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-rw-r--r--pkgs/development/compilers/gcc/10/default.nix18
-rw-r--r--pkgs/development/compilers/gcc/11/default.nix23
-rw-r--r--pkgs/development/compilers/gcc/6/default.nix9
-rw-r--r--pkgs/development/compilers/gcc/7/default.nix18
-rw-r--r--pkgs/development/compilers/gcc/8/default.nix18
-rw-r--r--pkgs/development/compilers/gcc/9/default.nix18
-rw-r--r--pkgs/development/compilers/gcc/common/configure-flags.nix3
-rw-r--r--pkgs/development/compilers/llvm/10/bintools/default.nix (renamed from pkgs/development/compilers/llvm/10/bintools.nix)0
-rw-r--r--pkgs/development/compilers/llvm/10/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/10/compiler-rt/default.nix30
-rw-r--r--pkgs/development/compilers/llvm/10/default.nix148
-rw-r--r--pkgs/development/compilers/llvm/10/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/10/libc++/default.nix)21
-rw-r--r--pkgs/development/compilers/llvm/10/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/10/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/10/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/10/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/10/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/10/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/10/libcxxabi/no-threads.patch (renamed from pkgs/development/compilers/llvm/10/libc++abi/no-threads.patch)0
-rw-r--r--pkgs/development/compilers/llvm/10/libcxxabi/wasm.patch (renamed from pkgs/development/compilers/llvm/10/libc++abi/wasm.patch)0
-rw-r--r--pkgs/development/compilers/llvm/10/libunwind/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/10/lld/default.nix18
-rw-r--r--pkgs/development/compilers/llvm/10/lldb/default.nix18
-rw-r--r--pkgs/development/compilers/llvm/10/llvm/default.nix37
-rw-r--r--pkgs/development/compilers/llvm/10/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/10/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/llvm/11/bintools/default.nix (renamed from pkgs/development/compilers/llvm/11/bintools.nix)0
-rw-r--r--pkgs/development/compilers/llvm/11/clang/default.nix37
-rw-r--r--pkgs/development/compilers/llvm/11/compiler-rt/default.nix41
-rw-r--r--pkgs/development/compilers/llvm/11/default.nix148
-rw-r--r--pkgs/development/compilers/llvm/11/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/11/libc++/default.nix)36
-rw-r--r--pkgs/development/compilers/llvm/11/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/11/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/11/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/11/libc++abi/default.nix)20
-rw-r--r--pkgs/development/compilers/llvm/11/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/11/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/11/libcxxabi/no-threads.patch (renamed from pkgs/development/compilers/llvm/11/libc++abi/no-threads.patch)0
-rw-r--r--pkgs/development/compilers/llvm/11/libcxxabi/wasm.patch (renamed from pkgs/development/compilers/llvm/11/libc++abi/wasm.patch)0
-rw-r--r--pkgs/development/compilers/llvm/11/libunwind/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/11/lld/default.nix18
-rw-r--r--pkgs/development/compilers/llvm/11/lldb/default.nix18
-rw-r--r--pkgs/development/compilers/llvm/11/llvm/default.nix37
-rw-r--r--pkgs/development/compilers/llvm/11/openmp.nix35
-rw-r--r--pkgs/development/compilers/llvm/11/openmp/default.nix44
-rw-r--r--pkgs/development/compilers/llvm/12/compiler-rt/default.nix13
-rw-r--r--pkgs/development/compilers/llvm/12/default.nix131
-rw-r--r--pkgs/development/compilers/llvm/12/libcxx/default.nix8
-rw-r--r--pkgs/development/compilers/llvm/12/libcxx/gnu-install-dirs.patch100
-rw-r--r--pkgs/development/compilers/llvm/12/libcxxabi/default.nix30
-rw-r--r--pkgs/development/compilers/llvm/12/libcxxabi/gnu-install-dirs.patch34
-rw-r--r--pkgs/development/compilers/llvm/12/lld/default.nix16
-rw-r--r--pkgs/development/compilers/llvm/12/llvm/default.nix13
-rw-r--r--pkgs/development/compilers/llvm/5/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/5/compiler-rt/default.nix17
-rw-r--r--pkgs/development/compilers/llvm/5/default.nix43
-rw-r--r--pkgs/development/compilers/llvm/5/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/5/libc++/default.nix)17
-rw-r--r--pkgs/development/compilers/llvm/5/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/5/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/5/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/5/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/5/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/5/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/5/lld/default.nix21
-rw-r--r--pkgs/development/compilers/llvm/5/lldb/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/5/llvm/default.nix29
-rw-r--r--pkgs/development/compilers/llvm/5/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/5/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/llvm/6/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/6/compiler-rt/default.nix17
-rw-r--r--pkgs/development/compilers/llvm/6/default.nix43
-rw-r--r--pkgs/development/compilers/llvm/6/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/6/libc++/default.nix)17
-rw-r--r--pkgs/development/compilers/llvm/6/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/6/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/6/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/6/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/6/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/6/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/6/lld/default.nix22
-rw-r--r--pkgs/development/compilers/llvm/6/lldb/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/6/llvm/default.nix29
-rw-r--r--pkgs/development/compilers/llvm/6/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/6/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/llvm/7/bintools/default.nix (renamed from pkgs/development/compilers/llvm/7/bintools.nix)0
-rw-r--r--pkgs/development/compilers/llvm/7/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/7/compiler-rt/default.nix33
-rw-r--r--pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch2
-rw-r--r--pkgs/development/compilers/llvm/7/default.nix152
-rw-r--r--pkgs/development/compilers/llvm/7/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/7/libc++/default.nix)23
-rw-r--r--pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/7/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/7/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/7/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/7/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/7/libunwind/default.nix28
-rw-r--r--pkgs/development/compilers/llvm/7/lld/default.nix22
-rw-r--r--pkgs/development/compilers/llvm/7/lldb/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/7/llvm/default.nix29
-rw-r--r--pkgs/development/compilers/llvm/7/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/7/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/llvm/8/bintools/default.nix (renamed from pkgs/development/compilers/llvm/8/bintools.nix)0
-rw-r--r--pkgs/development/compilers/llvm/8/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/8/compiler-rt/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/8/compiler-rt/gnu-install-dirs.patch2
-rw-r--r--pkgs/development/compilers/llvm/8/default.nix155
-rw-r--r--pkgs/development/compilers/llvm/8/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/8/libc++/default.nix)21
-rw-r--r--pkgs/development/compilers/llvm/8/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/8/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/8/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/8/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/8/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/8/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/8/libcxxabi/no-threads.patch (renamed from pkgs/development/compilers/llvm/8/libc++abi/no-threads.patch)0
-rw-r--r--pkgs/development/compilers/llvm/8/libcxxabi/wasm.patch (renamed from pkgs/development/compilers/llvm/8/libc++abi/wasm.patch)0
-rw-r--r--pkgs/development/compilers/llvm/8/libunwind/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/8/lld/default.nix22
-rw-r--r--pkgs/development/compilers/llvm/8/lldb/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/8/llvm/default.nix29
-rw-r--r--pkgs/development/compilers/llvm/8/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/8/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/llvm/9/bintools/default.nix (renamed from pkgs/development/compilers/llvm/9/bintools.nix)0
-rw-r--r--pkgs/development/compilers/llvm/9/clang/default.nix25
-rw-r--r--pkgs/development/compilers/llvm/9/compiler-rt/default.nix30
-rw-r--r--pkgs/development/compilers/llvm/9/compiler-rt/gnu-install-dirs.patch2
-rw-r--r--pkgs/development/compilers/llvm/9/default.nix155
-rw-r--r--pkgs/development/compilers/llvm/9/libcxx/default.nix (renamed from pkgs/development/compilers/llvm/9/libc++/default.nix)21
-rw-r--r--pkgs/development/compilers/llvm/9/libcxx/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/9/libc++/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/9/libcxxabi/default.nix (renamed from pkgs/development/compilers/llvm/9/libc++abi/default.nix)18
-rw-r--r--pkgs/development/compilers/llvm/9/libcxxabi/gnu-install-dirs.patch (renamed from pkgs/development/compilers/llvm/9/libc++abi/gnu-install-dirs.patch)0
-rw-r--r--pkgs/development/compilers/llvm/9/libcxxabi/no-threads.patch (renamed from pkgs/development/compilers/llvm/9/libc++abi/no-threads.patch)0
-rw-r--r--pkgs/development/compilers/llvm/9/libcxxabi/wasm.patch (renamed from pkgs/development/compilers/llvm/9/libc++abi/wasm.patch)0
-rw-r--r--pkgs/development/compilers/llvm/9/libunwind/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/9/lld/default.nix18
-rw-r--r--pkgs/development/compilers/llvm/9/lldb/default.nix14
-rw-r--r--pkgs/development/compilers/llvm/9/llvm/default.nix32
-rw-r--r--pkgs/development/compilers/llvm/9/openmp.nix25
-rw-r--r--pkgs/development/compilers/llvm/9/openmp/default.nix34
-rw-r--r--pkgs/development/compilers/rust/1_52.nix (renamed from pkgs/development/compilers/rust/1_51.nix)28
-rw-r--r--pkgs/development/compilers/rust/cargo.nix4
-rw-r--r--pkgs/development/compilers/rust/rustc.nix3
-rw-r--r--pkgs/development/compilers/sbcl/2.0.8.nix4
-rw-r--r--pkgs/development/compilers/sbcl/bootstrap.nix5
-rw-r--r--pkgs/development/compilers/sbcl/common.nix4
-rw-r--r--pkgs/development/compilers/zz/default.nix2
-rw-r--r--pkgs/development/haskell-modules/configuration-common.nix18
-rw-r--r--pkgs/development/interpreters/python/cpython/2.7/default.nix2
-rw-r--r--pkgs/development/interpreters/python/default.nix3
-rw-r--r--pkgs/development/interpreters/python/hooks/pytest-check-hook.sh7
-rw-r--r--pkgs/development/interpreters/python/mk-python-derivation.nix5
-rw-r--r--pkgs/development/interpreters/wasmer/default.nix2
-rw-r--r--pkgs/development/interpreters/wasmtime/default.nix2
-rw-r--r--pkgs/development/libraries/abseil-cpp/cmake-full-dirs.patch15
-rw-r--r--pkgs/development/libraries/abseil-cpp/default.nix15
-rw-r--r--pkgs/development/libraries/apr/default.nix6
-rw-r--r--pkgs/development/libraries/caf/default.nix4
-rw-r--r--pkgs/development/libraries/cairomm/1.16.nix4
-rw-r--r--pkgs/development/libraries/catch/default.nix10
-rw-r--r--pkgs/development/libraries/cereal/default.nix16
-rw-r--r--pkgs/development/libraries/fontconfig/default.nix5
-rw-r--r--pkgs/development/libraries/fontconfig/macos-atomics.h39
-rw-r--r--pkgs/development/libraries/gcr/default.nix2
-rw-r--r--pkgs/development/libraries/glib/default.nix5
-rw-r--r--pkgs/development/libraries/glib/link-with-coreservices.patch11
-rw-r--r--pkgs/development/libraries/glibc/common.nix7
-rw-r--r--pkgs/development/libraries/glibc/default.nix2
-rw-r--r--pkgs/development/libraries/glibc/info.nix2
-rw-r--r--pkgs/development/libraries/glibc/locales.nix2
-rw-r--r--pkgs/development/libraries/glibmm/2.68.nix4
-rw-r--r--pkgs/development/libraries/glibmm/default.nix2
-rw-r--r--pkgs/development/libraries/gmp/6.x.nix2
-rw-r--r--pkgs/development/libraries/gsl/default.nix4
-rw-r--r--pkgs/development/libraries/gtk/2.x.nix4
-rw-r--r--pkgs/development/libraries/gtkmm/3.x.nix2
-rw-r--r--pkgs/development/libraries/kde-frameworks/fetch.sh2
-rw-r--r--pkgs/development/libraries/kde-frameworks/srcs.nix664
-rw-r--r--pkgs/development/libraries/libevent/default.nix4
-rw-r--r--pkgs/development/libraries/libical/default.nix4
-rw-r--r--pkgs/development/libraries/libidn2/default.nix10
-rw-r--r--pkgs/development/libraries/liblinphone/default.nix4
-rw-r--r--pkgs/development/libraries/libsoup/default.nix10
-rw-r--r--pkgs/development/libraries/libspnav/configure-socket-path.patch47
-rw-r--r--pkgs/development/libraries/libspnav/default.nix6
-rw-r--r--pkgs/development/libraries/libxml2/default.nix34
-rw-r--r--pkgs/development/libraries/libxslt/default.nix9
-rw-r--r--pkgs/development/libraries/lmdb/default.nix2
-rw-r--r--pkgs/development/libraries/lyra/default.nix2
-rw-r--r--pkgs/development/libraries/mesa/default.nix1
-rw-r--r--pkgs/development/libraries/openbsm/default.nix4
-rw-r--r--pkgs/development/libraries/openldap/default.nix4
-rw-r--r--pkgs/development/libraries/openssl/default.nix1
-rw-r--r--pkgs/development/libraries/pcre/default.nix3
-rw-r--r--pkgs/development/libraries/pcre2/default.nix3
-rw-r--r--pkgs/development/libraries/poppler/default.nix110
-rw-r--r--pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0003-qtbase-mkspecs.patch54
-rw-r--r--pkgs/development/libraries/qt-5/5.14/qtbase.patch.d/0003-qtbase-mkspecs.patch50
-rw-r--r--pkgs/development/libraries/qt-5/5.15/qtbase.patch.d/0003-qtbase-mkspecs.patch60
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtcharts.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtconnectivity.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtdeclarative.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtdoc.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtgamepad.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtgraphicaleffects.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtimageformats.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtlocation.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtmacextras.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtmultimedia.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtnetworkauth.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtquickcontrols.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtquickcontrols2.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtscript.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtscxml.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtsensors.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtserialbus.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtserialport.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtspeech.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtsvg.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qttools.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qttranslations.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtvirtualkeyboard.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwayland.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebchannel.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebengine.nix10
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebglplugin.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebkit.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebsockets.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtwebview.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtx11extras.nix2
-rw-r--r--pkgs/development/libraries/qt-5/modules/qtxmlpatterns.nix2
-rw-r--r--pkgs/development/libraries/qt-5/qtModule.nix2
-rw-r--r--pkgs/development/libraries/science/math/or-tools/default.nix14
-rw-r--r--pkgs/development/libraries/spdk/default.nix2
-rw-r--r--pkgs/development/libraries/wasilibc/default.nix3
-rw-r--r--pkgs/development/libraries/wayland/default.nix6
-rw-r--r--pkgs/development/libraries/zlib/default.nix4
-rw-r--r--pkgs/development/lisp-modules/lisp-packages.nix9
-rw-r--r--pkgs/development/misc/loc/default.nix2
-rw-r--r--pkgs/development/python-modules/aiohomekit/default.nix4
-rw-r--r--pkgs/development/python-modules/arrow/1.nix41
-rw-r--r--pkgs/development/python-modules/arrow/default.nix24
-rw-r--r--pkgs/development/python-modules/azure-core/default.nix13
-rw-r--r--pkgs/development/python-modules/azure-eventgrid/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-identity/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-billing/default.nix6
-rw-r--r--pkgs/development/python-modules/azure-mgmt-botservice/default.nix12
-rw-r--r--pkgs/development/python-modules/azure-mgmt-cosmosdb/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-deploymentmanager/default.nix12
-rw-r--r--pkgs/development/python-modules/azure-mgmt-iothub/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-loganalytics/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-maps/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-network/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-redhatopenshift/default.nix6
-rw-r--r--pkgs/development/python-modules/azure-mgmt-reservations/default.nix6
-rw-r--r--pkgs/development/python-modules/azure-mgmt-resource/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-sql/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-mgmt-storage/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-servicebus/default.nix4
-rw-r--r--pkgs/development/python-modules/azure-synapse-artifacts/default.nix4
-rw-r--r--pkgs/development/python-modules/cryptography/default.nix15
-rw-r--r--pkgs/development/python-modules/dbus/default.nix6
-rw-r--r--pkgs/development/python-modules/debugpy/default.nix2
-rw-r--r--pkgs/development/python-modules/delorean/default.nix32
-rw-r--r--pkgs/development/python-modules/flufl/lock.nix5
-rw-r--r--pkgs/development/python-modules/gensim/default.nix4
-rw-r--r--pkgs/development/python-modules/get-video-properties/default.nix35
-rw-r--r--pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix52
-rw-r--r--pkgs/development/python-modules/ibm-watson/default.nix53
-rw-r--r--pkgs/development/python-modules/johnnycanencrypt/default.nix2
-rw-r--r--pkgs/development/python-modules/jupyter_server/default.nix4
-rw-r--r--pkgs/development/python-modules/matrix-api-async/default.nix25
-rw-r--r--pkgs/development/python-modules/mattermostdriver/default.nix33
-rw-r--r--pkgs/development/python-modules/mockupdb/default.nix24
-rw-r--r--pkgs/development/python-modules/motor/default.nix30
-rw-r--r--pkgs/development/python-modules/opsdroid_get_image_size/default.nix24
-rw-r--r--pkgs/development/python-modules/pathy/default.nix4
-rw-r--r--pkgs/development/python-modules/psutil/default.nix21
-rw-r--r--pkgs/development/python-modules/puremagic/default.nix29
-rw-r--r--pkgs/development/python-modules/pybind11/default.nix8
-rw-r--r--pkgs/development/python-modules/pycron/default.nix30
-rw-r--r--pkgs/development/python-modules/pygls/default.nix2
-rw-r--r--pkgs/development/python-modules/pymumble/default.nix27
-rw-r--r--pkgs/development/python-modules/pytest-datadir/default.nix2
-rw-r--r--pkgs/development/python-modules/pytorch/default.nix3
-rw-r--r--pkgs/development/python-modules/pyvex/default.nix4
-rw-r--r--pkgs/development/python-modules/smart-open/default.nix (renamed from pkgs/development/python-modules/smart_open/default.nix)8
-rw-r--r--pkgs/development/python-modules/token-bucket/default.nix34
-rw-r--r--pkgs/development/python-modules/udatetime/default.nix35
-rw-r--r--pkgs/development/python-modules/vdf/default.nix18
-rw-r--r--pkgs/development/python-modules/watchgod/default.nix27
-rw-r--r--pkgs/development/python-modules/xdg/default.nix4
-rw-r--r--pkgs/development/ruby-modules/gem-config/default.nix8
-rw-r--r--pkgs/development/tools/analysis/bingrep/default.nix2
-rw-r--r--pkgs/development/tools/analysis/cargo-tarpaulin/default.nix2
-rw-r--r--pkgs/development/tools/analysis/dotenv-linter/default.nix2
-rw-r--r--pkgs/development/tools/analysis/panopticon/default.nix2
-rw-r--r--pkgs/development/tools/analysis/qcachegrind/default.nix2
-rw-r--r--pkgs/development/tools/analysis/svlint/default.nix2
-rw-r--r--pkgs/development/tools/async/default.nix2
-rw-r--r--pkgs/development/tools/build-managers/cmake/default.nix12
-rw-r--r--pkgs/development/tools/build-managers/fac/default.nix2
-rw-r--r--pkgs/development/tools/bunyan-rs/default.nix25
-rw-r--r--pkgs/development/tools/cargo-flamegraph/default.nix2
-rw-r--r--pkgs/development/tools/cargo-web/default.nix2
-rw-r--r--pkgs/development/tools/chit/default.nix2
-rw-r--r--pkgs/development/tools/clog-cli/default.nix2
-rw-r--r--pkgs/development/tools/cmake-language-server/default.nix16
-rw-r--r--pkgs/development/tools/cmake-language-server/disable-test-timeouts.patch13
-rw-r--r--pkgs/development/tools/continuous-integration/gitlab-runner/default.nix2
-rw-r--r--pkgs/development/tools/convco/default.nix2
-rw-r--r--pkgs/development/tools/diesel-cli/default.nix2
-rw-r--r--pkgs/development/tools/documentation/gi-docgen/default.nix59
-rw-r--r--pkgs/development/tools/documentation/mdsh/default.nix2
-rw-r--r--pkgs/development/tools/dot-http/default.nix2
-rw-r--r--pkgs/development/tools/git-aggregator/default.nix40
-rw-r--r--pkgs/development/tools/git-series/default.nix2
-rw-r--r--pkgs/development/tools/kustomize/default.nix6
-rw-r--r--pkgs/development/tools/misc/autoconf/default.nix4
-rw-r--r--pkgs/development/tools/misc/autogen/default.nix4
-rw-r--r--pkgs/development/tools/misc/ccache/default.nix2
-rw-r--r--pkgs/development/tools/misc/ctags/default.nix7
-rw-r--r--pkgs/development/tools/misc/ctags/unused-collision.patch246
-rw-r--r--pkgs/development/tools/misc/gdb/default.nix4
-rw-r--r--pkgs/development/tools/misc/hydra-cli/default.nix2
-rw-r--r--pkgs/development/tools/misc/itm-tools/default.nix2
-rw-r--r--pkgs/development/tools/misc/libtool/libtool2-macos11.patch32
-rw-r--r--pkgs/development/tools/misc/libtool/libtool2.nix28
-rw-r--r--pkgs/development/tools/misc/mdctags/default.nix2
-rw-r--r--pkgs/development/tools/misc/ptags/default.nix2
-rw-r--r--pkgs/development/tools/misc/rtss/default.nix2
-rw-r--r--pkgs/development/tools/misc/sccache/default.nix2
-rw-r--r--pkgs/development/tools/misc/svls/default.nix2
-rw-r--r--pkgs/development/tools/misc/texlab/default.nix9
-rw-r--r--pkgs/development/tools/misc/tokei/default.nix2
-rw-r--r--pkgs/development/tools/misc/unused/default.nix2
-rw-r--r--pkgs/development/tools/misc/wishbone-tool/default.nix2
-rw-r--r--pkgs/development/tools/pactorio/default.nix2
-rw-r--r--pkgs/development/tools/parinfer-rust/default.nix2
-rw-r--r--pkgs/development/tools/parsing/flex/default.nix4
-rw-r--r--pkgs/development/tools/parsing/tree-sitter/default.nix2
-rw-r--r--pkgs/development/tools/pax-rs/default.nix2
-rw-r--r--pkgs/development/tools/pqrs/default.nix2
-rw-r--r--pkgs/development/tools/py-spy/default.nix2
-rw-r--r--pkgs/development/tools/rebazel/default.nix2
-rw-r--r--pkgs/development/tools/rnix-lsp/default.nix2
-rw-r--r--pkgs/development/tools/rq/default.nix10
-rw-r--r--pkgs/development/tools/rust/cargo-asm/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-binutils/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-bloat/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-c/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-criterion/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-cross/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-feature/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-fund/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-geiger/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-generate/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-inspect/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-play/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-readme/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-sweep/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-sync-readme/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-valgrind/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-whatfeatures/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-wipe/default.nix2
-rw-r--r--pkgs/development/tools/rust/cargo-xbuild/default.nix2
-rw-r--r--pkgs/development/tools/rust/crate2nix/default.nix2
-rw-r--r--pkgs/development/tools/rust/racerd/default.nix2
-rw-r--r--pkgs/development/tools/so/default.nix2
-rw-r--r--pkgs/development/tools/the-way/default.nix2
-rw-r--r--pkgs/development/tools/trunk/default.nix2
-rw-r--r--pkgs/development/tools/wasm-bindgen-cli/default.nix2
-rw-r--r--pkgs/development/tools/wasm-pack/default.nix2
-rw-r--r--pkgs/development/tools/xcbuild/platforms.nix30
-rw-r--r--pkgs/development/tools/xcbuild/wrapper.nix2
-rw-r--r--pkgs/development/web/twitter-bootstrap/default.nix4
356 files changed, 4100 insertions, 1769 deletions
diff --git a/pkgs/development/compilers/gcc/10/default.nix b/pkgs/development/compilers/gcc/10/default.nix
index aebe7b30f1a78..1b4aa6b3214c0 100644
--- a/pkgs/development/compilers/gcc/10/default.nix
+++ b/pkgs/development/compilers/gcc/10/default.nix
@@ -103,9 +103,15 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
+  postPatch = ''
+    configureScripts=$(find . -name configure)
+    for configureScript in $configureScripts; do
+      patchShebangs $configureScript
+    done
+  ''
   # This should kill all the stdinc frameworks that gcc and friends like to
   # insert into default search paths.
-  prePatch = lib.optionalString hostPlatform.isDarwin ''
+  + lib.optionalString hostPlatform.isDarwin ''
     substituteInPlace gcc/config/darwin-c.c \
       --replace 'if (stdinc)' 'if (0)'
 
@@ -114,14 +120,8 @@ stdenv.mkDerivation ({
 
     substituteInPlace libgfortran/configure \
       --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-  '';
-
-  postPatch = ''
-    configureScripts=$(find . -name configure)
-    for configureScript in $configureScripts; do
-      patchShebangs $configureScript
-    done
-  '' + (
+  ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
diff --git a/pkgs/development/compilers/gcc/11/default.nix b/pkgs/development/compilers/gcc/11/default.nix
index c9d8663c0c401..cff1abf726734 100644
--- a/pkgs/development/compilers/gcc/11/default.nix
+++ b/pkgs/development/compilers/gcc/11/default.nix
@@ -72,6 +72,11 @@ let majorVersion = "11";
       ++ optional langFortran ../gfortran-driving.patch
       ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch
 
+      ++ optional (stdenv.isDarwin && stdenv.isAarch64) (fetchpatch {
+        url = "https://github.com/fxcoudert/gcc/compare/releases/gcc-11.1.0...gcc-11.1.0-arm-20210504.diff";
+        sha256 = "sha256-JqCGJAfbOxSmkNyq49aFHteK/RFsCSLQrL9mzUCnaD0=";
+      })
+
       # Obtain latest patch with ../update-mcfgthread-patches.sh
       ++ optional (!crossStageStatic && targetPlatform.isMinGW) ./Added-mcf-thread-model-support-from-mcfgthread.patch;
 
@@ -103,9 +108,15 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
+  postPatch = ''
+    configureScripts=$(find . -name configure)
+    for configureScript in $configureScripts; do
+      patchShebangs $configureScript
+    done
+  ''
   # This should kill all the stdinc frameworks that gcc and friends like to
   # insert into default search paths.
-  prePatch = lib.optionalString hostPlatform.isDarwin ''
+  + lib.optionalString hostPlatform.isDarwin ''
     substituteInPlace gcc/config/darwin-c.c \
       --replace 'if (stdinc)' 'if (0)'
 
@@ -114,14 +125,8 @@ stdenv.mkDerivation ({
 
     substituteInPlace libgfortran/configure \
       --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-  '';
-
-  postPatch = ''
-    configureScripts=$(find . -name configure)
-    for configureScript in $configureScripts; do
-      patchShebangs $configureScript
-    done
-  '' + (
+  ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 069d9c18a62b5..b70d8a57b9d20 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -154,7 +154,7 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
-  prePatch =
+  postPatch =
     # This should kill all the stdinc frameworks that gcc and friends like to
     # insert into default search paths.
     lib.optionalString hostPlatform.isDarwin ''
@@ -166,9 +166,8 @@ stdenv.mkDerivation ({
 
       substituteInPlace libgfortran/configure \
         --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-    '';
-
-  postPatch =
+    ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
@@ -191,7 +190,7 @@ stdenv.mkDerivation ({
             sed -i gcc/config/linux.h -e '1i#undef LOCAL_INCLUDE_DIR'
         ''
         )
-    else null;
+    else "");
 
   inherit noSysDirs staticCompiler langJava crossStageStatic
     libcCross crossMingw;
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index 1f153b0fb3a3d..5ffe6aba90f1c 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -114,9 +114,15 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
+  postPatch = ''
+    configureScripts=$(find . -name configure)
+    for configureScript in $configureScripts; do
+      patchShebangs $configureScript
+    done
+  ''
   # This should kill all the stdinc frameworks that gcc and friends like to
   # insert into default search paths.
-  prePatch = lib.optionalString hostPlatform.isDarwin ''
+  + lib.optionalString hostPlatform.isDarwin ''
     substituteInPlace gcc/config/darwin-c.c \
       --replace 'if (stdinc)' 'if (0)'
 
@@ -125,14 +131,8 @@ stdenv.mkDerivation ({
 
     substituteInPlace libgfortran/configure \
       --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-  '';
-
-  postPatch = ''
-    configureScripts=$(find . -name configure)
-    for configureScript in $configureScripts; do
-      patchShebangs $configureScript
-    done
-  '' + (
+  ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index 4d9e216947d49..754f189d508fb 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -101,9 +101,15 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
+  postPatch = ''
+    configureScripts=$(find . -name configure)
+    for configureScript in $configureScripts; do
+      patchShebangs $configureScript
+    done
+  ''
   # This should kill all the stdinc frameworks that gcc and friends like to
   # insert into default search paths.
-  prePatch = lib.optionalString hostPlatform.isDarwin ''
+  + lib.optionalString hostPlatform.isDarwin ''
     substituteInPlace gcc/config/darwin-c.c \
       --replace 'if (stdinc)' 'if (0)'
 
@@ -112,14 +118,8 @@ stdenv.mkDerivation ({
 
     substituteInPlace libgfortran/configure \
       --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-  '';
-
-  postPatch = ''
-    configureScripts=$(find . -name configure)
-    for configureScript in $configureScripts; do
-      patchShebangs $configureScript
-    done
-  '' + (
+  ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
diff --git a/pkgs/development/compilers/gcc/9/default.nix b/pkgs/development/compilers/gcc/9/default.nix
index 09cf7e98db799..5be6dc5811ec0 100644
--- a/pkgs/development/compilers/gcc/9/default.nix
+++ b/pkgs/development/compilers/gcc/9/default.nix
@@ -117,9 +117,15 @@ stdenv.mkDerivation ({
 
   hardeningDisable = [ "format" "pie" ];
 
+  postPatch = ''
+    configureScripts=$(find . -name configure)
+    for configureScript in $configureScripts; do
+      patchShebangs $configureScript
+    done
+  ''
   # This should kill all the stdinc frameworks that gcc and friends like to
   # insert into default search paths.
-  prePatch = lib.optionalString hostPlatform.isDarwin ''
+  + lib.optionalString hostPlatform.isDarwin ''
     substituteInPlace gcc/config/darwin-c.c \
       --replace 'if (stdinc)' 'if (0)'
 
@@ -128,14 +134,8 @@ stdenv.mkDerivation ({
 
     substituteInPlace libgfortran/configure \
       --replace "-install_name \\\$rpath/\\\$soname" "-install_name ''${!outputLib}/lib/\\\$soname"
-  '';
-
-  postPatch = ''
-    configureScripts=$(find . -name configure)
-    for configureScript in $configureScripts; do
-      patchShebangs $configureScript
-    done
-  '' + (
+  ''
+  + (
     if targetPlatform != hostPlatform || stdenv.cc.libc != null then
       # On NixOS, use the right path to the dynamic linker instead of
       # `/lib/ld*.so'.
diff --git a/pkgs/development/compilers/gcc/common/configure-flags.nix b/pkgs/development/compilers/gcc/common/configure-flags.nix
index 42deb970dfeab..997771c2abfe9 100644
--- a/pkgs/development/compilers/gcc/common/configure-flags.nix
+++ b/pkgs/development/compilers/gcc/common/configure-flags.nix
@@ -185,7 +185,8 @@ let
     ++ lib.optional javaAwtGtk "--enable-java-awt=gtk"
     ++ lib.optional (langJava && javaAntlr != null) "--with-antlr-jar=${javaAntlr}"
 
-    ++ (import ../common/platform-flags.nix { inherit (stdenv)  targetPlatform; inherit lib; })
+    # TODO: aarch64-darwin has clang stdenv and its arch and cpu flag values are incompatible with gcc
+    ++ lib.optional (!(stdenv.isDarwin && stdenv.isAarch64)) (import ../common/platform-flags.nix { inherit (stdenv)  targetPlatform; inherit lib; })
     ++ lib.optionals (targetPlatform != hostPlatform) crossConfigureFlags
     ++ lib.optional (targetPlatform != hostPlatform) "--disable-bootstrap"
 
diff --git a/pkgs/development/compilers/llvm/10/bintools.nix b/pkgs/development/compilers/llvm/10/bintools/default.nix
index 53f7941e33699..53f7941e33699 100644
--- a/pkgs/development/compilers/llvm/10/bintools.nix
+++ b/pkgs/development/compilers/llvm/10/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/10/clang/default.nix b/pkgs/development/compilers/llvm/10/clang/default.nix
index d228c4261afe9..e0c52651cadc5 100644
--- a/pkgs/development/compilers/llvm/10/clang/default.nix
+++ b/pkgs/development/compilers/llvm/10/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -96,11 +96,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -119,6 +128,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/10/compiler-rt/default.nix b/pkgs/development/compilers/llvm/10/compiler-rt/default.nix
index 1f990ac433d2f..37c7e0599b5f0 100644
--- a/pkgs/development/compilers/llvm/10/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/10/compiler-rt/default.nix
@@ -1,17 +1,18 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
-stdenv.mkDerivation rec {
-  pname = "compiler-rt";
+stdenv.mkDerivation {
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
-  src = fetch pname "1yjqjri753w0fzmxcyz687nvd97sbc9rsqrxzpq720na47hwh3fr";
+  src = fetch "compiler-rt" "1yjqjri753w0fzmxcyz687nvd97sbc9rsqrxzpq720na47hwh3fr";
 
   nativeBuildInputs = [ cmake python3 llvm.dev ];
   buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
@@ -29,14 +30,15 @@ stdenv.mkDerivation rec {
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ lib.optionals (useLLVM && !haveLibc) [
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
   ] ++ lib.optionals (useLLVM) [
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
-    "-DCMAKE_C_FLAGS=-nodefaultlibs"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -58,7 +60,6 @@ stdenv.mkDerivation rec {
   ]# ++ lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
     ++ lib.optional stdenv.hostPlatform.isAarch32 ./armv7l.patch;
 
-
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
   # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
@@ -89,4 +90,19 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/10/default.nix b/pkgs/development/compilers/llvm/10/default.nix
index e2e78e16d7979..11367d453cde5 100644
--- a/pkgs/development/compilers/llvm/10/default.nix
+++ b/pkgs/development/compilers/llvm/10/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 }:
 
 let
@@ -16,6 +28,12 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "06n1yp638rh24xdxv9v2df0qajxbjz4w59b7dd4ky36drwmpi4yh";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands0 = cc: ''
@@ -29,16 +47,27 @@ let
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
@@ -82,9 +111,13 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
 
     # Below, is the LLVM bootstrapping logic. It handles building a
     # fully LLVM toolchain from scratch. No GCC toolchain should be
@@ -93,14 +126,21 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools-unwrapped = callPackage ./bintools {};
 
-    lldClang = wrapCCWith rec {
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
+
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
@@ -112,17 +152,17 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -133,13 +173,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -149,52 +186,77 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
-      }));
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
+               else stdenv;
+    };
+
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt = if stdenv.hostPlatform.isAndroid
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
-
-    libcxxabi = callPackage ./libc++abi ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/10/libc++/default.nix b/pkgs/development/compilers/llvm/10/libcxx/default.nix
index 1e5dc5b2dacc0..7c01e73171164 100644
--- a/pkgs/development/compilers/llvm/10/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/10/libcxx/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "0v78bfr6h2zifvdqnj2wlfk4pvxzrqn3hg1v6lqk3y12bx9p9xny";
@@ -17,7 +17,9 @@ stdenv.mkDerivation {
 
   patches = [
     ./gnu-install-dirs.patch
-  ] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   preConfigure = ''
     # Get headers from the cxxabi source so we can see private headers not installed by the cxxabi package
@@ -47,10 +49,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.all;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/10/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/10/libcxx/gnu-install-dirs.patch
index 4b031e90bdd55..4b031e90bdd55 100644
--- a/pkgs/development/compilers/llvm/10/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/10/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/10/libc++abi/default.nix b/pkgs/development/compilers/llvm/10/libcxxabi/default.nix
index bc5e77b739d7e..b427949a84267 100644
--- a/pkgs/development/compilers/llvm/10/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/10/libcxxabi/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "0yqs722y76cwvmfsq0lb917r9m3fci7bf5z3yzl71yz9n88ghzm9";
@@ -63,11 +63,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.all;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/10/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/10/libcxxabi/gnu-install-dirs.patch
index 0f80ade7c389d..0f80ade7c389d 100644
--- a/pkgs/development/compilers/llvm/10/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/10/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/10/libc++abi/no-threads.patch b/pkgs/development/compilers/llvm/10/libcxxabi/no-threads.patch
index 787f3e16500e2..787f3e16500e2 100644
--- a/pkgs/development/compilers/llvm/10/libc++abi/no-threads.patch
+++ b/pkgs/development/compilers/llvm/10/libcxxabi/no-threads.patch
diff --git a/pkgs/development/compilers/llvm/10/libc++abi/wasm.patch b/pkgs/development/compilers/llvm/10/libcxxabi/wasm.patch
index 4ebfe46aa813d..4ebfe46aa813d 100644
--- a/pkgs/development/compilers/llvm/10/libc++abi/wasm.patch
+++ b/pkgs/development/compilers/llvm/10/libcxxabi/wasm.patch
diff --git a/pkgs/development/compilers/llvm/10/libunwind/default.nix b/pkgs/development/compilers/llvm/10/libunwind/default.nix
index d010deb661861..8124cf0821e03 100644
--- a/pkgs/development/compilers/llvm/10/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/10/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, fetchpatch
+{ lib, stdenv, llvm_meta, version, fetch, cmake, fetchpatch
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
@@ -17,4 +17,16 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
 }
diff --git a/pkgs/development/compilers/llvm/10/lld/default.nix b/pkgs/development/compilers/llvm/10/lld/default.nix
index 03a48f02a0c1e..5d590aec35acb 100644
--- a/pkgs/development/compilers/llvm/10/lld/default.nix
+++ b/pkgs/development/compilers/llvm/10/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -28,10 +28,16 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS), and
+      WebAssembly in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/10/lldb/default.nix b/pkgs/development/compilers/llvm/10/lldb/default.nix
index ccca340b3e235..04b9e06e77a3d 100644
--- a/pkgs/development/compilers/llvm/10/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/10/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , cmake
 , zlib
@@ -76,11 +76,15 @@ stdenv.mkDerivation (rec {
     ln -s $out/bin/llvm-vscode $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://lldb.llvm.org";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "lldb-manpages";
@@ -104,5 +108,7 @@ stdenv.mkDerivation (rec {
 
   doCheck = false;
 
-  meta.description = "man pages for LLDB ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLDB ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/10/llvm/default.nix b/pkgs/development/compilers/llvm/10/llvm/default.nix
index 22ed308486db0..93cdc7307daa6 100644
--- a/pkgs/development/compilers/llvm/10/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/10/llvm/default.nix
@@ -1,6 +1,7 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
+, fetchpatch
 , cmake
 , python3
 , libffi
@@ -57,6 +58,13 @@ in stdenv.mkDerivation (rec {
 
   patches = [
     ./gnu-install-dirs.patch
+    # On older CPUs (e.g. Hydra/wendy) we'd be getting an error in this test.
+    (fetchpatch {
+      name = "uops-CMOV16rm-noreg.diff";
+      url = "https://github.com/llvm/llvm-project/commit/9e9f991ac033.diff";
+      sha256 = "sha256:12s8vr6ibri8b48h2z38f3afhwam10arfiqfy4yg37bmc054p5hi";
+      stripLen = 1;
+    })
   ] ++ lib.optional enablePolly ./gnu-install-dirs-polly.patch;
 
   postPatch = optionalString stdenv.isDarwin ''
@@ -172,12 +180,23 @@ in stdenv.mkDerivation (rec {
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -199,5 +218,7 @@ in stdenv.mkDerivation (rec {
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/10/openmp.nix b/pkgs/development/compilers/llvm/10/openmp.nix
deleted file mode 100644
index 2946c51fafe21..0000000000000
--- a/pkgs/development/compilers/llvm/10/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation rec {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch pname "0i4bn84lkpm5w3qkpvwm5z6jdj8fynp7d3bcasa1xyq4is6757yi";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/10/openmp/default.nix b/pkgs/development/compilers/llvm/10/openmp/default.nix
new file mode 100644
index 0000000000000..a1b04c7c66b25
--- /dev/null
+++ b/pkgs/development/compilers/llvm/10/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch pname "0i4bn84lkpm5w3qkpvwm5z6jdj8fynp7d3bcasa1xyq4is6757yi";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/11/bintools.nix b/pkgs/development/compilers/llvm/11/bintools/default.nix
index 53f7941e33699..53f7941e33699 100644
--- a/pkgs/development/compilers/llvm/11/bintools.nix
+++ b/pkgs/development/compilers/llvm/11/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/11/clang/default.nix b/pkgs/development/compilers/llvm/11/clang/default.nix
index 3b7accffbca82..f23394a8b754b 100644
--- a/pkgs/development/compilers/llvm/11/clang/default.nix
+++ b/pkgs/development/compilers/llvm/11/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, fetchpatch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -45,6 +45,18 @@ let
       ./purity.patch
       # https://reviews.llvm.org/D51899
       ./gnu-install-dirs.patch
+      # Revert: [Driver] Default to -fno-common for all targets
+      # https://reviews.llvm.org/D75056
+      #
+      # Maintains compatibility with packages that haven't been fixed yet, and
+      # matches gcc10's configuration in nixpkgs.
+      (fetchpatch {
+        revert = true;
+        url = "https://github.com/llvm/llvm-project/commit/0a9fc9233e172601e26381810d093e02ef410f65.diff";
+        stripLen = 1;
+        excludes = [ "docs/*" "test/*" ];
+        sha256 = "0gxgmi0qbm89mq911dahallhi8m6wa9vpklklqmxafx4rplrr8ph";
+      })
     ];
 
     postPatch = ''
@@ -95,11 +107,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -118,6 +139,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/11/compiler-rt/default.nix b/pkgs/development/compilers/llvm/11/compiler-rt/default.nix
index 257bc34092fe2..65b024e8cc320 100644
--- a/pkgs/development/compilers/llvm/11/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/11/compiler-rt/default.nix
@@ -1,20 +1,21 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
+  isNewDarwinBootstrap = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
-stdenv.mkDerivation rec {
-  pname = "compiler-rt";
+stdenv.mkDerivation {
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
-  src = fetch pname "0x1j8ngf1zj63wlnns9vlibafq48qcm72p4jpaxkmkb4qw0grwfy";
+  src = fetch "compiler-rt" "0x1j8ngf1zj63wlnns9vlibafq48qcm72p4jpaxkmkb4qw0grwfy";
 
   nativeBuildInputs = [ cmake python3 llvm.dev ];
-  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
 
