r--r--pkgs/development/python-modules/attrdict/default.nix2
-rw-r--r--pkgs/development/python-modules/authlib/default.nix2
-rw-r--r--pkgs/development/python-modules/authres/default.nix2
-rw-r--r--pkgs/development/python-modules/autograd/default.nix2
-rw-r--r--pkgs/development/python-modules/autologging/default.nix2
-rw-r--r--pkgs/development/python-modules/automat/default.nix2
-rw-r--r--pkgs/development/python-modules/autopep8/default.nix2
-rw-r--r--pkgs/development/python-modules/avro-python3/default.nix2
-rw-r--r--pkgs/development/python-modules/avro/default.nix2
-rw-r--r--pkgs/development/python-modules/avro3k/default.nix2
-rw-r--r--pkgs/development/python-modules/awesome-slugify/default.nix2
-rw-r--r--pkgs/development/python-modules/b2sdk/default.nix2
-rw-r--r--pkgs/development/python-modules/babelfish/default.nix2
-rw-r--r--pkgs/development/python-modules/babelgladeextractor/default.nix3
-rw-r--r--pkgs/development/python-modules/backports-shutil-which/default.nix2
-rw-r--r--pkgs/development/python-modules/backports_csv/default.nix2
-rw-r--r--pkgs/development/python-modules/backports_os/default.nix2
-rw-r--r--pkgs/development/python-modules/backports_unittest-mock/default.nix2
-rw-r--r--pkgs/development/python-modules/backports_weakref/default.nix2
-rw-r--r--pkgs/development/python-modules/bacpypes/default.nix2
-rw-r--r--pkgs/development/python-modules/bap/default.nix2
-rw-r--r--pkgs/development/python-modules/base58/default.nix2
-rw-r--r--pkgs/development/python-modules/basemap/default.nix2
-rw-r--r--pkgs/development/python-modules/batinfo/default.nix2
-rw-r--r--pkgs/development/python-modules/bayespy/default.nix2
-rw-r--r--pkgs/development/python-modules/bcdoc/default.nix2
-rw-r--r--pkgs/development/python-modules/bcrypt/3_1.nix2
-rw-r--r--pkgs/development/python-modules/bcrypt/default.nix2
-rw-r--r--pkgs/development/python-modules/beancount/default.nix2
-rw-r--r--pkgs/development/python-modules/beanstalkc/default.nix2
-rw-r--r--pkgs/development/python-modules/beautifulsoup4/default.nix2
-rw-r--r--pkgs/development/python-modules/bedup/default.nix2
-rw-r--r--pkgs/development/python-modules/bellows/default.nix2
-rw-r--r--pkgs/development/python-modules/bespon/default.nix2
-rw-r--r--pkgs/development/python-modules/betamax-matchers/default.nix2
-rw-r--r--pkgs/development/python-modules/betamax-serializers/default.nix2
-rw-r--r--pkgs/development/python-modules/betamax/default.nix2
-rw-r--r--pkgs/development/python-modules/billiard/default.nix2
-rw-r--r--pkgs/development/python-modules/binwalk/default.nix2
-rw-r--r--pkgs/development/python-modules/bitbucket-api/default.nix2
-rw-r--r--pkgs/development/python-modules/bitbucket-cli/default.nix2
-rw-r--r--pkgs/development/python-modules/bitmath/default.nix2
-rw-r--r--pkgs/development/python-modules/bitstring/default.nix2
-rw-r--r--pkgs/development/python-modules/bjoern/default.nix2
-rw-r--r--pkgs/development/python-modules/black-macchiato/default.nix2
-rw-r--r--pkgs/development/python-modules/bleak/default.nix2
-rw-r--r--pkgs/development/python-modules/blessed/default.nix2
-rw-r--r--pkgs/development/python-modules/blessings/default.nix2
-rw-r--r--pkgs/development/python-modules/blinker/default.nix2
-rw-r--r--pkgs/development/python-modules/blis/default.nix2
-rw-r--r--pkgs/development/python-modules/blist/default.nix2
-rw-r--r--pkgs/development/python-modules/blivet/default.nix2
-rw-r--r--pkgs/development/python-modules/block-io/default.nix2
-rw-r--r--pkgs/development/python-modules/blockdiag/default.nix2