   NIX_CFLAGS_COMPILE = [
     "-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"
@@ -24,19 +25,20 @@ stdenv.mkDerivation rec {
     "-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
     "-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
     "-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
-  ] ++ lib.optionals (useLLVM || bareMetal || isMusl) [
+  ] ++ lib.optionals (useLLVM || bareMetal || isMusl || isNewDarwinBootstrap) [
     "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals (!haveLibc || bareMetal) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
-  ] ++ lib.optionals (useLLVM) [
-    "-DCOMPILER_RT_BUILD_BUILTINS=ON"
+  ] ++ lib.optionals (!haveLibc) [
     "-DCMAKE_C_FLAGS=-nodefaultlibs"
+  ] ++ lib.optionals (useLLVM || isNewDarwinBootstrap) [
+    "-DCOMPILER_RT_BUILD_BUILTINS=ON"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -60,6 +62,10 @@ stdenv.mkDerivation rec {
     ++ lib.optional stdenv.hostPlatform.isAarch32 ./armv7l.patch;
 
 
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    cmakeFlagsArray+=("-DCMAKE_LIPO=$(command -v ${stdenv.cc.targetPrefix}lipo)")
+  '';
+
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
   # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
@@ -70,7 +76,7 @@ stdenv.mkDerivation rec {
       --replace 'set(X86 i386)' 'set(X86 i386 i486 i586 i686)'
   '' + lib.optionalString stdenv.isDarwin ''
     substituteInPlace cmake/builtin-config-ix.cmake \
-      --replace 'set(ARM64 arm64 arm64e)' 'set(ARM64)'
+      --replace 'foreach(arch ''${ARM64})' 'foreach(arch)'
     substituteInPlace cmake/config-ix.cmake \
       --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
   '' + lib.optionalString (useLLVM) ''
@@ -92,4 +98,19 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/11/default.nix b/pkgs/development/compilers/llvm/11/default.nix
index 69c6564babe75..3c6d767561ee9 100644
--- a/pkgs/development/compilers/llvm/11/default.nix
+++ b/pkgs/development/compilers/llvm/11/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 }:
 
 let
@@ -18,6 +30,12 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "18n1w1hkv931xzq02b34wglbv6zd6sd0r5kb8piwvag7klj7qw3n";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands0 = cc: ''
@@ -31,16 +49,27 @@ let
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
@@ -83,9 +112,13 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
 
     # Below, is the LLVM bootstrapping logic. It handles building a
     # fully LLVM toolchain from scratch. No GCC toolchain should be
@@ -94,14 +127,21 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools-unwrapped = callPackage ./bintools {};
 
-    lldClang = wrapCCWith rec {
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
+
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
@@ -113,17 +153,17 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -134,13 +174,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -150,52 +187,77 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
-      }));
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if (stdenv.hostPlatform.useLLVM or false) || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if (stdenv.hostPlatform.useLLVM or false) || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
+               else stdenv;
+    };
+
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt = if stdenv.hostPlatform.isAndroid || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
-
-    libcxxabi = callPackage ./libc++abi ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if (stdenv.hostPlatform.useLLVM or false) || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if (stdenv.hostPlatform.useLLVM or false) || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
+      stdenv = if (stdenv.hostPlatform.useLLVM or false) || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/11/libc++/default.nix b/pkgs/development/compilers/llvm/11/libcxx/default.nix
index e095350cea773..596d7f9976bbd 100644
--- a/pkgs/development/compilers/llvm/11/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/11/libcxx/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, fetch, fetchpatch, cmake, python3, libcxxabi, llvm, fixDarwinDylibNames, version
+{ lib, stdenv, llvm_meta, fetch, fetchpatch, cmake, python3, libcxxabi, llvm, fixDarwinDylibNames, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "1rgqsqpgi0vkga5d7hy0iyfsqgzfz7q1xy7afdfa1snp1qjks8xv";
@@ -25,7 +25,9 @@ stdenv.mkDerivation {
       stripLen = 1;
     })
     ./gnu-install-dirs.patch
-  ] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   preConfigure = lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
@@ -44,16 +46,34 @@ stdenv.mkDerivation {
       "-DLIBCXX_ENABLE_THREADS=OFF"
       "-DLIBCXX_ENABLE_FILESYSTEM=OFF"
       "-DLIBCXX_ENABLE_EXCEPTIONS=OFF"
-    ] ++ lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
+    ] ++ lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF"
+
+    # TODO: this is a bit of a hack to cross compile to Apple Silicon.  libcxx
+    # starting with 11 enables CMAKE_BUILD_WITH_INSTALL_NAME_DIR which requires
+    # platform setup for rpaths. In cmake, this is enabled when macos is newer
+    # than 10.5. However CMAKE_SYSTEM_VERSION is set to empty (TODO: why?)
+    # which prevents the conditional configuration, and configure fails.  The
+    # value here corresponds to `uname -r`. If stdenv.hostPlatform.release is
+    # not null, then this property will be set via mkDerivation (TODO: how can
+    # we set this?).
+    ++ lib.optional (
+      stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 &&
+      stdenv.hostPlatform != stdenv.buildPlatform
+    ) "-DCMAKE_SYSTEM_VERSION=20.1.0";
 
   passthru = {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.all;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/11/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/11/libcxx/gnu-install-dirs.patch
index 2b95d6a85d8fe..2b95d6a85d8fe 100644
--- a/pkgs/development/compilers/llvm/11/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/11/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/11/libc++abi/default.nix b/pkgs/development/compilers/llvm/11/libcxxabi/default.nix
index a79a0d2f07ad8..65e0139a59106 100644
--- a/pkgs/development/compilers/llvm/11/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/11/libcxxabi/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "1azcf31mxw59hb1x17xncnm3dyw90ylh8rqx462lvypqh3nr6c8l";
@@ -48,7 +48,7 @@ stdenv.mkDerivation {
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
         # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
-        install_name_tool -id $out/$file $file
+        ${stdenv.cc.targetPrefix}install_name_tool -id $out/$file $file
       done
       make install
       install -d 755 $out/include
@@ -64,11 +64,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.all;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/11/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/11/libcxxabi/gnu-install-dirs.patch
index 10651c1255ef6..10651c1255ef6 100644
--- a/pkgs/development/compilers/llvm/11/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/11/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/11/libc++abi/no-threads.patch b/pkgs/development/compilers/llvm/11/libcxxabi/no-threads.patch
index 787f3e16500e2..787f3e16500e2 100644
--- a/pkgs/development/compilers/llvm/11/libc++abi/no-threads.patch
+++ b/pkgs/development/compilers/llvm/11/libcxxabi/no-threads.patch
diff --git a/pkgs/development/compilers/llvm/11/libc++abi/wasm.patch b/pkgs/development/compilers/llvm/11/libcxxabi/wasm.patch
index 4ebfe46aa813d..4ebfe46aa813d 100644
--- a/pkgs/development/compilers/llvm/11/libc++abi/wasm.patch
+++ b/pkgs/development/compilers/llvm/11/libcxxabi/wasm.patch
diff --git a/pkgs/development/compilers/llvm/11/libunwind/default.nix b/pkgs/development/compilers/llvm/11/libunwind/default.nix
index 6b095f4feae88..462d63283baf8 100644
--- a/pkgs/development/compilers/llvm/11/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/11/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, fetchpatch
+{ lib, stdenv, llvm_meta, version, fetch, cmake, fetchpatch
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
@@ -17,4 +17,16 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
 }
diff --git a/pkgs/development/compilers/llvm/11/lld/default.nix b/pkgs/development/compilers/llvm/11/lld/default.nix
index 3ee5ba6e5a673..d344d3d3c1174 100644
--- a/pkgs/development/compilers/llvm/11/lld/default.nix
+++ b/pkgs/development/compilers/llvm/11/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -28,10 +28,16 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS), and
+      WebAssembly in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/11/lldb/default.nix b/pkgs/development/compilers/llvm/11/lldb/default.nix
index 2979a46a6ccd9..785ac4671ef52 100644
--- a/pkgs/development/compilers/llvm/11/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/11/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , cmake
 , zlib
@@ -76,11 +76,15 @@ stdenv.mkDerivation (rec {
     ln -s $out/bin/llvm-vscode $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://lldb.llvm.org";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "lldb-manpages";
@@ -104,5 +108,7 @@ stdenv.mkDerivation (rec {
 
   doCheck = false;
 
-  meta.description = "man pages for LLDB ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLDB ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/11/llvm/default.nix b/pkgs/development/compilers/llvm/11/llvm/default.nix
index c8033b585cb16..941a85e6ad0de 100644
--- a/pkgs/development/compilers/llvm/11/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/11/llvm/default.nix
@@ -1,6 +1,7 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
+, fetchpatch
 , cmake
 , python3
 , libffi
@@ -57,6 +58,13 @@ in stdenv.mkDerivation (rec {
 
   patches = [
     ./gnu-install-dirs.patch
+    # On older CPUs (e.g. Hydra/wendy) we'd be getting an error in this test.
+    (fetchpatch {
+      name = "uops-CMOV16rm-noreg.diff";
+      url = "https://github.com/llvm/llvm-project/commit/9e9f991ac033.diff";
+      sha256 = "sha256:12s8vr6ibri8b48h2z38f3afhwam10arfiqfy4yg37bmc054p5hi";
+      stripLen = 1;
+    })
   ] ++ lib.optional enablePolly ./gnu-install-dirs-polly.patch;
 
   postPatch = optionalString stdenv.isDarwin ''
@@ -174,12 +182,23 @@ in stdenv.mkDerivation (rec {
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -201,5 +220,7 @@ in stdenv.mkDerivation (rec {
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/11/openmp.nix b/pkgs/development/compilers/llvm/11/openmp.nix
deleted file mode 100644
index c99358cd28780..0000000000000
--- a/pkgs/development/compilers/llvm/11/openmp.nix
+++ /dev/null
@@ -1,35 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, fetchpatch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation rec {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch pname "0bh5cswgpc79awlq8j5i7hp355adaac7s6zaz0zwp6mkflxli1yi";
-
-  patches = [
-    # Fix compilation on aarch64-darwin, remove after the next release.
-    (fetchpatch {
-      url = "https://github.com/llvm/llvm-project/commit/7b5254223acbf2ef9cd278070c5a84ab278d7e5f.patch";
-      sha256 = "sha256-A+9/IVIoazu68FK5H5CiXcOEYe1Hpp4xTx2mIw7m8Es=";
-      stripLen = 1;
-    })
-  ];
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/11/openmp/default.nix b/pkgs/development/compilers/llvm/11/openmp/default.nix
new file mode 100644
index 0000000000000..330560a677dcf
--- /dev/null
+++ b/pkgs/development/compilers/llvm/11/openmp/default.nix
@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, fetchpatch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch pname "0bh5cswgpc79awlq8j5i7hp355adaac7s6zaz0zwp6mkflxli1yi";
+
+  patches = [
+    # Fix compilation on aarch64-darwin, remove after the next release.
+    (fetchpatch {
+      url = "https://github.com/llvm/llvm-project/commit/7b5254223acbf2ef9cd278070c5a84ab278d7e5f.patch";
+      sha256 = "sha256-A+9/IVIoazu68FK5H5CiXcOEYe1Hpp4xTx2mIw7m8Es=";
+      stripLen = 1;
+    })
+  ];
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/12/compiler-rt/default.nix b/pkgs/development/compilers/llvm/12/compiler-rt/default.nix
index b880a0071b9e1..895af8f2f020d 100644
--- a/pkgs/development/compilers/llvm/12/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/12/compiler-rt/default.nix
@@ -4,14 +4,15 @@ let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
-stdenv.mkDerivation rec {
-  pname = "compiler-rt";
+stdenv.mkDerivation {
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
-  src = fetch pname "0d444qihq9jhqnfv003cr704v363va72zl6qaw2algj1c85cva45";
+  src = fetch "compiler-rt" "0d444qihq9jhqnfv003cr704v363va72zl6qaw2algj1c85cva45";
 
   nativeBuildInputs = [ cmake python3 llvm.dev ];
   buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
@@ -29,14 +30,15 @@ stdenv.mkDerivation rec {
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ lib.optionals (useLLVM && !haveLibc) [
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
   ] ++ lib.optionals (useLLVM) [
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
-    "-DCMAKE_C_FLAGS=-nodefaultlibs"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -59,7 +61,6 @@ stdenv.mkDerivation rec {
   ]# ++ lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
     ++ lib.optional stdenv.hostPlatform.isAarch32 ./armv7l.patch;
 
-
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
   # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
diff --git a/pkgs/development/compilers/llvm/12/default.nix b/pkgs/development/compilers/llvm/12/default.nix
index ea054107e0562..35228eac43beb 100644
--- a/pkgs/development/compilers/llvm/12/default.nix
+++ b/pkgs/development/compilers/llvm/12/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 , darwin
 }:
 
@@ -38,6 +50,15 @@ let
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
     libllvm = callPackage ./llvm {
@@ -95,7 +116,7 @@ let
 
     lld = callPackage ./lld {
       inherit llvm_meta;
-      libunwind = libraries.libunwind;
+      inherit (libraries) libunwind;
     };
 
     lldb = callPackage ./lldb {
@@ -112,14 +133,21 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools {};
+    bintools-unwrapped = callPackage ./bintools {};
+
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
 
-    lldClang = wrapCCWith rec {
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
@@ -131,17 +159,17 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -152,13 +180,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -168,52 +193,78 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt ({ inherit llvm_meta; } //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
-      }));
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
+               else stdenv;
+    };
+
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt = if stdenv.hostPlatform.isAndroid
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libcxx ({ inherit llvm_meta; } //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
-
-    libcxxabi = callPackage ./libcxxabi ({ inherit llvm_meta; } //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp { inherit llvm_meta; };
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({ inherit llvm_meta; } //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
+      inherit (buildLlvmTools) llvm;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/12/libcxx/default.nix b/pkgs/development/compilers/llvm/12/libcxx/default.nix
index 7b3b26b959e46..1c9a7dd3c53bf 100644
--- a/pkgs/development/compilers/llvm/12/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/12/libcxx/default.nix
@@ -15,7 +15,13 @@ stdenv.mkDerivation {
     mv llvm-* llvm
   '';
 
-  patches = lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  outputs = [ "out" "dev" ];
+
+  patches = [
+    ./gnu-install-dirs.patch
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   preConfigure = lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
diff --git a/pkgs/development/compilers/llvm/12/libcxx/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/12/libcxx/gnu-install-dirs.patch
new file mode 100644
index 0000000000000..1f9de00a9d56f
--- /dev/null
+++ b/pkgs/development/compilers/llvm/12/libcxx/gnu-install-dirs.patch
@@ -0,0 +1,100 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9bf1a02f0908..612cd4aab76c 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -28,6 +28,8 @@ set(LIBCXX_BINARY_INCLUDE_DIR "${LIBCXX_BINARY_DIR}/include/c++build")
+ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXX_STANDALONE_BUILD)
+   project(libcxx CXX C)
+ 
++  include(GNUInstallDirs)
++
+   set(PACKAGE_NAME libcxx)
+   set(PACKAGE_VERSION 12.0.0)
+   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
+@@ -402,7 +404,7 @@ endif ()
+ if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
+   set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+   set(LIBCXX_HEADER_DIR ${LLVM_BINARY_DIR})
+-  set(LIBCXX_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
++  set(LIBCXX_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+   if(LIBCXX_LIBDIR_SUBDIR)
+     string(APPEND LIBCXX_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
+     string(APPEND LIBCXX_INSTALL_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
+@@ -410,11 +412,11 @@ if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
+ elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
+   set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+   set(LIBCXX_HEADER_DIR  ${LLVM_BINARY_DIR})
+-  set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX})
++  set(LIBCXX_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBCXX_LIBDIR_SUFFIX})
+ else()
+   set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
+   set(LIBCXX_HEADER_DIR  ${CMAKE_BINARY_DIR})
+-  set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX})
++  set(LIBCXX_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBCXX_LIBDIR_SUFFIX})
+ endif()
+ 
+ file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}")
+diff --git a/cmake/Modules/HandleLibCXXABI.cmake b/cmake/Modules/HandleLibCXXABI.cmake
+index 5d2764e870e9..bb1ec5de6ca2 100644
+--- a/cmake/Modules/HandleLibCXXABI.cmake
++++ b/cmake/Modules/HandleLibCXXABI.cmake
+@@ -63,7 +63,7 @@ macro(setup_abi_lib abidefines abishared abistatic abifiles abidirs)
+ 
+         if (LIBCXX_INSTALL_HEADERS)
+           install(FILES "${LIBCXX_BINARY_INCLUDE_DIR}/${fpath}"
+-            DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dstdir}
++            DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1/${dstdir}
+             COMPONENT cxx-headers
+             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+             )
+diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
+index 29a317b8ae9a..4747263cfd1b 100644
+--- a/include/CMakeLists.txt
++++ b/include/CMakeLists.txt
+@@ -252,7 +252,7 @@ if (LIBCXX_INSTALL_HEADERS)
+   foreach(file ${files})
+     get_filename_component(dir ${file} DIRECTORY)
+     install(FILES ${file}
+-      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dir}
++      DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1/${dir}
+       COMPONENT cxx-headers
+       PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+     )
+@@ -260,7 +260,7 @@ if (LIBCXX_INSTALL_HEADERS)
+ 
+   # Install the generated header as __config.
+   install(FILES ${LIBCXX_BINARY_DIR}/__generated_config
+-    DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1
++    DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}${CMAKE_INSTALL_INCLUDEDIR}/c++/v1
+     PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+     RENAME __config
+     COMPONENT cxx-headers)
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 9965104cb5b2..9b55dbb1d822 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -352,21 +352,21 @@ if (LIBCXX_INSTALL_SHARED_LIBRARY)
+   install(TARGETS cxx_shared
+     ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+     LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+-    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
++    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_BINDIR} COMPONENT cxx)
+ endif()
+ 
+ if (LIBCXX_INSTALL_STATIC_LIBRARY)
+   install(TARGETS cxx_static
+     ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+     LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+-    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
++    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_BINDIR} COMPONENT cxx)
+ endif()
+ 
+ if(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY)
+   install(TARGETS cxx_experimental
+     LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+     ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+-    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
++    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}${CMAKE_INSTALL_BINDIR} COMPONENT cxx)
+ endif()
+ 
+ # NOTE: This install command must go after the cxx install command otherwise
diff --git a/pkgs/development/compilers/llvm/12/libcxxabi/default.nix b/pkgs/development/compilers/llvm/12/libcxxabi/default.nix
index 7c97426243806..e360cf8d0b2f1 100644
--- a/pkgs/development/compilers/llvm/12/libcxxabi/default.nix
+++ b/pkgs/development/compilers/llvm/12/libcxxabi/default.nix
@@ -8,18 +8,7 @@ stdenv.mkDerivation {
 
   src = fetch "libcxxabi" "1cbmzspwjlr8f6sp73pw6ivf4dpg6rpc61by0q1m2zca2k6yif3a";
 
-  nativeBuildInputs = [ cmake python3 ];
-  buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
-
-  cmakeFlags = lib.optionals (stdenv.hostPlatform.useLLVM or false) [
-    "-DLLVM_ENABLE_LIBCXX=ON"
-    "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
-  ] ++ lib.optionals stdenv.hostPlatform.isWasm [
-    "-DLIBCXXABI_ENABLE_THREADS=OFF"
-    "-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
-  ] ++ lib.optionals (!enableShared) [
-    "-DLIBCXXABI_ENABLE_SHARED=OFF"
-  ];
+  outputs = [ "out" "dev" ];
 
   postUnpack = ''
     unpackFile ${libcxx.src}
@@ -34,6 +23,23 @@ stdenv.mkDerivation {
     patch -p1 -d llvm -i ${./wasm.patch}
   '';
 
+  patches = [
+    ./gnu-install-dirs.patch
+  ];
+
+  nativeBuildInputs = [ cmake python3 ];
+  buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
+
+  cmakeFlags = lib.optionals (stdenv.hostPlatform.useLLVM or false) [
+    "-DLLVM_ENABLE_LIBCXX=ON"
+    "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
+  ] ++ lib.optionals stdenv.hostPlatform.isWasm [
+    "-DLIBCXXABI_ENABLE_THREADS=OFF"
+    "-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
+  ] ++ lib.optionals (!enableShared) [
+    "-DLIBCXXABI_ENABLE_SHARED=OFF"
+  ];
+
   installPhase = if stdenv.isDarwin
     then ''
       for file in lib/*.dylib; do
diff --git a/pkgs/development/compilers/llvm/12/libcxxabi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/12/libcxxabi/gnu-install-dirs.patch
new file mode 100644
index 0000000000000..b49b1685940f8
--- /dev/null
+++ b/pkgs/development/compilers/llvm/12/libcxxabi/gnu-install-dirs.patch
@@ -0,0 +1,34 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 426c855288fc..a9812a994f53 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -27,6 +27,8 @@ set(LIBCXXABI_LIBCXX_PATH "${CMAKE_CURRENT_LIST_DIR}/../libcxx" CACHE PATH
+ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXXABI_STANDALONE_BUILD)
+   project(libcxxabi CXX C)
+ 
++  include(GNUInstallDirs)
++
+   set(PACKAGE_NAME libcxxabi)
+   set(PACKAGE_VERSION 11.0.0)
+   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
+@@ -180,17 +182,17 @@ set(CMAKE_MODULE_PATH
+ 
+ if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
+   set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
++  set(LIBCXXABI_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+   if(LIBCXX_LIBDIR_SUBDIR)
+     string(APPEND LIBCXXABI_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
+     string(APPEND LIBCXXABI_INSTALL_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
+   endif()
+ elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
+   set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
++  set(LIBCXXABI_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBCXXABI_LIBDIR_SUFFIX})
+ else()
+   set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX})
+-  set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
++  set(LIBCXXABI_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBCXXABI_LIBDIR_SUFFIX})
+ endif()
+ 
+ set(LIBCXXABI_INSTALL_PREFIX "" CACHE STRING "Define libc++abi destination prefix.")
diff --git a/pkgs/development/compilers/llvm/12/lld/default.nix b/pkgs/development/compilers/llvm/12/lld/default.nix
index d46f25b68b319..e2c7470d2fc5a 100644
--- a/pkgs/development/compilers/llvm/12/lld/default.nix
+++ b/pkgs/development/compilers/llvm/12/lld/default.nix
@@ -18,6 +18,13 @@ stdenv.mkDerivation rec {
     ./gnu-install-dirs.patch
   ];
 
+  postPatch = ''
+    substituteInPlace MachO/CMakeLists.txt --replace \
+      '(''${LLVM_MAIN_SRC_DIR}/' '('
+    mkdir -p libunwind/include
+    tar -xf "${libunwind.src}" --wildcards -C libunwind/include --strip-components=2 "libunwind-*/include/"
+  '';
+
   nativeBuildInputs = [ cmake ];
   buildInputs = [ libllvm libxml2 ];
 
@@ -29,13 +36,6 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" "dev" ];
 
-  postPatch = ''
-    substituteInPlace MachO/CMakeLists.txt --replace \
-      '(''${LLVM_MAIN_SRC_DIR}/' '('
-    mkdir -p libunwind/include
-    tar -xf "${libunwind.src}" --wildcards -C libunwind/include --strip-components=2 "libunwind-*/include/"
-  '';
-
   meta = llvm_meta // {
     homepage = "https://lld.llvm.org/";
     description = "The LLVM linker";
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
       LLD is a linker from the LLVM project that is a drop-in replacement for
       system linkers and runs much faster than them. It also provides features
       that are useful for toolchain developers.
-      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS) and
+      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS), and
       WebAssembly in descending order of completeness. Internally, LLD consists
       of several different linkers.
     '';
diff --git a/pkgs/development/compilers/llvm/12/llvm/default.nix b/pkgs/development/compilers/llvm/12/llvm/default.nix
index 0bc704a815590..d2365745b9823 100644
--- a/pkgs/development/compilers/llvm/12/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/12/llvm/default.nix
@@ -1,6 +1,7 @@
 { lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
+, fetchpatch
 , cmake
 , python3
 , libffi
@@ -56,10 +57,14 @@ in stdenv.mkDerivation (rec {
   propagatedBuildInputs = [ ncurses zlib ];
 
   patches = [
-    # Force a test to evaluate the saved benchmark for a CPU for which LLVM has
-    # an execution model. See NixOS/nixpkgs#119673.
-    ../../exegesis-force-bdver2.patch
     ./gnu-install-dirs.patch
+    # On older CPUs (e.g. Hydra/wendy) we'd be getting an error in this test.
+    (fetchpatch {
+      name = "uops-CMOV16rm-noreg.diff";
+      url = "https://github.com/llvm/llvm-project/commit/9e9f991ac033.diff";
+      sha256 = "sha256:12s8vr6ibri8b48h2z38f3afhwam10arfiqfy4yg37bmc054p5hi";
+      stripLen = 1;
+    })
   ] ++ lib.optional enablePolly ./gnu-install-dirs-polly.patch;
 
   postPatch = optionalString stdenv.isDarwin ''
@@ -205,6 +210,8 @@ in stdenv.mkDerivation (rec {
     make docs-llvm-man
   '';
 
+  propagatedBuildInputs = [];
+
   installPhase = ''
     make -C docs install
   '';
diff --git a/pkgs/development/compilers/llvm/5/clang/default.nix b/pkgs/development/compilers/llvm/5/clang/default.nix
index bbeb9277683d3..b5887a23c65ec 100644
--- a/pkgs/development/compilers/llvm/5/clang/default.nix
+++ b/pkgs/development/compilers/llvm/5/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -88,11 +88,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -111,6 +120,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/5/compiler-rt/default.nix b/pkgs/development/compilers/llvm/5/compiler-rt/default.nix
index 7e85c420da03e..a14823571e17b 100644
--- a/pkgs/development/compilers/llvm/5/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/5/compiler-rt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
@@ -86,4 +86,19 @@ stdenv.mkDerivation {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/linux/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/5/default.nix b/pkgs/development/compilers/llvm/5/default.nix
index c416964b22a3b..d11c08329d54a 100644
--- a/pkgs/development/compilers/llvm/5/default.nix
+++ b/pkgs/development/compilers/llvm/5/default.nix
@@ -16,30 +16,41 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "018b3fiwah8f8br5i26qmzh6sjvzchpn358sn8v079m49f2jldm3";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
     '';
 
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
-    libllvm-polly = callPackage ./llvm { enablePolly = true; };
+    libllvm-polly = callPackage ./llvm {
+      inherit llvm_meta;
+      enablePolly = true;
+    };
 
     llvm-polly = tools.libllvm-polly.lib // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
@@ -76,26 +87,38 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt {};
+    compiler-rt = callPackage ./compiler-rt {
+      inherit llvm_meta;
+    };
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ {};
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+    };
 
-    libcxxabi = callPackage ./libc++abi {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/5/libc++/default.nix b/pkgs/development/compilers/llvm/5/libcxx/default.nix
index 77421b4e6d8dc..44026fba187b7 100644
--- a/pkgs/development/compilers/llvm/5/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/5/libcxx/default.nix
@@ -1,7 +1,7 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "1672aaf95fgy4xsfra8pw24f6r93zwzpan1033hkcm8p2glqipvf";
@@ -45,10 +45,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.unix;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/5/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/5/libcxx/gnu-install-dirs.patch
index d9ea0dc7dfd0e..d9ea0dc7dfd0e 100644
--- a/pkgs/development/compilers/llvm/5/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/5/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/5/libc++abi/default.nix b/pkgs/development/compilers/llvm/5/libcxxabi/default.nix
index 8bc3b9e2977b6..5146e20089b7d 100644
--- a/pkgs/development/compilers/llvm/5/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/5/libcxxabi/default.nix
@@ -1,7 +1,7 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version }:
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "12lp799rskr4fc2xr64qn4jfkjnfd8b1aymvsxyn4k9ar7r9pgqv";
@@ -47,11 +47,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.unix;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/5/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/5/libcxxabi/gnu-install-dirs.patch
index 760d7194f7b9d..760d7194f7b9d 100644
--- a/pkgs/development/compilers/llvm/5/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/5/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/5/lld/default.nix b/pkgs/development/compilers/llvm/5/lld/default.nix
index 73762e2d2e505..7e74e79a15c7e 100644
--- a/pkgs/development/compilers/llvm/5/lld/default.nix
+++ b/pkgs/development/compilers/llvm/5/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -6,7 +6,7 @@
 , version
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "lld";
   inherit version;
 
@@ -27,11 +27,16 @@ stdenv.mkDerivation {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
-    badPlatforms = [ "x86_64-darwin" ];
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), and Mach-O (macOS)
+      in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/5/lldb/default.nix b/pkgs/development/compilers/llvm/5/lldb/default.nix
index 723792d1341c0..951e9c8e1ac6d 100644
--- a/pkgs/development/compilers/llvm/5/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/5/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , fetchpatch
 , cmake
@@ -73,10 +73,14 @@ stdenv.mkDerivation rec {
     cp ../docs/lldb.1 $out/share/man/man1/
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://llvm.org/";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/5/llvm/default.nix b/pkgs/development/compilers/llvm/5/llvm/default.nix
index 0cbd30c783c15..54fd783a7c2de 100644
--- a/pkgs/development/compilers/llvm/5/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/5/llvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
 , fetchpatch
@@ -173,12 +173,23 @@ stdenv.mkDerivation ({
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -197,5 +208,7 @@ stdenv.mkDerivation ({
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/5/openmp.nix b/pkgs/development/compilers/llvm/5/openmp.nix
deleted file mode 100644
index 169c9c50324eb..0000000000000
--- a/pkgs/development/compilers/llvm/5/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch "openmp" "0p2n52676wlq6y9q99n5pivq6pvvda1p994r69fxj206ahn59jir";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/5/openmp/default.nix b/pkgs/development/compilers/llvm/5/openmp/default.nix
new file mode 100644
index 0000000000000..3a1f97919dc33
--- /dev/null
+++ b/pkgs/development/compilers/llvm/5/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch "openmp" "0p2n52676wlq6y9q99n5pivq6pvvda1p994r69fxj206ahn59jir";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/6/clang/default.nix b/pkgs/development/compilers/llvm/6/clang/default.nix
index 5c4894af9da9b..eba9111d9d323 100644
--- a/pkgs/development/compilers/llvm/6/clang/default.nix
+++ b/pkgs/development/compilers/llvm/6/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -88,11 +88,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -111,6 +120,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/6/compiler-rt/default.nix b/pkgs/development/compilers/llvm/6/compiler-rt/default.nix
index 384305f5cf288..0ba96e5375b71 100644
--- a/pkgs/development/compilers/llvm/6/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/6/compiler-rt/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
@@ -88,4 +88,19 @@ stdenv.mkDerivation {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/linux/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/6/default.nix b/pkgs/development/compilers/llvm/6/default.nix
index b78f7a62506d5..a0cc84d8d7337 100644
--- a/pkgs/development/compilers/llvm/6/default.nix
+++ b/pkgs/development/compilers/llvm/6/default.nix
@@ -16,30 +16,41 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "1w8ml7fyn4vyxmy59n2qm4r1k1kgwgwkaldp6m45fdv4g0kkfbhd";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
     '';
 
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
-    libllvm-polly = callPackage ./llvm { enablePolly = true; };
+    libllvm-polly = callPackage ./llvm {
+      inherit llvm_meta;
+      enablePolly = true;
+    };
 
     llvm-polly = tools.libllvm-polly.lib // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
@@ -77,26 +88,38 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt {};
+    compiler-rt = callPackage ./compiler-rt {
+      inherit llvm_meta;
+    };
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ {};
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+    };
 
-    libcxxabi = callPackage ./libc++abi {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/6/libc++/default.nix b/pkgs/development/compilers/llvm/6/libcxx/default.nix
index 69314fbe2ba14..3e39dd840424d 100644
--- a/pkgs/development/compilers/llvm/6/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/6/libcxx/default.nix
@@ -1,7 +1,7 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "0rzw4qvxp6qx4l4h9amrq02gp7hbg8lw4m0sy3k60f50234gnm3n";
@@ -45,10 +45,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.unix;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/6/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/6/libcxx/gnu-install-dirs.patch
index 33ff9ef123a46..33ff9ef123a46 100644
--- a/pkgs/development/compilers/llvm/6/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/6/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/6/libc++abi/default.nix b/pkgs/development/compilers/llvm/6/libcxxabi/default.nix
index 04054f0ba0e75..6a03d8a1835e4 100644
--- a/pkgs/development/compilers/llvm/6/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/6/libcxxabi/default.nix
@@ -1,7 +1,7 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version }:
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "0prqvdj317qrc8nddaq1hh2ag9algkd9wbkj3y4mr5588k12x7r0";
@@ -47,11 +47,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.unix;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/6/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/6/libcxxabi/gnu-install-dirs.patch
index 649d28d6c459e..649d28d6c459e 100644
--- a/pkgs/development/compilers/llvm/6/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/6/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/6/lld/default.nix b/pkgs/development/compilers/llvm/6/lld/default.nix
index 5bfd5f60e92ff..83b1991f453ca 100644
--- a/pkgs/development/compilers/llvm/6/lld/default.nix
+++ b/pkgs/development/compilers/llvm/6/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -7,11 +7,11 @@
 , version
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "lld";
   inherit version;
 
-  src = fetch "lld" "04afcfq2h7ysyqxxhyhb7ig4p0vdw7mi63kh8mffl74j0rc781p7";
+  src = fetch pname "04afcfq2h7ysyqxxhyhb7ig4p0vdw7mi63kh8mffl74j0rc781p7";
 
   patches = [
     ./gnu-install-dirs.patch
@@ -28,10 +28,16 @@ stdenv.mkDerivation {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), and Mach-O (macOS)
+      in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/6/lldb/default.nix b/pkgs/development/compilers/llvm/6/lldb/default.nix
index 31cc0ca68d71b..da3c4a73a590c 100644
--- a/pkgs/development/compilers/llvm/6/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/6/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , fetchpatch
 , cmake
@@ -73,10 +73,14 @@ stdenv.mkDerivation rec {
     cp ../docs/lldb.1 $out/share/man/man1/
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://llvm.org/";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/6/llvm/default.nix b/pkgs/development/compilers/llvm/6/llvm/default.nix
index 1c04a62c4d539..0907c89561717 100644
--- a/pkgs/development/compilers/llvm/6/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/6/llvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
 , cmake
@@ -167,12 +167,23 @@ stdenv.mkDerivation ({
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -191,5 +202,7 @@ stdenv.mkDerivation ({
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/6/openmp.nix b/pkgs/development/compilers/llvm/6/openmp.nix
deleted file mode 100644
index 9de18065918c9..0000000000000
--- a/pkgs/development/compilers/llvm/6/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch "openmp" "0nhwfba9c351r16zgyjyfwdayr98nairky3c2f0b2lc360mwmbv6";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/6/openmp/default.nix b/pkgs/development/compilers/llvm/6/openmp/default.nix
new file mode 100644
index 0000000000000..bc21220af7c7d
--- /dev/null
+++ b/pkgs/development/compilers/llvm/6/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch "openmp" "0nhwfba9c351r16zgyjyfwdayr98nairky3c2f0b2lc360mwmbv6";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/7/bintools.nix b/pkgs/development/compilers/llvm/7/bintools/default.nix
index 53f7941e33699..53f7941e33699 100644
--- a/pkgs/development/compilers/llvm/7/bintools.nix
+++ b/pkgs/development/compilers/llvm/7/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/7/clang/default.nix b/pkgs/development/compilers/llvm/7/clang/default.nix
index 187602ef361e8..e1b031ad352b1 100644
--- a/pkgs/development/compilers/llvm/7/clang/default.nix
+++ b/pkgs/development/compilers/llvm/7/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -100,11 +100,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -123,6 +132,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/default.nix b/pkgs/development/compilers/llvm/7/compiler-rt/default.nix
index 75d61a51e6010..5f64e2f2a27ea 100644
--- a/pkgs/development/compilers/llvm/7/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/7/compiler-rt/default.nix
@@ -1,15 +1,16 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
 stdenv.mkDerivation {
-  pname = "compiler-rt";
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
   src = fetch "compiler-rt" "1n48p8gjarihkws0i2bay5w9bdwyxyxxbpwyng7ba58jb30dlyq5";
 
@@ -29,14 +30,15 @@ stdenv.mkDerivation {
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ lib.optionals (useLLVM && !haveLibc) [
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
   ] ++ lib.optionals (useLLVM) [
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
-    "-DCMAKE_C_FLAGS=-nodefaultlibs"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -83,10 +85,25 @@ stdenv.mkDerivation {
   postInstall = lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWasm) ''
     ln -s "$out/lib"/*/* "$out/lib"
   '' + lib.optionalString (useLLVM) ''
-    ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/linux/crtbegin.o
-    ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/linux/crtend.o
-    ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/linux/crtbeginS.o
-    ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/linux/crtendS.o
+    ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/crtbegin.o
+    ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
+    ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
+    ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch
index fd7c6a690fade..41b501ec6497d 100644
--- a/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/7/compiler-rt/gnu-install-dirs.patch
@@ -19,7 +19,7 @@ index cd4c704fc824..5abcd1260381 100644
    # Install in Clang resource directory.
    install(FILES ${file_name}
 -    DESTINATION ${COMPILER_RT_INSTALL_PATH}/share
-+    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
++    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_DATADIR}
      COMPONENT ${component})
    add_dependencies(${component} ${target_name})
  
diff --git a/pkgs/development/compilers/llvm/7/default.nix b/pkgs/development/compilers/llvm/7/default.nix
index 7aa3f9099cc99..4057f206caf18 100644
--- a/pkgs/development/compilers/llvm/7/default.nix
+++ b/pkgs/development/compilers/llvm/7/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 }:
 
 let
@@ -16,6 +28,12 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "0lb4kdh7j2fhfz8kd6iv5df7m3pikiryk1vvwsf87spc90n09q0w";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands0 = cc: ''
@@ -26,27 +44,43 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
-    libllvm-polly = callPackage ./llvm { enablePolly = true; };
+    libllvm-polly = callPackage ./llvm {
+      inherit llvm_meta;
+      enablePolly = true;
+    };
 
     llvm-polly = tools.libllvm-polly.lib // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
 
     clang-polly-unwrapped = callPackage ./clang {
+      inherit llvm_meta;
       inherit clang-tools-extra_src;
       libllvm = tools.libllvm-polly;
       enablePolly = true;
@@ -84,9 +118,13 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
 
     # Below, is the LLVM bootstrapping logic. It handles building a
     # fully LLVM toolchain from scratch. No GCC toolchain should be
@@ -95,34 +133,43 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools-unwrapped = callPackage ./bintools {};
 
-    lldClang = wrapCCWith rec {
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
+
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
+      ] ++ lib.optionals (!stdenv.targetPlatform.isWasm) [
+        targetLlvmLibraries.libunwind
       ];
       extraBuildCommands = ''
         echo "-rtlib=compiler-rt -Wno-unused-command-line-argument" >> $out/nix-support/cc-cflags
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -133,13 +180,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -149,53 +193,79 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt {
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
       stdenv = if stdenv.hostPlatform.useLLVM or false
-               then overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
                else stdenv;
     };
 
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt =
+      if stdenv.hostPlatform.isAndroid || (stdenv.hostPlatform != stdenv.buildPlatform && stdenv.hostPlatform.isDarwin)
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
+
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libcxxabi = callPackage ./libc++abi ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
       inherit (buildLlvmTools) llvm;
-    } // lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-      stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-    });
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/7/libc++/default.nix b/pkgs/development/compilers/llvm/7/libcxx/default.nix
index afc59d9117945..ac10e8eb77e34 100644
--- a/pkgs/development/compilers/llvm/7/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/7/libcxx/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "0kmhcapm2cjwalyiqasj9dmqbw59mcwdl8fgl951wg7ax84b8hj4";
@@ -17,7 +17,9 @@ stdenv.mkDerivation {
 
   patches = [
     ./gnu-install-dirs.patch
-  ] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   prePatch = ''
     substituteInPlace lib/CMakeLists.txt --replace "/usr/lib/libc++" "\''${LIBCXX_LIBCXXABI_LIB_PATH}/libc++"
@@ -34,7 +36,7 @@ stdenv.mkDerivation {
     ++ lib.optional stdenv.hostPlatform.isMusl python3
     ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
-  buildInputs = [ libcxxabi ] ;
+  buildInputs = [ libcxxabi ];
 
   cmakeFlags = [
     "-DLIBCXX_LIBCXXABI_LIB_PATH=${libcxxabi}/lib"
@@ -48,10 +50,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.unix;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/7/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch
index 910e5287a866c..910e5287a866c 100644
--- a/pkgs/development/compilers/llvm/7/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/7/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/7/libc++abi/default.nix b/pkgs/development/compilers/llvm/7/libcxxabi/default.nix
index 31ead6eb42158..1663b8c7291da 100644
--- a/pkgs/development/compilers/llvm/7/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/7/libcxxabi/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
 , standalone ? stdenv.hostPlatform.useLLVM or false
 , withLibunwind ? !stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm
   # on musl the shared objects don't build
@@ -6,7 +6,7 @@
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "1zcqxsdjhawgz1cvpk07y3jl6fg9p3ay4nl69zsirqb2ghgyhhb2";
@@ -58,11 +58,15 @@ stdenv.mkDerivation {
       ${lib.optionalString enableShared "ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1"}
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.unix;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/7/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch
index 92d9e94fdee7d..92d9e94fdee7d 100644
--- a/pkgs/development/compilers/llvm/7/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/7/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/7/libunwind/default.nix b/pkgs/development/compilers/llvm/7/libunwind/default.nix
index 14c0abc5153f4..426895029b3eb 100644
--- a/pkgs/development/compilers/llvm/7/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/7/libunwind/default.nix
@@ -1,12 +1,17 @@
-{ lib, stdenv, version, fetch, fetchpatch, cmake, llvm, libcxx
+{ lib, stdenv, llvm_meta, version, fetch, fetchpatch, cmake, llvm
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "libunwind";
   inherit version;
 
-  src = fetch "libunwind" "035dsxs10nyiqd00q07yycvmkjl01yz4jdlrjvmch8klxg4pyjhp";
+  src = fetch pname "035dsxs10nyiqd00q07yycvmkjl01yz4jdlrjvmch8klxg4pyjhp";
+
+  postUnpack = ''
+    unpackFile ${llvm.src}
+    cmakeFlagsArray=($cmakeFlagsArray -DLLVM_PATH=$PWD/$(ls -d llvm-*))
+  '';
 
   patches = [
     ./gnu-install-dirs.patch
@@ -24,12 +29,25 @@ stdenv.mkDerivation {
     })
   ];
 
-  nativeBuildInputs = [ cmake llvm.dev ];
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optionals (!enableShared) [
     "-DLIBUNWIND_ENABLE_SHARED=OFF"
   ] ++ lib.optionals (stdenv.hostPlatform.useLLVM or false) [
-    "-DLIBUNWIND_HAS_NOSTDINCXX_FLAG=ON"
     "-DLLVM_ENABLE_LIBCXX=ON"
   ];
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
 }
diff --git a/pkgs/development/compilers/llvm/7/lld/default.nix b/pkgs/development/compilers/llvm/7/lld/default.nix
index da863d5ad4a47..09a0a68e2572e 100644
--- a/pkgs/development/compilers/llvm/7/lld/default.nix
+++ b/pkgs/development/compilers/llvm/7/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -7,11 +7,11 @@
 , version
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "lld";
   inherit version;
 
-  src = fetch "lld" "0rsqb7zcnij5r5ipfhr129j7skr5n9pyr388kjpqwh091952f3x1";
+  src = fetch pname "0rsqb7zcnij5r5ipfhr129j7skr5n9pyr388kjpqwh091952f3x1";
 
   patches = [
     ./gnu-install-dirs.patch
@@ -28,10 +28,16 @@ stdenv.mkDerivation {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), and Mach-O (macOS)
+      in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/7/lldb/default.nix b/pkgs/development/compilers/llvm/7/lldb/default.nix
index 9788849287968..e2eab31697d7f 100644
--- a/pkgs/development/compilers/llvm/7/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/7/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , cmake
 , zlib
@@ -76,10 +76,14 @@ stdenv.mkDerivation rec {
     cp ../docs/lldb.1 $out/share/man/man1/
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://llvm.org/";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/7/llvm/default.nix b/pkgs/development/compilers/llvm/7/llvm/default.nix
index 6f189779f8481..4a9b4f5182056 100644
--- a/pkgs/development/compilers/llvm/7/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/7/llvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
 , fetchpatch
@@ -184,12 +184,23 @@ in stdenv.mkDerivation ({
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -211,5 +222,7 @@ in stdenv.mkDerivation ({
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/7/openmp.nix b/pkgs/development/compilers/llvm/7/openmp.nix
deleted file mode 100644
index 53f52c326c55b..0000000000000
--- a/pkgs/development/compilers/llvm/7/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch "openmp" "1dg53wzsci2kra8lh1y0chh60h2l8h1by93br5spzvzlxshkmrqy";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/7/openmp/default.nix b/pkgs/development/compilers/llvm/7/openmp/default.nix
new file mode 100644
index 0000000000000..c331762712f2d
--- /dev/null
+++ b/pkgs/development/compilers/llvm/7/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch "openmp" "1dg53wzsci2kra8lh1y0chh60h2l8h1by93br5spzvzlxshkmrqy";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/8/bintools.nix b/pkgs/development/compilers/llvm/8/bintools/default.nix
index 53f7941e33699..53f7941e33699 100644
--- a/pkgs/development/compilers/llvm/8/bintools.nix
+++ b/pkgs/development/compilers/llvm/8/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/8/clang/default.nix b/pkgs/development/compilers/llvm/8/clang/default.nix
index c82b3e873e8c0..c3399dccd1d77 100644
--- a/pkgs/development/compilers/llvm/8/clang/default.nix
+++ b/pkgs/development/compilers/llvm/8/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -107,11 +107,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -130,6 +139,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/8/compiler-rt/default.nix b/pkgs/development/compilers/llvm/8/compiler-rt/default.nix
index d370de031bb5b..d6d60b241501c 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/8/compiler-rt/default.nix
@@ -1,15 +1,16 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
 stdenv.mkDerivation {
-  pname = "compiler-rt";
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
   src = fetch "compiler-rt" "0dqqf8f930l8gag4d9qjgn1n0pj0nbv2anviqqhdi1rkhas8z0hi";
 
@@ -29,14 +30,15 @@ stdenv.mkDerivation {
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ lib.optionals (useLLVM && !haveLibc) [
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
   ] ++ lib.optionals (useLLVM) [
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
-    "-DCMAKE_C_FLAGS=-nodefaultlibs"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -89,4 +91,19 @@ stdenv.mkDerivation {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
 
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/8/compiler-rt/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/8/compiler-rt/gnu-install-dirs.patch
index 1c2e7f0b3116f..a25fa90f98006 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/8/compiler-rt/gnu-install-dirs.patch
@@ -19,7 +19,7 @@ index 81b110203c27..df7598a11caf 100644
    # Install in Clang resource directory.
    install(FILES ${file_name}
 -    DESTINATION ${COMPILER_RT_INSTALL_PATH}/share
-+    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
++    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_DATADIR}
      COMPONENT ${component})
    add_dependencies(${component} ${target_name})
  
diff --git a/pkgs/development/compilers/llvm/8/default.nix b/pkgs/development/compilers/llvm/8/default.nix
index bcbbd155e36c1..a7a293cfbbf67 100644
--- a/pkgs/development/compilers/llvm/8/default.nix
+++ b/pkgs/development/compilers/llvm/8/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 }:
 
 let
@@ -16,6 +28,12 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "1qf3097bc5ia8p6cpmbx985rjr3yaah5s8fc0nv7pw742yv7jw8q";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands0 = cc: ''
@@ -26,27 +44,43 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
-    libllvm-polly = callPackage ./llvm { enablePolly = true; };
+    libllvm-polly = callPackage ./llvm {
+      inherit llvm_meta;
+      enablePolly = true;
+    };
 
     llvm-polly = tools.libllvm-polly.lib // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
 
     clang-polly-unwrapped = callPackage ./clang {
+      inherit llvm_meta;
       inherit clang-tools-extra_src;
       libllvm = tools.libllvm-polly;
       enablePolly = true;
@@ -85,9 +119,13 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
 
     # Below, is the LLVM bootstrapping logic. It handles building a
     # fully LLVM toolchain from scratch. No GCC toolchain should be
@@ -96,14 +134,21 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools-unwrapped = callPackage ./bintools {};
+
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
 
-    lldClang = wrapCCWith rec {
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
@@ -115,17 +160,17 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -136,13 +181,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -152,52 +194,77 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
-      }));
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
+               else stdenv;
+    };
+
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt = if stdenv.hostPlatform.isAndroid
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
-
-    libcxxabi = callPackage ./libc++abi ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/8/libc++/default.nix b/pkgs/development/compilers/llvm/8/libcxx/default.nix
index d73600b441d1d..804b9a53c24a1 100644
--- a/pkgs/development/compilers/llvm/8/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/8/libcxx/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "0y4vc9z36c1zlq15cnibdzxnc1xi5glbc6klnm8a41q3db4541kz";
@@ -17,7 +17,9 @@ stdenv.mkDerivation {
 
   patches = [
     ./gnu-install-dirs.patch
-  ] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   prePatch = ''
     substituteInPlace lib/CMakeLists.txt --replace "/usr/lib/libc++" "\''${LIBCXX_LIBCXXABI_LIB_PATH}/libc++"
@@ -51,10 +53,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.all;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/8/libcxx/gnu-install-dirs.patch
index 6af403ac86b44..6af403ac86b44 100644
--- a/pkgs/development/compilers/llvm/8/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/8/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/8/libc++abi/default.nix b/pkgs/development/compilers/llvm/8/libcxxabi/default.nix
index 5659bb4f14acf..593b1df9b7ade 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/8/libcxxabi/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "1vznz8n1z1h8af0ga451m98lc2hjnv4fyzl71napsvjhvk4g6nxp";
@@ -63,11 +63,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.all;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/8/libcxxabi/gnu-install-dirs.patch
index 3f924b0efbea7..3f924b0efbea7 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/8/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/8/libc++abi/no-threads.patch b/pkgs/development/compilers/llvm/8/libcxxabi/no-threads.patch
index 787f3e16500e2..787f3e16500e2 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi/no-threads.patch
+++ b/pkgs/development/compilers/llvm/8/libcxxabi/no-threads.patch
diff --git a/pkgs/development/compilers/llvm/8/libc++abi/wasm.patch b/pkgs/development/compilers/llvm/8/libcxxabi/wasm.patch
index 4ebfe46aa813d..4ebfe46aa813d 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi/wasm.patch
+++ b/pkgs/development/compilers/llvm/8/libcxxabi/wasm.patch
diff --git a/pkgs/development/compilers/llvm/8/libunwind/default.nix b/pkgs/development/compilers/llvm/8/libunwind/default.nix
index e38f2072cede0..244b5775bdc8c 100644
--- a/pkgs/development/compilers/llvm/8/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/8/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, fetchpatch
+{ lib, stdenv, llvm_meta, version, fetch, cmake, fetchpatch
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
@@ -25,4 +25,16 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
 }
diff --git a/pkgs/development/compilers/llvm/8/lld/default.nix b/pkgs/development/compilers/llvm/8/lld/default.nix
index 696403d1bf65a..66b59937e5f14 100644
--- a/pkgs/development/compilers/llvm/8/lld/default.nix
+++ b/pkgs/development/compilers/llvm/8/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -7,11 +7,11 @@
 , version
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "lld";
   inherit version;
 
-  src = fetch "lld" "121xhxrlvwy3k5nf6p1wv31whxlb635ssfkci8z93mwv4ja1xflz";
+  src = fetch pname "121xhxrlvwy3k5nf6p1wv31whxlb635ssfkci8z93mwv4ja1xflz";
 
   patches = [
     ./gnu-install-dirs.patch
@@ -28,10 +28,16 @@ stdenv.mkDerivation {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS), and
+      WebAssembly in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/lldb/default.nix b/pkgs/development/compilers/llvm/8/lldb/default.nix
index 95bf4aae05462..ee1f678996a61 100644
--- a/pkgs/development/compilers/llvm/8/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/8/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , cmake
 , zlib
@@ -70,10 +70,14 @@ stdenv.mkDerivation rec {
     ln -s $out/bin/llvm-vscode $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://llvm.org/";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/llvm/default.nix b/pkgs/development/compilers/llvm/8/llvm/default.nix
index 8ea9b287c7ce9..6f14b375c62cf 100644
--- a/pkgs/development/compilers/llvm/8/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/8/llvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
 , fetchpatch
@@ -168,12 +168,23 @@ in stdenv.mkDerivation ({
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -195,5 +206,7 @@ in stdenv.mkDerivation ({
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/8/openmp.nix b/pkgs/development/compilers/llvm/8/openmp.nix
deleted file mode 100644
index b5d75d9c87240..0000000000000
--- a/pkgs/development/compilers/llvm/8/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch "openmp" "0b3jlxhqbpyd1nqkpxjfggm5d9va5qpyf7d4i5y7n4a1mlydv19y";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/8/openmp/default.nix b/pkgs/development/compilers/llvm/8/openmp/default.nix
new file mode 100644
index 0000000000000..e8459d2798292
--- /dev/null
+++ b/pkgs/development/compilers/llvm/8/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch "openmp" "0b3jlxhqbpyd1nqkpxjfggm5d9va5qpyf7d4i5y7n4a1mlydv19y";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/llvm/9/bintools.nix b/pkgs/development/compilers/llvm/9/bintools/default.nix
index 53f7941e33699..53f7941e33699 100644
--- a/pkgs/development/compilers/llvm/9/bintools.nix
+++ b/pkgs/development/compilers/llvm/9/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/9/clang/default.nix b/pkgs/development/compilers/llvm/9/clang/default.nix
index f1c21083bb668..700fcb414fceb 100644
--- a/pkgs/development/compilers/llvm/9/clang/default.nix
+++ b/pkgs/development/compilers/llvm/9/clang/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
+{ lib, stdenv, llvm_meta, fetch, cmake, libxml2, libllvm, version, clang-tools-extra_src, python3
 , buildLlvmTools
 , fixDarwinDylibNames
 , enableManpages ? false
@@ -102,11 +102,20 @@ let
       inherit libllvm;
     };
 
-    meta = {
-      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = "https://llvm.org/";
-      license     = lib.licenses.ncsa;
-      platforms   = lib.platforms.all;
+    meta = llvm_meta // {
+      homepage = "https://clang.llvm.org/";
+      description = "A C language family frontend for LLVM";
+      longDescription = ''
+        The Clang project provides a language front-end and tooling
+        infrastructure for languages in the C language family (C, C++, Objective
+        C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.
+        It aims to deliver amazingly fast compiles, extremely useful error and
+        warning messages and to provide a platform for building great source
+        level tools. The Clang Static Analyzer and clang-tidy are tools that
+        automatically find bugs in your code, and are great examples of the sort
+        of tools that can be built using the Clang frontend as a library to
+        parse C/C++ code.
+      '';
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";
@@ -125,6 +134,8 @@ let
 
     doCheck = false;
 
-    meta.description = "man page for Clang ${version}";
+    meta = llvm_meta // {
+      description = "man page for Clang ${version}";
+    };
   });
 in self
diff --git a/pkgs/development/compilers/llvm/9/compiler-rt/default.nix b/pkgs/development/compilers/llvm/9/compiler-rt/default.nix
index 285fe811514ff..c31ce78ea0f77 100644
--- a/pkgs/development/compilers/llvm/9/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/9/compiler-rt/default.nix
@@ -1,17 +1,18 @@
-{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
+{ lib, stdenv, llvm_meta, version, fetch, cmake, python3, llvm, libcxxabi }:
 
 let
 
   useLLVM = stdenv.hostPlatform.useLLVM or false;
   bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
+  haveLibc = stdenv.cc.libc != null;
   inherit (stdenv.hostPlatform) isMusl;
 
 in
 
-stdenv.mkDerivation rec {
-  pname = "compiler-rt";
+stdenv.mkDerivation {
+  pname = "compiler-rt" + lib.optionalString (haveLibc) "-libc";
   inherit version;
-  src = fetch pname "0xwh79g3zggdabxgnd0bphry75asm1qz7mv3hcqihqwqr6aspgy2";
+  src = fetch "compiler-rt" "0xwh79g3zggdabxgnd0bphry75asm1qz7mv3hcqihqwqr6aspgy2";
 
   nativeBuildInputs = [ cmake python3 llvm.dev ];
   buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
@@ -29,14 +30,15 @@ stdenv.mkDerivation rec {
     "-DCOMPILER_RT_BUILD_XRAY=OFF"
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
-  ] ++ lib.optionals (useLLVM || bareMetal) [
+  ] ++ lib.optionals ((useLLVM || bareMetal) && !haveLibc) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
+  ] ++ lib.optionals (useLLVM && !haveLibc) [
+    "-DCMAKE_C_FLAGS=-nodefaultlibs"
   ] ++ lib.optionals (useLLVM) [
     "-DCOMPILER_RT_BUILD_BUILTINS=ON"
-    "-DCMAKE_C_FLAGS=-nodefaultlibs"
     #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
     "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
   ] ++ lib.optionals (bareMetal) [
@@ -87,4 +89,20 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
+
+  meta = llvm_meta // {
+    homepage = "https://compiler-rt.llvm.org/";
+    description = "Compiler runtime libraries";
+    longDescription = ''
+      The compiler-rt project provides highly tuned implementations of the
+      low-level code generator support routines like "__fixunsdfdi" and other
+      calls generated when a target doesn't have a short sequence of native
+      instructions to implement a core IR operation. It also provides
+      implementations of run-time libraries for dynamic testing tools such as
+      AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
+    '';
+    # "All of the code in the compiler-rt project is dual licensed under the MIT
+    # license and the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
 }
diff --git a/pkgs/development/compilers/llvm/9/compiler-rt/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/9/compiler-rt/gnu-install-dirs.patch
index 7967bbc48550d..9f63bef2f8610 100644
--- a/pkgs/development/compilers/llvm/9/compiler-rt/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/9/compiler-rt/gnu-install-dirs.patch
@@ -19,7 +19,7 @@ index f7ee932f214f..ef94a97c4be9 100644
    # Install in Clang resource directory.
    install(FILES ${file_name}
 -    DESTINATION ${COMPILER_RT_INSTALL_PATH}/share
-+    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
++    DESTINATION ${COMPILER_RT_INSTALL_PATH}/${CMAKE_INSTALL_FULL_DATADIR}
      COMPONENT ${component})
    add_dependencies(${component} ${target_name})
  
diff --git a/pkgs/development/compilers/llvm/9/default.nix b/pkgs/development/compilers/llvm/9/default.nix
index 0660bac137f69..8521354dbb8e8 100644
--- a/pkgs/development/compilers/llvm/9/default.nix
+++ b/pkgs/development/compilers/llvm/9/default.nix
@@ -1,7 +1,19 @@
-{ lowPrio, newScope, pkgs, lib, stdenv, cmake, gccForLibs
+{ lowPrio, newScope, pkgs, lib, stdenv, cmake
+, gccForLibs, preLibcCrossHeaders
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+# This is the default binutils, but with *this* version of LLD rather
+# than the default LLVM verion's, if LLD is the choice. We use these for
+# the `useLLVM` bootstrapping below.
+, bootBintoolsNoLibc ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintoolsNoLibc
+, bootBintools ?
+    if stdenv.targetPlatform.linker == "lld"
+    then null
+    else pkgs.bintools
 }:
 
 let
@@ -16,6 +28,12 @@ let
 
   clang-tools-extra_src = fetch "clang-tools-extra" "01vgzd4k1q93nfs8gyl83mjlc4x0qsgfqw32lacbjzdxg0mdfvxj";
 
+  llvm_meta = {
+    license     = lib.licenses.ncsa;
+    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill primeos ];
+    platforms   = lib.platforms.all;
+  };
+
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
     mkExtraBuildCommands0 = cc: ''
@@ -26,27 +44,43 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
     '';
 
+  bintoolsNoLibc' =
+    if bootBintoolsNoLibc == null
+    then tools.bintoolsNoLibc
+    else bootBintoolsNoLibc;
+  bintools' =
+    if bootBintools == null
+    then tools.bintools
+    else bootBintools;
+
   in {
 
-    libllvm = callPackage ./llvm { };
+    libllvm = callPackage ./llvm {
+      inherit llvm_meta;
+    };
 
     # `llvm` historically had the binaries.  When choosing an output explicitly,
     # we need to reintroduce `outputUnspecified` to get the expected behavior e.g. of lib.get*
     llvm = tools.libllvm.out // { outputUnspecified = true; };
 
-    libllvm-polly = callPackage ./llvm { enablePolly = true; };
+    libllvm-polly = callPackage ./llvm {
+      inherit llvm_meta;
+      enablePolly = true;
+    };
 
     llvm-polly = tools.libllvm-polly.lib // { outputUnspecified = true; };
 
     libclang = callPackage ./clang {
-      inherit clang-tools-extra_src;
+      inherit clang-tools-extra_src llvm_meta;
     };
 
     clang-unwrapped = tools.libclang.out // { outputUnspecified = true; };
 
     clang-polly-unwrapped = callPackage ./clang {
+      inherit llvm_meta;
       inherit clang-tools-extra_src;
       libllvm = tools.libllvm-polly;
       enablePolly = true;
@@ -85,9 +119,13 @@ let
       extraBuildCommands = mkExtraBuildCommands cc;
     };
 
-    lld = callPackage ./lld {};
+    lld = callPackage ./lld {
+      inherit llvm_meta;
+    };
 
-    lldb = callPackage ./lldb {};
+    lldb = callPackage ./lldb {
+      inherit llvm_meta;
+    };
 
     # Below, is the LLVM bootstrapping logic. It handles building a
     # fully LLVM toolchain from scratch. No GCC toolchain should be
@@ -96,14 +134,21 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools-unwrapped = callPackage ./bintools {};
+
+    bintoolsNoLibc = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+      libc = preLibcCrossHeaders;
+    };
 
-    lldClang = wrapCCWith rec {
+    bintools = wrapBintoolsWith {
+      bintools = tools.bintools-unwrapped;
+    };
+
+    clangUseLLVM = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
@@ -115,17 +160,17 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+        echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibcxx = wrapCCWith rec {
+    clangNoLibcxx = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-      };
+      bintools = bintools';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -136,13 +181,10 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoLibc = wrapCCWith rec {
+    clangNoLibc = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
@@ -152,52 +194,77 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith rec {
+    clangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
-      bintools = wrapBintoolsWith {
-        inherit (tools) bintools;
-        libc = null;
-      };
+      bintools = bintoolsNoLibc';
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands0 cc;
     };
 
+    clangNoCompilerRtWithLibc = wrapCCWith rec {
+      cc = tools.clang-unwrapped;
+      libcxx = null;
+      bintools = bintools';
+      extraPackages = [ ];
+      extraBuildCommands = mkExtraBuildCommands0 cc;
+    };
+
   });
 
   libraries = lib.makeExtensible (libraries: let
     callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
   in {
 
-    compiler-rt = callPackage ./compiler-rt ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoCompilerRt;
-      }));
+    compiler-rt-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
+               else stdenv;
+    };
+
+    compiler-rt-no-libc = callPackage ./compiler-rt {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
+               else stdenv;
+    };
+
+    # N.B. condition is safe because without useLLVM both are the same.
+    compiler-rt = if stdenv.hostPlatform.isAndroid
+      then libraries.compiler-rt-libc
+      else libraries.compiler-rt-no-libc;
 
     stdenv = overrideCC stdenv buildLlvmTools.clang;
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
-
-    libcxxabi = callPackage ./libc++abi ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-        libunwind = libraries.libunwind;
-      }));
+    libcxx = callPackage ./libcxx {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    openmp = callPackage ./openmp.nix {};
+    libcxxabi = callPackage ./libcxxabi {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
-    libunwind = callPackage ./libunwind ({} //
-      (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
-        stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
-      }));
+    libunwind = callPackage ./libunwind {
+      inherit llvm_meta;
+      stdenv = if stdenv.hostPlatform.useLLVM or false
+               then overrideCC stdenv buildLlvmTools.clangNoLibcxx
+               else stdenv;
+    };
 
+    openmp = callPackage ./openmp {
+      inherit llvm_meta;
+    };
   });
 
 in { inherit tools libraries; } // libraries // tools
diff --git a/pkgs/development/compilers/llvm/9/libc++/default.nix b/pkgs/development/compilers/llvm/9/libcxx/default.nix
index 3cdb4f32a050d..b2022f23e511f 100644
--- a/pkgs/development/compilers/llvm/9/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/9/libcxx/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
+{ lib, stdenv, llvm_meta, fetch, cmake, python3, libcxxabi, fixDarwinDylibNames, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "0d2bj5i6mk4caq7skd5nsdmz8c2m5w5anximl5wz3x32p08zz089";
@@ -17,7 +17,9 @@ stdenv.mkDerivation {
 
   patches = [
     ./gnu-install-dirs.patch
-  ] ++ lib.optional stdenv.hostPlatform.isMusl ../../libcxx-0001-musl-hacks.patch;
+  ] ++ lib.optionals stdenv.hostPlatform.isMusl [
+    ../../libcxx-0001-musl-hacks.patch
+  ];
 
   preConfigure = ''
     # Get headers from the cxxabi source so we can see private headers not installed by the cxxabi package
@@ -47,10 +49,15 @@ stdenv.mkDerivation {
     isLLVM = true;
   };
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxx.llvm.org/";
-    description = "A new implementation of the C++ standard library, targeting C++11";
-    license = with lib.licenses; [ ncsa mit ];
-    platforms = lib.platforms.all;
+    description = "C++ standard library";
+    longDescription = ''
+      libc++ is an implementation of the C++ standard library, targeting C++11,
+      C++14 and above.
+    '';
+    # "All of the code in libc++ is dual licensed under the MIT license and the
+    # UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/9/libc++/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/9/libcxx/gnu-install-dirs.patch
index 424488bd2e522..424488bd2e522 100644
--- a/pkgs/development/compilers/llvm/9/libc++/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/9/libcxx/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/9/libc++abi/default.nix b/pkgs/development/compilers/llvm/9/libcxxabi/default.nix
index 5358985f448ef..2af3322fd68d4 100644
--- a/pkgs/development/compilers/llvm/9/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/9/libcxxabi/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+{ lib, stdenv, llvm_meta, cmake, fetch, libcxx, libunwind, llvm, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "1b4aiaa8cirx52vk2p5kfk57qmbqf1ipb4nqnjhdgqps9jm7iyg8";
@@ -63,11 +63,15 @@ stdenv.mkDerivation {
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
 
-  meta = {
+  meta = llvm_meta // {
     homepage = "https://libcxxabi.llvm.org/";
-    description = "A new implementation of low level support for a standard C++ library";
-    license = with lib.licenses; [ ncsa mit ];
-    maintainers = with lib.maintainers; [ vlstill ];
-    platforms = lib.platforms.all;
+    description = "Provides C++ standard library support";
+    longDescription = ''
+      libc++abi is a new implementation of low level support for a standard C++ library.
+    '';
+    # "All of the code in libc++abi is dual licensed under the MIT license and
+    # the UIUC License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+    maintainers = llvm_meta.maintainers ++ [ lib.maintainers.vlstill ];
   };
 }
diff --git a/pkgs/development/compilers/llvm/9/libc++abi/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/9/libcxxabi/gnu-install-dirs.patch
index 70b41a6ff5318..70b41a6ff5318 100644
--- a/pkgs/development/compilers/llvm/9/libc++abi/gnu-install-dirs.patch
+++ b/pkgs/development/compilers/llvm/9/libcxxabi/gnu-install-dirs.patch
diff --git a/pkgs/development/compilers/llvm/9/libc++abi/no-threads.patch b/pkgs/development/compilers/llvm/9/libcxxabi/no-threads.patch
index 787f3e16500e2..787f3e16500e2 100644
--- a/pkgs/development/compilers/llvm/9/libc++abi/no-threads.patch
+++ b/pkgs/development/compilers/llvm/9/libcxxabi/no-threads.patch
diff --git a/pkgs/development/compilers/llvm/9/libc++abi/wasm.patch b/pkgs/development/compilers/llvm/9/libcxxabi/wasm.patch
index 4ebfe46aa813d..4ebfe46aa813d 100644
--- a/pkgs/development/compilers/llvm/9/libc++abi/wasm.patch
+++ b/pkgs/development/compilers/llvm/9/libcxxabi/wasm.patch
diff --git a/pkgs/development/compilers/llvm/9/libunwind/default.nix b/pkgs/development/compilers/llvm/9/libunwind/default.nix
index fdb362dcd2e3c..65b89c6bb18f0 100644
--- a/pkgs/development/compilers/llvm/9/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/9/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, version, fetch, cmake, fetchpatch
+{ lib, stdenv, llvm_meta, version, fetch, cmake, fetchpatch
 , enableShared ? !stdenv.hostPlatform.isStatic
 }:
 
@@ -17,4 +17,16 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
 }
diff --git a/pkgs/development/compilers/llvm/9/lld/default.nix b/pkgs/development/compilers/llvm/9/lld/default.nix
index cd84afe70e46f..d13e6a107dd9f 100644
--- a/pkgs/development/compilers/llvm/9/lld/default.nix
+++ b/pkgs/development/compilers/llvm/9/lld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , buildLlvmTools
 , fetch
 , cmake
@@ -28,10 +28,16 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" "dev" ];
 
-  meta = {
-    description = "The LLVM Linker";
-    homepage    = "https://lld.llvm.org/";
-    license     = lib.licenses.ncsa;
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://lld.llvm.org/";
+    description = "The LLVM linker";
+    longDescription = ''
+      LLD is a linker from the LLVM project that is a drop-in replacement for
+      system linkers and runs much faster than them. It also provides features
+      that are useful for toolchain developers.
+      The linker supports ELF (Unix), PE/COFF (Windows), Mach-O (macOS), and
+      WebAssembly in descending order of completeness. Internally, LLD consists
+      of several different linkers.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/9/lldb/default.nix b/pkgs/development/compilers/llvm/9/lldb/default.nix
index 6d753ce1a869c..9957a0218da8a 100644
--- a/pkgs/development/compilers/llvm/9/lldb/default.nix
+++ b/pkgs/development/compilers/llvm/9/lldb/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , fetch
 , cmake
 , zlib
@@ -70,10 +70,14 @@ stdenv.mkDerivation rec {
     ln -s $out/bin/llvm-vscode $out/share/vscode/extensions/llvm-org.lldb-vscode-0.1.0/bin
   '';
 
-  meta = with lib; {
+  meta = llvm_meta // {
+    homepage = "https://lldb.llvm.org/";
     description = "A next-generation high-performance debugger";
-    homepage    = "https://llvm.org/";
-    license     = licenses.ncsa;
-    platforms   = platforms.all;
+    longDescription = ''
+      LLDB is a next generation, high-performance debugger. It is built as a set
+      of reusable components which highly leverage existing libraries in the
+      larger LLVM Project, such as the Clang expression parser and LLVM
+      disassembler.
+    '';
   };
 }
diff --git a/pkgs/development/compilers/llvm/9/llvm/default.nix b/pkgs/development/compilers/llvm/9/llvm/default.nix
index 78d8d7b30ef0f..cf064b75b3f5c 100644
--- a/pkgs/development/compilers/llvm/9/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/9/llvm/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ lib, stdenv, llvm_meta
 , pkgsBuildBuild
 , fetch
 , cmake
@@ -57,6 +57,9 @@ in stdenv.mkDerivation (rec {
 
   patches = [
     ./gnu-install-dirs.patch
+    # Force a test to evaluate the saved benchmark for a CPU for which LLVM has
+    # an execution model. See NixOS/nixpkgs#119673.
+    ../../exegesis-force-bdver2.patch
   ] ++ lib.optional enablePolly ./gnu-install-dirs-polly.patch;
 
   postPatch = optionalString stdenv.isDarwin ''
@@ -179,12 +182,23 @@ in stdenv.mkDerivation (rec {
   checkTarget = "check-all";
 
   requiredSystemFeatures = [ "big-parallel" ];
-  meta = {
-    description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = "https://llvm.org/";
-    license     = lib.licenses.ncsa;
-    maintainers = with lib.maintainers; [ lovek323 raskin dtzWill ];
-    platforms   = lib.platforms.all;
+  meta = llvm_meta // {
+    homepage = "https://llvm.org/";
+    description = "A collection of modular and reusable compiler and toolchain technologies";
+    longDescription = ''
+      The LLVM Project is a collection of modular and reusable compiler and
+      toolchain technologies. Despite its name, LLVM has little to do with
+      traditional virtual machines. The name "LLVM" itself is not an acronym; it
+      is the full name of the project.
+      LLVM began as a research project at the University of Illinois, with the
+      goal of providing a modern, SSA-based compilation strategy capable of
+      supporting both static and dynamic compilation of arbitrary programming
+      languages. Since then, LLVM has grown to be an umbrella project consisting
+      of a number of subprojects, many of which are being used in production by
+      a wide variety of commercial and open source projects as well as being
+      widely used in academic research. Code in the LLVM project is licensed
+      under the "Apache 2.0 License with LLVM exceptions".
+    '';
   };
 } // lib.optionalAttrs enableManpages {
   pname = "llvm-manpages";
@@ -206,5 +220,7 @@ in stdenv.mkDerivation (rec {
 
   doCheck = false;
 
-  meta.description = "man pages for LLVM ${version}";
+  meta = llvm_meta // {
+    description = "man pages for LLVM ${version}";
+  };
 })
diff --git a/pkgs/development/compilers/llvm/9/openmp.nix b/pkgs/development/compilers/llvm/9/openmp.nix
deleted file mode 100644
index 416916f57ff2c..0000000000000
--- a/pkgs/development/compilers/llvm/9/openmp.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ lib
-, stdenv
-, fetch
-, cmake
-, llvm
-, perl
-, version
-}:
-
-stdenv.mkDerivation rec {
-  pname = "openmp";
-  inherit version;
-
-  src = fetch pname "1knafnpp0f7hylx8q20lkd6g1sf0flly572dayc5d5kghh7hd52w";
-
-  nativeBuildInputs = [ cmake perl ];
-  buildInputs = [ llvm ];
-
-  meta = {
-    description = "Components required to build an executable OpenMP program";
-    homepage    = "https://openmp.llvm.org/";
-    license     = lib.licenses.mit;
-    platforms   = lib.platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/llvm/9/openmp/default.nix b/pkgs/development/compilers/llvm/9/openmp/default.nix
new file mode 100644
index 0000000000000..bedd191d51345
--- /dev/null
+++ b/pkgs/development/compilers/llvm/9/openmp/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, llvm_meta
+, fetch
+, cmake
+, llvm
+, perl
+, version
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openmp";
+  inherit version;
+
+  src = fetch pname "1knafnpp0f7hylx8q20lkd6g1sf0flly572dayc5d5kghh7hd52w";
+
+  nativeBuildInputs = [ cmake perl ];
+  buildInputs = [ llvm ];
+
+  meta = llvm_meta // {
+    homepage = "https://openmp.llvm.org/";
+    description = "Support for the OpenMP language";
+    longDescription = ''
+      The OpenMP subproject of LLVM contains the components required to build an
+      executable OpenMP program that are outside the compiler itself.
+      Contains the code for the runtime library against which code compiled by
+      "clang -fopenmp" must be linked before it can run and the library that
+      supports offload to target devices.
+    '';
+    # "All of the code is dual licensed under the MIT license and the UIUC
+    # License (a BSD-like license)":
+    license = with lib.licenses; [ mit ncsa ];
+  };
+}
diff --git a/pkgs/development/compilers/rust/1_51.nix b/pkgs/development/compilers/rust/1_52.nix
index 17fafa4c7cb07..775792d06f602 100644
--- a/pkgs/development/compilers/rust/1_51.nix
+++ b/pkgs/development/compilers/rust/1_52.nix
@@ -19,8 +19,8 @@
 } @ args:
 
 import ./default.nix {
-  rustcVersion = "1.51.0";
-  rustcSha256 = "0ixqkqglv3isxbvl4ldr4byrkx692wghsz3fasy1pn5kr2prnsvs";
+  rustcVersion = "1.52.1";
+  rustcSha256 = "sha256-Om8jom0Oj4erv78yxc19qgwLcdCYar78Vrml+/vQv5g=";
 
   llvmSharedForBuild = pkgsBuildBuild.llvmPackages_11.libllvm.override { enableSharedLibraries = true; };
   llvmSharedForHost = pkgsBuildHost.llvmPackages_11.libllvm.override { enableSharedLibraries = true; };
@@ -33,23 +33,23 @@ import ./default.nix {
 
   # Note: the version MUST be one version prior to the version we're
   # building
-  bootstrapVersion = "1.50.0";
+  bootstrapVersion = "1.51.0";
 
   # fetch hashes by running `print-hashes.sh ${bootstrapVersion}`
   bootstrapHashes = {
-    i686-unknown-linux-gnu = "dee56dc425ed5d8e8112f26fba3060fd324c49f1261e0b7e8e29f7d9b852b09a";
-    x86_64-unknown-linux-gnu = "fa889b53918980aea2dea42bfae4e858dcb2104c6fdca6e4fe359f3a49767701";
-    x86_64-unknown-linux-musl = "867cbfb35f5dc9b43e230132ea9e7bfa98d471a9248e41b08ced2266e5ccd00f";
-    arm-unknown-linux-gnueabihf = "1b72979244450e4047ab536448d6720699e1fae0ab1c4ade114099a3037e274b";
-    armv7-unknown-linux-gnueabihf = "f1dde566c4e6ca2e1133c84170e46e566765a21894e1038e1cdc32745d7274ef";
-    aarch64-unknown-linux-gnu = "1db7a4fbddc68cd29eb9bca9fa7d0d2d9e3d59ede7ddaad66222fb4336a6bacf";
-    aarch64-unknown-linux-musl = "adcc6c76a8967bacb6687b565d3cf739e35fde066b03edb745b05b52fa8b5b36";
-    x86_64-apple-darwin = "1bf5a7ecf6468ce1bf9fe49c8083b3f648b40c16fbfb7539d106fe28eb0e792e";
-    aarch64-apple-darwin = "1ed91a867e7b86cc4bc84c0838240f1c25acd007100ec9f7a14c4873e4b56561";
-    powerpc64le-unknown-linux-gnu = "e0472589d3f9ba7ebf27f033af320e0d5cfb70222955bd8ed73ce2c9a70ae535";
+    i686-unknown-linux-gnu = "de2e8ef724d89ba6f567f07ebacf5a244c7cdae30ee559f1913310eda38d9cd1";
+    x86_64-unknown-linux-gnu = "9e125977aa13f012a68fdc6663629c685745091ae244f0587dd55ea4e3a3e42f";
+    x86_64-unknown-linux-musl = "cb65c3a19ba0e09a94ccfd8551e648efaa1db52b0db19ae475d35a46f8750871";
+    arm-unknown-linux-gnueabihf = "ab26464947ce80b4c361b08242dc215a5664f9f4ad23f66891ec27d55a0440b7";
+    armv7-unknown-linux-gnueabihf = "5d381b7ee16c559efefedfac7ec4d392e838fddaf50049255844dcff2b2614dd";
+    aarch64-unknown-linux-gnu = "fd31c78fffad52c03cac5a7c1ee5db3f34b2a77d7bc862707c0f71e209180a84";
+    aarch64-unknown-linux-musl = "06cdaa1117dcdd392ede938b655b9bc45cf2a76bd42870ca223189e6eb29d435";
+    x86_64-apple-darwin = "765212098a415996b767d1e372ce266caf94027402b269fec33291fffc085ca4";
+    aarch64-apple-darwin = "95d0410bbd20b05f8b7d5adf70e8737873995bc86611a90e643d7081ca35147f";
+    powerpc64le-unknown-linux-gnu = "7362f561104d7be4836507d3a53cd39444efcdf065813d559beb1f54ce9f7680";
   };
 
-  selectRustPackage = pkgs: pkgs.rust_1_51;
+  selectRustPackage = pkgs: pkgs.rust_1_52;
 
   rustcPatches = [
   ];
diff --git a/pkgs/development/compilers/rust/cargo.nix b/pkgs/development/compilers/rust/cargo.nix
index 3a7f29e322939..3ada23e74882e 100644
--- a/pkgs/development/compilers/rust/cargo.nix
+++ b/pkgs/development/compilers/rust/cargo.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, file, curl, pkg-config, python3, openssl, cmake, zlib
-, installShellFiles, makeWrapper, libiconv, cacert, rustPlatform, rustc
+, installShellFiles, makeWrapper, cacert, rustPlatform, rustc
 , CoreFoundation, Security
 }:
 
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ pkg-config cmake installShellFiles makeWrapper ];
   buildInputs = [ cacert file curl python3 openssl zlib ]
-    ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security libiconv ];
+    ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
 
   # cargo uses git-rs which is made for a version of libgit2 from recent master that
   # is not compatible with the current version in nixpkgs.
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index b9bccf9f16e91..b8fca884edcf0 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -3,6 +3,7 @@
 , fetchurl, file, python3
 , darwin, cmake, rust, rustPlatform
 , pkg-config, openssl
+, libiconv
 , which, libffi
 , withBundledLLVM ? false
 , enableRustcDev ? true
@@ -137,7 +138,7 @@ in stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ optional stdenv.isDarwin Security
+    ++ optionals stdenv.isDarwin [ libiconv Security ]
     ++ optional (!withBundledLLVM) llvmShared;
 
   outputs = [ "out" "man" "doc" ];
diff --git a/pkgs/development/compilers/sbcl/2.0.8.nix b/pkgs/development/compilers/sbcl/2.0.8.nix
index bbc171a8d9863..1784bf672b318 100644
--- a/pkgs/development/compilers/sbcl/2.0.8.nix
+++ b/pkgs/development/compilers/sbcl/2.0.8.nix
@@ -1,4 +1,4 @@
 import ./common.nix {
-  version = "2.0.8";
-  sha256 = "1xwrwvps7drrpyw3wg5h3g2qajmkwqs9gz0fdw1ns9adp7vld390";
+  version = "2.1.2";
+  sha256 = "sha256-t3EFUJOYVe1JWYxKAUSD7RILaZFliio7avpHcT3OTAs=";
 }
diff --git a/pkgs/development/compilers/sbcl/bootstrap.nix b/pkgs/development/compilers/sbcl/bootstrap.nix
index 8bdbbadc9d60d..eaf1ff24d3e7a 100644
--- a/pkgs/development/compilers/sbcl/bootstrap.nix
+++ b/pkgs/development/compilers/sbcl/bootstrap.nix
@@ -2,6 +2,11 @@
 
 let
   options = rec {
+    aarch64-darwin = {
+      version = "2.1.2";
+      system = "arm64-darwin";
+      sha256 = "sha256-H0ALigXcWIypdA+fTf7jERscwbb7QIAfcoxCtGDh0RU=";
+    };
     x86_64-darwin = {
       version = "1.2.11";
       system = "x86-64-darwin";
diff --git a/pkgs/development/compilers/sbcl/common.nix b/pkgs/development/compilers/sbcl/common.nix
index 11ae960a53171..b020eeafc5cbe 100644
--- a/pkgs/development/compilers/sbcl/common.nix
+++ b/pkgs/development/compilers/sbcl/common.nix
@@ -2,7 +2,7 @@
 
 { lib, stdenv, fetchurl, writeText, sbclBootstrap
 , sbclBootstrapHost ? "${sbclBootstrap}/bin/sbcl --disable-debugger --no-userinit --no-sysinit"
-, threadSupport ? (stdenv.isi686 || stdenv.isx86_64 || "aarch64-linux" == stdenv.hostPlatform.system)
+, threadSupport ? (stdenv.isi686 || stdenv.isx86_64 || "aarch64-linux" == stdenv.hostPlatform.system || "aarch64-darwin" == stdenv.hostPlatform.system)
 , disableImmobileSpace ? false
   # Meant for sbcl used for creating binaries portable to non-NixOS via save-lisp-and-die.
   # Note that the created binaries still need `patchelf --set-interpreter ...`
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
                   lib.concatStringsSep " "
                     (builtins.map (x: "--with-${x}") enableFeatures ++
                      builtins.map (x: "--without-${x}") disableFeatures)
-                }
+                } ${if stdenv.hostPlatform.system == "aarch64-darwin" then "--arch=arm64" else ""}
     (cd doc/manual ; make info)
 
     runHook postBuild
diff --git a/pkgs/development/compilers/zz/default.nix b/pkgs/development/compilers/zz/default.nix
index 81c6e546e95ff..a0bf9a9ad8ff3 100644
--- a/pkgs/development/compilers/zz/default.nix
+++ b/pkgs/development/compilers/zz/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ makeWrapper ];
 
-  cargoSha256 = "0i3c459d4699z4dwvdw1495krdv3c2qpygrsw0cz3j0zd2n5gqj6";
+  cargoSha256 = "03xdmm4993hqdb3cihjjv4n4mdk8lnlccva08fh6m1d56p807rni";
 
   postPatch = ''
     # remove search path entry which would reference /build
diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 693a5b61fbc43..f293048e81792 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -203,6 +203,13 @@ self: super: {
           sha256 = "0pqmijfkysjixg3gb4kmrqdif7s2saz8qi6k337jf15i0npzln8d";
           revert = true;
         })
+        # fix broken location annotations (necessary for update-nix-fetchgit).
+        # Can be removed on the next hnix release after
+        # https://github.com/haskell-nix/hnix/pull/936 is merged.
+        (pkgs.fetchpatch {
+          url = "https://github.com/expipiplus1/hnix/commit/7cd998426ab7d930d288a1d6e266dc4e85cece3d.patch";
+          sha256 = "19ay6vxa90ykgdd0fis2djvki2kpgfsq7z55iyqg965m583vsfr6";
+        })
       ] ++ (drv.patches or []);
     }));
 
@@ -1405,10 +1412,7 @@ self: super: {
         }"
       '';
 
-      # 2021-04-09: test failure
-      # PR pending https://github.com/expipiplus1/update-nix-fetchgit/pull/60
-      doCheck = false;
-
+      # These can both be removed upon the release of update-nix-fetchgit-0.2.7
       patches = [
         # 2021-05-17 compile with hnix >= 0.13
         # https://github.com/expipiplus1/update-nix-fetchgit/pull/64
@@ -1416,6 +1420,12 @@ self: super: {
           url = "https://github.com/expipiplus1/update-nix-fetchgit/commit/bc28c8b26c38093aa950574802012c0cd8447ce8.patch";
           sha256 = "1dwd1jdsrx3ss6ql1bk2ch7ln74mkq6jy9ms8vi8kmf3gbg8l9fg";
         })
+        # Fix test failure
+        # https://github.com/expipiplus1/update-nix-fetchgit/pull/60
+        (pkgs.fetchpatch {
+          url = "https://github.com/expipiplus1/update-nix-fetchgit/commit/4a43e1ea4e7e1c18de81e3f9fe0b86faa70865f5.patch";
+          sha256 = "1z74c1blgwr4q37m1rhlj7534qbnp3nnxf63m8j2b7iz0ljgm0m9";
+        })
       ] ++ (drv.patches or []);
     }));
 
diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index d6ba795d20ada..5ee88ebb8810d 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -258,7 +258,7 @@ in with passthru; stdenv.mkDerivation ({
     LDFLAGS = lib.optionalString (!stdenv.isDarwin) "-lgcc_s";
     inherit (mkPaths buildInputs) C_INCLUDE_PATH LIBRARY_PATH;
 
-    NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin "-msse2"
+    NIX_CFLAGS_COMPILE = optionalString (stdenv.targetPlatform.system == "x86_64-darwin") "-msse2"
       + optionalString stdenv.hostPlatform.isMusl " -DTHREAD_STACK_SIZE=0x100000";
     DETERMINISTIC_BUILD = 1;
 
diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index 5f13418aa5886..328ed715baee9 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -73,13 +73,14 @@ with pkgs;
           optionalExtensions = cond: as: if cond then as else [];
           python2Extension = import ../../../top-level/python2-packages.nix;
           extensions = lib.composeManyExtensions ((optionalExtensions (!self.isPy3k) [python2Extension]) ++ [ overrides ]);
+          aliases = self: super: lib.optionalAttrs (config.allowAliases or true) (import ../../../top-level/python-aliases.nix lib self super);
         in lib.makeScopeWithSplicing
           pkgs.splicePackages
           pkgs.newScope
           otherSplices
           keep
           extra
-          (lib.extends extensions pythonPackagesFun))
+          (lib.extends (lib.composeExtensions aliases extensions) pythonPackagesFun))
         {
           overrides = packageOverrides;
         };
diff --git a/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh b/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
index eb45205ff731f..0f708f888292b 100644
--- a/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
+++ b/pkgs/development/interpreters/python/hooks/pytest-check-hook.sh
@@ -2,7 +2,7 @@
 echo "Sourcing pytest-check-hook"
 
 declare -ar disabledTests
-declare -ar disabledTestPaths
+declare -a disabledTestPaths
 
 function _concatSep {
     local result
@@ -37,6 +37,11 @@ function pytestCheckPhase() {
         disabledTestsString=$(_pytestComputeDisabledTestsString "${disabledTests[@]}")
       args+=" -k \""$disabledTestsString"\""
     fi
+
+    if [ -n "${disabledTestPaths-}" ]; then
+        eval "disabledTestPaths=($disabledTestPaths)"
+    fi
+
     for path in ${disabledTestPaths[@]}; do
       if [ ! -e "$path" ]; then
         echo "Disabled tests path \"$path\" does not exist. Aborting"
diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index e9c769821d6f6..4917b167046ec 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -93,6 +93,8 @@
 
 , doCheck ? config.doCheckByDefault or false
 
+, disabledTestPaths ? []
+
 , ... } @ attrs:
 
 
@@ -108,6 +110,7 @@ let
 
   self = toPythonModule (stdenv.mkDerivation ((builtins.removeAttrs attrs [
     "disabled" "checkPhase" "checkInputs" "doCheck" "doInstallCheck" "dontWrapPythonPrograms" "catchConflicts" "format"
+    "disabledTestPaths"
   ]) // {
 
     name = namePrefix + name_;
@@ -178,6 +181,8 @@ let
     # If given use the specified checkPhase, otherwise use the setup hook.
     # Longer-term we should get rid of `checkPhase` and use `installCheckPhase`.
     installCheckPhase = attrs.checkPhase;
+  } //  lib.optionalAttrs (disabledTestPaths != []) {
+      disabledTestPaths = lib.escapeShellArgs disabledTestPaths;
   }));
 
   passthru.updateScript = let
diff --git a/pkgs/development/interpreters/wasmer/default.nix b/pkgs/development/interpreters/wasmer/default.nix
index eb17fda083017..d19600f39b854 100644
--- a/pkgs/development/interpreters/wasmer/default.nix
+++ b/pkgs/development/interpreters/wasmer/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     fetchSubmodules = true;
   };
 
-  cargoSha256 = "08r2b4s005w8r207jwq2fd43y3prgd8pg1m72aww1r7yrbxdr0v2";
+  cargoSha256 = "140bzxhsyfif99x5a1m1d45ppb6jzvy9m4xil7z1wg2pnq9k7zz8";
 
   nativeBuildInputs = [ cmake pkg-config ];
 
diff --git a/pkgs/development/interpreters/wasmtime/default.nix b/pkgs/development/interpreters/wasmtime/default.nix
index 9afca8f1f714e..675a7cdd6bc04 100644
--- a/pkgs/development/interpreters/wasmtime/default.nix
+++ b/pkgs/development/interpreters/wasmtime/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
     fetchSubmodules = true;
   };
 
-  cargoSha256 = "1r1fm28zaxfbzd17jzaz8ql6ss6y6djgdhpfpkvpbw9l8l06x4lc";
+  cargoSha256 = "1wlig9gls7s1k1swxwhl82vfga30bady8286livxc4y2zp0vb18w";
 
   nativeBuildInputs = [ python cmake clang ];
   buildInputs = [ llvmPackages.libclang ] ++
diff --git a/pkgs/development/libraries/abseil-cpp/cmake-full-dirs.patch b/pkgs/development/libraries/abseil-cpp/cmake-full-dirs.patch
new file mode 100644
index 0000000000000..c18420711b901
--- /dev/null
+++ b/pkgs/development/libraries/abseil-cpp/cmake-full-dirs.patch
@@ -0,0 +1,15 @@
+diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
+index 1a80b5b..1fa57a7 100644
+--- a/CMake/AbseilHelpers.cmake
++++ b/CMake/AbseilHelpers.cmake
+@@ -171,8 +171,8 @@ function(absl_cc_library)
+       FILE(GENERATE OUTPUT "${CMAKE_BINARY_DIR}/lib/pkgconfig/absl_${_NAME}.pc" CONTENT "\
+ prefix=${CMAKE_INSTALL_PREFIX}\n\
+ exec_prefix=\${prefix}\n\
+-libdir=\${prefix}/${CMAKE_INSTALL_LIBDIR}\n\
+-includedir=\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}\n\
++libdir=${CMAKE_INSTALL_FULL_LIBDIR}\n\
++includedir=${CMAKE_INSTALL_FULL_INCLUDEDIR}\n\
+ \n\
+ Name: absl_${_NAME}\n\
+ Description: Abseil ${_NAME} library\n\
diff --git a/pkgs/development/libraries/abseil-cpp/default.nix b/pkgs/development/libraries/abseil-cpp/default.nix
index 0813a965524b2..a1610ce82624d 100644
--- a/pkgs/development/libraries/abseil-cpp/default.nix
+++ b/pkgs/development/libraries/abseil-cpp/default.nix
@@ -1,16 +1,25 @@
-{ lib, stdenv, fetchFromGitHub, cmake, static ? stdenv.hostPlatform.isStatic }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake, static ? stdenv.hostPlatform.isStatic }:
 
 stdenv.mkDerivation rec {
   pname = "abseil-cpp";
-  version = "20200923.3";
+  version = "20210324.1";
 
   src = fetchFromGitHub {
     owner = "abseil";
     repo = "abseil-cpp";
     rev = version;
-    sha256 = "1p4djhm1f011ficbjjxx3n8428p8481p20j4glpaawnpsi362hkl";
+    sha256 = "16w63brfwgiayiyhvawsnr14xyy5hpp68k8fj0z6yk0bjzw6jvjw";
   };
 
+  patches = [
+    # Use CMAKE_INSTALL_FULL_{LIBDIR,INCLUDEDIR}
+    # https://github.com/abseil/abseil-cpp/pull/963
+    (fetchpatch {
+      url = "https://github.com/abseil/abseil-cpp/commit/5bfa70c75e621c5d5ec095c8c4c0c050dcb2957e.patch";
+      sha256 = "0nhjxqfxpi2pkfinnqvd5m4npf9l1kg39mjx9l3087ajhadaywl5";
+    })
+  ];
+
   cmakeFlags = [
     "-DCMAKE_CXX_STANDARD=17"
     "-DBUILD_SHARED_LIBS=${if static then "OFF" else "ON"}"
diff --git a/pkgs/development/libraries/apr/default.nix b/pkgs/development/libraries/apr/default.nix
index c7a1073d137a2..03b6c9777dfde 100644
--- a/pkgs/development/libraries/apr/default.nix
+++ b/pkgs/development/libraries/apr/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl }:
+{ lib, stdenv, fetchurl, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   name = "apr-1.7.0";
@@ -36,6 +36,10 @@ stdenv.mkDerivation rec {
 
   CPPFLAGS=lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) "-DAPR_IOVEC_DEFINED";
 
+  nativeBuildInputs =
+    # Update libtool for macOS 11 support
+    lib.optional (stdenv.isDarwin && stdenv.isAarch64) [ autoreconfHook ];
+
   enableParallelBuilding = true;
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/caf/default.nix b/pkgs/development/libraries/caf/default.nix
index a5baef8af1ed4..60281e7e0c9f3 100644
--- a/pkgs/development/libraries/caf/default.nix
+++ b/pkgs/development/libraries/caf/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "actor-framework";
-  version = "0.18.1";
+  version = "0.18.3";
 
   src = fetchFromGitHub {
     owner = "actor-framework";
     repo = "actor-framework";
     rev = version;
-    sha256 = "sha256-tRR+YFI/Ikf4rov4dzt59nDqaooALNspKEQehHP6sKU=";
+    sha256 = "sha256-9oQVsfh2mUVr64PjNXYD1wRBNJ8dCLO9eI5WnZ1SSww=";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/libraries/cairomm/1.16.nix b/pkgs/development/libraries/cairomm/1.16.nix
index 2e936607e8e9c..df9b8572ad0fc 100644
--- a/pkgs/development/libraries/cairomm/1.16.nix
+++ b/pkgs/development/libraries/cairomm/1.16.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "cairomm";
-  version = "1.16.0";
+  version = "1.16.1";
 
   outputs = [ "out" "dev" ];
 
   src = fetchurl {
     url = "https://www.cairographics.org/releases/${pname}-${version}.tar.xz";
-    sha256 = "1ya4y7qa000cjawqwswbqv26y5icfkmhs5iiiil4dxgrqn91923y";
+    sha256 = "sha256-b2Bg2OmN1Lis/uIpX92904z0h8B8JqrY0ag7ub/0osY=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/libraries/catch/default.nix b/pkgs/development/libraries/catch/default.nix
index 2aa5c788dc362..c89fbd477c960 100644
--- a/pkgs/development/libraries/catch/default.nix
+++ b/pkgs/development/libraries/catch/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake }:
 
 stdenv.mkDerivation rec {
   pname = "catch";
@@ -14,6 +14,14 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
   cmakeFlags = [ "-DUSE_CPP14=ON" ];
 
+  patches = [
+    # https://github.com/catchorg/Catch2/pull/2151
+    (fetchpatch {
+      url = "https://github.com/catchorg/Catch2/commit/bb6d08323f23a39eb65dd86671e68f4f5d3f2d6c.patch";
+      sha256 = "1vhbzx84nrhhf9zlbl6h5zmg3r5w5v833ihlswsysb9wp2i4isc5";
+    })
+  ];
+
   doCheck = true;
   checkTarget = "test";
 
diff --git a/pkgs/development/libraries/cereal/default.nix b/pkgs/development/libraries/cereal/default.nix
index d2321175f8bdf..958a92dec34e5 100644
--- a/pkgs/development/libraries/cereal/default.nix
+++ b/pkgs/development/libraries/cereal/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake }:
 stdenv.mkDerivation rec {
   pname = "cereal";
   version = "1.3.0";
@@ -12,7 +12,19 @@ stdenv.mkDerivation rec {
     sha256 = "0hc8wh9dwpc1w1zf5lfss4vg5hmgpblqxbrpp1rggicpx9ar831p";
   };
 
-  cmakeFlagsArray = [ "-DJUST_INSTALL_CEREAL=yes" ];
+  patches = [
+    # https://nvd.nist.gov/vuln/detail/CVE-2020-11105
+    # serialized std::shared_ptr variables cannot always be expected to
+    # serialize back into their original values. This can have any number of
+    # consequences, depending on the context within which this manifests.
+    (fetchpatch {
+      name = "CVE-2020-11105.patch";
+      url = "https://github.com/USCiLab/cereal/commit/f27c12d491955c94583512603bf32c4568f20929.patch";
+      sha256 = "CIkbJ7bAN0MXBhTXQdoQKXUmY60/wQvsdn99FaWt31w=";
+    })
+  ];
+
+  cmakeFlags = [ "-DJUST_INSTALL_CEREAL=yes" ];
 
   meta = with lib; {
     description = "A header-only C++11 serialization library";
diff --git a/pkgs/development/libraries/fontconfig/default.nix b/pkgs/development/libraries/fontconfig/default.nix
index 5eb180731f315..c0846edbbfe40 100644
--- a/pkgs/development/libraries/fontconfig/default.nix
+++ b/pkgs/development/libraries/fontconfig/default.nix
@@ -61,6 +61,11 @@ stdenv.mkDerivation rec {
       url = "https://gitlab.freedesktop.org/fontconfig/fontconfig/commit/409b37c62780728755c908991c912a6b16f2389c.patch";
       sha256 = "zJFh37QErSAINPGFkFVJyhYRP27BuIN7PIgoDl/PIwI=";
     })
+
+    # Combination of
+    # https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/88
+    # https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/131
+    ./macos-atomics.h
   ];
 
   outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config
diff --git a/pkgs/development/libraries/fontconfig/macos-atomics.h b/pkgs/development/libraries/fontconfig/macos-atomics.h
new file mode 100644
index 0000000000000..07b0cf1d52dc2
--- /dev/null
+++ b/pkgs/development/libraries/fontconfig/macos-atomics.h
@@ -0,0 +1,39 @@
+--- a/src/fcatomic.h	2020-11-27 13:23:44.000000000 +0900
++++ b/src/fcatomic.h	2020-11-27 13:24:43.000000000 +0900
+@@ -70,24 +70,25 @@
+ #elif !defined(FC_NO_MT) && defined(__APPLE__)
+ 
+ #include <libkern/OSAtomic.h>
+-#ifdef __MAC_OS_X_MIN_REQUIRED
+ #include <AvailabilityMacros.h>
+-#elif defined(__IPHONE_OS_MIN_REQUIRED)
+-#include <Availability.h>
+-#endif
+ 
+ typedef int fc_atomic_int_t;
+ #define fc_atomic_int_add(AI, V)	(OSAtomicAdd32Barrier ((V), &(AI)) - (V))
+ 
+-#define fc_atomic_ptr_get(P)		(OSMemoryBarrier (), (void *) *(P))
+-#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
+-#define fc_atomic_ptr_cmpexch(P,O,N)	OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
+-#else
+-#if __ppc64__ || __x86_64__
+-#define fc_atomic_ptr_cmpexch(P,O,N)	OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
++#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 20100)
++
++#if SIZEOF_VOID_P == 8
++#define fc_atomic_ptr_get(P)		OSAtomicAdd64Barrier (0, (int64_t*)(P))
++#elif SIZEOF_VOID_P == 4
++#define fc_atomic_ptr_get(P)		OSAtomicAdd32Barrier (0, (int32_t*)(P))
+ #else
+-#define fc_atomic_ptr_cmpexch(P,O,N)	OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
++#error "SIZEOF_VOID_P not 4 or 8 (assumes CHAR_BIT is 8)"
+ #endif
++
++#define fc_atomic_ptr_cmpexch(P,O,N)	OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
++
++#else
++#error "Your macOS / iOS targets are too old"
+ #endif
+ 
+ #elif !defined(FC_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
diff --git a/pkgs/development/libraries/gcr/default.nix b/pkgs/development/libraries/gcr/default.nix
index 94487ff6b4d7e..37238a5f59ec9 100644
--- a/pkgs/development/libraries/gcr/default.nix
+++ b/pkgs/development/libraries/gcr/default.nix
@@ -74,8 +74,6 @@ stdenv.mkDerivation rec {
 
   doCheck = false; # fails 21 out of 603 tests, needs dbus daemon
 
-  enableParallelBuilding = true;
-
   preFixup = ''
     wrapProgram "$out/bin/gcr-viewer" \
       --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH"
diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index 08f7c9a4c7805..e15f59757862e 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -45,15 +45,16 @@ in
 
 stdenv.mkDerivation rec {
   pname = "glib";
-  version = "2.68.1";
+  version = "2.68.2";
 
   src = fetchurl {
     url = "mirror://gnome/sources/glib/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "sha256-JBZUuWvTa4iqoSgU78SEO1eOVdR0QBA3J5Waw0aUQzM=";
+    sha256 = "sha256-7Md5ipzANOq9/X8kbm3UYc2/EXX8wumGfMfae3MJ4Ps=";
   };
 
   patches = optionals stdenv.isDarwin [
     ./darwin-compilation.patch
+    ./link-with-coreservices.patch
   ] ++ optionals stdenv.hostPlatform.isMusl [
     ./quark_init_on_demand.patch
     ./gobject_init_on_demand.patch
diff --git a/pkgs/development/libraries/glib/link-with-coreservices.patch b/pkgs/development/libraries/glib/link-with-coreservices.patch
new file mode 100644
index 0000000000000..dcc0a8998cc3b
--- /dev/null
+++ b/pkgs/development/libraries/glib/link-with-coreservices.patch
@@ -0,0 +1,11 @@
+--- a/meson.build.orig	2020-11-25 13:47:38.499149252 +0900
++++ b/meson.build	2020-11-25 13:48:47.098444800 +0900
+@@ -742,7 +742,7 @@
+ 
+   if glib_have_carbon
+     glib_conf.set('HAVE_CARBON', true)
+-    osx_ldflags += '-Wl,-framework,Carbon'
++    osx_ldflags += ['-Wl,-framework,Carbon', '-Wl,-framework,CoreServices']
+     glib_have_os_x_9_or_later = objcc.compiles('''#include <AvailabilityMacros.h>
+                                                   #if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
+                                                   #error Compiling for minimum OS X version before 10.9
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index 0108214a56ee3..3597dd70f2c90 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -32,7 +32,7 @@
 , python3Minimal
 }:
 
-{ name
+{ pname
 , withLinuxHeaders ? false
 , profilingLibraries ? false
 , withGd ? false
@@ -50,7 +50,7 @@ assert withLinuxHeaders -> linuxHeaders != null;
 assert withGd -> gd != null && libpng != null;
 
 stdenv.mkDerivation ({
-  inherit version;
+  version = version + patchSuffix;
   linuxHeaders = if withLinuxHeaders then linuxHeaders else null;
 
   inherit (stdenv) is64bit;
@@ -187,14 +187,13 @@ stdenv.mkDerivation ({
   # bootstrap.
   BASH_SHELL = "/bin/sh";
 
+  # Used by libgcc, elf-header, and others to determine ABI
   passthru = { inherit version; };
 }
 
 // (removeAttrs args [ "withLinuxHeaders" "withGd" ]) //
 
 {
-  name = name + "-${version}${patchSuffix}";
-
   src = fetchurl {
     url = "mirror://gnu/glibc/glibc-${version}.tar.xz";
     inherit sha256;
diff --git a/pkgs/development/libraries/glibc/default.nix b/pkgs/development/libraries/glibc/default.nix
index 9043c8fd0d4f3..caaacfe4f4368 100644
--- a/pkgs/development/libraries/glibc/default.nix
+++ b/pkgs/development/libraries/glibc/default.nix
@@ -14,7 +14,7 @@ let
 in
 
 callPackage ./common.nix { inherit stdenv; } {
-    name = "glibc" + lib.optionalString withGd "-gd";
+    pname = "glibc" + lib.optionalString withGd "-gd";
 
     inherit withLinuxHeaders profilingLibraries withGd;
 
diff --git a/pkgs/development/libraries/glibc/info.nix b/pkgs/development/libraries/glibc/info.nix
index 5cb004cc870db..7c4f3f63bf1c9 100644
--- a/pkgs/development/libraries/glibc/info.nix
+++ b/pkgs/development/libraries/glibc/info.nix
@@ -1,7 +1,7 @@
 { callPackage, texinfo, perl }:
 
 callPackage ./common.nix {} {
-  name = "glibc-info";
+  pname = "glibc-info";
 
   outputs = [ "out" ];
 
diff --git a/pkgs/development/libraries/glibc/locales.nix b/pkgs/development/libraries/glibc/locales.nix
index 238cebf6209f8..325e0d09936b3 100644
--- a/pkgs/development/libraries/glibc/locales.nix
+++ b/pkgs/development/libraries/glibc/locales.nix
@@ -11,7 +11,7 @@
 }:
 
 callPackage ./common.nix { inherit stdenv; } {
-  name = "glibc-locales";
+  pname = "glibc-locales";
 
   builder = ./locales-builder.sh;
 
diff --git a/pkgs/development/libraries/glibmm/2.68.nix b/pkgs/development/libraries/glibmm/2.68.nix
index 660e3b3b9bd73..db713cf9ea5f8 100644
--- a/pkgs/development/libraries/glibmm/2.68.nix
+++ b/pkgs/development/libraries/glibmm/2.68.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "glibmm";
-  version = "2.68.0";
+  version = "2.68.1";
 
   outputs = [ "out" "dev" ];
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "sha256-wfOFcxkdzu2FoFYAiIz0z0aVlB8zlxW9Z9UcJBb083U=";
+    sha256 = "sha256-ZmTifJqcyoHCnjVof0ny4NFzovyemMNCgxH3B9tTL4w=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/libraries/glibmm/default.nix b/pkgs/development/libraries/glibmm/default.nix
index 9c4488a04a97a..344fcb43eba0d 100644
--- a/pkgs/development/libraries/glibmm/default.nix
+++ b/pkgs/development/libraries/glibmm/default.nix
@@ -24,8 +24,6 @@ stdenv.mkDerivation rec {
   ]);
   propagatedBuildInputs = [ glib libsigcxx ];
 
-  enableParallelBuilding = true;
-
   doCheck = false; # fails. one test needs the net, another /etc/fstab
 
   passthru = {
diff --git a/pkgs/development/libraries/gmp/6.x.nix b/pkgs/development/libraries/gmp/6.x.nix
index bf03bf08779bb..177c15670526d 100644
--- a/pkgs/development/libraries/gmp/6.x.nix
+++ b/pkgs/development/libraries/gmp/6.x.nix
@@ -46,7 +46,7 @@ let self = stdenv.mkDerivation rec {
     # to build a .dll on windows, we need --disable-static + --enable-shared
     # see https://gmplib.org/manual/Notes-for-Particular-Systems.html
     ++ optional (!withStatic && stdenv.hostPlatform.isWindows) "--disable-static --enable-shared"
-    ;
+    ++ optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "--disable-assembly";
 
   doCheck = true; # not cross;
 
diff --git a/pkgs/development/libraries/gsl/default.nix b/pkgs/development/libraries/gsl/default.nix
index 04c8bcbbbecc6..2dc47a93be3cd 100644
--- a/pkgs/development/libraries/gsl/default.nix
+++ b/pkgs/development/libraries/gsl/default.nix
@@ -8,6 +8,10 @@ stdenv.mkDerivation rec {
     sha256 = "1a460zj9xmbgvcymkdhqh313c4l29mn9cffbi5vf33x3qygk70mp";
   };
 
+  preConfigure = if (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11" && stdenv.isDarwin) then ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '' else null;
+
   # do not let -march=skylake to enable FMA (https://lists.gnu.org/archive/html/bug-gsl/2011-11/msg00019.html)
   NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isx86_64 "-mno-fma";
 
diff --git a/pkgs/development/libraries/gtk/2.x.nix b/pkgs/development/libraries/gtk/2.x.nix
index ea112b3d33ce1..1a7cc57fbeaf9 100644
--- a/pkgs/development/libraries/gtk/2.x.nix
+++ b/pkgs/development/libraries/gtk/2.x.nix
@@ -61,6 +61,10 @@ stdenv.mkDerivation rec {
     ++ optionals cupsSupport [ cups ]
     ++ optionals stdenv.isDarwin [ AppKit Cocoa ];
 
+  preConfigure = if (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11" && stdenv.isDarwin) then ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '' else null;
+
   configureFlags = [
     "--with-gdktarget=${gdktarget}"
     "--with-xinput=yes"
diff --git a/pkgs/development/libraries/gtkmm/3.x.nix b/pkgs/development/libraries/gtkmm/3.x.nix
index 1e5932c3854e7..0f6811815f605 100644
--- a/pkgs/development/libraries/gtkmm/3.x.nix
+++ b/pkgs/development/libraries/gtkmm/3.x.nix
@@ -16,8 +16,6 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ glibmm gtk3 atkmm cairomm pangomm ];
 
-  enableParallelBuilding = true;
-
   # https://bugzilla.gnome.org/show_bug.cgi?id=764521
   doCheck = false;
 
diff --git a/pkgs/development/libraries/kde-frameworks/fetch.sh b/pkgs/development/libraries/kde-frameworks/fetch.sh
index 05506b19385ce..55c1e02a955d3 100644
--- a/pkgs/development/libraries/kde-frameworks/fetch.sh
+++ b/pkgs/development/libraries/kde-frameworks/fetch.sh
@@ -1 +1 @@
-WGET_ARGS=( https://download.kde.org/stable/frameworks/5.80/ -A '*.tar.xz' )
+WGET_ARGS=( https://download.kde.org/stable/frameworks/5.81/ -A '*.tar.xz' )
diff --git a/pkgs/development/libraries/kde-frameworks/srcs.nix b/pkgs/development/libraries/kde-frameworks/srcs.nix
index 91d53f4df87ca..3d5ad663dd32a 100644
--- a/pkgs/development/libraries/kde-frameworks/srcs.nix
+++ b/pkgs/development/libraries/kde-frameworks/srcs.nix
@@ -4,667 +4,667 @@
 
 {
   attica = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/attica-5.80.0.tar.xz";
-      sha256 = "0wffjjrk6rka25kgfq05j9fzxawysimpzi8jj3sw3kfz05mqdap3";
-      name = "attica-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/attica-5.81.0.tar.xz";
+      sha256 = "0x1ga3y0kmr2ybgvsmns7imd0agfd5bfc2lf0010ks5s1v50whqr";
+      name = "attica-5.81.0.tar.xz";
     };
   };
   baloo = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/baloo-5.80.0.tar.xz";
-      sha256 = "0wdm03x1zm31nivf04qxih6gg18c97diff7ddaqqbz8c7jlhppzc";
-      name = "baloo-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/baloo-5.81.0.tar.xz";
+      sha256 = "0mnm282mc1yph9x08fkrycb22gsah4km8r7yk3kz20vnrs0wgljy";
+      name = "baloo-5.81.0.tar.xz";
     };
   };
   bluez-qt = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/bluez-qt-5.80.0.tar.xz";
-      sha256 = "08g56gnh0gkh7n92wqama9lbqk6pfdby9xbh8f2vgmnkzy07zrwn";
-      name = "bluez-qt-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/bluez-qt-5.81.0.tar.xz";
+      sha256 = "13wy3nzbq26616s7pa0sx0jrq81v3bvf6a6dlmp1zzycvbk06jp3";
+      name = "bluez-qt-5.81.0.tar.xz";
     };
   };
   breeze-icons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/breeze-icons-5.80.0.tar.xz";
-      sha256 = "11353lgy2fh1d2fgbhg20fapsjzrpsxlf5zilrfkw8y0my690rm2";
-      name = "breeze-icons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/breeze-icons-5.81.0.tar.xz";
+      sha256 = "1844jyair0kjflfq98cakis7xfgbdn7an383f02hp4072kjg127g";
+      name = "breeze-icons-5.81.0.tar.xz";
     };
   };
   extra-cmake-modules = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/extra-cmake-modules-5.80.0.tar.xz";
-      sha256 = "0r3gr6qrgljiq7bsks54xc68x9pf7i2gm9pgjq5kslw5ys0gsw13";
-      name = "extra-cmake-modules-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/extra-cmake-modules-5.81.0.tar.xz";
+      sha256 = "10svwghxf5vhbfwz7lza7xid2n1mj6r1n1amv6c616q68fwf8msz";
+      name = "extra-cmake-modules-5.81.0.tar.xz";
     };
   };
   frameworkintegration = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/frameworkintegration-5.80.0.tar.xz";
-      sha256 = "0sk9p4wk4hsr5sg0z24rc7fxrsdbxcpm5fw66v30lhncrlf9c7c7";
-      name = "frameworkintegration-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/frameworkintegration-5.81.0.tar.xz";
+      sha256 = "0vcbm0364zwkyp33nvcl42px6i9hgnp4wl3lg913qvxv1f7pd61v";
+      name = "frameworkintegration-5.81.0.tar.xz";
     };
   };
   kactivities = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kactivities-5.80.0.tar.xz";
-      sha256 = "14im60ig074axryhgz3qw1zjqhfai1gg0hq88spabvz22r5f340s";
-      name = "kactivities-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kactivities-5.81.0.tar.xz";
+      sha256 = "0sskfpc8yfic2s8hvzf7cjk92pxd0idd0xl0azrjnn28ci5kvzvq";
+      name = "kactivities-5.81.0.tar.xz";
     };
   };
   kactivities-stats = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kactivities-stats-5.80.0.tar.xz";
-      sha256 = "1w3khp8p2a1v85s5hay3s0nznjsajaavrjx4iw2cxssxnzlvg2fn";
-      name = "kactivities-stats-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kactivities-stats-5.81.0.tar.xz";
+      sha256 = "0839g6y101qr5mr98ynfm74f554lxx7srnwm3anh7nj6zrlyxrq2";
+      name = "kactivities-stats-5.81.0.tar.xz";
     };
   };
   kapidox = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kapidox-5.80.0.tar.xz";
-      sha256 = "010jigqkw3rs04irf942cwgd9wvi7j9b5lisdcrc3w65a19q053z";
-      name = "kapidox-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kapidox-5.81.0.tar.xz";
+      sha256 = "1wq4py1djmcnqf51l52cij43qw44n5fafz00qslxjb0rdakrvzs2";
+      name = "kapidox-5.81.0.tar.xz";
     };
   };
   karchive = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/karchive-5.80.0.tar.xz";
-      sha256 = "1xaxbhbx562ybd9rqna1bh3bpbyxh02c9x9xyisw84akiibqvq7w";
-      name = "karchive-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/karchive-5.81.0.tar.xz";
+      sha256 = "1flnylyglc2jdb9lfk3dl56wzxdliaaqpg2rzrlclzj14lz3l9hy";
+      name = "karchive-5.81.0.tar.xz";
     };
   };
   kauth = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kauth-5.80.0.tar.xz";
-      sha256 = "1pcnk34b912hhhpx606ajvz9hcz6xr37g7bl002zkar9fzh7vw16";
-      name = "kauth-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kauth-5.81.0.tar.xz";
+      sha256 = "1gf93wk95x1fmi4w3ybkj7acwrv7rlz9nw7f1n4nd1w3w7pn403y";
+      name = "kauth-5.81.0.tar.xz";
     };
   };
   kbookmarks = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kbookmarks-5.80.0.tar.xz";
-      sha256 = "11imylvhw3pc46qiqz72q8rwa9igvgvd9gdchiivcrg4494k502q";
-      name = "kbookmarks-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kbookmarks-5.81.0.tar.xz";
+      sha256 = "0bqgl3vhr5lngajxz7v4l325kcyylj3d1qznaa946dcbsn2wrgzm";
+      name = "kbookmarks-5.81.0.tar.xz";
     };
   };
   kcalendarcore = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcalendarcore-5.80.0.tar.xz";
-      sha256 = "1z8js2b5zb862ngwsdd2hwi6wqhkvkhsx5akbn7f1gmjs0pfrkg5";
-      name = "kcalendarcore-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcalendarcore-5.81.0.tar.xz";
+      sha256 = "0a8m8l94cni1fv38sa9wa1mx1m7bnd7qb66wrjrhdd57cfrjij5s";
+      name = "kcalendarcore-5.81.0.tar.xz";
     };
   };
   kcmutils = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcmutils-5.80.0.tar.xz";
-      sha256 = "0ncyffl60wv5awbfazknqpysaji11xxrpicabfl0mzmwcnlb34wc";
-      name = "kcmutils-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcmutils-5.81.0.tar.xz";
+      sha256 = "15q2wvnz8s1g508jbssszzfcgssamdsp7s1vply1677ga8pcspmj";
+      name = "kcmutils-5.81.0.tar.xz";
     };
   };
   kcodecs = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcodecs-5.80.0.tar.xz";
-      sha256 = "06l8c3jwx5z43cyv7vl6yfs91a7zmy0j089x826nn2a7jr678mjg";
-      name = "kcodecs-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcodecs-5.81.0.tar.xz";
+      sha256 = "0r757k1rbz1bjk7mc0b2m0ybixai4qfidrs5wvbci971lfsaz4j3";
+      name = "kcodecs-5.81.0.tar.xz";
     };
   };
   kcompletion = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcompletion-5.80.0.tar.xz";
-      sha256 = "14v0d1w01lric532vks9akh7v7z7nf9hgpf866qyhmb236k52hpg";
-      name = "kcompletion-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcompletion-5.81.0.tar.xz";
+      sha256 = "15bw6g4ag1s0s3x6390r05i299kl279jrfajna9fxgq3fbjigb7p";
+      name = "kcompletion-5.81.0.tar.xz";
     };
   };
   kconfig = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kconfig-5.80.0.tar.xz";
-      sha256 = "1chrvpfr72bdgv6fdgrkbfbiz76jgvzsncxsc6gjvkvcdag48016";
-      name = "kconfig-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kconfig-5.81.0.tar.xz";
+      sha256 = "13xfy3mhi73na4mv0a8l75ba5c8ddnkkdssmsnxp5kj084w9xpqx";
+      name = "kconfig-5.81.0.tar.xz";
     };
   };
   kconfigwidgets = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kconfigwidgets-5.80.0.tar.xz";
-      sha256 = "12rc3l91h2snkxni70brdp8f21g19c0gabpxy7ssv614ci0fz7j7";
-      name = "kconfigwidgets-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kconfigwidgets-5.81.0.tar.xz";
+      sha256 = "1v7xxn6cd17z71cpdyw2qzfqw4vkzy96wwr1zn9dylnvl8mh4xg0";
+      name = "kconfigwidgets-5.81.0.tar.xz";
     };
   };
   kcontacts = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcontacts-5.80.0.tar.xz";
-      sha256 = "173vpxncdr9mwpksizflvipsf18pnwn500b2xzpkaaz5w84vk1yk";
-      name = "kcontacts-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcontacts-5.81.0.tar.xz";
+      sha256 = "15wkspgxqj6zh2pr3f7xqcahihbhf45qnqay1v56ry3vl42gncg4";
+      name = "kcontacts-5.81.0.tar.xz";
     };
   };
   kcoreaddons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcoreaddons-5.80.0.tar.xz";
-      sha256 = "1l9ydyvbmn2ih07jsy12snxavss7cyxyig0n65sz6gwbcxqr5qzc";
-      name = "kcoreaddons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcoreaddons-5.81.0.tar.xz";
+      sha256 = "1nzyijd8753p9n9fqfb14q30jid2k1j7cvwjqv99l5fxhwbcn35c";
+      name = "kcoreaddons-5.81.0.tar.xz";
     };
   };
   kcrash = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kcrash-5.80.0.tar.xz";
-      sha256 = "1c2b8i9qay0mdr0i16jp2167vb18r792dd88nz0in77lzccfk8v4";
-      name = "kcrash-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kcrash-5.81.0.tar.xz";
+      sha256 = "1irw9blm1xsn26mcyaimd8xnygkdpaqh9m8gpf5gpn2s19iz4f81";
+      name = "kcrash-5.81.0.tar.xz";
     };
   };
   kdav = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdav-5.80.0.tar.xz";
-      sha256 = "1cab4pppqyfqm53dhp5lm4ghijbhym77ndb0pr6crvi70kz4s101";
-      name = "kdav-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdav-5.81.0.tar.xz";
+      sha256 = "0cxiif5pb8frz0dpqx0f9j7g29iaspx13alwzvzavbmi0bwzs00b";
+      name = "kdav-5.81.0.tar.xz";
     };
   };
   kdbusaddons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdbusaddons-5.80.0.tar.xz";
-      sha256 = "1w0vpjzi37z8jaq97p9bxjdl8x4288idm4vvpzxs8lc9hwcl74hl";
-      name = "kdbusaddons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdbusaddons-5.81.0.tar.xz";
+      sha256 = "0gbrmgpd8x16zapbqbyh2ipbvysz3z07qk1fc0cmx5x84x1j7xa9";
+      name = "kdbusaddons-5.81.0.tar.xz";
     };
   };
   kdeclarative = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdeclarative-5.80.0.tar.xz";
-      sha256 = "0gcx6pqyc0izw2cdvdcscxxl4wvksb74kjiq5zimjd2z8wrblmdz";
-      name = "kdeclarative-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdeclarative-5.81.0.tar.xz";
+      sha256 = "0s6kal2ppw0vskv7baxvbqfip4hzh8s3399c1j7rahdw67nf9k3x";
+      name = "kdeclarative-5.81.0.tar.xz";
     };
   };
   kded = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kded-5.80.0.tar.xz";
-      sha256 = "0skk3zf3b6rlbvdq0fyd8swfrx3fqmppqxrglh6n5imcv5jxwms1";
-      name = "kded-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kded-5.81.0.tar.xz";
+      sha256 = "1100jrccadj50blq5wmr83wdc3ry46rn86y28dfy4h97cvn1nfsi";
+      name = "kded-5.81.0.tar.xz";
     };
   };
   kdelibs4support = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kdelibs4support-5.80.0.tar.xz";
-      sha256 = "01bd188iss14qmzm55dmsgdcs9wnwbdj0kh371achp9zqg55iqj3";
-      name = "kdelibs4support-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kdelibs4support-5.81.0.tar.xz";
+      sha256 = "1ck3i46k8sjkqgnaygy5pjqbw1np35sc6nhgxxcm7q84q3cdj536";
+      name = "kdelibs4support-5.81.0.tar.xz";
     };
   };
   kdesignerplugin = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kdesignerplugin-5.80.0.tar.xz";
-      sha256 = "1d79qg3y7ndrh6yd9sygyz5yd5ig6gp8k71mw96xijdhlf5nxqs3";
-      name = "kdesignerplugin-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kdesignerplugin-5.81.0.tar.xz";
+      sha256 = "1rgnj6bns9dnn0g53xk374knc69ajpprjhyb50ffr0dn7cfcs1s3";
+      name = "kdesignerplugin-5.81.0.tar.xz";
     };
   };
   kdesu = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdesu-5.80.0.tar.xz";
-      sha256 = "1ksad8wcnjcrb8h73klrs2601482a32x3ycpr17k9fsi8mkylicd";
-      name = "kdesu-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdesu-5.81.0.tar.xz";
+      sha256 = "176531kcvpmb4sklrqpvx4msna1radd2ki410700yvk0l2v4l2yy";
+      name = "kdesu-5.81.0.tar.xz";
     };
   };
   kdewebkit = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kdewebkit-5.80.0.tar.xz";
-      sha256 = "11q6x9w2majzh6wva4b824dxrpz53xpb3vfsi65pwh199fhfyzci";
-      name = "kdewebkit-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kdewebkit-5.81.0.tar.xz";
+      sha256 = "022dpmw8r5wkb3pr87fycrybv9j5k2wy8d39rilhjvkqk8s65277";
+      name = "kdewebkit-5.81.0.tar.xz";
     };
   };
   kdnssd = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdnssd-5.80.0.tar.xz";
-      sha256 = "0k8lk3h65ar07l54cmxhpakz1why9vbm5wg58nh16x69dkdhr8dg";
-      name = "kdnssd-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdnssd-5.81.0.tar.xz";
+      sha256 = "1hl49w55r57abnnwdf4hvyjk7566zbqa24bai3zsq24a4nnm6vii";
+      name = "kdnssd-5.81.0.tar.xz";
     };
   };
   kdoctools = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kdoctools-5.80.0.tar.xz";
-      sha256 = "10xcq0pk1sqw293f2kw52sjj6dgphv17fdax4w0yy1hjch711bhy";
-      name = "kdoctools-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kdoctools-5.81.0.tar.xz";
+      sha256 = "11qayqx47h4h1y2yqzbm8bysdd7xwb2qjmkk59jxpih7xbmpg1ir";
+      name = "kdoctools-5.81.0.tar.xz";
     };
   };
   kemoticons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kemoticons-5.80.0.tar.xz";
-      sha256 = "0jg5z6dbfprkypj35prlixgc93x65nn7zcw2fmxcqvshrnqzz2hb";
-      name = "kemoticons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kemoticons-5.81.0.tar.xz";
+      sha256 = "17zv96cfmqg9fxrgm91pn8xwp4f03644g2203c3s7iq3bh8ig3gc";
+      name = "kemoticons-5.81.0.tar.xz";
     };
   };
   kfilemetadata = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kfilemetadata-5.80.0.tar.xz";
-      sha256 = "02k0yyksyl5nn373l25m6ybxhpdyrz8g0mr16zmk12pdxh24vkbm";
-      name = "kfilemetadata-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kfilemetadata-5.81.0.tar.xz";
+      sha256 = "0cba7lsjk563ql0hw2rcjxn2khadx1rz7hx4agjb40145f7x931i";
+      name = "kfilemetadata-5.81.0.tar.xz";
     };
   };
   kglobalaccel = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kglobalaccel-5.80.0.tar.xz";
-      sha256 = "015x173b57vdd16mmd4asz6l6bxw94k1hbkxr09v5cb463cspw1n";
-      name = "kglobalaccel-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kglobalaccel-5.81.0.tar.xz";
+      sha256 = "0adqlfmpfsbbfjiljvbyi4f4blx77qp18anx7npkwh5gjn32hczz";
+      name = "kglobalaccel-5.81.0.tar.xz";
     };
   };
   kguiaddons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kguiaddons-5.80.0.tar.xz";
-      sha256 = "1iadzp794q9qhs1kcvfp2g2w6rv2ifqcb3n8sv460fhv4qrg4qz5";
-      name = "kguiaddons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kguiaddons-5.81.0.tar.xz";
+      sha256 = "1q9yrbbsjh98xl3k4yss5h39fd8nz8y5v9sd7vqjmy49mqsyxxz3";
+      name = "kguiaddons-5.81.0.tar.xz";
     };
   };
   kholidays = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kholidays-5.80.0.tar.xz";
-      sha256 = "1knmsz1rzhz5a56q9s0i4747633dq9bhs4j8j6rnk49ccl5hz72z";
-      name = "kholidays-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kholidays-5.81.0.tar.xz";
+      sha256 = "1pcqzwpmyl6jp9w4xvlgj81iyzbazz2kd07g82cjybz0z3jcxs2c";
+      name = "kholidays-5.81.0.tar.xz";
     };
   };
   khtml = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/khtml-5.80.0.tar.xz";
-      sha256 = "188j1ssw9qlylqgj06iy2r2jbibzshxcxh9qbn1bgz6d2dq2c6mx";
-      name = "khtml-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/khtml-5.81.0.tar.xz";
+      sha256 = "0ag23xwl2f9hiwxnwxvwiz3xr07dxpin49li3q98vqq1qzaj1ngp";
+      name = "khtml-5.81.0.tar.xz";
     };
   };
   ki18n = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/ki18n-5.80.0.tar.xz";
-      sha256 = "0yksjrcq5zip17kq1r97z2145qzzz6k48vz71y6195f7wvbpjfl8";
-      name = "ki18n-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/ki18n-5.81.0.tar.xz";
+      sha256 = "12m7ddyzw80y9y5gqyr7jgdyc5a0fmxa8zzsd41l7418i2sdajrc";
+      name = "ki18n-5.81.0.tar.xz";
     };
   };
   kiconthemes = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kiconthemes-5.80.0.tar.xz";
-      sha256 = "133nv4zgqg6pkkvh1nyqcra847vgn3ai6w0xvynbgrmq7wvdrwlj";
-      name = "kiconthemes-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kiconthemes-5.81.0.tar.xz";
+      sha256 = "053a7zdig796zc3rnwdlkscylg6wldn1dk0dxqzn14cb8vkbwizw";
+      name = "kiconthemes-5.81.0.tar.xz";
     };
   };
   kidletime = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kidletime-5.80.0.tar.xz";
-      sha256 = "1yjjhpkql8s7b4ddzirpyq5p0yicpsbkgbq15257k60xs66qgf83";
-      name = "kidletime-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kidletime-5.81.0.tar.xz";
+      sha256 = "12zrd9k27hx8ncywd9ahhbcv5xrn7rrw82pcvdkjmyniz0nazrqv";
+      name = "kidletime-5.81.0.tar.xz";
     };
   };
   kimageformats = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kimageformats-5.80.0.tar.xz";
-      sha256 = "0q3i6jkx6kahgdzfycygki50f22zjbspx3f9ibg2ak74hcan8r8x";
-      name = "kimageformats-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kimageformats-5.81.0.tar.xz";
+      sha256 = "0kl68dy1v4p403f52y7igv2w3wq6q2pb7n0r7fbnwz2113bs0cm3";
+      name = "kimageformats-5.81.0.tar.xz";
     };
   };
   kinit = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kinit-5.80.0.tar.xz";
-      sha256 = "101lvky2j6bxk3q36040kczchc21d5rb664ddxd89pl2n0f6s9fz";
-      name = "kinit-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kinit-5.81.0.tar.xz";
+      sha256 = "1wv8qyv4mayi80vczf47mdxxa6km4v7r2kz2j483w53nck5hjz4j";
+      name = "kinit-5.81.0.tar.xz";
     };
   };
   kio = {
-    version = "5.80.1";
+    version = "5.81.0";
     src = fetchurl {
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-      sha256 = "0a2srmj8w80f2m8s359747xx0wg2gf8nd75ysv9f9y92l1hwwwfr";
-      name = "kio-5.80.1.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kio-5.81.0.tar.xz";
+      sha256 = "0zn0xh07hajcj3h1v5246a167ffm113k8j36p2xn7lbq368sway6";
+      name = "kio-5.81.0.tar.xz";
     };
   };
   kirigami2 = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kirigami2-5.80.0.tar.xz";
-      sha256 = "0wljcyr0g4i5nsc6szy9yd976l180lxfjjzhz24py7czlrpzg3i2";
-      name = "kirigami2-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kirigami2-5.81.0.tar.xz";
+      sha256 = "1bcc2mfb2s4w67q9q35k04mc9154dx1x03vqzclh9ipzdvyjqmyn";
+      name = "kirigami2-5.81.0.tar.xz";
     };
   };
   kitemmodels = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kitemmodels-5.80.0.tar.xz";
-      sha256 = "1bvghm4accgf273aacjng86rxiazmk05pbrnqkldda9958dqv54k";
-      name = "kitemmodels-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kitemmodels-5.81.0.tar.xz";
+      sha256 = "0vs75q08x9yi1953rihk3y234wcsjawdxb3g5xb597f961y634w0";
+      name = "kitemmodels-5.81.0.tar.xz";
     };
   };
   kitemviews = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kitemviews-5.80.0.tar.xz";
-      sha256 = "1j9m4qcmy83dj3k3v4y4skl5lgb8n3z4x9pa1f0rjpwwg4qsa0lp";
-      name = "kitemviews-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kitemviews-5.81.0.tar.xz";
+      sha256 = "0nmhc675bmilqah9fwwzy4p8rksib90cv8iihxd5c9d9snykk01n";
+      name = "kitemviews-5.81.0.tar.xz";
     };
   };
   kjobwidgets = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kjobwidgets-5.80.0.tar.xz";
-      sha256 = "1yy5n9jnj1sdh51n3n1bqzmaml44799kiqdpp3b7mq55fmj9najp";
-      name = "kjobwidgets-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kjobwidgets-5.81.0.tar.xz";
+      sha256 = "1gl8ia858jbmj2i9wp4x0mw27p42xm6mg84nj1a8yvvvbazs3hpa";
+      name = "kjobwidgets-5.81.0.tar.xz";
     };
   };
   kjs = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kjs-5.80.0.tar.xz";
-      sha256 = "1v3jiywzzi20c0pd67pgnwwnz0vg209a0wzzdhrpiz5v7qgji1ij";
-      name = "kjs-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kjs-5.81.0.tar.xz";
+      sha256 = "049aplmp1nlxshwaw0lfhfr09aazxh4vazvb78429gs84j8ir9xr";
+      name = "kjs-5.81.0.tar.xz";
     };
   };
   kjsembed = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kjsembed-5.80.0.tar.xz";
-      sha256 = "083gp9ks7yha90vnk0z4bkb9i4rphz90di8m8z19xgn575a6li57";
-      name = "kjsembed-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kjsembed-5.81.0.tar.xz";
+      sha256 = "0zkazfcrmd0gklzda0hbb4mc493ihsd3dafnmyj6cmgk4lz2w3q9";
+      name = "kjsembed-5.81.0.tar.xz";
     };
   };
   kmediaplayer = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kmediaplayer-5.80.0.tar.xz";
-      sha256 = "0a16rzyjy7j5pn66ahpj3kxpp5c2zmjxg3cmrm14gcm6gzysv56b";
-      name = "kmediaplayer-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kmediaplayer-5.81.0.tar.xz";
+      sha256 = "0z1ji717kwq84i6b2ay9wjhgc4vdkgn1jvwpzgpc1hqs9zly278b";
+      name = "kmediaplayer-5.81.0.tar.xz";
     };
   };
   knewstuff = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/knewstuff-5.80.0.tar.xz";
-      sha256 = "0pbk4j823zs2xikgdhaxqilb5b6f0a8k8hylq1vyhkwlzvvp9s6z";
-      name = "knewstuff-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/knewstuff-5.81.0.tar.xz";
+      sha256 = "0wmf86nndnxs1850bjzbwaag6kjdabz0si7b0p1r6hnwm2km9bnk";
+      name = "knewstuff-5.81.0.tar.xz";
     };
   };
   knotifications = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/knotifications-5.80.0.tar.xz";
-      sha256 = "1sfn61vhdqg3mxfvb802wx0l0k59b312fbh6w9bqv0b8z0a9jz2s";
-      name = "knotifications-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/knotifications-5.81.0.tar.xz";
+      sha256 = "04yfrhd098asr45swslnfkzxkb9892izvyam5rf0h93pw78ggmqs";
+      name = "knotifications-5.81.0.tar.xz";
     };
   };
   knotifyconfig = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/knotifyconfig-5.80.0.tar.xz";
-      sha256 = "0b41ppif2qp7lkqmb7nv1r68hvavdl1lcgs4w50v2c0k4fflwizx";
-      name = "knotifyconfig-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/knotifyconfig-5.81.0.tar.xz";
+      sha256 = "0xrd9771g1x0s796pw6wkhl9jj9607pffmlxrj171c8n8hdfyjbs";
+      name = "knotifyconfig-5.81.0.tar.xz";
     };
   };
   kpackage = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kpackage-5.80.0.tar.xz";
-      sha256 = "104qwyai3ivdw0jqgn6m59bajy07snas51rp75xgvb65hpllv2ch";
-      name = "kpackage-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kpackage-5.81.0.tar.xz";
+      sha256 = "1r1yv5y2swll38l88w559d8q0n4xizwgjp4qd8bh0vvsn24l65ka";
+      name = "kpackage-5.81.0.tar.xz";
     };
   };
   kparts = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kparts-5.80.0.tar.xz";
-      sha256 = "1fkfjazr7bwh5nniylh403qp0g4bgiv01ckv4djf46gjf7qn9d4y";
-      name = "kparts-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kparts-5.81.0.tar.xz";
+      sha256 = "1gjqmwg5pjj41vwfsdffvr1gfbkbm12f77rlyfn9gg4z6bjdx47b";
+      name = "kparts-5.81.0.tar.xz";
     };
   };
   kpeople = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kpeople-5.80.0.tar.xz";
-      sha256 = "1cn9jqiah3j0qi7sg1j9c10yq97pcisvxhm9jjzzzxna39zz16cw";
-      name = "kpeople-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kpeople-5.81.0.tar.xz";
+      sha256 = "1a63s8c946wrivqs8n680jpmcys8iafyy9j3isl4z5n88df2nnih";
+      name = "kpeople-5.81.0.tar.xz";
     };
   };
   kplotting = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
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-      sha256 = "073icgz0cgg7wis3rf1hlsmxklp9vk8swgihfdlks1jds90s4nxw";
-      name = "kplotting-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kplotting-5.81.0.tar.xz";
+      sha256 = "1s368amqfqjmr99bz4xc0xfm2sf29s99z3zpwbx2lbjvqh3p5yyb";
+      name = "kplotting-5.81.0.tar.xz";
     };
   };
   kpty = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kpty-5.80.0.tar.xz";
-      sha256 = "13blnrzni3n9p3xnn2kyd6g2hlpvvg0aqagknk64kchbvdkd5l4k";
-      name = "kpty-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kpty-5.81.0.tar.xz";
+      sha256 = "0la3jpkki1hskxg12nf3r59fw7r9q8n3sc7wcdik9r9c9rhlyjpk";
+      name = "kpty-5.81.0.tar.xz";
     };
   };
   kquickcharts = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kquickcharts-5.80.0.tar.xz";
-      sha256 = "0kf72i9pkifcwg9njn296fw4d9gy3rc43g17128axj6a5jrd4bln";
-      name = "kquickcharts-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kquickcharts-5.81.0.tar.xz";
+      sha256 = "00w2m0pwilldip873w97l9hvgm6gfy1aj6blyzcxn7x1688lv1jz";
+      name = "kquickcharts-5.81.0.tar.xz";
     };
   };
   kross = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kross-5.80.0.tar.xz";
-      sha256 = "06dyqmhxbr9ykca1bskkgxmsd86jpxnk4adygcw1j84xsl6jiki9";
-      name = "kross-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kross-5.81.0.tar.xz";
+      sha256 = "02jsyarn7ihv547b3vv5xwjm1bs58x5lhdnb74v02cwsgb82wlm3";
+      name = "kross-5.81.0.tar.xz";
     };
   };
   krunner = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/krunner-5.80.0.tar.xz";
-      sha256 = "0bid6h0wmvmxfz664hmfhs4zp35mlk3n1p553rspfs55wh2f9xpw";
-      name = "krunner-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/krunner-5.81.0.tar.xz";
+      sha256 = "1yf04qw82hmz8g9hddyalh73b2dxk492n8g856d5m6ccq89c7ga5";
+      name = "krunner-5.81.0.tar.xz";
     };
   };
   kservice = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kservice-5.80.0.tar.xz";
-      sha256 = "06bk46l3qg7dh57zsg9vwx8vq31ikjmbmy4nqn65mq786yiz4s78";
-      name = "kservice-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kservice-5.81.0.tar.xz";
+      sha256 = "1kb6wz8d879b57hpfi4ybpc9d3r67b205xdjmp3bhz21894haszc";
+      name = "kservice-5.81.0.tar.xz";
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   ktexteditor = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
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-      sha256 = "0g073m18bpzhxdwzhqcyclsclwi91cqsjqq3fjz1hy56ird6b0d0";
-      name = "ktexteditor-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/ktexteditor-5.81.0.tar.xz";
+      sha256 = "1pbxkkqzk4l8n9am5r6w2s1smqwwcc2wagy9in0k80gbyszp9rvm";
+      name = "ktexteditor-5.81.0.tar.xz";
     };
   };
   ktextwidgets = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/ktextwidgets-5.80.0.tar.xz";
-      sha256 = "1292knr3wblbk5j3qfzr1lqyiaa09pkhvkmh3jnlb0jvhc8xvmg8";
-      name = "ktextwidgets-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/ktextwidgets-5.81.0.tar.xz";
+      sha256 = "04mn22xmhkxqb138b9wf6jxz39dfp8rigdg3pzr5llx6gmrln9y8";
+      name = "ktextwidgets-5.81.0.tar.xz";
     };
   };
   kunitconversion = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kunitconversion-5.80.0.tar.xz";
-      sha256 = "1hckj3k3jjsc4y89zvi5l9h6px6ns9kdqjrfkxbax459wha55b4l";
-      name = "kunitconversion-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kunitconversion-5.81.0.tar.xz";
+      sha256 = "1g9i253f3qjpcmfiy12zmbi41gld9fxy89d742b44xc88fhj3z1y";
+      name = "kunitconversion-5.81.0.tar.xz";
     };
   };
   kwallet = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kwallet-5.80.0.tar.xz";
-      sha256 = "1pwrxhjxxdx7hl4456dk4x8z36ddw932cv08010fmz9m4w0yvjg1";
-      name = "kwallet-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kwallet-5.81.0.tar.xz";
+      sha256 = "1i05j20847bb9b7348f85fln6spqnkp3c9ysr7yvnm8wfyzrd1gz";
+      name = "kwallet-5.81.0.tar.xz";
     };
   };
   kwayland = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kwayland-5.80.0.tar.xz";
-      sha256 = "1avr7ckyhw158wi5mlknzkcphn8vlf8dpb96gyizvsvg8b4gffs0";
-      name = "kwayland-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kwayland-5.81.0.tar.xz";
+      sha256 = "1a23zcf6aax1fyq4d6y88flyap8wwkbwnq4vkbybpbnxnkbwl8ny";
+      name = "kwayland-5.81.0.tar.xz";
     };
   };
   kwidgetsaddons = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kwidgetsaddons-5.80.0.tar.xz";
-      sha256 = "1wgwl08cxwzcd0nikvp2ph2dbj5fij6a5l65p9amvi6ladbgv6qs";
-      name = "kwidgetsaddons-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kwidgetsaddons-5.81.0.tar.xz";
+      sha256 = "0hmnlda1hgk6zwx6wnjzqc0b2awv835736sjyczrxcfaxlkfj99g";
+      name = "kwidgetsaddons-5.81.0.tar.xz";
     };
   };
   kwindowsystem = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kwindowsystem-5.80.0.tar.xz";
-      sha256 = "1ch44w27ilh994if3icskyqg6nhnbd5j430jxfj6fzfia9vvclmk";
-      name = "kwindowsystem-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kwindowsystem-5.81.0.tar.xz";
+      sha256 = "11ma5vhq8z570danzq9vdwwcq5n6drsm9m3rpvc1vd3kn2mslls7";
+      name = "kwindowsystem-5.81.0.tar.xz";
     };
   };
   kxmlgui = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/kxmlgui-5.80.0.tar.xz";
-      sha256 = "17dpcv2igkg1pk238bd396mn83nqp325sscx7qsf8cbj15dp7bw1";
-      name = "kxmlgui-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/kxmlgui-5.81.0.tar.xz";
+      sha256 = "1l3a9qzc1x1ai2g1g551w05n2jxshxr03rcy0n8m8lbf518288yv";
+      name = "kxmlgui-5.81.0.tar.xz";
     };
   };
   kxmlrpcclient = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/portingAids/kxmlrpcclient-5.80.0.tar.xz";
-      sha256 = "0aas26kjxsbgrrrazjvsvjqdr9993v2hyxci62mfpi7xsp5js4h4";
-      name = "kxmlrpcclient-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/portingAids/kxmlrpcclient-5.81.0.tar.xz";
+      sha256 = "15q3w6wdn5ynhyv5244irq51qbm66bl7799zfs964c0y6dmmm3hg";
+      name = "kxmlrpcclient-5.81.0.tar.xz";
     };
   };
   modemmanager-qt = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/modemmanager-qt-5.80.0.tar.xz";
-      sha256 = "1q14hx2228xhlggw14r9mhmnn2q3qvy3nc9hq5ynb9mwldns6nl6";
-      name = "modemmanager-qt-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/modemmanager-qt-5.81.0.tar.xz";
+      sha256 = "01rr4j09xqsja7h699yk58xif7qrlbszd0mim4cncy7pkgwn43h6";
+      name = "modemmanager-qt-5.81.0.tar.xz";
     };
   };
   networkmanager-qt = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/networkmanager-qt-5.80.0.tar.xz";
-      sha256 = "1wdzn2n4m7nz6skjc37p70zaq42ighk5f1wg1hjx3yf3rlpprnp0";
-      name = "networkmanager-qt-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/networkmanager-qt-5.81.0.tar.xz";
+      sha256 = "1j26ja4r6ry7134yh8i6rkf6dy6kapnrjap9476mr78ig0d6r2if";
+      name = "networkmanager-qt-5.81.0.tar.xz";
     };
   };
   oxygen-icons5 = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/oxygen-icons5-5.80.0.tar.xz";
-      sha256 = "0kmq993vd6011qny949z13lli4qymprk616kl1628dazniapka9m";
-      name = "oxygen-icons5-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/oxygen-icons5-5.81.0.tar.xz";
+      sha256 = "1s0gvicrfw6dl164cccj05rfhp627mqa9ml0j4dvgvknnrgip6hz";
+      name = "oxygen-icons5-5.81.0.tar.xz";
     };
   };
   plasma-framework = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/plasma-framework-5.80.0.tar.xz";
-      sha256 = "1nckb1801fy64hvm127r5fz14vgw81szw7w7miilqh6651v0zbyk";
-      name = "plasma-framework-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/plasma-framework-5.81.0.tar.xz";
+      sha256 = "0g36a632kafsvhamk33w46cafg1gyir3kkx12fkhyqll2vlpn0v7";
+      name = "plasma-framework-5.81.0.tar.xz";
     };
   };
   prison = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/prison-5.80.0.tar.xz";
-      sha256 = "1fcsvww08f7ihxq6x84jd2klp29m8hrbzp7rxqi7x9ghxxgysbpz";
-      name = "prison-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/prison-5.81.0.tar.xz";
+      sha256 = "1mrrwhg98br4r9g7lj6gn3w1z2gfh9kr7ycispssjalyp6bdf4yg";
+      name = "prison-5.81.0.tar.xz";
     };
   };
   purpose = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/purpose-5.80.0.tar.xz";
-      sha256 = "107xmhbjcw5mk068484gwqrzl2gkgy495737f4vj5q22m9rpal5d";
-      name = "purpose-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/purpose-5.81.0.tar.xz";
+      sha256 = "0188wxxy6rg6sm722db02nzhmlv3c540zs2qh6h9fbbf1k4h82jf";
+      name = "purpose-5.81.0.tar.xz";
     };
   };
   qqc2-desktop-style = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/qqc2-desktop-style-5.80.0.tar.xz";
-      sha256 = "14dy7n6m9vdq6v7h3r0w71vw86yxyza40wyxp0hhj44nb63fvczg";
-      name = "qqc2-desktop-style-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/qqc2-desktop-style-5.81.0.tar.xz";
+      sha256 = "1ac4jc6yi6fwndyivc11brlaz3sncxyxzwrfdak8gg579z67zjx5";
+      name = "qqc2-desktop-style-5.81.0.tar.xz";
     };
   };
   solid = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/solid-5.80.0.tar.xz";
-      sha256 = "023zk7la6ycd7h2j62z7b409w94sq2r9k0c020ywry6psjydqkx5";
-      name = "solid-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/solid-5.81.0.tar.xz";
+      sha256 = "0w144jdhspjgqpv0xyxr6l6bnh2bazn9jfbw5iim8fj4q5dyr6c1";
+      name = "solid-5.81.0.tar.xz";
     };
   };
   sonnet = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/sonnet-5.80.0.tar.xz";
-      sha256 = "13kqdfy6bgmqjfw82d2zh0bq4r53awa1f1cbshci6inwdslyvlmh";
-      name = "sonnet-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/sonnet-5.81.0.tar.xz";
+      sha256 = "0kin6xngk4bxxn7y06q1pm0vk5s66gh6riv58l051px27m6lwz2a";
+      name = "sonnet-5.81.0.tar.xz";
     };
   };
   syndication = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/syndication-5.80.0.tar.xz";
-      sha256 = "1j22yx2i2qxck6gy4jypjvmar4y93j5nmrmf7fkjx7z8hwxjgwhh";
-      name = "syndication-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/syndication-5.81.0.tar.xz";
+      sha256 = "1fxdhnd8kl0q13434vbkmjan9dakhn9bdrad9d4vd3x11c77ggkn";
+      name = "syndication-5.81.0.tar.xz";
     };
   };
   syntax-highlighting = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/syntax-highlighting-5.80.0.tar.xz";
-      sha256 = "060jnfri24rzkryyvxadpr3yn5xn0856j01ba5l38w0khs8mix4i";
-      name = "syntax-highlighting-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/syntax-highlighting-5.81.0.tar.xz";
+      sha256 = "0paazw8y8kdvwg2waa45az5qgyxi2w5nkfbjg84v1is7yhb065yb";
+      name = "syntax-highlighting-5.81.0.tar.xz";
     };
   };
   threadweaver = {
-    version = "5.80.0";
+    version = "5.81.0";
     src = fetchurl {
-      url = "${mirror}/stable/frameworks/5.80/threadweaver-5.80.0.tar.xz";
-      sha256 = "1j5m8gfjpi9cajhja77lhkrl3shq618wpza1k27azvi7r6jj4dva";
-      name = "threadweaver-5.80.0.tar.xz";
+      url = "${mirror}/stable/frameworks/5.81/threadweaver-5.81.0.tar.xz";
+      sha256 = "03mz4zibvmriaa9qxvqsnp3ahjnhylzjj80w5c6nc4jjywmi89af";
+      name = "threadweaver-5.81.0.tar.xz";
     };
   };
 }
diff --git a/pkgs/development/libraries/libevent/default.nix b/pkgs/development/libraries/libevent/default.nix
index b33e94114f639..24ded54d8e973 100644
--- a/pkgs/development/libraries/libevent/default.nix
+++ b/pkgs/development/libraries/libevent/default.nix
@@ -13,6 +13,10 @@ stdenv.mkDerivation rec {
     sha256 = "1fq30imk8zd26x8066di3kpc5zyfc5z6frr3zll685zcx4dxxrlj";
   };
 
+  preConfigure = lib.optionalString (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '';
+
   # libevent_openssl is moved into its own output, so that openssl isn't present
   # in the default closure.
   outputs = [ "out" "dev" ]
diff --git a/pkgs/development/libraries/libical/default.nix b/pkgs/development/libraries/libical/default.nix
index d7eb085df7f21..909ee73e69a6d 100644
--- a/pkgs/development/libraries/libical/default.nix
+++ b/pkgs/development/libraries/libical/default.nix
@@ -20,7 +20,7 @@
 
 stdenv.mkDerivation rec {
   pname = "libical";
-  version = "3.0.9";
+  version = "3.0.10";
 
   outputs = [ "out" "dev" ]; # "devdoc" ];
 
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     owner = "libical";
     repo = "libical";
     rev = "v${version}";
-    sha256 = "sha256-efdiGktLGITaQ6VinnfYG52fMhO0Av+JKROt2kTvS1U=";
+    sha256 = "sha256-fLmEJlkZLYLcKZqZwitf8rH261QDPTJZf/+/+FMsGIg=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/libraries/libidn2/default.nix b/pkgs/development/libraries/libidn2/default.nix
index 30a3342663953..b1d234476c4b3 100644
--- a/pkgs/development/libraries/libidn2/default.nix
+++ b/pkgs/development/libraries/libidn2/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, lib, stdenv, libiconv, libunistring, help2man, buildPackages }:
+{ fetchurl, lib, stdenv, libiconv, libunistring, help2man, texinfo, buildPackages }:
 
 # Note: this package is used for bootstrapping fetchurl, and thus
 # cannot use fetchpatch! All mutable patches (generated by GitHub or
@@ -9,18 +9,20 @@ with lib;
 
 stdenv.mkDerivation rec {
   pname = "libidn2";
-  version = "2.3.0";
+  version = "2.3.1";
 
   src = fetchurl {
     url = "mirror://gnu/gnu/libidn/${pname}-${version}.tar.gz";
-    sha256 = "1ddqr80kmz4l8g3r3gf7bmf2v29fgivlc2bgxfiscjg2sarivjz1";
+    sha256 = "sha256-ivaElDg2uLU5ZdX1tnFO8TwmyR6qNs59JC49IfXUDy0=";
   };
 
   outputs = [ "bin" "dev" "out" "info" "devdoc" ];
 
   patches = optional stdenv.isDarwin ./fix-error-darwin.patch;
 
-  nativeBuildInputs = optional stdenv.isDarwin help2man;
+  # The above patch causes the documentation to be regenerated, so the
+  # documentation tools are required.
+  nativeBuildInputs = optionals stdenv.isDarwin [ help2man texinfo ];
   buildInputs = [ libunistring ] ++ optional stdenv.isDarwin libiconv;
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
diff --git a/pkgs/development/libraries/liblinphone/default.nix b/pkgs/development/libraries/liblinphone/default.nix
index b19b6189f2d69..8a38aa36c097b 100644
--- a/pkgs/development/libraries/liblinphone/default.nix
+++ b/pkgs/development/libraries/liblinphone/default.nix
@@ -46,7 +46,7 @@
 
 stdenv.mkDerivation rec {
   pname = "liblinphone";
-  version = "4.5.15";
+  version = "4.5.17";
 
   src = fetchFromGitLab {
     domain = "gitlab.linphone.org";
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     group = "BC";
     repo = pname;
     rev = version;
-    sha256 = "sha256-lDj2OkWuodPHpvoJ5W2GivzVIeMnprb42kAnJKfKtdg=";
+    sha256 = "sha256-ryyT4bG3lnE72ydvCAoiT3IeHY4mZwX9nCqaTRC1wyc=";
   };
 
   # Do not build static libraries
diff --git a/pkgs/development/libraries/libsoup/default.nix b/pkgs/development/libraries/libsoup/default.nix
index fc805b2db9ec4..960591d1a22d6 100644
--- a/pkgs/development/libraries/libsoup/default.nix
+++ b/pkgs/development/libraries/libsoup/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, glib, libxml2, meson, ninja, pkg-config, gnome, libsysprof-capture
+{ stdenv, lib, fetchurl, fetchpatch, glib, libxml2, meson, ninja, pkg-config, gnome, libsysprof-capture
 , gnomeSupport ? true, sqlite, glib-networking, gobject-introspection, vala
 , libpsl, python3, brotli
 }:
@@ -12,6 +12,14 @@ stdenv.mkDerivation rec {
     sha256 = "11skbyw2pw32178q3h8pi7xqa41b2x4k6q4k9f75zxmh8s23y30p";
   };
 
+  patches = [
+    (fetchpatch {
+      # https://gitlab.gnome.org/GNOME/libsoup/-/issues/222
+      url = "https://gitlab.gnome.org/GNOME/libsoup/commit/b5e4f15a09d197b6a9b4b2d78b33779f27d828af.patch";
+      sha256 = "1hqk8lqzc200hi0nwbwq9qm6f03z296cnd79d4ql30683s80xqws";
+    })
+  ];
+
   postPatch = ''
     patchShebangs libsoup/
   '';
diff --git a/pkgs/development/libraries/libspnav/configure-socket-path.patch b/pkgs/development/libraries/libspnav/configure-socket-path.patch
new file mode 100644
index 0000000000000..9a8ef0d498115
--- /dev/null
+++ b/pkgs/development/libraries/libspnav/configure-socket-path.patch
@@ -0,0 +1,47 @@
+diff --git a/spnav.c b/spnav.c
+index f9e10f8..27149f7 100644
+--- a/spnav.c
++++ b/spnav.c
+@@ -36,7 +36,7 @@ OF SUCH DAMAGE.
+ #include <sys/select.h>
+ #include "spnav.h"
+ 
+-#define SPNAV_SOCK_PATH "/var/run/spnav.sock"
++#define DEFAULT_SPNAV_SOCK_PATH "/run/spnav.sock"
+ 
+ #ifdef USE_X11
+ #include <X11/Xlib.h>
+@@ -70,6 +70,24 @@ static struct event_node *ev_queue, *ev_queue_tail;
+ /* AF_UNIX socket used for alternative communication with daemon */
+ static int sock = -1;
+ 
++static char *spath = NULL;
++
++static char *socket_path()
++{
++	char *xdg_runtime_dir;
++	if((xdg_runtime_dir = getenv("XDG_RUNTIME_DIR"))) {
++		if ( spath == NULL ) {
++			spath = malloc(strlen(xdg_runtime_dir) + strlen("/spnav.sock") + 1);
++			if ( spath != NULL ) {
++				sprintf(spath, "%s/spnav.sock", xdg_runtime_dir);
++			}
++		}
++		if(access(spath, F_OK) != -1){
++			return spath;
++		}
++	}
++	return DEFAULT_SPNAV_SOCK_PATH;
++}
+ 
+ int spnav_open(void)
+ {
+@@ -92,7 +110,7 @@ int spnav_open(void)
+ 
+ 	memset(&addr, 0, sizeof addr);
+ 	addr.sun_family = AF_UNIX;
+-	strncpy(addr.sun_path, SPNAV_SOCK_PATH, sizeof(addr.sun_path));
++	strncpy(addr.sun_path, socket_path(), sizeof(addr.sun_path));
+ 
+ 
+ 	if(connect(s, (struct sockaddr*)&addr, sizeof addr) == -1) {
diff --git a/pkgs/development/libraries/libspnav/default.nix b/pkgs/development/libraries/libspnav/default.nix
index 53aad1019b302..99f2a64d7b12e 100644
--- a/pkgs/development/libraries/libspnav/default.nix
+++ b/pkgs/development/libraries/libspnav/default.nix
@@ -14,6 +14,12 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
   buildInputs = [ libX11 ];
 
+  patches = [
+    # Changes the socket path from /run/spnav.sock to $XDG_RUNTIME_DIR/spnav.sock
+    # to allow for a user service
+    ./configure-socket-path.patch
+  ];
+
   configureFlags = [ "--disable-debug"];
   makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index 30a65e3a0a361..ca3cbc4a18840 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -1,18 +1,18 @@
-{ stdenv, lib, fetchurl, fetchpatch
+{ stdenv, lib, fetchurl
 , zlib, xz, libintl, python, gettext, ncurses, findXMLCatalogs
 , pythonSupport ? enableShared && stdenv.buildPlatform == stdenv.hostPlatform
 , icuSupport ? false, icu ? null
 , enableShared ? stdenv.hostPlatform.libc != "msvcrt"
-, enableStatic ? !enableShared,
+, enableStatic ? !enableShared
 }:
 
 stdenv.mkDerivation rec {
   pname = "libxml2";
-  version = "2.9.10";
+  version = "2.9.12";
 
   src = fetchurl {
     url = "http://xmlsoft.org/sources/${pname}-${version}.tar.gz";
-    sha256 = "07xynh8hcxb2yb1fs051xrgszjvj37wnxvxgsj10rzmqzy9y3zma";
+    sha256 = "14hxwzmf5xqppx77z7i0ni9lpzg1a84dqpf8j8l1fvy570g6imn8";
   };
   patches = [
     # Upstream bugs:
@@ -27,28 +27,6 @@ stdenv.mkDerivation rec {
     #   https://github.com/NixOS/nixpkgs/pull/63174
     #   https://github.com/NixOS/nixpkgs/pull/72342
     ./utf8-xmlErrorFuncHandler.patch
-    (fetchpatch {
-      name = "CVE-2019-20388.patch";
-      url = "https://gitlab.gnome.org/GNOME/libxml2/commit/6088a74bcf7d0c42e24cff4594d804e1d3c9fbca.patch";
-      sha256 = "070s7al2r2k92320h9cdfc2097jy4kk04d0disc98ddc165r80jl";
-    })
-    (fetchpatch {
-      name = "CVE-2020-7595.patch";
-      url = "https://gitlab.gnome.org/GNOME/libxml2/commit/0e1a49c8907645d2e155f0d89d4d9895ac5112b5.patch";
-      sha256 = "0klvaxkzakkpyq0m44l9xrpn5kwaii194sqsivfm6zhnb9hhl15l";
-    })
-    (fetchpatch {
-      name = "CVE-2020-24977.patch";
-      url = "https://gitlab.gnome.org/GNOME/libxml2/commit/50f06b3efb638efb0abd95dc62dca05ae67882c2.patch";
-      sha256 = "093f1ic5qfiq8nk9mc6b8p1qcs8m9hir3ardr6r5il4zi2dnjrj4";
-    })
-    # Fix compatibility with Python 3.9.
-    # https://gitlab.gnome.org/GNOME/libxml2/-/issues/149
-    (fetchpatch {
-      name = "python39.patch";
-      url = "https://gitlab.gnome.org/nwellnhof/libxml2/-/commit/e4fb36841800038c289997432ca547c9bfef9db1.patch";
-      sha256 = "0h3vpy9fg3339b14qa64640ypp65z3hrrrmpjl8qm72srkp24ci5";
-    })
   ];
 
   outputs = [ "bin" "dev" "out" "man" "doc" ]
@@ -75,6 +53,10 @@ stdenv.mkDerivation rec {
     (lib.withFeatureAs pythonSupport "python" python)
   ];
 
+  preConfigure = lib.optionalString (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '';
+
   enableParallelBuilding = true;
 
   # disable test that's problematic with newer pythons: see
diff --git a/pkgs/development/libraries/libxslt/default.nix b/pkgs/development/libraries/libxslt/default.nix
index 650e17d3179d2..eb23e16d653ad 100644
--- a/pkgs/development/libraries/libxslt/default.nix
+++ b/pkgs/development/libraries/libxslt/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchurl, fetchpatch, libxml2, findXMLCatalogs, gettext, python3, libgcrypt
+{ lib, stdenv, fetchurl
+, pkg-config
+, libxml2, findXMLCatalogs, gettext, python3, libgcrypt
 , cryptoSupport ? false
 , pythonSupport ? stdenv.buildPlatform == stdenv.hostPlatform
 }:
@@ -14,6 +16,10 @@ stdenv.mkDerivation rec {
 
   outputs = [ "bin" "dev" "out" "man" "doc" ] ++ lib.optional pythonSupport "py";
 
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
   buildInputs = [ libxml2.dev ]
     ++ lib.optional stdenv.isDarwin gettext
     ++ lib.optionals pythonSupport [ libxml2.py python3 ]
@@ -22,7 +28,6 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ findXMLCatalogs ];
 
   configureFlags = [
-    "--with-libxml-prefix=${libxml2.dev}"
     "--without-debug"
     "--without-mem-debug"
     "--without-debugger"
diff --git a/pkgs/development/libraries/lmdb/default.nix b/pkgs/development/libraries/lmdb/default.nix
index d1a68cc66c601..0a3515db26225 100644
--- a/pkgs/development/libraries/lmdb/default.nix
+++ b/pkgs/development/libraries/lmdb/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional stdenv.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/liblmdb.so";
 
   doCheck = true;
-  checkPhase = "make test";
+  checkTarget = "test";
 
   postInstall = ''
     moveToOutput bin "$bin"
diff --git a/pkgs/development/libraries/lyra/default.nix b/pkgs/development/libraries/lyra/default.nix
index ed02af56f784f..31b85b01d6a5f 100644
--- a/pkgs/development/libraries/lyra/default.nix
+++ b/pkgs/development/libraries/lyra/default.nix
@@ -13,8 +13,6 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ meson ninja ];
 
-  enableParallelBuilding = true;
-
   postPatch = "sed -i s#/usr#$out#g meson.build";
 
   postInstall = ''
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 743080ee82eab..2b94f9c3bb503 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -145,7 +145,6 @@ self = stdenv.mkDerivation {
   ] ++ optional stdenv.isLinux libdrm
     ++ optionals stdenv.isDarwin [ OpenGL Xplugin ];
 
-  enableParallelBuilding = true;
   doCheck = false;
 
   postInstall = ''
diff --git a/pkgs/development/libraries/openbsm/default.nix b/pkgs/development/libraries/openbsm/default.nix
index 269b0138091b4..4719b7fb74704 100644
--- a/pkgs/development/libraries/openbsm/default.nix
+++ b/pkgs/development/libraries/openbsm/default.nix
@@ -13,6 +13,10 @@ stdenv.mkDerivation rec {
 
   patches = lib.optional stdenv.isDarwin [ ./bsm-add-audit_token_to_pid.patch ];
 
+  preConfigure = lib.optionalString (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '';
+
   configureFlags = [ "ac_cv_file__usr_include_mach_audit_triggers_defs=no" ];
 
   meta = {
diff --git a/pkgs/development/libraries/openldap/default.nix b/pkgs/development/libraries/openldap/default.nix
index fe4704341ef5c..f9e2b3c0b3fc7 100644
--- a/pkgs/development/libraries/openldap/default.nix
+++ b/pkgs/development/libraries/openldap/default.nix
@@ -30,6 +30,10 @@ stdenv.mkDerivation rec {
     "CC=${stdenv.cc.targetPrefix}cc"
   ];
 
+  preConfigure = lib.optionalString (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '';
+
   configureFlags = [
     "--enable-overlays"
     "--disable-dependency-tracking"   # speeds up one-time build
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index a336dd18fae4d..2a586f9e9efcd 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -69,6 +69,7 @@ let
         armv6l-linux = "./Configure linux-armv4 -march=armv6";
         armv7l-linux = "./Configure linux-armv4 -march=armv7-a";
         x86_64-darwin  = "./Configure darwin64-x86_64-cc";
+        aarch64-darwin = "./Configure darwin64-arm64-cc";
         x86_64-linux = "./Configure linux-x86_64";
         x86_64-solaris = "./Configure solaris64-x86_64-gcc";
       }.${stdenv.hostPlatform.system} or (
diff --git a/pkgs/development/libraries/pcre/default.nix b/pkgs/development/libraries/pcre/default.nix
index 8d9b9ec025992..c91d4e2bd0c29 100644
--- a/pkgs/development/libraries/pcre/default.nix
+++ b/pkgs/development/libraries/pcre/default.nix
@@ -23,7 +23,8 @@ in stdenv.mkDerivation {
 
   outputs = [ "bin" "dev" "out" "doc" "man" ];
 
-  configureFlags = optional (!stdenv.hostPlatform.isRiscV) "--enable-jit" ++ [
+  # Disable jit on Apple Silicon, https://github.com/zherczeg/sljit/issues/51
+  configureFlags = optional (!stdenv.hostPlatform.isRiscV && !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) "--enable-jit" ++ [
     "--enable-unicode-properties"
     "--disable-cpp"
   ]
diff --git a/pkgs/development/libraries/pcre2/default.nix b/pkgs/development/libraries/pcre2/default.nix
index 6bf6cff98bbe5..188fa9b16b7ef 100644
--- a/pkgs/development/libraries/pcre2/default.nix
+++ b/pkgs/development/libraries/pcre2/default.nix
@@ -8,10 +8,11 @@ stdenv.mkDerivation rec {
     sha256 = "0p3699msps07p40g9426lvxa3b41rg7k2fn7qxl2jm0kh4kkkvx9";
   };
 
+  # Disable jit on Apple Silicon, https://github.com/zherczeg/sljit/issues/51
   configureFlags = [
     "--enable-pcre2-16"
     "--enable-pcre2-32"
-  ] ++ lib.optional (!stdenv.hostPlatform.isRiscV) "--enable-jit";
+  ] ++ lib.optional (!stdenv.hostPlatform.isRiscV && !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) "--enable-jit";
 
   outputs = [ "bin" "dev" "out" "doc" "man" "devdoc" ];
 
diff --git a/pkgs/development/libraries/poppler/default.nix b/pkgs/development/libraries/poppler/default.nix
index 5a41fb0c341d0..0146d80221bf7 100644
--- a/pkgs/development/libraries/poppler/default.nix
+++ b/pkgs/development/libraries/poppler/default.nix
@@ -1,44 +1,77 @@
-{ stdenv, lib, fetchurl, fetchpatch, cmake, ninja, pkg-config, libiconv, libintl
-, zlib, curl, cairo, freetype, fontconfig, lcms, libjpeg, openjpeg
+{ stdenv
+, lib
+, fetchurl
+, fetchpatch
+, cmake
+, ninja
+, pkg-config
+, libiconv
+, libintl
+, zlib
+, curl
+, cairo
+, freetype
+, fontconfig
+, lcms
+, libjpeg
+, openjpeg
 , withData ? true, poppler_data
 , qt5Support ? false, qtbase ? null
 , introspectionSupport ? false, gobject-introspection ? null
 , utils ? false, nss ? null
-, minimal ? false, suffix ? "glib"
+, minimal ? false
+, suffix ? "glib"
+, inkscape
+, cups-filters
+, texlive
+, scribusUnstable
 }:
 
 let
   mkFlag = optset: flag: "-DENABLE_${flag}=${if optset then "on" else "off"}";
 in
-stdenv.mkDerivation (rec {
+stdenv.mkDerivation rec {
   name = "poppler-${suffix}-${version}";
-  version = "21.02.0"; # beware: updates often break cups-filters build, check texlive and scribusUnstable too!
+  version = "21.05.0"; # beware: updates often break cups-filters build, check texlive and scribusUnstable too!
+
+  outputs = [ "out" "dev" ];
 
   src = fetchurl {
     url = "${meta.homepage}/poppler-${version}.tar.xz";
-    sha256 = "sha256-XBR1nJmJHm5HKs7W1fD/Haz4XYDNkCbTZcVcZT7feSw=";
+    sha256 = "sha256-2v1Te2gPrRIVvED8U9HzjoRJ18GFvGDVqJ4dJskNvYw=";
   };
 
-  outputs = [ "out" "dev" ];
+  nativeBuildInputs = [
+    cmake
+    ninja
+    pkg-config
+  ];
 
-  buildInputs = [ libiconv libintl ] ++ lib.optional withData poppler_data;
+  buildInputs = [
+    libiconv
+    libintl
+  ] ++ lib.optional withData [
+    poppler_data
+  ];
 
   # TODO: reduce propagation to necessary libs
-  propagatedBuildInputs = with lib;
-    [ zlib freetype fontconfig libjpeg openjpeg ]
-    ++ optionals (!minimal) [ cairo lcms curl ]
-    ++ optional qt5Support qtbase
-    ++ optional utils nss
-    ++ optional introspectionSupport gobject-introspection;
-
-  nativeBuildInputs = [ cmake ninja pkg-config ];
-
-  # Workaround #54606
-  preConfigure = lib.optionalString stdenv.isDarwin ''
-    sed -i -e '1i cmake_policy(SET CMP0025 NEW)' CMakeLists.txt
-  '';
-
-  dontWrapQtApps = true;
+  propagatedBuildInputs = [
+    zlib
+    freetype
+    fontconfig
+    libjpeg
+    openjpeg
+  ] ++ lib.optionals (!minimal) [
+    cairo
+    lcms
+    curl
+  ] ++ lib.optionals qt5Support [
+    qtbase
+  ] ++ lib.optionals utils [
+    nss
+  ] ++ lib.optionals introspectionSupport [
+    gobject-introspection
+  ];
 
   cmakeFlags = [
     (mkFlag true "UNSTABLE_API_ABI_HEADERS") # previously "XPDF_HEADERS"
@@ -49,6 +82,20 @@ stdenv.mkDerivation (rec {
     (mkFlag qt5Support "QT5")
   ];
 
+  dontWrapQtApps = true;
+
+  # Workaround #54606
+  preConfigure = lib.optionalString stdenv.isDarwin ''
+    sed -i -e '1i cmake_policy(SET CMP0025 NEW)' CMakeLists.txt
+  '';
+
+  passthru = {
+    tests = {
+      # These depend on internal poppler code that frequently changes.
+      inherit inkscape cups-filters texlive scribusUnstable;
+    };
+  };
+
   meta = with lib; {
     homepage = "https://poppler.freedesktop.org/";
     description = "A PDF rendering library";
@@ -59,21 +106,8 @@ stdenv.mkDerivation (rec {
       installed separately.
     '';
 
-    license = licenses.gpl2;
+    license = licenses.gpl2Plus;
     platforms = platforms.all;
     maintainers = with maintainers; [ ttuegel ] ++ teams.freedesktop.members;
   };
-} // lib.optionalAttrs stdenv.isDarwin {
-  patches = [
-    # Fix build due to improperly used volatile in poppler-glib.
-    # https://gitlab.freedesktop.org/poppler/poppler/merge_requests/836
-    (fetchpatch {
-      url = "https://gitlab.freedesktop.org/poppler/poppler/commit/47de887d7658cfd68df44b3acf710971054f957b.patch";
-      sha256 = "uvYibBn2fOEqdotxK0Wpf8KhGYZXrpHdmS4jjlRNCj8=";
-    })
-    (fetchpatch {
-      url = "https://gitlab.freedesktop.org/poppler/poppler/commit/bdd110b45a38e8a4f80f522892e4c4a9e432abd5.patch";
-      sha256 = "WDUYXX6v5zk7tusz7DGBP58yFzgEvoBlNSLbfk7+QTc=";
-    })
-  ];
-})
+}
diff --git a/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0003-qtbase-mkspecs.patch b/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0003-qtbase-mkspecs.patch
index d5d8e70b788f2..506397bc6056d 100644
--- a/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0003-qtbase-mkspecs.patch
+++ b/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0003-qtbase-mkspecs.patch
@@ -1,6 +1,6 @@
-From 8bdbddc2e5fef1553b1ba0297d3c03b38e9b947b Mon Sep 17 00:00:00 2001
-From: Thomas Tuegel <ttuegel@mailbox.org>
-Date: Wed, 18 Sep 2019 05:39:39 -0500
+From 9ffbcc5e362d17aea3e3d67e43cd3cd993e987eb Mon Sep 17 00:00:00 2001
+From: OPNA2608 <christoph.neidahl@gmail.com>
+Date: Mon, 12 Apr 2021 20:05:25 +0200
 Subject: [PATCH 03/12] qtbase-mkspecs
 
 ---
@@ -12,13 +12,13 @@ Subject: [PATCH 03/12] qtbase-mkspecs
  mkspecs/features/qt_build_paths.prf           |  4 +-
  mkspecs/features/qt_docs.prf                  | 10 +--
  mkspecs/features/qt_example_installs.prf      |  2 +-
- mkspecs/features/qt_functions.prf             |  2 +-
+ mkspecs/features/qt_functions.prf             | 27 ++++---
  mkspecs/features/qt_installs.prf              | 22 ++---
  mkspecs/features/qt_plugin.prf                |  2 +-
- 11 files changed, 39 insertions(+), 142 deletions(-)
+ 11 files changed, 53 insertions(+), 153 deletions(-)
 
 diff --git a/mkspecs/features/create_cmake.prf b/mkspecs/features/create_cmake.prf
-index 00da9bd33f..bd166fbfea 100644
+index 02e5775983..3782949d32 100644
 --- a/mkspecs/features/create_cmake.prf
 +++ b/mkspecs/features/create_cmake.prf
 @@ -21,7 +21,7 @@ load(cmake_functions)
@@ -96,7 +96,7 @@ index 00da9bd33f..bd166fbfea 100644
      INSTALLS += cmake_qt5_plugin_file
  
      return()
-@@ -333,7 +308,7 @@ exists($$cmake_macros_file.input) {
+@@ -334,7 +309,7 @@ exists($$cmake_macros_file.input) {
      cmake_qt5_module_files.files += $$cmake_macros_file.output
  }
  
@@ -370,18 +370,44 @@ index 43b58817fe..e635b8f67a 100644
  
  check_examples {
 diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
-index 1903e509c8..ae7b585989 100644
+index 1903e509c8..1dc117a388 100644
 --- a/mkspecs/features/qt_functions.prf
 +++ b/mkspecs/features/qt_functions.prf
-@@ -69,7 +69,7 @@ defineTest(qtHaveModule) {
+@@ -69,19 +69,22 @@ defineTest(qtHaveModule) {
  defineTest(qtPrepareTool) {
      cmd = $$eval(QT_TOOL.$${2}.binary)
      isEmpty(cmd) {
 -        cmd = $$[QT_HOST_BINS]/$$2
-+        cmd = $$system("command -v $$2")
-         exists($${cmd}.pl) {
-             $${1}_EXE = $${cmd}.pl
-             cmd = perl -w $$system_path($${cmd}.pl)
+-        exists($${cmd}.pl) {
+-            $${1}_EXE = $${cmd}.pl
+-            cmd = perl -w $$system_path($${cmd}.pl)
+-        } else: contains(QMAKE_HOST.os, Windows) {
+-            $${1}_EXE = $${cmd}.exe
+-            cmd = $$system_path($${cmd}.exe)
+-        } else:contains(QMAKE_HOST.os, Darwin) {
+-            BUNDLENAME = $${cmd}.app/Contents/MacOS/$$2
+-            exists($$BUNDLENAME) {
+-                cmd = $$BUNDLENAME
++        cmd = $$system("command -v $${2}")
++        isEmpty(cmd) {
++            cmd = $$system("command -v $${2}.pl")
++            !isEmpty(cmd) {
++                $${1}_EXE = $$cmd
++                cmd = perl -w $$system_path($${cmd})
++            } else: contains(QMAKE_HOST.os, Windows) {
++                cmd = $$system("command -v $${2}.exe")
++                $${1}_EXE = $$cmd
++            } else: contains(QMAKE_HOST.os, Darwin) {
++                cmd = $$system("command -v $${2}.app")
++                !isEmpty(cmd) {
++                    cmd = $${cmd}/Contents/MacOS/$${2}
++                    $${1}_EXE = $$cmd
++                }
+             }
+-            $${1}_EXE = $$cmd
+         } else {
+             $${1}_EXE = $$cmd
+         }
 diff --git a/mkspecs/features/qt_installs.prf b/mkspecs/features/qt_installs.prf
 index 1ebca17366..b784441da0 100644
 --- a/mkspecs/features/qt_installs.prf
@@ -461,5 +487,5 @@ index 40528a65e2..903f795284 100644
  
  TARGET = $$qt5LibraryTarget($$TARGET)
 -- 
-2.23.GIT
+2.29.3
 
diff --git a/pkgs/development/libraries/qt-5/5.14/qtbase.patch.d/0003-qtbase-mkspecs.patch b/pkgs/development/libraries/qt-5/5.14/qtbase.patch.d/0003-qtbase-mkspecs.patch
index b704d0dc8722a..dbd6b36634434 100644
--- a/pkgs/development/libraries/qt-5/5.14/qtbase.patch.d/0003-qtbase-mkspecs.patch
+++ b/pkgs/development/libraries/qt-5/5.14/qtbase.patch.d/0003-qtbase-mkspecs.patch
@@ -1,6 +1,6 @@
-From 1cb5581d7f20bf87ac8d67a7295447a78a1d9645 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Milan=20P=C3=A4ssler?= <me@pbb.lc>
-Date: Sat, 4 Apr 2020 00:25:52 +0200
+From 87c81a31d65862a2f32fdc575cfb47b7a46bfae7 Mon Sep 17 00:00:00 2001
+From: OPNA2608 <christoph.neidahl@gmail.com>
+Date: Mon, 12 Apr 2021 20:05:25 +0200
 Subject: [PATCH 03/10] qtbase-mkspecs
 
 ---
@@ -12,10 +12,10 @@ Subject: [PATCH 03/10] qtbase-mkspecs
  mkspecs/features/qt_build_paths.prf           |  4 +-
  mkspecs/features/qt_docs.prf                  | 10 +--
  mkspecs/features/qt_example_installs.prf      |  2 +-
- mkspecs/features/qt_functions.prf             |  2 +-
+ mkspecs/features/qt_functions.prf             | 27 ++++---
  mkspecs/features/qt_installs.prf              | 22 ++---
  mkspecs/features/qt_plugin.prf                |  2 +-
- 11 files changed, 38 insertions(+), 141 deletions(-)
+ 11 files changed, 52 insertions(+), 152 deletions(-)
 
 diff --git a/mkspecs/features/create_cmake.prf b/mkspecs/features/create_cmake.prf
 index 0e71fd0015..ba071d9a70 100644
@@ -369,18 +369,44 @@ index 72b47bce27..d59e949e78 100644
  
  check_examples {
 diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
-index 7777e615bd..abeb03a663 100644
+index 7777e615bd..b0c6880a74 100644
 --- a/mkspecs/features/qt_functions.prf
 +++ b/mkspecs/features/qt_functions.prf
-@@ -87,7 +87,7 @@ defineTest(qtHaveModule) {
+@@ -87,19 +87,22 @@ defineTest(qtHaveModule) {
  defineTest(qtPrepareTool) {
      cmd = $$eval(QT_TOOL.$${2}.binary)
      isEmpty(cmd) {
 -        cmd = $$[QT_HOST_BINS]/$$2
-+        cmd = $$system("command -v $$2")
-         exists($${cmd}.pl) {
-             $${1}_EXE = $${cmd}.pl
-             cmd = perl -w $$system_path($${cmd}.pl)
+-        exists($${cmd}.pl) {
+-            $${1}_EXE = $${cmd}.pl
+-            cmd = perl -w $$system_path($${cmd}.pl)
+-        } else: contains(QMAKE_HOST.os, Windows) {
+-            $${1}_EXE = $${cmd}.exe
+-            cmd = $$system_path($${cmd}.exe)
+-        } else:contains(QMAKE_HOST.os, Darwin) {
+-            BUNDLENAME = $${cmd}.app/Contents/MacOS/$$2
+-            exists($$BUNDLENAME) {
+-                cmd = $$BUNDLENAME
++        cmd = $$system("command -v $${2}")
++        isEmpty(cmd) {
++            cmd = $$system("command -v $${2}.pl")
++            !isEmpty(cmd) {
++                $${1}_EXE = $$cmd
++                cmd = perl -w $$system_path($${cmd})
++            } else: contains(QMAKE_HOST.os, Windows) {
++                cmd = $$system("command -v $${2}.exe")
++                $${1}_EXE = $$cmd
++            } else: contains(QMAKE_HOST.os, Darwin) {
++                cmd = $$system("command -v $${2}.app")
++                !isEmpty(cmd) {
++                    cmd = $${cmd}/Contents/MacOS/$${2}
++                    $${1}_EXE = $$cmd
++                }
+             }
+-            $${1}_EXE = $$cmd
+         } else {
+             $${1}_EXE = $$cmd
+         }
 diff --git a/mkspecs/features/qt_installs.prf b/mkspecs/features/qt_installs.prf
 index 1ebca17366..a8f958eae8 100644
 --- a/mkspecs/features/qt_installs.prf
@@ -460,5 +486,5 @@ index 573d717eea..024c624cb6 100644
  
  qt_libinfix_plugins: TARGET = $$TARGET$$QT_LIBINFIX
 -- 
-2.25.1
+2.29.3
 
diff --git a/pkgs/development/libraries/qt-5/5.15/qtbase.patch.d/0003-qtbase-mkspecs.patch b/pkgs/development/libraries/qt-5/5.15/qtbase.patch.d/0003-qtbase-mkspecs.patch
index 9f8ef67ab5d97..1c9012c0f2e80 100644
--- a/pkgs/development/libraries/qt-5/5.15/qtbase.patch.d/0003-qtbase-mkspecs.patch
+++ b/pkgs/development/libraries/qt-5/5.15/qtbase.patch.d/0003-qtbase-mkspecs.patch
@@ -1,6 +1,6 @@
-From 82771c437957b3684ce296997d795432756aa8b1 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Milan=20P=C3=A4ssler?= <me@pbb.lc>
-Date: Sat, 4 Apr 2020 00:25:52 +0200
+From 03a5a7eab673d18d00c9b5eb8c7d5b790079e8ff Mon Sep 17 00:00:00 2001
+From: OPNA2608 <christoph.neidahl@gmail.com>
+Date: Mon, 12 Apr 2021 20:20:46 +0200
 Subject: [PATCH 03/11] qtbase-mkspecs
 
 ---
@@ -12,10 +12,10 @@ Subject: [PATCH 03/11] qtbase-mkspecs
  mkspecs/features/qt_build_paths.prf           |  4 +-
  mkspecs/features/qt_docs.prf                  | 10 +--
  mkspecs/features/qt_example_installs.prf      |  2 +-
- mkspecs/features/qt_functions.prf             |  2 +-
+ mkspecs/features/qt_functions.prf             | 27 ++++---
  mkspecs/features/qt_installs.prf              | 22 ++---
  mkspecs/features/qt_plugin.prf                |  2 +-
- 11 files changed, 38 insertions(+), 141 deletions(-)
+ 11 files changed, 52 insertions(+), 152 deletions(-)
 
 diff --git a/mkspecs/features/create_cmake.prf b/mkspecs/features/create_cmake.prf
 index 24ed125f12..f0666a1986 100644
@@ -105,7 +105,7 @@ index 24ed125f12..f0666a1986 100644
  # We are generating cmake files. Most developers of Qt are not aware of cmake,
  # so we require automatic tests to be available. The only module which should
 diff --git a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
-index 309798a767..b6c3ab8609 100644
+index db18dbece6..8246f37931 100644
 --- a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
 +++ b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
 @@ -2,30 +2,6 @@ if (CMAKE_VERSION VERSION_LESS 3.1.0)
@@ -200,7 +200,7 @@ index 309798a767..b6c3ab8609 100644
  !!IF !isEmpty(CMAKE_ADD_SOURCE_INCLUDE_DIRS)
      include(\"${CMAKE_CURRENT_LIST_DIR}/ExtraSourceIncludes.cmake\" OPTIONAL)
  !!ENDIF
-@@ -499,25 +455,13 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
+@@ -491,25 +447,13 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
  !!IF !isEmpty(CMAKE_FIND_OTHER_LIBRARY_BUILD)
  !!IF isEmpty(CMAKE_DEBUG_TYPE)
  !!IF !isEmpty(CMAKE_STATIC_WINDOWS_BUILD)
@@ -226,7 +226,7 @@ index 309798a767..b6c3ab8609 100644
          _populate_$${CMAKE_MODULE_NAME}_target_properties(DEBUG \"$${CMAKE_LIB_FILE_LOCATION_DEBUG}\" \"$${CMAKE_IMPLIB_FILE_LOCATION_DEBUG}\" $${CMAKE_DEBUG_AND_RELEASE})
  !!ENDIF // CMAKE_STATIC_WINDOWS_BUILD
      endif()
-@@ -536,25 +480,13 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
+@@ -528,25 +472,13 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
  !!IF !isEmpty(CMAKE_FIND_OTHER_LIBRARY_BUILD)
  !!IF isEmpty(CMAKE_RELEASE_TYPE)
  !!IF !isEmpty(CMAKE_STATIC_WINDOWS_BUILD)
@@ -252,7 +252,7 @@ index 309798a767..b6c3ab8609 100644
          _populate_$${CMAKE_MODULE_NAME}_target_properties(RELEASE \"$${CMAKE_LIB_FILE_LOCATION_RELEASE}\" \"$${CMAKE_IMPLIB_FILE_LOCATION_RELEASE}\" $${CMAKE_DEBUG_AND_RELEASE})
  !!ENDIF // CMAKE_STATIC_WINDOWS_BUILD
      endif()
-@@ -581,11 +513,7 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
+@@ -573,11 +505,7 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
            IsDebugAndRelease)
          set_property(TARGET Qt5::${Plugin} APPEND PROPERTY IMPORTED_CONFIGURATIONS ${Configuration})
  
@@ -265,7 +265,7 @@ index 309798a767..b6c3ab8609 100644
          set_target_properties(Qt5::${Plugin} PROPERTIES
              \"IMPORTED_LOCATION_${Configuration}\" ${imported_location}
 diff --git a/mkspecs/features/qml_module.prf b/mkspecs/features/qml_module.prf
-index c0b50416c9..cabe39b22e 100644
+index 3d6cd9b3db..ca8b0b2701 100644
 --- a/mkspecs/features/qml_module.prf
 +++ b/mkspecs/features/qml_module.prf
 @@ -51,7 +51,7 @@ builtin_resources {
@@ -369,18 +369,44 @@ index 15b373ba40..5c373fe1d5 100644
  
  check_examples {
 diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
-index 7777e615bd..abeb03a663 100644
+index 7777e615bd..b0c6880a74 100644
 --- a/mkspecs/features/qt_functions.prf
 +++ b/mkspecs/features/qt_functions.prf
-@@ -87,7 +87,7 @@ defineTest(qtHaveModule) {
+@@ -87,19 +87,22 @@ defineTest(qtHaveModule) {
  defineTest(qtPrepareTool) {
      cmd = $$eval(QT_TOOL.$${2}.binary)
      isEmpty(cmd) {
 -        cmd = $$[QT_HOST_BINS]/$$2
-+        cmd = $$system("command -v $$2")
-         exists($${cmd}.pl) {
-             $${1}_EXE = $${cmd}.pl
-             cmd = perl -w $$system_path($${cmd}.pl)
+-        exists($${cmd}.pl) {
+-            $${1}_EXE = $${cmd}.pl
+-            cmd = perl -w $$system_path($${cmd}.pl)
+-        } else: contains(QMAKE_HOST.os, Windows) {
+-            $${1}_EXE = $${cmd}.exe
+-            cmd = $$system_path($${cmd}.exe)
+-        } else:contains(QMAKE_HOST.os, Darwin) {
+-            BUNDLENAME = $${cmd}.app/Contents/MacOS/$$2
+-            exists($$BUNDLENAME) {
+-                cmd = $$BUNDLENAME
++        cmd = $$system("command -v $${2}")
++        isEmpty(cmd) {
++            cmd = $$system("command -v $${2}.pl")
++            !isEmpty(cmd) {
++                $${1}_EXE = $$cmd
++                cmd = perl -w $$system_path($${cmd})
++            } else: contains(QMAKE_HOST.os, Windows) {
++                cmd = $$system("command -v $${2}.exe")
++                $${1}_EXE = $$cmd
++            } else: contains(QMAKE_HOST.os, Darwin) {
++                cmd = $$system("command -v $${2}.app")
++                !isEmpty(cmd) {
++                    cmd = $${cmd}/Contents/MacOS/$${2}
++                    $${1}_EXE = $$cmd
++                }
+             }
+-            $${1}_EXE = $$cmd
+         } else {
+             $${1}_EXE = $$cmd
+         }
 diff --git a/mkspecs/features/qt_installs.prf b/mkspecs/features/qt_installs.prf
 index 1ebca17366..a8f958eae8 100644
 --- a/mkspecs/features/qt_installs.prf
@@ -460,5 +486,5 @@ index 573d717eea..024c624cb6 100644
  
  qt_libinfix_plugins: TARGET = $$TARGET$$QT_LIBINFIX
 -- 
-2.25.4
+2.29.3
 
diff --git a/pkgs/development/libraries/qt-5/modules/qtcharts.nix b/pkgs/development/libraries/qt-5/modules/qtcharts.nix
index 84d3a17ea8cef..f5d034bcc3272 100644
--- a/pkgs/development/libraries/qt-5/modules/qtcharts.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtcharts.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtcharts";
+  pname = "qtcharts";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix b/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
index f6aeb23fb7b43..ae3aa25427c80 100644
--- a/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
@@ -1,7 +1,7 @@
 { qtModule, lib, stdenv, qtbase, qtdeclarative, bluez }:
 
 qtModule {
-  name = "qtconnectivity";
+  pname = "qtconnectivity";
   qtInputs = [ qtbase qtdeclarative ];
   buildInputs = lib.optional stdenv.isLinux bluez;
   outputs = [ "out" "dev" "bin" ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtdeclarative.nix b/pkgs/development/libraries/qt-5/modules/qtdeclarative.nix
index b611282294c65..97248ca180760 100644
--- a/pkgs/development/libraries/qt-5/modules/qtdeclarative.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtdeclarative.nix
@@ -3,7 +3,7 @@
 with lib;
 
 qtModule {
-  name = "qtdeclarative";
+  pname = "qtdeclarative";
   qtInputs = [ qtbase qtsvg ];
   nativeBuildInputs = [ python3 ];
   outputs = [ "out" "dev" "bin" ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtdoc.nix b/pkgs/development/libraries/qt-5/modules/qtdoc.nix
index 10623962c430c..4ef4915000e56 100644
--- a/pkgs/development/libraries/qt-5/modules/qtdoc.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtdoc.nix
@@ -1,7 +1,7 @@
 { qtModule, qtdeclarative }:
 
 qtModule {
-  name = "qtdoc";
+  pname = "qtdoc";
   qtInputs = [ qtdeclarative ];
   outputs = [ "out" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtgamepad.nix b/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
index 6bc023eb9bbdc..2e266060a3411 100644
--- a/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative, pkg-config }:
 
 qtModule {
-  name = "qtgamepad";
+  pname = "qtgamepad";
   qtInputs = [ qtbase qtdeclarative ];
   buildInputs = [ ];
   nativeBuildInputs = [ pkg-config ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtgraphicaleffects.nix b/pkgs/development/libraries/qt-5/modules/qtgraphicaleffects.nix
index d0be6ae776940..c90280090b8e1 100644
--- a/pkgs/development/libraries/qt-5/modules/qtgraphicaleffects.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtgraphicaleffects.nix
@@ -1,7 +1,7 @@
 { qtModule, qtdeclarative }:
 
 qtModule {
-  name = "qtgraphicaleffects";
+  pname = "qtgraphicaleffects";
   qtInputs = [ qtdeclarative ];
   outputs = [ "out" "dev" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtimageformats.nix b/pkgs/development/libraries/qt-5/modules/qtimageformats.nix
index 9c80507b7c70c..52fa4d4ba8ff0 100644
--- a/pkgs/development/libraries/qt-5/modules/qtimageformats.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtimageformats.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, libtiff }:
 
 qtModule {
-  name = "qtimageformats";
+  pname = "qtimageformats";
   qtInputs = [ qtbase ];
   propagatedBuildInputs = [ libtiff ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtlocation.nix b/pkgs/development/libraries/qt-5/modules/qtlocation.nix
index 182b5f5bc334c..687571f18d296 100644
--- a/pkgs/development/libraries/qt-5/modules/qtlocation.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtlocation.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, qtModule, qtbase, qtmultimedia }:
 
 qtModule {
-  name = "qtlocation";
+  pname = "qtlocation";
   qtInputs = [ qtbase qtmultimedia ];
   outputs = [ "bin" "out" "dev" ];
   qmakeFlags = lib.optional stdenv.isDarwin [
diff --git a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
index 5e7ccf702045b..30e363cff59a7 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmacextras.nix
@@ -1,7 +1,7 @@
 { lib, qtModule, qtbase }:
 
 qtModule {
-  name = "qtmacextras";
+  pname = "qtmacextras";
   qtInputs = [ qtbase ];
   meta = with lib; {
     maintainers = with maintainers; [ periklis ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
index eb2c3bc7431da..0af773947f04f 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
@@ -5,7 +5,7 @@
 with lib;
 
 qtModule {
-  name = "qtmultimedia";
+  pname = "qtmultimedia";
   qtInputs = [ qtbase qtdeclarative ];
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ gstreamer gst-plugins-base libpulseaudio ]
diff --git a/pkgs/development/libraries/qt-5/modules/qtnetworkauth.nix b/pkgs/development/libraries/qt-5/modules/qtnetworkauth.nix
index e6ef428cc3c4e..148ed890fc9ed 100644
--- a/pkgs/development/libraries/qt-5/modules/qtnetworkauth.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtnetworkauth.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase }:
 
 qtModule {
-  name = "qtnetworkauth";
+  pname = "qtnetworkauth";
   qtInputs = [ qtbase ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtquickcontrols.nix b/pkgs/development/libraries/qt-5/modules/qtquickcontrols.nix
index ba0f20bc0d83d..6c85a91fb78c0 100644
--- a/pkgs/development/libraries/qt-5/modules/qtquickcontrols.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtquickcontrols.nix
@@ -1,6 +1,6 @@
 { qtModule, qtdeclarative }:
 
 qtModule {
-  name = "qtquickcontrols";
+  pname = "qtquickcontrols";
   qtInputs = [ qtdeclarative ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtquickcontrols2.nix b/pkgs/development/libraries/qt-5/modules/qtquickcontrols2.nix
index a9522f4b1f0cd..a50ad9e2a3040 100644
--- a/pkgs/development/libraries/qt-5/modules/qtquickcontrols2.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtquickcontrols2.nix
@@ -1,7 +1,7 @@
 { qtModule, qtdeclarative }:
 
 qtModule {
-  name = "qtquickcontrols2";
+  pname = "qtquickcontrols2";
   qtInputs = [ qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtscript.nix b/pkgs/development/libraries/qt-5/modules/qtscript.nix
index 5a1a462a9640e..e7ce86b74a68b 100644
--- a/pkgs/development/libraries/qt-5/modules/qtscript.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtscript.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase, qttools }:
 
 qtModule {
-  name = "qtscript";
+  pname = "qtscript";
   qtInputs = [ qtbase qttools ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtscxml.nix b/pkgs/development/libraries/qt-5/modules/qtscxml.nix
index 62b428b089336..cf9af0bc75435 100644
--- a/pkgs/development/libraries/qt-5/modules/qtscxml.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtscxml.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtscxml";
+  pname = "qtscxml";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtsensors.nix b/pkgs/development/libraries/qt-5/modules/qtsensors.nix
index 3b8732b68851f..3fbd032b968f4 100644
--- a/pkgs/development/libraries/qt-5/modules/qtsensors.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtsensors.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtsensors";
+  pname = "qtsensors";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtserialbus.nix b/pkgs/development/libraries/qt-5/modules/qtserialbus.nix
index 48968a254c65d..4fd6d7cb83c38 100644
--- a/pkgs/development/libraries/qt-5/modules/qtserialbus.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtserialbus.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase, qtserialport }:
 
 qtModule {
-  name = "qtserialbus";
+  pname = "qtserialbus";
   qtInputs = [ qtbase qtserialport ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtserialport.nix b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
index 516d38340dc53..caeaedbcf3d5f 100644
--- a/pkgs/development/libraries/qt-5/modules/qtserialport.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
@@ -3,7 +3,7 @@
 let inherit (lib) getLib optional; in
 
 qtModule {
-  name = "qtserialport";
+  pname = "qtserialport";
   qtInputs = [ qtbase ];
   NIX_CFLAGS_COMPILE =
     optional stdenv.isLinux
diff --git a/pkgs/development/libraries/qt-5/modules/qtspeech.nix b/pkgs/development/libraries/qt-5/modules/qtspeech.nix
index ddef01a9482e3..d2748ba8d4c54 100644
--- a/pkgs/development/libraries/qt-5/modules/qtspeech.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtspeech.nix
@@ -1,7 +1,7 @@
 { qtModule }:
 
 qtModule {
-  name = "qtspeech";
+  pname = "qtspeech";
   qtInputs = [ ];
   outputs = [ "out" "dev" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtsvg.nix b/pkgs/development/libraries/qt-5/modules/qtsvg.nix
index 3ce68e56e4126..59c7cf67448c0 100644
--- a/pkgs/development/libraries/qt-5/modules/qtsvg.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtsvg.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase }:
 
 qtModule {
-  name = "qtsvg";
+  pname = "qtsvg";
   qtInputs = [ qtbase ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qttools.nix b/pkgs/development/libraries/qt-5/modules/qttools.nix
index fae90972978f0..437ec6cef7436 100644
--- a/pkgs/development/libraries/qt-5/modules/qttools.nix
+++ b/pkgs/development/libraries/qt-5/modules/qttools.nix
@@ -3,7 +3,7 @@
 with lib;
 
 qtModule {
-  name = "qttools";
+  pname = "qttools";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 
diff --git a/pkgs/development/libraries/qt-5/modules/qttranslations.nix b/pkgs/development/libraries/qt-5/modules/qttranslations.nix
index 11a6e3fedcb10..f49a4eb9a85d0 100644
--- a/pkgs/development/libraries/qt-5/modules/qttranslations.nix
+++ b/pkgs/development/libraries/qt-5/modules/qttranslations.nix
@@ -1,6 +1,6 @@
 { qtModule, qttools }:
 
 qtModule {
-  name = "qttranslations";
+  pname = "qttranslations";
   qtInputs = [ qttools ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtvirtualkeyboard.nix b/pkgs/development/libraries/qt-5/modules/qtvirtualkeyboard.nix
index 2ba720c8eedc7..77f1948dbf43e 100644
--- a/pkgs/development/libraries/qt-5/modules/qtvirtualkeyboard.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtvirtualkeyboard.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase, qtdeclarative, qtsvg, hunspell  }:
 
 qtModule {
-  name = "qtvirtualkeyboard";
+  pname = "qtvirtualkeyboard";
   qtInputs = [ qtbase qtdeclarative qtsvg hunspell ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtwayland.nix b/pkgs/development/libraries/qt-5/modules/qtwayland.nix
index 5291ea9c9a787..1bd1adedaf040 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwayland.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwayland.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtquickcontrols, wayland, pkg-config }:
 
 qtModule {
-  name = "qtwayland";
+  pname = "qtwayland";
   qtInputs = [ qtbase qtquickcontrols ];
   buildInputs = [ wayland ];
   nativeBuildInputs = [ pkg-config ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebchannel.nix b/pkgs/development/libraries/qt-5/modules/qtwebchannel.nix
index 84fb88385a3ec..f49e9e234901c 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebchannel.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebchannel.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtwebchannel";
+  pname = "qtwebchannel";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
index 23ca50ba25ab9..0229d92d9a210 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
@@ -25,18 +25,10 @@
 with lib;
 
 qtModule {
-  name = "qtwebengine";
+  pname = "qtwebengine";
   qtInputs = [ qtdeclarative qtquickcontrols qtlocation qtwebchannel ];
   nativeBuildInputs = [
     bison coreutils flex git gperf ninja pkg-config python2 which gn nodejs
-
-    # qmake looks for syncqt instead of syncqt.pl and fails with a cryptic
-    # error if it can't find it. syncqt.pl also has a /usr/bin/env shebang, so
-    # it can't be directly used in a sandboxed build environment.
-    (writeScriptBin "syncqt" ''
-      #!${stdenv.shell}
-      exec ${perl}/bin/perl ${qtbase.dev}/bin/syncqt.pl "$@"
-    '')
   ] ++ optional stdenv.isDarwin xcbuild;
   doCheck = true;
   outputs = [ "bin" "dev" "out" ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebglplugin.nix b/pkgs/development/libraries/qt-5/modules/qtwebglplugin.nix
index 444d0c1beae88..d8fd7a692370c 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebglplugin.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebglplugin.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase, qtwebsockets }:
 
 qtModule {
-  name = "qtwebglplugin";
+  pname = "qtwebglplugin";
   qtInputs = [ qtbase qtwebsockets ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index 288a0e30f6902..e2dd0d4b19c72 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -22,7 +22,7 @@ let
   usingAnnulenWebkitFork = lib.versionAtLeast qtbase.version "5.11.0";
 in
 qtModule {
-  name = "qtwebkit";
+  pname = "qtwebkit";
   qtInputs = [ qtbase qtdeclarative qtlocation qtsensors ]
     ++ optional (stdenv.isDarwin && lib.versionAtLeast qtbase.version "5.9.0") qtmultimedia
     ++ optional usingAnnulenWebkitFork qtwebchannel;
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebsockets.nix b/pkgs/development/libraries/qt-5/modules/qtwebsockets.nix
index ad5e7625f2891..540fcade73c9d 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebsockets.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebsockets.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtwebsockets";
+  pname = "qtwebsockets";
   qtInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebview.nix b/pkgs/development/libraries/qt-5/modules/qtwebview.nix
index 4034dce49f56d..1df8ef8663892 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebview.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebview.nix
@@ -3,7 +3,7 @@
 with lib;
 
 qtModule {
-  name = "qtwebview";
+  pname = "qtwebview";
   qtInputs = [ qtdeclarative qtwebengine ];
   buildInputs = optional (stdenv.isDarwin) [
     darwin.apple_sdk.frameworks.CoreFoundation
diff --git a/pkgs/development/libraries/qt-5/modules/qtx11extras.nix b/pkgs/development/libraries/qt-5/modules/qtx11extras.nix
index 4d431fee278be..ad743523bb003 100644
--- a/pkgs/development/libraries/qt-5/modules/qtx11extras.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtx11extras.nix
@@ -1,6 +1,6 @@
 { qtModule, qtbase }:
 
 qtModule {
-  name = "qtx11extras";
+  pname = "qtx11extras";
   qtInputs = [ qtbase ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtxmlpatterns.nix b/pkgs/development/libraries/qt-5/modules/qtxmlpatterns.nix
index 7ac922421f08c..c602b1e39d2db 100644
--- a/pkgs/development/libraries/qt-5/modules/qtxmlpatterns.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtxmlpatterns.nix
@@ -1,7 +1,7 @@
 { qtModule, qtbase, qtdeclarative }:
 
 qtModule {
-  name = "qtxmlpatterns";
+  pname = "qtxmlpatterns";
   qtInputs = [ qtbase qtdeclarative ];
   devTools = [ "bin/xmlpatterns" "bin/xmlpatternsvalidator" ];
 }
diff --git a/pkgs/development/libraries/qt-5/qtModule.nix b/pkgs/development/libraries/qt-5/qtModule.nix
index ebd6e887ec9d9..767cbc91142d0 100644
--- a/pkgs/development/libraries/qt-5/qtModule.nix
+++ b/pkgs/development/libraries/qt-5/qtModule.nix
@@ -7,7 +7,7 @@ let inherit (lib) licenses maintainers platforms; in
 args:
 
 let
-  pname = args.name;
+  inherit (args) pname;
   version = args.version or srcs.${pname}.version;
   src = args.src or srcs.${pname}.src;
 in
diff --git a/pkgs/development/libraries/science/math/or-tools/default.nix b/pkgs/development/libraries/science/math/or-tools/default.nix
index 2b6eb5705cd90..741c6f4898b66 100644
--- a/pkgs/development/libraries/science/math/or-tools/default.nix
+++ b/pkgs/development/libraries/science/math/or-tools/default.nix
@@ -1,7 +1,6 @@
 { lib
 , stdenv
 , fetchFromGitHub
-, fetchpatch
 , cmake
 , abseil-cpp
 , bzip2
@@ -17,25 +16,16 @@
 
 stdenv.mkDerivation rec {
   pname = "or-tools";
-  version = "8.1";
+  version = "9.0";
   disabled = python.pythonOlder "3.6";  # not supported upstream
 
   src = fetchFromGitHub {
     owner = "google";
     repo = "or-tools";
     rev = "v${version}";
-    sha256 = "1zqgvkaw5vf2d8pwsa34g9jysbpiwplzxc8jyy8kdbzmj8ax3gpg";
+    sha256 = "0yihrsg8wj4b82xwg1hbn97my8zqd7xhw7dk7wm2axsyvqd6m3b3";
   };
 
-  patches = [
-    # This patch (on master as of Feb 11, 2021) fixes or-tools failing to respect
-    # USE_SCIP=OFF and then failing to find scip/scip.h
-    (fetchpatch {
-      url = "https://github.com/google/or-tools/commit/17321869832b5adaccd9864e7e5576122730a5d5.patch";
-      sha256 = "0bi2z1hqlpdm1if3xa5dzc2zv0qlm5xi2x979brx10f8k779ghn0";
-    })
-  ];
-
   # The original build system uses cmake which does things like pull
   # in dependencies through git and Makefile creation time. We
   # obviously don't want to do this so instead we provide the
diff --git a/pkgs/development/libraries/spdk/default.nix b/pkgs/development/libraries/spdk/default.nix
index a0c875079c442..755c65d2fa454 100644
--- a/pkgs/development/libraries/spdk/default.nix
+++ b/pkgs/development/libraries/spdk/default.nix
@@ -55,8 +55,6 @@ in stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-mssse3"; # Necessary to compile.
 
-  enableParallelBuilding = true;
-
   meta = with lib; {
     description = "Set of libraries for fast user-mode storage";
     homepage = "https://spdk.io/";
diff --git a/pkgs/development/libraries/wasilibc/default.nix b/pkgs/development/libraries/wasilibc/default.nix
index f8142f046b746..56ed7367b2b29 100644
--- a/pkgs/development/libraries/wasilibc/default.nix
+++ b/pkgs/development/libraries/wasilibc/default.nix
@@ -1,7 +1,8 @@
 { stdenv, fetchFromGitHub, lib }:
 
 stdenv.mkDerivation {
-  name = "wasilibc-20190712";
+  pname = "wasilibc";
+  version = "20190712";
   src = fetchFromGitHub {
     owner = "CraneStation";
     repo = "wasi-libc";
diff --git a/pkgs/development/libraries/wayland/default.nix b/pkgs/development/libraries/wayland/default.nix
index a06d75e53dc4f..08741c29dd6d1 100644
--- a/pkgs/development/libraries/wayland/default.nix
+++ b/pkgs/development/libraries/wayland/default.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchurl
+, fetchpatch
 , substituteAll
 , meson
 , pkg-config
@@ -37,6 +38,11 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
+    # Picked from upstream 'main' branch for Darwin support.
+    (fetchpatch {
+      url = "https://gitlab.freedesktop.org/wayland/wayland/-/commit/f452e41264387dee4fd737cbf1af58b34b53941b.patch";
+      sha256 = "00mk32a01vgn31sm3wk4p8mfwvqv3xv02rxvdj1ygnzgb1ac62r7";
+    })
     (substituteAll {
       src = ./0001-add-placeholder-for-nm.patch;
       nm = "${stdenv.cc.targetPrefix}nm";
diff --git a/pkgs/development/libraries/zlib/default.nix b/pkgs/development/libraries/zlib/default.nix
index 998550d1fee6e..a9fadf46c4b2e 100644
--- a/pkgs/development/libraries/zlib/default.nix
+++ b/pkgs/development/libraries/zlib/default.nix
@@ -37,8 +37,8 @@ stdenv.mkDerivation (rec {
 
   postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure \
-      --replace '/usr/bin/libtool' 'ar' \
-      --replace 'AR="libtool"' 'AR="ar"' \
+      --replace '/usr/bin/libtool' '${stdenv.cc.targetPrefix}ar' \
+      --replace 'AR="libtool"' 'AR="${stdenv.cc.targetPrefix}ar"' \
       --replace 'ARFLAGS="-o"' 'ARFLAGS="-r"'
   '';
 
diff --git a/pkgs/development/lisp-modules/lisp-packages.nix b/pkgs/development/lisp-modules/lisp-packages.nix
index 82a86404ca58d..e4f623686a9af 100644
--- a/pkgs/development/lisp-modules/lisp-packages.nix
+++ b/pkgs/development/lisp-modules/lisp-packages.nix
@@ -124,8 +124,7 @@ let lispPackages = rec {
   };
   nyxt = pkgs.lispPackages.buildLispPackage rec {
     baseName = "nyxt";
-    version = "2021-05-06";
-
+    version = "2.0.0";
 
     description = "Browser";
 
@@ -194,10 +193,8 @@ let lispPackages = rec {
     src = pkgs.fetchFromGitHub {
       owner = "atlas-engineer";
       repo = "nyxt";
-      rev = "940a5f9a19770771cf29f8fa7505e99c3a242b67";
-      sha256 = "sha256:0d5mawka26gwi9nb45x1n33vgskwyn46jrvfz7nzmm2jfaq4ipn6";
-      # Version 2 pre-release 7
-      # date = "2021-05-06T11:30:27Z";
+      rev = "${version}";
+      sha256 = "sha256-eSRNfzkAzGTorLjdHo1LQEKLx4ASdv3RGXIFZ5WFIXk=";
     };
 
     packageName = "nyxt";
diff --git a/pkgs/development/misc/loc/default.nix b/pkgs/development/misc/loc/default.nix
index fb518279d00b8..ce262d946a80e 100644
--- a/pkgs/development/misc/loc/default.nix
+++ b/pkgs/development/misc/loc/default.nix
@@ -13,7 +13,7 @@ buildRustPackage rec {
     sha256 = "0086asrx48qlmc484pjz5r5znli85q6qgpfbd81gjlzylj7f57gg";
   };
 
-  cargoSha256 = "1fgv1kxiif48q9mm60ygn88r5nkxfyiacmvbgwp0jxiacv8r7779";
+  cargoSha256 = "1qfqhqimp56g34bir30zgl273yssrbmwf1h8h8yvdpzkybpd92gx";
 
   meta = with lib; {
     homepage = "https://github.com/cgag/loc";
diff --git a/pkgs/development/python-modules/aiohomekit/default.nix b/pkgs/development/python-modules/aiohomekit/default.nix
index f9afbe22c917f..2d76d033231d8 100644
--- a/pkgs/development/python-modules/aiohomekit/default.nix
+++ b/pkgs/development/python-modules/aiohomekit/default.nix
@@ -11,7 +11,7 @@
 
 buildPythonPackage rec {
   pname = "aiohomekit";
-  version = "0.2.61";
+  version = "0.2.62";
   format = "pyproject";
   disabled = pythonAtLeast "3.9";
 
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "Jc2k";
     repo = pname;
     rev = version;
-    sha256 = "047ql5a4i4354jgr8xr2waim8j522z58vbfi7aa62jqc9l8jzxzk";
+    sha256 = "sha256-01IzeR0iukPTkz8I7h93wZkgjz6flRAJN8unEX6d+cs=";
   };
 
   nativeBuildInputs = [ poetry ];
diff --git a/pkgs/development/python-modules/arrow/1.nix b/pkgs/development/python-modules/arrow/1.nix
deleted file mode 100644
index f9b830762b30e..0000000000000
--- a/pkgs/development/python-modules/arrow/1.nix
+++ /dev/null
@@ -1,41 +0,0 @@
-{ lib, buildPythonPackage, fetchPypi, pythonOlder
-, simplejson, typing-extensions, python-dateutil, pytz, pytest-mock, sphinx
-, dateparser, pytestcov, pytestCheckHook
-}:
-
-buildPythonPackage rec {
-  pname = "arrow";
-  version = "1.0.3";
-
-  disabled = pythonOlder "3.6";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "0793badh4hgbk2c5g70hmbl7n3d4g5d87bcflld0w9rjwy59r71r";
-  };
-
-  propagatedBuildInputs = [ python-dateutil ]
-    ++ lib.optionals (!pythonOlder "3.8") [ typing-extensions ];
-
-  checkInputs = [
-    dateparser
-    pytestCheckHook
-    pytestcov
-    pytest-mock
-    pytz
-    simplejson
-    sphinx
-  ];
-
-  # ParserError: Could not parse timezone expression "America/Nuuk"
-  disabledTests = [
-    "test_parse_tz_name_zzz"
-  ];
-
-  meta = with lib; {
-    description = "Python library for date manipulation";
-    homepage = "https://github.com/crsmithdev/arrow";
-    license = licenses.asl20;
-    maintainers = with maintainers; [ thoughtpolice oxzi ];
-  };
-}
diff --git a/pkgs/development/python-modules/arrow/default.nix b/pkgs/development/python-modules/arrow/default.nix
index 93347d7a4b4b1..159ef917f5213 100644
--- a/pkgs/development/python-modules/arrow/default.nix
+++ b/pkgs/development/python-modules/arrow/default.nix
@@ -1,29 +1,39 @@
-{ lib, buildPythonPackage, fetchPypi, isPy27
-, nose, chai, simplejson, backports_functools_lru_cache
-, python-dateutil, pytz, pytest-mock, sphinx, dateparser, pytestcov
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, python-dateutil
+, typing-extensions
 , pytestCheckHook
+, pytest-mock
+, pytz
+, simplejson
 }:
 
 buildPythonPackage rec {
   pname = "arrow";
   version = "1.0.3";
 
+  disabled = pythonOlder "3.6";
+
   src = fetchPypi {
     inherit pname version;
     sha256 = "399c9c8ae732270e1aa58ead835a79a40d7be8aa109c579898eb41029b5a231d";
   };
 
+  postPatch = ''
+    # no coverage reports
+    sed -i "/addopts/d" tox.ini
+  '';
+
   propagatedBuildInputs = [ python-dateutil ]
-    ++ lib.optionals isPy27 [ backports_functools_lru_cache ];
+    ++ lib.optionals (pythonOlder "3.8") [ typing-extensions ];
 
   checkInputs = [
-    dateparser
     pytestCheckHook
-    pytestcov
     pytest-mock
     pytz
     simplejson
-    sphinx
   ];
 
   # ParserError: Could not parse timezone expression "America/Nuuk"
diff --git a/pkgs/development/python-modules/azure-core/default.nix b/pkgs/development/python-modules/azure-core/default.nix
index a63f33d742181..e5394a616e80c 100644
--- a/pkgs/development/python-modules/azure-core/default.nix
+++ b/pkgs/development/python-modules/azure-core/default.nix
@@ -14,14 +14,14 @@
 }:
 
 buildPythonPackage rec {
-  version = "1.13.0";
+  version = "1.14.0";
   pname = "azure-core";
   disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "624b46db407dbed9e03134ab65214efab5b5315949a1fbd6cd592c46fb272588";
+    sha256 = "f32bb64aabe61f496255c16dd6c555a027da628109460bf27311cee0caf78f96";
   };
 
   propagatedBuildInputs = [
@@ -45,8 +45,13 @@ buildPythonPackage rec {
   pytestFlagsArray = [ "tests/" ];
   # disable tests which touch network
   disabledTests = [ "aiohttp" "multipart_send" "response" "request" "timeout" ];
-  # requires testing modules which aren't published, and likely to create cyclic dependencies
-  disabledTestPaths = [ "tests/test_connection_string_parsing.py" ];
+  disabledTestPaths = [
+    # requires testing modules which aren't published, and likely to create cyclic dependencies
+    "tests/test_connection_string_parsing.py"
+    # wants network
+    "tests/async_tests/test_streaming_async.py"
+    "tests/test_streaming.py"
+  ];
 
   meta = with lib; {
     description = "Microsoft Azure Core Library for Python";
diff --git a/pkgs/development/python-modules/azure-eventgrid/default.nix b/pkgs/development/python-modules/azure-eventgrid/default.nix
index e33f89c5a6419..f83040a4b3cef 100644
--- a/pkgs/development/python-modules/azure-eventgrid/default.nix
+++ b/pkgs/development/python-modules/azure-eventgrid/default.nix
@@ -9,12 +9,12 @@
 
 buildPythonPackage rec {
   pname = "azure-eventgrid";
-  version = "4.1.1";
+  version = "4.2.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "c3bd28ccf6c837b58b58fc61275dace5348a823660c3ca21166a88aa2a8377a4";
+    sha256 = "77af2c20abde7d8342da7993781605b440aeac0f95c4af13bb87465c3bd5fe35";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-identity/default.nix b/pkgs/development/python-modules/azure-identity/default.nix
index a0120ae350602..10c455ce072dd 100644
--- a/pkgs/development/python-modules/azure-identity/default.nix
+++ b/pkgs/development/python-modules/azure-identity/default.nix
@@ -17,12 +17,12 @@
 
 buildPythonPackage rec {
   pname = "azure-identity";
-  version = "1.5.0";
+  version = "1.6.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "872adfa760b2efdd62595659b283deba92d47b7a67557eb9ff48f0b5d04ee396";
+    sha256 = "2e70b00874e4f288e37804bc06bfaf216de8565c759594bf79cccfbf9ca2c78a";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-billing/default.nix b/pkgs/development/python-modules/azure-mgmt-billing/default.nix
index d1cb009355de7..91ec3c069c8bf 100644
--- a/pkgs/development/python-modules/azure-mgmt-billing/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-billing/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , msrestazure
 , azure-common
+, azure-mgmt-core
 , azure-mgmt-nspkg
 , python
 , isPy3k
@@ -10,17 +11,18 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-billing";
-  version = "1.0.0"; #pypi's 0.2.0 doesn't build ootb
+  version = "6.0.0"; #pypi's 0.2.0 doesn't build ootb
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8b55064546c8e94839d9f8c98e9ea4b021004b3804e192bf39fa65b603536ad0";
+    sha256 = "d4f5c5a4188a456fe1eb32b6c45f55ca2069c74be41eb76921840b39f2f5c07f";
     extension = "zip";
   };
 
   propagatedBuildInputs = [
     msrestazure
     azure-common
+    azure-mgmt-core
     azure-mgmt-nspkg
   ];
 
diff --git a/pkgs/development/python-modules/azure-mgmt-botservice/default.nix b/pkgs/development/python-modules/azure-mgmt-botservice/default.nix
index ead8dbd3f0153..69dff020c8e7c 100644
--- a/pkgs/development/python-modules/azure-mgmt-botservice/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-botservice/default.nix
@@ -1,21 +1,27 @@
 { lib, buildPythonPackage, fetchPypi, isPy27
 , azure-common
+, azure-mgmt-core
 , msrest
 , msrestazure
 }:
 
 buildPythonPackage rec {
-  version = "0.3.0";
+  version = "1.0.0";
   pname = "azure-mgmt-botservice";
   disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f8318878a66a0685a01bf27b7d1409c44eb90eb72b0a616c1a2455c72330f2f1";
+    sha256 = "9dae4d749a2a072e22703318ea36e379aec20876c553b2889037c7bdec4b9546";
     extension = "zip";
   };
 
-  propagatedBuildInputs = [ azure-common msrest msrestazure ];
+  propagatedBuildInputs = [
+    azure-common
+    azure-mgmt-core
+    msrest
+    msrestazure
+  ];
 
   # no tests included
   doCheck = false;
diff --git a/pkgs/development/python-modules/azure-mgmt-cosmosdb/default.nix b/pkgs/development/python-modules/azure-mgmt-cosmosdb/default.nix
index 46890f7ab5b3a..1531a4e0758f5 100644
--- a/pkgs/development/python-modules/azure-mgmt-cosmosdb/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-cosmosdb/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-cosmosdb";
-  version = "6.2.0";
+  version = "6.3.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "116b5bf9433ad89078c743b617c5b1c51f9ce1a1f128fb2e4bbafb5efb2d2c74";
+    sha256 = "4135104da5b0f3f0a7249abcd8da55936603e50aaaf2868e5f739a717cf20b3d";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-deploymentmanager/default.nix b/pkgs/development/python-modules/azure-mgmt-deploymentmanager/default.nix
index f6be961060e6b..c8f15f5960c17 100644
--- a/pkgs/development/python-modules/azure-mgmt-deploymentmanager/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-deploymentmanager/default.nix
@@ -1,21 +1,27 @@
 { lib, buildPythonPackage, fetchPypi, isPy27
 , azure-common
+, azure-mgmt-core
 , msrest
 , msrestazure
 }:
 
 buildPythonPackage rec {
-  version = "0.2.0";
+  version = "1.0.0";
   pname = "azure-mgmt-deploymentmanager";
   disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0c6pyr36n9snx879vas5r6l25db6nlp2z96xn759mz4kg4i45qs6";
+    sha256 = "9badb768617209149c33e68ca2e59c35b1d3d11427e2969872f2e236e14eee78";
     extension = "zip";
   };
 
-  propagatedBuildInputs = [ azure-common msrest msrestazure ];
+  propagatedBuildInputs = [
+    azure-common
+    azure-mgmt-core
+    msrest
+    msrestazure
+  ];
 
   # no tests included
   doCheck = false;
diff --git a/pkgs/development/python-modules/azure-mgmt-iothub/default.nix b/pkgs/development/python-modules/azure-mgmt-iothub/default.nix
index c51d43ec4447f..f4e1534a61d6d 100644
--- a/pkgs/development/python-modules/azure-mgmt-iothub/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-iothub/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-iothub";
-  version = "1.0.0";
+  version = "2.0.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "7acf24088395a299974dd26406db2686d8d59a3fffbe47c24617b36d445f2de8";
+    sha256 = "653a765f0beb6af0c9ecbd290b4101e1b5e0f6450405faf28ab8234c15d8b38b";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-loganalytics/default.nix b/pkgs/development/python-modules/azure-mgmt-loganalytics/default.nix
index f14aa34c3239f..5a93d3d0df189 100644
--- a/pkgs/development/python-modules/azure-mgmt-loganalytics/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-loganalytics/default.nix
@@ -12,12 +12,12 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-loganalytics";
-  version = "9.0.0";
+  version = "10.0.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "c0b702753c0774a25bcb49b967573b0ec2bef5262c24bc371c219a750ba3c4fd";
+    sha256 = "29330984d0f084dff26cea239d7b733c1a26844da85d33bf3bb53b515ce0bc23";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-maps/default.nix b/pkgs/development/python-modules/azure-mgmt-maps/default.nix
index 69ed75dda307c..8a62fafaea133 100644
--- a/pkgs/development/python-modules/azure-mgmt-maps/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-maps/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-maps";
-  version = "1.0.0";
+  version = "2.0.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "dafbe23bdbe9c01f88ce91c5b8587eefc73ac2d637ebcdc59ded6d332932e3ab";
+    sha256 = "384e17f76a68b700a4f988478945c3a9721711c0400725afdfcb63cf84e85f0e";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-network/default.nix b/pkgs/development/python-modules/azure-mgmt-network/default.nix
index f70c8420c8295..792501b24e710 100644
--- a/pkgs/development/python-modules/azure-mgmt-network/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-network/default.nix
@@ -10,14 +10,14 @@
 }:
 
 buildPythonPackage rec {
-  version = "18.0.0";
+  version = "19.0.0";
   pname = "azure-mgmt-network";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "85fdeb7a1a8d89be9b585396796b218b31b681590d57d82d3ea14cf1f2d20b4a";
+    sha256 = "5e39a26ae81fa58c13c02029700f8c7b22c3fd832a294c543e3156a91b9459e8";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-redhatopenshift/default.nix b/pkgs/development/python-modules/azure-mgmt-redhatopenshift/default.nix
index 323aa26472ca5..1ba00e8617358 100644
--- a/pkgs/development/python-modules/azure-mgmt-redhatopenshift/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-redhatopenshift/default.nix
@@ -5,24 +5,26 @@
 , msrest
 , msrestazure
 , azure-common
+, azure-mgmt-core
 , isPy27
 }:
 
 buildPythonPackage rec {
-  version = "0.1.0";
+  version = "1.0.0";
   pname = "azure-mgmt-redhatopenshift";
   disabled = isPy27; # don't feel like fixing namespace issues on python2
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "1g65lbia1i1jw6qkyjz2ldyl3p90rbr78l8kfryg70sj7z3gnnjn";
+    sha256 = "94cd41f1ebd82e40620fd3e6d88f666b5c19ac7cf8b4e8edadb9721bd7c80980";
   };
 
   propagatedBuildInputs = [
     msrest
     msrestazure
     azure-common
+    azure-mgmt-core
   ];
 
   pythonNamespaces = "azure.mgmt";
diff --git a/pkgs/development/python-modules/azure-mgmt-reservations/default.nix b/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
index 76ef894b96ad1..7e08b16166d7a 100644
--- a/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
@@ -4,24 +4,26 @@
 , msrest
 , msrestazure
 , azure-common
+, azure-mgmt-core
 , azure-mgmt-nspkg
 , isPy3k
 }:
 
 buildPythonPackage rec {
   pname = "azure-mgmt-reservations";
-  version = "0.9.0";
+  version = "1.0.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "1dc97f48f3edb67116da8604ab76ef93233319f56455532be307f323e9ebf0e6";
+    sha256 = "880df54fdf3869ee6b142d4fc7a3fce518c850523c42cc895b7fb8359956554e";
   };
 
   propagatedBuildInputs = [
     msrest
     msrestazure
     azure-common
+    azure-mgmt-core
   ] ++ lib.optionals (!isPy3k) [
     azure-mgmt-nspkg
   ];
diff --git a/pkgs/development/python-modules/azure-mgmt-resource/default.nix b/pkgs/development/python-modules/azure-mgmt-resource/default.nix
index 447b377715d87..9ea6acbe8da79 100644
--- a/pkgs/development/python-modules/azure-mgmt-resource/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-resource/default.nix
@@ -8,14 +8,14 @@
 
 
 buildPythonPackage rec {
-  version = "16.1.0";
+  version = "18.0.0";
   pname = "azure-mgmt-resource";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "b814ee27b37f030fe69461ef6f514661340dc8b1f28736362541e1c0d31d90ae";
+    sha256 = "551036e592f409ef477d30937ea7cc4dda5126576965d9c816fdb8401bbd774c";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-sql/default.nix b/pkgs/development/python-modules/azure-mgmt-sql/default.nix
index 60c1022e60378..e41e13f2b581c 100644
--- a/pkgs/development/python-modules/azure-mgmt-sql/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-sql/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "azure-mgmt-sql";
-  version = "1.0.0";
+  version = "2.0.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "c7904f8798fbb285a2160c41c8bd7a416c6bd987f5d36a9b98c16f41e24e9f47";
+    sha256 = "191accd6e5b47f93a10cebb94e2ca5086f0b6f4afd0290b8596206cd4acb0d5c";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-mgmt-storage/default.nix b/pkgs/development/python-modules/azure-mgmt-storage/default.nix
index 6789a7512a6e6..86c5005c87691 100644
--- a/pkgs/development/python-modules/azure-mgmt-storage/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-storage/default.nix
@@ -8,14 +8,14 @@
 }:
 
 buildPythonPackage rec {
-  version = "17.1.0";
+  version = "18.0.0";
   pname = "azure-mgmt-storage";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "01acb8e988c8082174fa952e1638d700146185644fbe4b126e65843e63d44600";
+    sha256 = "d17beb34273797fa89863632ff0e1eb9b6a55198abb8c7f05d84980762e5f71f";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-servicebus/default.nix b/pkgs/development/python-modules/azure-servicebus/default.nix
index 899c952b3577d..d89def355f9ad 100644
--- a/pkgs/development/python-modules/azure-servicebus/default.nix
+++ b/pkgs/development/python-modules/azure-servicebus/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "azure-servicebus";
-  version = "7.1.1";
+  version = "7.2.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "58797defe666dd17ae11a8895395e7e844f11d2076ba4a9ce63682ac02f665d9";
+    sha256 = "919e81d6d9e6e098dbb7abf51d90282a73c0071846b104e70488417cd5d07863";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/azure-synapse-artifacts/default.nix b/pkgs/development/python-modules/azure-synapse-artifacts/default.nix
index f17c3e5f6bc2b..f9c78b6116fc6 100644
--- a/pkgs/development/python-modules/azure-synapse-artifacts/default.nix
+++ b/pkgs/development/python-modules/azure-synapse-artifacts/default.nix
@@ -6,12 +6,12 @@
 
 buildPythonPackage rec {
   pname = "azure-synapse-artifacts";
-  version = "0.6.0";
+  version = "0.7.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "ec113d37386b8787862baaf9da0318364a008004a377d20fdfca31cfe8d16210";
+    sha256 = "2a538d617dc5d2d167716226d0a24e416324efb35ef22b223e0d9fb6b9889a72";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index 1bf3602a7b106..9b35b5654e263 100644
--- a/pkgs/development/python-modules/cryptography/default.nix
+++ b/pkgs/development/python-modules/cryptography/default.nix
@@ -15,6 +15,7 @@
 , pytest
 , pytest-subtests
 , pretend
+, libiconv
 , iso8601
 , pytz
 , hypothesis
@@ -48,7 +49,7 @@ buildPythonPackage rec {
   ] ++ (with rustPlatform; [ rust.cargo rust.rustc ]);
 
   buildInputs = [ openssl ]
-             ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+             ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security libiconv ];
   propagatedBuildInputs = [
     packaging
     six
@@ -66,8 +67,18 @@ buildPythonPackage rec {
     pytz
   ];
 
+  pytestFlags = lib.concatStringsSep " " ([
+    "--disable-pytest-warnings"
+  ] ++
+    lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+      # aarch64-darwin forbids W+X memory, but this tests depends on it:
+      # * https://cffi.readthedocs.io/en/latest/using.html#callbacks
+      "--ignore=tests/hazmat/backends/test_openssl_memleak.py"
+    ]
+  );
+
   checkPhase = ''
-    py.test --disable-pytest-warnings tests
+    py.test ${pytestFlags} tests
   '';
 
   # IOKit's dependencies are inconsistent between OSX versions, so this is the best we
diff --git a/pkgs/development/python-modules/dbus/default.nix b/pkgs/development/python-modules/dbus/default.nix
index a6e2e28c6f590..8c9eb476fe084 100644
--- a/pkgs/development/python-modules/dbus/default.nix
+++ b/pkgs/development/python-modules/dbus/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, buildPythonPackage, python, pkg-config, dbus, dbus-glib, isPyPy
+{ lib, stdenv, fetchPypi, buildPythonPackage, python, pkg-config, dbus, dbus-glib, isPyPy
 , ncurses, pygobject3, isPy3k }:
 
 buildPythonPackage rec {
@@ -19,6 +19,10 @@ buildPythonPackage rec {
 
   disabled = isPyPy;
 
+  preConfigure = if (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11" && stdenv.isDarwin) then ''
+    MACOSX_DEPLOYMENT_TARGET=10.16
+  '' else null;
+
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ dbus dbus-glib ]
     # My guess why it's sometimes trying to -lncurses.
diff --git a/pkgs/development/python-modules/debugpy/default.nix b/pkgs/development/python-modules/debugpy/default.nix
index 37717f76f3353..059f2110fd531 100644
--- a/pkgs/development/python-modules/debugpy/default.nix
+++ b/pkgs/development/python-modules/debugpy/default.nix
@@ -94,7 +94,7 @@ buildPythonPackage rec {
     description = "An implementation of the Debug Adapter Protocol for Python";
     homepage = "https://github.com/microsoft/debugpy";
     license = licenses.mit;
-    maintainers = with maintainers; [ metadark ];
+    maintainers = with maintainers; [ kira-bruneau ];
     platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" "i686-darwin" ];
   };
 }
diff --git a/pkgs/development/python-modules/delorean/default.nix b/pkgs/development/python-modules/delorean/default.nix
new file mode 100644
index 0000000000000..3435b461d09b6
--- /dev/null
+++ b/pkgs/development/python-modules/delorean/default.nix
@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, Babel
+, humanize
+, python-dateutil
+, tzlocal
+}:
+
+buildPythonPackage rec {
+  pname = "Delorean";
+  version = "1.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0d31ay7yq2w7xz7m3ssk5phjbm64b2k8hmgcif22719k29p7hrzy";
+  };
+
+  propagatedBuildInputs = [ Babel humanize python-dateutil tzlocal ];
+
+  pythonImportsCheck = [ "delorean" ];
+
+  # test data not included
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Delorean: Time Travel Made Easy";
+    homepage = "https://github.com/myusuf3/delorean";
+    license = licenses.mit;
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/flufl/lock.nix b/pkgs/development/python-modules/flufl/lock.nix
index b44a7f3cdfee8..ce2ead246f954 100644
--- a/pkgs/development/python-modules/flufl/lock.nix
+++ b/pkgs/development/python-modules/flufl/lock.nix
@@ -14,6 +14,11 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ atpublic psutil ];
   checkInputs = [ pytestCheckHook pytestcov sybil ];
 
+  # disable code coverage checks for all OS. Upstream does not enforce these
+  # checks on Darwin, and code coverage cannot be improved downstream nor is it
+  # relevant to the user.
+  pytestFlagsArray = [ "--no-cov" ];
+
   meta = with lib; {
     homepage = "https://flufllock.readthedocs.io/";
     description = "NFS-safe file locking with timeouts for POSIX and Windows";
diff --git a/pkgs/development/python-modules/gensim/default.nix b/pkgs/development/python-modules/gensim/default.nix
index b6b6f42b3c35e..b29822a507cde 100644
--- a/pkgs/development/python-modules/gensim/default.nix
+++ b/pkgs/development/python-modules/gensim/default.nix
@@ -4,7 +4,7 @@
 , numpy
 , six
 , scipy
-, smart_open
+, smart-open
 , scikit-learn, testfixtures, unittest2
 , isPy3k
 }:
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     sha256 = "0rx37vnjspjl45v7bj123xwsjfgbwv91v8zpqpli8lgpf42xnskq";
   };
 
-  propagatedBuildInputs = [ smart_open numpy six scipy ];
+  propagatedBuildInputs = [ smart-open numpy six scipy ];
 
   checkInputs = [ scikit-learn testfixtures unittest2 ];
 
diff --git a/pkgs/development/python-modules/get-video-properties/default.nix b/pkgs/development/python-modules/get-video-properties/default.nix
new file mode 100644
index 0000000000000..89e01fedc13d9
--- /dev/null
+++ b/pkgs/development/python-modules/get-video-properties/default.nix
@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, ffmpeg
+}:
+
+buildPythonPackage rec {
+  pname = "get-video-properties";
+  version = "0.1.1";
+
+  src = fetchFromGitHub {
+    owner = "mvasilkov";
+    repo = "python-get-video-properties";
+    rev = "944c68addbc27e320ebc6313d3f016fb69b5e880";
+    sha256 = "18aslx7amaiw31bl9gambmvzry7hp5nqab6kgp8sg3mz9ih4lzal";
+  };
+
+  # no tests
+  doCheck = false;
+
+  postPatch = ''
+    substituteInPlace videoprops/__init__.py \
+      --replace "which('ffprobe')" "'${ffmpeg}/bin/ffprobe'"
+  '';
+
+  pythonImportsCheck = [ "videoprops" ];
+
+  meta = with lib; {
+    description = "Get video properties";
+    homepage = "https://github.com/mvasilkov/python-get-video-properties";
+    license = licenses.mit;
+    maintainers = with maintainers; [ globin ];
+  };
+
+}
diff --git a/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix b/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix
new file mode 100644
index 0000000000000..828f51ae28f45
--- /dev/null
+++ b/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix
@@ -0,0 +1,52 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, codecov
+, pyjwt
+, pylint
+, pytestCheckHook
+, pytestcov
+, python-dateutil
+, requests
+, responses
+, tox
+}:
+
+buildPythonPackage rec {
+  pname = "ibm-cloud-sdk-core";
+  version = "3.9.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1gwx0z6yqlym9af6wnzq5alcrx8pfsywxn18a0yxhm1j00rkyh2i";
+  };
+
+  checkInputs = [
+    codecov
+    pylint
+    pytestCheckHook
+    pytestcov
+    responses
+    tox
+  ];
+
+  propagatedBuildInputs = [
+    pyjwt
+    python-dateutil
+    requests
+  ];
+
+  # Various tests try to access credential files which are not included with the source distribution
+  disabledTests = [
+    "test_iam" "test_cwd" "test_configure_service" "test_get_authenticator"
+    "test_read_external_sources_2" "test_files_duplicate_parts" "test_files_list"
+    "test_files_dict" "test_retry_config_external" "test_gzip_compression_external"
+  ];
+
+  meta = with lib; {
+    description = "Client library for the IBM Cloud services";
+    homepage = "https://github.com/IBM/python-sdk-core";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ globin lheckemann ];
+  };
+}
diff --git a/pkgs/development/python-modules/ibm-watson/default.nix b/pkgs/development/python-modules/ibm-watson/default.nix
new file mode 100644
index 0000000000000..fe8756fde03bb
--- /dev/null
+++ b/pkgs/development/python-modules/ibm-watson/default.nix
@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, responses
+, pytestCheckHook
+, python-dotenv
+, pytest-rerunfailures
+, tox
+, requests
+, python-dateutil
+, websocket_client
+, ibm-cloud-sdk-core
+}:
+
+buildPythonPackage rec {
+  pname = "ibm-watson";
+  version = "5.1.0";
+
+  src = fetchFromGitHub {
+    owner = "watson-developer-cloud";
+    repo = "python-sdk";
+    rev = "v${version}";
+    sha256 = "sha256:16llw7kybwndgf2ryrg5698v4j3rhrdx52lf3kdzhxdi0q3kmwdn";
+  };
+
+  checkInputs = [
+    responses
+    pytestCheckHook
+    python-dotenv
+    pytest-rerunfailures
+    tox
+  ];
+
+  propagatedBuildInputs = [
+    requests
+    python-dateutil
+    websocket_client
+    ibm-cloud-sdk-core
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace websocket-client==0.48.0 websocket-client>=0.48.0 \
+      --replace ibm_cloud_sdk_core==3.3.6 ibm_cloud_sdk_core>=3.3.6
+  '';
+
+  meta = with lib; {
+    description = "Client library to use the IBM Watson Services";
+    homepage = "https://github.com/watson-developer-cloud/python-sdk";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ globin lheckemann ];
+  };
+}
diff --git a/pkgs/development/python-modules/johnnycanencrypt/default.nix b/pkgs/development/python-modules/johnnycanencrypt/default.nix
index d2d4719dab4b6..a8ce23d371f8b 100644
--- a/pkgs/development/python-modules/johnnycanencrypt/default.nix
+++ b/pkgs/development/python-modules/johnnycanencrypt/default.nix
@@ -37,8 +37,6 @@ buildPythonPackage rec {
 
   patches = [ ./Cargo.lock.patch ];
 
-  cargoSha256 = "0ifvpdizcdp2c5x2x2j1bhhy5a75q0pk7a63dmh52mlpmh45fy6r";
-
   LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/jupyter_server/default.nix b/pkgs/development/python-modules/jupyter_server/default.nix
index 50f193c2058c8..e444b2ea3c0db 100644
--- a/pkgs/development/python-modules/jupyter_server/default.nix
+++ b/pkgs/development/python-modules/jupyter_server/default.nix
@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
@@ -71,6 +72,9 @@ buildPythonPackage rec {
     "test_list_formats"
     "test_base_url"
     "test_culling"
+  ] ++ lib.optionals stdenv.isDarwin [
+    # attempts to use trashcan, build env doesn't allow this
+    "test_delete"
   ];
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/matrix-api-async/default.nix b/pkgs/development/python-modules/matrix-api-async/default.nix
new file mode 100644
index 0000000000000..d7ae05bddc968
--- /dev/null
+++ b/pkgs/development/python-modules/matrix-api-async/default.nix
@@ -0,0 +1,25 @@
+{ lib, buildPythonPackage, fetchPypi, matrix-client }:
+
+buildPythonPackage rec {
+  pname = "matrix_api_async";
+  version = "0.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0xdx8fci0lar3x09dwqgka6ssz9d3g7gsfx4yyr13sdwza7zsqc3";
+  };
+
+  propagatedBuildInputs = [ matrix-client ];
+
+  # no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "matrix_api_async" ];
+
+  meta = with lib; {
+    description = "An asyncio wrapper of matrix_client.api";
+    license = licenses.mit;
+    homepage = "https://github.com/Cadair/matrix_api_async";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/mattermostdriver/default.nix b/pkgs/development/python-modules/mattermostdriver/default.nix
new file mode 100644
index 0000000000000..7d9421b5d9490
--- /dev/null
+++ b/pkgs/development/python-modules/mattermostdriver/default.nix
@@ -0,0 +1,33 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, websockets
+, requests
+}:
+
+buildPythonPackage rec {
+  pname = "mattermostdriver";
+  version = "7.3.0";
+
+  disabled = pythonOlder "3.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "17jqcpa1xd9n7bf4d5l7wmscls34kymv27gi17pyyfjxbwk5gsga";
+  };
+
+  propagatedBuildInputs = [ websockets requests ];
+
+  pythonImportsCheck = [ "mattermostdriver" ];
+
+  # no tests
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A Python Mattermost Driver";
+    homepage = "https://github.com/Vaelor/python-mattermost-driver";
+    license = licenses.mit;
+    maintainers = with maintainers; [ globin lheckemann ];
+  };
+}
diff --git a/pkgs/development/python-modules/mockupdb/default.nix b/pkgs/development/python-modules/mockupdb/default.nix
new file mode 100644
index 0000000000000..341660e1af0bc
--- /dev/null
+++ b/pkgs/development/python-modules/mockupdb/default.nix
@@ -0,0 +1,24 @@
+{ lib, buildPythonPackage, fetchPypi
+, pymongo
+}:
+
+buildPythonPackage rec {
+  pname = "mockupdb";
+  version = "1.8.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "130z5g96r52h362qc5jbf1g3gw3irb2wr946xlhgcv9ww9z64cl8";
+  };
+
+  propagatedBuildInputs = [ pymongo ];
+
+  pythonImportsCheck = [ "mockupdb" ];
+
+  meta = with lib; {
+    description = "Simulate a MongoDB server";
+    license = licenses.asl20;
+    homepage = "https://github.com/ajdavis/mongo-mockup-db";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/motor/default.nix b/pkgs/development/python-modules/motor/default.nix
new file mode 100644
index 0000000000000..318d519e57ceb
--- /dev/null
+++ b/pkgs/development/python-modules/motor/default.nix
@@ -0,0 +1,30 @@
+{ lib, buildPythonPackage, fetchFromGitHub
+, pymongo, mockupdb
+}:
+
+buildPythonPackage rec {
+  pname = "motor";
+  version = "2.4.0";
+
+  src = fetchFromGitHub {
+    owner = "mongodb";
+    repo = pname;
+    rev = version;
+    sha256 = "1sgaqg98h35lazzdi015q1i60ig7krid8b10a5rm6lf755y8yj2c";
+  };
+
+  propagatedBuildInputs = [ pymongo ];
+
+  # network connections
+  doCheck = false;
+  checkInputs = [ mockupdb ];
+
+  pythonImportsCheck = [ "motor" ];
+
+  meta = with lib; {
+    description = "Non-blocking MongoDB driver for Tornado or asyncio";
+    license = licenses.asl20;
+    homepage = "https://github.com/mongodb/motor";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/opsdroid_get_image_size/default.nix b/pkgs/development/python-modules/opsdroid_get_image_size/default.nix
new file mode 100644
index 0000000000000..0f33da44145f3
--- /dev/null
+++ b/pkgs/development/python-modules/opsdroid_get_image_size/default.nix
@@ -0,0 +1,24 @@
+{ lib, buildPythonPackage, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "opsdroid_get_image_size";
+  version = "0.2.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "124j2xvfxv09q42qfb8nqlcn55y7f09iayrix3yfyrs2qyzav78a";
+  };
+
+  # test data not included on pypi
+  doCheck = false;
+
+  pythonImportsCheck = [ "get_image_size" ];
+
+  meta = with lib; {
+    description = "Get image width and height given a file path using minimal dependencies";
+    license = licenses.mit;
+    homepage = "https://github.com/opsdroid/image_size";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/pathy/default.nix b/pkgs/development/python-modules/pathy/default.nix
index 714e6945df5f2..d656a752cf550 100644
--- a/pkgs/development/python-modules/pathy/default.nix
+++ b/pkgs/development/python-modules/pathy/default.nix
@@ -4,7 +4,7 @@
 , pytestCheckHook
 , typer
 , dataclasses
-, smart_open
+, smart-open
 , pytest
 , mock
 , google-cloud-storage
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     sha256 = "sha256-nb8my/5rkc7thuHnXZHe1Hg8j+sLBlYyJcLHWrrKZ5M=";
   };
 
-  propagatedBuildInputs = [ smart_open typer google-cloud-storage ];
+  propagatedBuildInputs = [ smart-open typer google-cloud-storage ];
 
   postPatch = ''
     substituteInPlace requirements.txt \
diff --git a/pkgs/development/python-modules/psutil/default.nix b/pkgs/development/python-modules/psutil/default.nix
index a53005c7426ab..ba17c5eca737f 100644
--- a/pkgs/development/python-modules/psutil/default.nix
+++ b/pkgs/development/python-modules/psutil/default.nix
@@ -15,16 +15,25 @@ buildPythonPackage rec {
     sha256 = "1immnj532bnnrh1qmk5q3lsw3san8qfk9kxy1cpmy0knmfcwp70c";
   };
 
-  # arch doesn't report frequency is the same way
-  # tests segfaults on darwin https://github.com/giampaolo/psutil/issues/1715
-  doCheck = !stdenv.isDarwin && stdenv.isx86_64;
+  # We have many test failures on various parts of the package:
+  #  - segfaults on darwin:
+  #    https://github.com/giampaolo/psutil/issues/1715
+  #  - swap (on linux) might cause test failures if it is fully used:
+  #    https://github.com/giampaolo/psutil/issues/1911
+  #  - some mount paths are required in the build sanbox to make the tests succeed:
+  #    https://github.com/giampaolo/psutil/issues/1912
+  doCheck = false;
   checkInputs = [ pytestCheckHook ]
-    ++ lib.optionals isPy27 [ mock ipaddress unittest2 ];
+  ++ lib.optionals isPy27 [ mock ipaddress unittest2 ];
+  # In addition to the issues listed above there are some that occure due to
+  # our sandboxing which we can work around by disabling some tests:
+  # - cpu_times was flaky on darwin
+  # - the other disabled tests are likely due to sanboxing (missing specific errors)
   pytestFlagsArray = [
     "$out/${python.sitePackages}/psutil/tests/test_system.py"
   ];
-  # disable tests which don't work in sandbox
-  # cpu_times is flakey on darwin
+
+  # Note: $out must be referenced as test import paths are relative
   disabledTests = [
     "user"
     "disk_io_counters"
diff --git a/pkgs/development/python-modules/puremagic/default.nix b/pkgs/development/python-modules/puremagic/default.nix
new file mode 100644
index 0000000000000..c635cdac186af
--- /dev/null
+++ b/pkgs/development/python-modules/puremagic/default.nix
@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "puremagic";
+  version = "1.10";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "025ih5q1qa40x88j7ngsdr5sf0dp400kwlfzz60i7v6fh0ms1zkg";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace '"argparse"' ""
+  '';
+
+  # test data not included on pypi
+  doCheck = false;
+
+  pythonImportsCheck = [ "puremagic" ];
+
+  meta = with lib; {
+    description = "Pure python implementation of magic file detection";
+    license = licenses.mit;
+    homepage = "https://github.com/cdgriffith/puremagic";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/pybind11/default.nix b/pkgs/development/python-modules/pybind11/default.nix
index 0ae0b26e12db1..3bd88368e7536 100644
--- a/pkgs/development/python-modules/pybind11/default.nix
+++ b/pkgs/development/python-modules/pybind11/default.nix
@@ -23,6 +23,14 @@ buildPythonPackage rec {
     sha256 = "1lsacpawl2gb5qlh0cawj9swsyfbwhzhwiv6553a7lsigdbadqpy";
   };
 
+  patches = [
+    # fix pybind11Config.cmake
+    (fetchpatch {
+      url = "https://github.com/pybind/pybind11/commit/d9c4e1047a95f023633a7260af5a633307438941.patch";
+      sha256 = "0kran295kj31xfs6mfha5ip132zd0pnj2dl36qzgyc1rpnha5gz4";
+    })
+  ];
+
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ catch ];
diff --git a/pkgs/development/python-modules/pycron/default.nix b/pkgs/development/python-modules/pycron/default.nix
new file mode 100644
index 0000000000000..7155ee95723ea
--- /dev/null
+++ b/pkgs/development/python-modules/pycron/default.nix
@@ -0,0 +1,30 @@
+{ lib, buildPythonPackage, fetchFromGitHub, udatetime, pytz, pendulum, nose
+, delorean, coveralls, arrow
+}:
+
+buildPythonPackage rec {
+  pname = "pycron";
+  version = "3.0.0";
+
+  src = fetchFromGitHub {
+    owner = "kipe";
+    repo = pname;
+    rev = version;
+    sha256 = "12hkqrdfg3jbqkmck8i00ssyaw1c4hhvdhjxkmh2gm9pd99z5bpv";
+  };
+
+  checkInputs = [ arrow coveralls delorean nose pendulum pytz udatetime ];
+
+  checkPhase = ''
+    nosetests
+  '';
+
+  pythonImportsCheck = [ "pycron" ];
+
+  meta = with lib; {
+    description = "Simple cron-like parser for Python, which determines if current datetime matches conditions";
+    license = licenses.mit;
+    homepage = "https://github.com/kipe/pycron";
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/pygls/default.nix b/pkgs/development/python-modules/pygls/default.nix
index edd5d9bc3100e..1d08de404f0b4 100644
--- a/pkgs/development/python-modules/pygls/default.nix
+++ b/pkgs/development/python-modules/pygls/default.nix
@@ -25,6 +25,6 @@ buildPythonPackage rec {
     description = "Pythonic generic implementation of the Language Server Protocol";
     homepage = "https://github.com/openlawlibrary/pygls";
     license = licenses.asl20;
-    maintainers = with maintainers; [ metadark ];
+    maintainers = with maintainers; [ kira-bruneau ];
   };
 }
diff --git a/pkgs/development/python-modules/pymumble/default.nix b/pkgs/development/python-modules/pymumble/default.nix
index 45c193899fe02..d708f5f229b56 100644
--- a/pkgs/development/python-modules/pymumble/default.nix
+++ b/pkgs/development/python-modules/pymumble/default.nix
@@ -11,23 +11,15 @@
 
 buildPythonPackage rec {
   pname = "pymumble";
-  version = "1.6";
+  version = "1.6.1";
   disabled = isPy27;
 
   src = fetchFromGitHub {
     owner = "azlux";
     repo = "pymumble";
     rev = version;
-    sha256 = "04nc66d554a98mbmdgzgsg6ncaz0jsn4zdr3mr14w6wnhrxpjkrs";
+    sha256 = "1qbsd2zvwd9ksclgiyrl1z79ms0zximm4527mnmhvq36lykgki7s";
   };
-  patches = [
-    # Compatibility with pycryptodome (which is what our pycrypto really is)
-    # See https://github.com/azlux/pymumble/pull/99
-    (fetchpatch {
-      url = "https://github.com/azlux/pymumble/pull/99/commits/b85548a0e1deaac820954b1c0b308af214311a14.patch";
-      sha256 = "0w9dpc87rny6vmhi634pih1p97b67jm26qajscpa9wp6nphdlxlj";
-    })
-  ];
 
   postPatch = ''
     # Changes all `library==x.y.z` statements to just `library`
@@ -35,11 +27,20 @@ buildPythonPackage rec {
     sed -i 's/\(.*\)==.*/\1/' requirements.txt
   '';
 
-  propagatedBuildInputs = [ opuslib protobuf ];
+  propagatedBuildInputs = [
+    opuslib
+    protobuf
+  ];
 
-  checkInputs = [ pytestCheckHook pycrypto ];
+  checkInputs = [
+    pycrypto
+    pytestCheckHook
+  ];
 
-  pythonImportsCheck = [ "pymumble_py3" ];
+  pythonImportsCheck = [
+    "pymumble_py3"
+    "pymumble_py3.constants"
+  ];
 
   meta = with lib; {
     description = "Python 3 version of pymumble, Mumble library used for multiple uses like making mumble bot.";
diff --git a/pkgs/development/python-modules/pytest-datadir/default.nix b/pkgs/development/python-modules/pytest-datadir/default.nix
index 1dc218c08085c..6acdecf5d88cd 100644
--- a/pkgs/development/python-modules/pytest-datadir/default.nix
+++ b/pkgs/development/python-modules/pytest-datadir/default.nix
@@ -27,6 +27,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/gabrielcnr/pytest-datadir";
     description = "pytest plugin for manipulating test data directories and files";
     license = licenses.mit;
-    maintainers = with maintainers; [ metadark ];
+    maintainers = with maintainers; [ kira-bruneau ];
   };
 }
diff --git a/pkgs/development/python-modules/pytorch/default.nix b/pkgs/development/python-modules/pytorch/default.nix
index 59a8c74f709ce..8fae54c846608 100644
--- a/pkgs/development/python-modules/pytorch/default.nix
+++ b/pkgs/development/python-modules/pytorch/default.nix
@@ -6,7 +6,7 @@
   cudaArchList ? null,
 
   # Native build inputs
-  cmake, util-linux, linkFarm, symlinkJoin, which,
+  cmake, util-linux, linkFarm, symlinkJoin, which, pybind11,
 
   # Build inputs
   numactl,
@@ -216,6 +216,7 @@ in buildPythonPackage rec {
     util-linux
     which
     ninja
+    pybind11
   ] ++ lib.optionals cudaSupport [ cudatoolkit_joined ];
 
   buildInputs = [ blas blas.provider ]
diff --git a/pkgs/development/python-modules/pyvex/default.nix b/pkgs/development/python-modules/pyvex/default.nix
index 618dfef4171cd..c9fbedbbfd4ff 100644
--- a/pkgs/development/python-modules/pyvex/default.nix
+++ b/pkgs/development/python-modules/pyvex/default.nix
@@ -18,6 +18,10 @@ buildPythonPackage rec {
     sha256 = "sha256-cWQdrGKJyGieBow3TiMj/uB2crIF32Kvl5tVUKg/z+E=";
   };
 
+  postPatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace vex/Makefile-gcc --replace '/usr/bin/ar' 'ar'
+  '';
+
   propagatedBuildInputs = [
     archinfo
     bitstring
diff --git a/pkgs/development/python-modules/smart_open/default.nix b/pkgs/development/python-modules/smart-open/default.nix
index 4f3423b7df320..051d6c97397d6 100644
--- a/pkgs/development/python-modules/smart_open/default.nix
+++ b/pkgs/development/python-modules/smart-open/default.nix
@@ -12,12 +12,13 @@
 }:
 
 buildPythonPackage rec {
-  pname = "smart_open";
+  pname = "smart-open";
   version = "4.2.0";
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "smart_open";
+    inherit version;
     sha256 = "d9f5a0f173ccb9bbae528db5a3804f57145815774f77ef755b9b0f3b4b2a9dcb";
   };
 
@@ -29,9 +30,10 @@ buildPythonPackage rec {
 
   # upstream code requires both boto and boto3
   propagatedBuildInputs = [ boto boto3 bz2file requests ];
+
   meta = {
     license = lib.licenses.mit;
-    description = "smart_open is a Python 2 & Python 3 library for efficient streaming of very large file";
+    description = "Library for efficient streaming of very large file";
     maintainers = with lib.maintainers; [ jyp ];
   };
 }
diff --git a/pkgs/development/python-modules/token-bucket/default.nix b/pkgs/development/python-modules/token-bucket/default.nix
new file mode 100644
index 0000000000000..ac614d53fd5af
--- /dev/null
+++ b/pkgs/development/python-modules/token-bucket/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestrunner
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "token-bucket";
+  version = "0.2.0";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "falconry";
+    repo = pname;
+    rev = version;
+    sha256 = "0kv8j2ab4knvzik2di66bgjwjxdslm2i0hjy35kn9z0dazni585s";
+  };
+
+  nativeBuildInputs = [
+    pytestrunner
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  meta = with lib; {
+    description = "Token Bucket Implementation for Python Web Apps";
+    homepage = "https://github.com/falconry/token-bucket";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ hexa ];
+  };
+}
diff --git a/pkgs/development/python-modules/udatetime/default.nix b/pkgs/development/python-modules/udatetime/default.nix
new file mode 100644
index 0000000000000..457020af6457e
--- /dev/null
+++ b/pkgs/development/python-modules/udatetime/default.nix
@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchpatch
+}:
+
+buildPythonPackage rec {
+  pname = "udatetime";
+  version = "0.0.16";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "09vlcskvaxnfk73l9w5xgl2ks9l62g1b24yrm0xxb7gn93qxglw2";
+  };
+
+  patches = [
+    # fix build with python 3.9
+    (fetchpatch {
+      url = "https://github.com/freach/udatetime/pull/33.patch";
+      sha256 = "02wm7ivkv1viqn2wflgd10dgpddfqfrwacmrldigb1mwb79n554j";
+    })
+  ];
+
+  # tests not included on pypi
+  doCheck = false;
+
+  pythonImportsCheck = [ "udatetime" ];
+
+  meta = with lib; {
+    description = "Fast RFC3339 compliant Python date-time library";
+    homepage = "https://github.com/freach/udatetime";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ globin ];
+  };
+}
diff --git a/pkgs/development/python-modules/vdf/default.nix b/pkgs/development/python-modules/vdf/default.nix
index 846aa7a13dfc6..70ddf7bec97ab 100644
--- a/pkgs/development/python-modules/vdf/default.nix
+++ b/pkgs/development/python-modules/vdf/default.nix
@@ -1,24 +1,28 @@
-{ lib, buildPythonPackage, fetchFromGitHub
-, pytest, pytestcov, mock }:
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, mock
+, pytestCheckHook
+}:
 
 buildPythonPackage rec {
   pname = "vdf";
-  version = "3.3";
+  version = "3.4";
 
   src = fetchFromGitHub {
     owner = "ValvePython";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0d9bhxdznry7kzyma00cxwjn6rqnd6vw8v5ym68k6qswgfzb569i";
+    hash = "sha256-6ozglzZZNKDtADkHwxX2Zsnkh6BE8WbcRcC9HkTTgPU=";
   };
 
-  checkInputs = [ pytest pytestcov mock ];
-  checkPhase = "make test";
+  checkInputs = [ mock pytestCheckHook ];
+  pythonImportsCheck = [ "vdf" ];
 
   meta = with lib; {
     description = "Library for working with Valve's VDF text format";
     homepage = "https://github.com/ValvePython/vdf";
     license = licenses.mit;
-    maintainers = with maintainers; [ metadark ];
+    maintainers = with maintainers; [ kira-bruneau ];
   };
 }
diff --git a/pkgs/development/python-modules/watchgod/default.nix b/pkgs/development/python-modules/watchgod/default.nix
new file mode 100644
index 0000000000000..5bb8425864226
--- /dev/null
+++ b/pkgs/development/python-modules/watchgod/default.nix
@@ -0,0 +1,27 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "watchgod";
+  version = "0.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0aagm0n5fkpzdsfgl0r21gkz5qaicgq3f4rqz2fdvsgbn1i0s528";
+  };
+
+  # no tests in release
+  doCheck = false;
+
+  pythonImportsCheck = [ "watchgod" ];
+
+  meta = with lib; {
+    description = "Simple, modern file watching and code reload in python";
+    homepage = "https://github.com/samuelcolvin/watchgod";
+    license = licenses.mit;
+    maintainers = with maintainers; [ globin ];
+  };
+
+}
diff --git a/pkgs/development/python-modules/xdg/default.nix b/pkgs/development/python-modules/xdg/default.nix
index e47a91fb993b9..2ea4e5bedf8bc 100644
--- a/pkgs/development/python-modules/xdg/default.nix
+++ b/pkgs/development/python-modules/xdg/default.nix
@@ -5,7 +5,7 @@
 }:
 
 buildPythonPackage rec {
-  version = "5.0.1";
+  version = "5.0.2";
   pname = "xdg";
   disabled = isPy27;
   format = "pyproject";
@@ -14,7 +14,7 @@ buildPythonPackage rec {
     owner = "srstevenson";
     repo = pname;
     rev = version;
-    sha256 = "sha256-WMY9Hs9SbErTp8hVBoCWTz4dLQhuzqTRpXFEyE7+woo=";
+    sha256 = "sha256-wZfihMrq83Bye5CE5p7bTlI9Z7CsCkSd8Art5ws4vsY=";
   };
 
   nativeBuildInputs = [ poetry-core ];
diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 1a09ce60c044e..5f054e6b9962f 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -528,6 +528,14 @@ in
       "--with-libvirt-include=${libvirt}/include"
       "--with-libvirt-lib=${libvirt}/lib"
     ];
+    dontBuild = false;
+    postPatch = ''
+      # https://gitlab.com/libvirt/libvirt-ruby/-/commit/43543991832c9623c00395092bcfb9e178243ba4
+      substituteInPlace ext/libvirt/common.c \
+        --replace 'st.h' 'ruby/st.h'
+      substituteInPlace ext/libvirt/domain.c \
+        --replace 'st.h' 'ruby/st.h'
+    '';
   };
 
   ruby-lxc = attrs: {
diff --git a/pkgs/development/tools/analysis/bingrep/default.nix b/pkgs/development/tools/analysis/bingrep/default.nix
index 338bc3e189c14..d354b71fc9f3f 100644
--- a/pkgs/development/tools/analysis/bingrep/default.nix
+++ b/pkgs/development/tools/analysis/bingrep/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-ayA3aEidZPa5GJgbbm5K3X2Xgd5Eb6TgUU80Gw/p07w=";
   };
 
-  cargoSha256 = "sha256-3eGYU5O7HSpawIL/8OVmROCzXfdnoMAnIujjrIp00xg=";
+  cargoSha256 = "sha256-XcXllex7UEufV5URhH7aqln1tNxwaiAETO3fUKmHf7s=";
 
   meta = with lib; {
     description = "Greps through binaries from various OSs and architectures, and colors them";
diff --git a/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix b/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
index a0f251bfe9105..66f2db2806854 100644
--- a/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
+++ b/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   ];
   buildInputs = [ openssl ];
 
-  cargoSha256 = "0pn9xgryfb7f0plx50v9i7hsv1wib87pi0fl43cv6hgqyrdb52ny";
+  cargoSha256 = "1hpi9aifn3g19yqkb58lphyw8cbsqllhg5dzbqx15hcfvrb7ip4k";
   #checkFlags = [ "--test-threads" "1" ];
   doCheck = false;
 
diff --git a/pkgs/development/tools/analysis/dotenv-linter/default.nix b/pkgs/development/tools/analysis/dotenv-linter/default.nix
index b05f9b944400d..f477da365d753 100644
--- a/pkgs/development/tools/analysis/dotenv-linter/default.nix
+++ b/pkgs/development/tools/analysis/dotenv-linter/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-3Lj5GtWGyWDkZPhxYQu7UWzmh7TO5wk1UJ0lek1jTto=";
   };
 
-  cargoSha256 = "sha256-zdvIC+VUASjhrlyRts+JJeh5xdcdpX6Ixle6HhbMJJU=";
+  cargoSha256 = "sha256-FDkxJuZPzDrgLJgefkRUPS+0Ys3DaBOD3XAuS/Z6TtI=";
 
   meta = with lib; {
     description = "Lightning-fast linter for .env files. Written in Rust";
diff --git a/pkgs/development/tools/analysis/panopticon/default.nix b/pkgs/development/tools/analysis/panopticon/default.nix
index f7f933392ab4c..500ca632fcf0f 100644
--- a/pkgs/development/tools/analysis/panopticon/default.nix
+++ b/pkgs/development/tools/analysis/panopticon/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   dontWrapQtApps = true;
 
-  cargoSha256 = "1hdsn011y9invfy7can8c02zwa7birj9y1rxhrj7wyv4gh3659i0";
+  cargoSha256 = "0vhcb3kw1zgchx3nrk8lyrz8p5071y99vsysxvi71klv7dcvn0am";
   doCheck = false;
 
   postInstall = ''
diff --git a/pkgs/development/tools/analysis/qcachegrind/default.nix b/pkgs/development/tools/analysis/qcachegrind/default.nix
index 5e321db01aa4b..75729d1eea470 100644
--- a/pkgs/development/tools/analysis/qcachegrind/default.nix
+++ b/pkgs/development/tools/analysis/qcachegrind/default.nix
@@ -17,7 +17,7 @@ in stdenv.mkDerivation {
   postInstall = ''
      mkdir -p $out/bin
      cp -p converters/dprof2calltree $out/bin/dprof2calltree
-     cp -p converters/hotshot2calltree.cmake $out/bin/hotshot2calltree
+     cp -p converters/hotshot2calltree.in $out/bin/hotshot2calltree
      cp -p converters/memprof2calltree $out/bin/memprof2calltree
      cp -p converters/op2calltree $out/bin/op2calltree
      cp -p converters/pprof2calltree $out/bin/pprof2calltree
diff --git a/pkgs/development/tools/analysis/svlint/default.nix b/pkgs/development/tools/analysis/svlint/default.nix
index a562a1baeeeb3..dc38728a44a26 100644
--- a/pkgs/development/tools/analysis/svlint/default.nix
+++ b/pkgs/development/tools/analysis/svlint/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-p002oWwTQxesWLgLq8oKKzuZKXUdO4C1TZ7lR/Mh1PA=";
   };
 
-  cargoSha256 = "sha256-M0hng1JcR5Q829bVOaTASl0Eq6fFm8mUFsS5zx1JX94=";
+  cargoSha256 = "sha256-1WEPJpU/hLn+qjU+ETkmbfZIJTORe3OUdyl605JnYmU=";
 
   meta = with lib; {
     description = "SystemVerilog linter";
diff --git a/pkgs/development/tools/async/default.nix b/pkgs/development/tools/async/default.nix
index a45e93ab151ef..ffff8af8b6612 100644
--- a/pkgs/development/tools/async/default.nix
+++ b/pkgs/development/tools/async/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "19ypflbayi5l0mb8yw7w0a4bq9a3w8nl9jsxapp9m3xggzmsvrxx";
   };
 
-  cargoSha256 = "1zgds5rjjikvaj0rxc7slyvkjn067s0v8vdnxn3vsv819q5yd707";
+  cargoSha256 = "0y2q46i838gha58p95vcv5r5i14il1kv86k35s30ncfibijgp0lc";
 
   meta = with lib; {
     description = "A tool to parallelize shell commands";
diff --git a/pkgs/development/tools/build-managers/cmake/default.nix b/pkgs/development/tools/build-managers/cmake/default.nix
index d146050746607..b04eac35b05cf 100644
--- a/pkgs/development/tools/build-managers/cmake/default.nix
+++ b/pkgs/development/tools/build-managers/cmake/default.nix
@@ -7,19 +7,14 @@
 , useSharedLibraries ? (!isBootstrap && !stdenv.isCygwin)
 , useOpenSSL ? !isBootstrap, openssl
 , useNcurses ? false, ncurses
-, useQt4 ? false, qt4
 , withQt5 ? false, qtbase
 }:
 
-assert withQt5 -> useQt4 == false;
-assert useQt4 -> withQt5 == false;
-
 stdenv.mkDerivation (rec {
   pname = "cmake"
           + lib.optionalString isBootstrap "-boot"
           + lib.optionalString useNcurses "-cursesUI"
-          + lib.optionalString withQt5 "-qt5UI"
-          + lib.optionalString useQt4 "-qt4UI";
+          + lib.optionalString withQt5 "-qt5UI";
   version = "3.19.7";
 
   src = fetchurl {
@@ -53,7 +48,6 @@ stdenv.mkDerivation (rec {
     ++ lib.optionals useSharedLibraries [ bzip2 curlMinimal expat libarchive xz zlib libuv rhash ]
     ++ lib.optional useOpenSSL openssl
     ++ lib.optional useNcurses ncurses
-    ++ lib.optional useQt4 qt4
     ++ lib.optional withQt5 qtbase;
 
   propagatedBuildInputs = lib.optional stdenv.isDarwin ps;
@@ -73,7 +67,7 @@ stdenv.mkDerivation (rec {
   configureFlags = [
     "--docdir=share/doc/${pname}${version}"
   ] ++ (if useSharedLibraries then [ "--no-system-jsoncpp" "--system-libs" ] else [ "--no-system-libs" ]) # FIXME: cleanup
-    ++ lib.optional (useQt4 || withQt5) "--qt-gui"
+    ++ lib.optional withQt5 "--qt-gui"
     # Workaround https://gitlab.kitware.com/cmake/cmake/-/issues/20568
     ++ lib.optionals stdenv.hostPlatform.is32bit [
       "CFLAGS=-D_FILE_OFFSET_BITS=64"
@@ -124,7 +118,7 @@ stdenv.mkDerivation (rec {
       configuration files, and generate native makefiles and workspaces that
       can be used in the compiler environment of your choice.
     '';
-    platforms = if useQt4 then qt4.meta.platforms else platforms.all;
+    platforms = platforms.all;
     maintainers = with maintainers; [ ttuegel lnl7 ];
     license = licenses.bsd3;
   };
diff --git a/pkgs/development/tools/build-managers/fac/default.nix b/pkgs/development/tools/build-managers/fac/default.nix
index 601f7ea9fea0a..0d62642e032c0 100644
--- a/pkgs/development/tools/build-managers/fac/default.nix
+++ b/pkgs/development/tools/build-managers/fac/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   # workaround for missing Cargo.lock file
   cargoPatches = [ ./cargo-lock.patch ];
 
-  cargoSha256 = "0hjfq61y1ikdcajr2k514k7fad2zxbwq7yb5nk1wx38f1524709q";
+  cargoSha256 = "033wif3wwm3912ppw0gshsyjxipilg9hhvkijw29zmjfm6074b21";
 
   # fac includes a unit test called ls_files_works which assumes it's
   # running in a git repo. Nix's sandbox runs cargo build outside git,
diff --git a/pkgs/development/tools/bunyan-rs/default.nix b/pkgs/development/tools/bunyan-rs/default.nix
new file mode 100644
index 0000000000000..12ced94c81b7b
--- /dev/null
+++ b/pkgs/development/tools/bunyan-rs/default.nix
@@ -0,0 +1,25 @@
+{ rustPlatform
+, fetchFromGitHub
+, lib
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "bunyan-rs";
+  version = "0.1.2";
+
+  src = fetchFromGitHub {
+    owner = "LukeMathWalker";
+    repo = "bunyan";
+    rev = "v${version}";
+    sha256 = "sha256-Rj0VoJMcl8UBuVNu88FwTNF1GBx8IEXxwLL8sGz9kVM=";
+  };
+
+  cargoSha256 = "sha256-UZAiXLbRhr2J7QFf7x+JbEjc6p2AoVHYMgyARuwaB7E=";
+
+  meta = with lib; {
+    description = "A CLI to pretty print logs in bunyan format (Rust port of the original JavaScript bunyan CLI)";
+    homepage = "https://github.com/LukeMathWalker/bunyan";
+    license = with licenses; [ asl20 mit ];
+    maintainers = with maintainers; [ netcrns ];
+  };
+}
diff --git a/pkgs/development/tools/cargo-flamegraph/default.nix b/pkgs/development/tools/cargo-flamegraph/default.nix
index 3bdbb086d1dd3..65a49551035d7 100644
--- a/pkgs/development/tools/cargo-flamegraph/default.nix
+++ b/pkgs/development/tools/cargo-flamegraph/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-IpmvFUWNaFQ1ls7u625vvj1TnRYXR+X1mAGdBcwRFLk=";
   };
 
-  cargoSha256 = "sha256-2YHkEQZqjKEvg4h9kIVhqmgq+SMF1c3r8UbSQivZh7w=";
+  cargoSha256 = "sha256-ccy5ZFS2Gp4Dwo8gsS6vzHHO1siicOp7uZTsCh6SKsM=";
 
   nativeBuildInputs = lib.optionals stdenv.isLinux [ makeWrapper ];
   buildInputs = lib.optionals stdenv.isDarwin [
diff --git a/pkgs/development/tools/cargo-web/default.nix b/pkgs/development/tools/cargo-web/default.nix
index c85ef52564a4d..2c35e951cda13 100644
--- a/pkgs/development/tools/cargo-web/default.nix
+++ b/pkgs/development/tools/cargo-web/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1dl5brj5fnmxmwl130v36lvy4j64igdpdvjwmxw3jgg2c6r6b7cd";
   };
 
-  cargoSha256 = "0i9xp7vd1rp6xgkbbrspm3qq4hxwfwa00di3k73z1x64d3d8r5fm";
+  cargoSha256 = "0q7yxvvngfvn4s889qzp1qnsw2c6qy2ryv9vz9cxhmqidx4dg4va";
 
   nativeBuildInputs = [ openssl perl pkg-config ];
   buildInputs = lib.optionals stdenv.isDarwin [ CoreServices Security ];
diff --git a/pkgs/development/tools/chit/default.nix b/pkgs/development/tools/chit/default.nix
index ac8f15a415888..dd37efb506d62 100644
--- a/pkgs/development/tools/chit/default.nix
+++ b/pkgs/development/tools/chit/default.nix
@@ -15,7 +15,7 @@ buildRustPackage rec {
     sha256 = "0iixczy3cad44j2d7zzj8f3lnmp4jwnb0snmwfgiq3vj9wrn28pz";
   };
 
-  cargoSha256 = "1w25k3bqmmcrhpkw510vbwph0rfmrzi2wby0z2rz1q4k1f9k486m";
+  cargoSha256 = "1y6k24p4m67v5773rzid2r0jwxp9piggrp0462z446hbcam2r4gd";
 
   nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
   buildInputs = []
diff --git a/pkgs/development/tools/clog-cli/default.nix b/pkgs/development/tools/clog-cli/default.nix
index c3b477e3ea369..395cd7979d615 100644
--- a/pkgs/development/tools/clog-cli/default.nix
+++ b/pkgs/development/tools/clog-cli/default.nix
@@ -13,7 +13,7 @@ buildRustPackage rec {
     sha256 = "1wxglc4n1dar5qphhj5pab7ps34cjr7jy611fwn72lz0f6c7jp3z";
   };
 
-  cargoSha256 = "1s7g9mcjyp0pjjxma1mb290fi7fk54qy2khh1zksxhr4d3mciv08";
+  cargoSha256 = "0xcgzlcmlk5ycw4kklprm8lzs72j2zp8xm3dcpy606z4r9qn0c6a";
 
   meta = {
     description = "Generate changelogs from local git metadata";
diff --git a/pkgs/development/tools/cmake-language-server/default.nix b/pkgs/development/tools/cmake-language-server/default.nix
index 2c85890e70bfc..0540e5785f6ed 100644
--- a/pkgs/development/tools/cmake-language-server/default.nix
+++ b/pkgs/development/tools/cmake-language-server/default.nix
@@ -16,11 +16,15 @@ buildPythonApplication rec {
     sha256 = "0vz7bjxkk0phjhz3h9kj6yr7wnk3g7lqmkqraa0kw12mzcfck837";
   };
 
-  # can be removed after v0.1.2
-  patches = lib.optional stdenv.isDarwin (fetchpatch {
-    url = "https://github.com/regen100/cmake-language-server/commit/0ec120f39127f25898ab110b43819e3e9becb8a3.patch";
-    sha256 = "1xbmarvsvzd61fnlap4qscnijli2rw2iqr7cyyvar2jd87z6sfp0";
-  });
+  patches = [
+    ./disable-test-timeouts.patch
+  ] ++ lib.optionals stdenv.isDarwin [
+    # can be removed after v0.1.2
+    (fetchpatch {
+      url = "https://github.com/regen100/cmake-language-server/commit/0ec120f39127f25898ab110b43819e3e9becb8a3.patch";
+      sha256 = "1xbmarvsvzd61fnlap4qscnijli2rw2iqr7cyyvar2jd87z6sfp0";
+    })
+  ];
 
   postPatch = ''
     substituteInPlace pyproject.toml \
@@ -38,6 +42,6 @@ buildPythonApplication rec {
     homepage = "https://github.com/regen100/cmake-language-server";
     description = "CMake LSP Implementation";
     license = licenses.mit;
-    maintainers = with maintainers; [ metadark ];
+    maintainers = with maintainers; [ kira-bruneau ];
   };
 }
diff --git a/pkgs/development/tools/cmake-language-server/disable-test-timeouts.patch b/pkgs/development/tools/cmake-language-server/disable-test-timeouts.patch
new file mode 100644
index 0000000000000..febe7cf77e71a
--- /dev/null
+++ b/pkgs/development/tools/cmake-language-server/disable-test-timeouts.patch
@@ -0,0 +1,13 @@
+diff --git a/tests/test_server.py b/tests/test_server.py
+index c0777f5..1184fb3 100644
+--- a/tests/test_server.py
++++ b/tests/test_server.py
+@@ -11,7 +11,7 @@ from pygls.types import (CompletionContext, CompletionParams,
+                          InitializeParams, Position, TextDocumentIdentifier,
+                          TextDocumentItem, TextDocumentPositionParams)
+ 
+-CALL_TIMEOUT = 2
++CALL_TIMEOUT = None
+ 
+ 
+ def _init(client: LanguageServer, root: Path):
diff --git a/pkgs/development/tools/continuous-integration/gitlab-runner/default.nix b/pkgs/development/tools/continuous-integration/gitlab-runner/default.nix
index 5e0b8845bd8b5..ce3264e1addea 100644
--- a/pkgs/development/tools/continuous-integration/gitlab-runner/default.nix
+++ b/pkgs/development/tools/continuous-integration/gitlab-runner/default.nix
@@ -30,7 +30,7 @@ buildGoPackage rec {
     owner = "gitlab-org";
     repo = "gitlab-runner";
     rev = "v${version}";
-    sha256 = "0jh5ghjyzr7srl3xjsklv9yskq8k88kmylpiigjir0mkbn43fgzq";
+    sha256 = "01ajl7zka5fnph5zcnp3z6ir8xr81wzkam69gxazwjb3nbs642an";
   };
 
   patches = [ ./fix-shell-path.patch ];
diff --git a/pkgs/development/tools/convco/default.nix b/pkgs/development/tools/convco/default.nix
index c152197358c91..44445f86752a7 100644
--- a/pkgs/development/tools/convco/default.nix
+++ b/pkgs/development/tools/convco/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-eWe7oTWl7QfIqq3GfMILi5S8zUi03ER1Mzfr8hqUvgw=";
   };
 
-  cargoSha256 = "sha256-hAUg2mh4VyyjkBRBs5YWi14yeGlMXxt+cdoz5xOS+1A=";
+  cargoSha256 = "sha256-RuClZ+ChP7d40e9nr1Lg8R0F7rbFbBse79V9Y1AQn3o=";
 
   nativeBuildInputs = [ openssl perl pkg-config ];
 
diff --git a/pkgs/development/tools/diesel-cli/default.nix b/pkgs/development/tools/diesel-cli/default.nix
index 8a976f44bf728..a2c1af2607d1e 100644
--- a/pkgs/development/tools/diesel-cli/default.nix
+++ b/pkgs/development/tools/diesel-cli/default.nix
@@ -46,7 +46,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoBuildFlags = [ "--no-default-features" "--features" "${lib.concatStringsSep "," features}" ];
   cargoPatches = [ ./cargo-lock.patch ];
-  cargoSha256 = "1vkwp861vm20agj0lkhnnxgg4vwg4d5clvvyzxrmm4y4yw46cdl2";
+  cargoSha256 = "060r90dvdi0s5v3kjagsrrdb4arzzbkin8v5563rdpv0sq1pi3bm";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/documentation/gi-docgen/default.nix b/pkgs/development/tools/documentation/gi-docgen/default.nix
index 06de11fde592a..2218b441476e9 100644
--- a/pkgs/development/tools/documentation/gi-docgen/default.nix
+++ b/pkgs/development/tools/documentation/gi-docgen/default.nix
@@ -1,6 +1,5 @@
 { lib
 , fetchFromGitLab
-, fetchpatch
 , meson
 , ninja
 , python3
@@ -8,68 +7,18 @@
 
 python3.pkgs.buildPythonApplication rec {
   pname = "gi-docgen";
-  version = "2021.2";
+  version = "2021.5";
 
   format = "other";
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
-    owner = "ebassi";
+    owner = "GNOME";
     repo = pname;
     rev = version;
-    sha256 = "17swx4s60anfyyb6dcsl8fq3s0j9cy54qcw0ciq4qj59d4039w5h";
+    