-rw-r--r--pkgs/development/python-modules/bluepy/default.nix2
-rw-r--r--pkgs/development/python-modules/boltons/default.nix2
-rw-r--r--pkgs/development/python-modules/boltztrap2/default.nix2
-rw-r--r--pkgs/development/python-modules/bottle/default.nix2
-rw-r--r--pkgs/development/python-modules/box2d/default.nix2
-rw-r--r--pkgs/development/python-modules/bpython/default.nix2
-rw-r--r--pkgs/development/python-modules/bsddb3/default.nix2
-rw-r--r--pkgs/development/python-modules/bsdiff4/default.nix2
-rw-r--r--pkgs/development/python-modules/bt-proximity/default.nix2
-rw-r--r--pkgs/development/python-modules/btchip/default.nix2
-rw-r--r--pkgs/development/python-modules/btrees/default.nix2
-rw-r--r--pkgs/development/python-modules/btrfs/default.nix2
-rw-r--r--pkgs/development/python-modules/bugsnag/default.nix2
-rw-r--r--pkgs/development/python-modules/bugwarrior/default.nix2
-rw-r--r--pkgs/development/python-modules/bugz/default.nix2
-rw-r--r--pkgs/development/python-modules/bugzilla/default.nix2
-rw-r--r--pkgs/development/python-modules/buildout/default.nix2
-rw-r--r--pkgs/development/python-modules/bumps/default.nix2
-rw-r--r--pkgs/development/python-modules/bunch/default.nix2
-rw-r--r--pkgs/development/python-modules/bwapy/default.nix2
-rw-r--r--pkgs/development/python-modules/cachecontrol/default.nix2
-rw-r--r--pkgs/development/python-modules/cachelib/default.nix2
-rw-r--r--pkgs/development/python-modules/cachetools/default.nix2
-rw-r--r--pkgs/development/python-modules/cairosvg/1_x.nix2
-rw-r--r--pkgs/development/python-modules/cairosvg/default.nix2
-rw-r--r--pkgs/development/python-modules/canonicaljson/default.nix2
-rw-r--r--pkgs/development/python-modules/carbon/default.nix2
-rw-r--r--pkgs/development/python-modules/carrot/default.nix2
-rw-r--r--pkgs/development/python-modules/case/default.nix2
-rw-r--r--pkgs/development/python-modules/cassandra-driver/default.nix2
-rw-r--r--pkgs/development/python-modules/casttube/default.nix2
-rw-r--r--pkgs/development/python-modules/catalogue/default.nix2
-rw-r--r--pkgs/development/python-modules/cbor/default.nix2
-rw-r--r--pkgs/development/python-modules/cccolutils/default.nix2
-rw-r--r--pkgs/development/python-modules/cement/default.nix2
-rw-r--r--pkgs/development/python-modules/cerberus/default.nix2
-rw-r--r--pkgs/development/python-modules/certipy/default.nix2
-rw-r--r--pkgs/development/python-modules/cgroup-utils/default.nix2
-rw-r--r--pkgs/development/python-modules/chai/default.nix2
-rw-r--r--pkgs/development/python-modules/chainmap/default.nix2
-rw-r--r--pkgs/development/python-modules/chameleon/default.nix2
-rw-r--r--pkgs/development/python-modules/channels-redis/default.nix2
-rw-r--r--pkgs/development/python-modules/channels/default.nix2
-rw-r--r--pkgs/development/python-modules/chardet/default.nix2
-rw-r--r--pkgs/development/python-modules/check-manifest/default.nix2
-rw-r--r--pkgs/development/python-modules/cjson/default.nix2
-rw-r--r--pkgs/development/python-modules/ckcc-protocol/default.nix3
-rw-r--r--pkgs/development/python-modules/clf/default.nix2
-rw-r--r--pkgs/development/python-modules/cliapp/default.nix2
-rw-r--r--pkgs/development/python-modules/click-completion/default.nix2
-rw-r--r--pkgs/development/python-modules/click-didyoumean/default.nix2
-rw-r--r--pkgs/development/python-modules/click-help-colors/default.nix2
-rw-r--r--pkgs/development/python-modules/click-log/default.nix2
-rw-r--r--pkgs/development/python-modules/click-plugins/default.nix2
-rw-r--r--pkgs/development/python-modules/click-repl/default.nix2
-rw-r--r--pkgs/development/python-modules/clickclick/default.nix2
-rw-r--r--pkgs/development/python-modules/cligj/default.nix2
-rw-r--r--pkgs/development/python-modules/clint/default.nix2
-rw-r--r--pkgs/development/python-modules/clize/default.nix2
-rw-r--r--pkgs/development/python-modules/closure-linter/default.nix2
-rw-r--r--pkgs/development/python-modules/cloudpickle/default.nix2
-rw-r--r--pkgs/development/python-modules/clustershell/default.nix2
-rw-r--r--pkgs/development/python-modules/cmdline/default.nix2
-rw-r--r--pkgs/development/python-modules/cmdtest/default.nix2
-rw-r--r--pkgs/development/python-modules/cocotb/default.nix2
-rw-r--r--pkgs/development/python-modules/cogapp/default.nix2
-rw-r--r--pkgs/development/python-modules/coilmq/default.nix2
-rw-r--r--pkgs/development/python-modules/colanderalchemy/default.nix2
-rw-r--r--pkgs/development/python-modules/colorama/default.nix2
-rw-r--r--pkgs/development/python-modules/colorcet/default.nix2
-rw-r--r--pkgs/development/python-modules/colorclass/default.nix2
-rw-r--r--pkgs/development/python-modules/colored/default.nix2
-rw-r--r--pkgs/development/python-modules/colour/default.nix2
-rw-r--r--pkgs/development/python-modules/configobj/default.nix2
-rw-r--r--pkgs/development/python-modules/configshell/default.nix2
-rw-r--r--pkgs/development/python-modules/confluent-kafka/default.nix2
-rw-r--r--pkgs/development/python-modules/constantly/default.nix2
-rw-r--r--pkgs/development/python-modules/consul/default.nix2
-rw-r--r--pkgs/development/python-modules/contexter/default.nix2
-rw-r--r--pkgs/development/python-modules/convertdate/default.nix2
-rw-r--r--pkgs/development/python-modules/cookiecutter/default.nix2
-rw-r--r--pkgs/development/python-modules/cookies/default.nix2
-rw-r--r--pkgs/development/python-modules/coreapi/default.nix2
-rw-r--r--pkgs/development/python-modules/coreschema/default.nix2
-rw-r--r--pkgs/development/python-modules/cornice/default.nix2
-rw-r--r--pkgs/development/python-modules/cov-core/default.nix2
-rw-r--r--pkgs/development/python-modules/cppheaderparser/default.nix2
-rw-r--r--pkgs/development/python-modules/crate/default.nix2
-rw-r--r--pkgs/development/python-modules/crayons/default.nix2
-rw-r--r--pkgs/development/python-modules/crc16/default.nix2
-rw-r--r--pkgs/development/python-modules/crccheck/default.nix2
-rw-r--r--pkgs/development/python-modules/crcmod/default.nix2
-rw-r--r--pkgs/development/python-modules/credstash/default.nix2
-rw-r--r--pkgs/development/python-modules/cryptacular/default.nix2
-rw-r--r--pkgs/development/python-modules/cssmin/default.nix2
-rw-r--r--pkgs/development/python-modules/cssselect/default.nix2
-rw-r--r--pkgs/development/python-modules/cssutils/default.nix2
-rw-r--r--pkgs/development/python-modules/cupy/default.nix2
-rw-r--r--pkgs/development/python-modules/curtsies/default.nix2
-rw-r--r--pkgs/development/python-modules/curve25519-donna/default.nix2
-rw-r--r--pkgs/development/python-modules/cvxopt/default.nix3
-rw-r--r--pkgs/development/python-modules/cx_freeze/default.nix2
-rw-r--r--pkgs/development/python-modules/cx_oracle/default.nix2
-rw-r--r--pkgs/development/python-modules/cymem/default.nix2
-rw-r--r--pkgs/development/python-modules/cypari2/default.nix2
-rw-r--r--pkgs/development/python-modules/daemonize/default.nix2
-rw-r--r--pkgs/development/python-modules/darcsver/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-glm/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-image/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-jobqueue/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-ml/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-mpi/default.nix2
-rw-r--r--pkgs/development/python-modules/dask-xgboost/default.nix2
-rw-r--r--pkgs/development/python-modules/databricks-cli/default.nix2
-rw-r--r--pkgs/development/python-modules/dataclasses/default.nix2
-rw-r--r--pkgs/development/python-modules/datadiff/default.nix2
-rw-r--r--pkgs/development/python-modules/datamodeldict/default.nix2
-rw-r--r--pkgs/development/python-modules/dateutil/default.nix2
-rw-r--r--pkgs/development/python-modules/datrie/default.nix2
-rw-r--r--pkgs/development/python-modules/dbf/default.nix2
-rw-r--r--pkgs/development/python-modules/dbfread/default.nix2
-rw-r--r--pkgs/development/python-modules/dbus-next/default.nix2
-rw-r--r--pkgs/development/python-modules/dbutils/default.nix2
-rw-r--r--pkgs/development/python-modules/dcmstack/default.nix2
-rw-r--r--pkgs/development/python-modules/deap/default.nix2
-rw-r--r--pkgs/development/python-modules/deluge-client/default.nix2
-rw-r--r--pkgs/development/python-modules/demjson/default.nix2
-rw-r--r--pkgs/development/python-modules/dependency-injector/default.nix2
-rw-r--r--pkgs/development/python-modules/deprecated/default.nix2
-rw-r--r--pkgs/development/python-modules/derpconf/default.nix2
-rw-r--r--pkgs/development/python-modules/descartes/default.nix2
-rw-r--r--pkgs/development/python-modules/deskcon/default.nix2
-rw-r--r--pkgs/development/python-modules/diff_cover/default.nix2
-rw-r--r--pkgs/development/python-modules/digi-xbee/default.nix2
-rw-r--r--pkgs/development/python-modules/discogs_client/default.nix2
-rw-r--r--pkgs/development/python-modules/distlib/default.nix2
-rw-r--r--pkgs/development/python-modules/distorm3/default.nix2
-rw-r--r--pkgs/development/python-modules/distro/default.nix2
-rw-r--r--pkgs/development/python-modules/distutils_extra/default.nix2
-rw-r--r--pkgs/development/python-modules/dj-email-url/default.nix2
-rw-r--r--pkgs/development/python-modules/dj-search-url/default.nix2
-rw-r--r--pkgs/development/python-modules/django-allauth/default.nix2
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-rw-r--r--pkgs/development/python-modules/django-cleanup/default.nix2
-rw-r--r--pkgs/development/python-modules/django-compat/default.nix2
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-rw-r--r--pkgs/development/python-modules/django-logentry-admin/default.nix2
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-rw-r--r--pkgs/development/python-modules/django_contrib_comments/default.nix2
-rw-r--r--pkgs/development/python-modules/django_environ/default.nix2
-rw-r--r--pkgs/development/python-modules/django_evolution/default.nix2
-rw-r--r--pkgs/development/python-modules/django_guardian/default.nix2
-rw-r--r--pkgs/development/python-modules/django_modelcluster/default.nix2
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-rw-r--r--pkgs/development/python-modules/django_redis/default.nix2
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-rw-r--r--pkgs/development/python-modules/django_silk/default.nix2
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-rw-r--r--pkgs/development/python-modules/docker-pycreds/default.nix2
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1506 files changed, 1506 insertions, 1528 deletions
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 }: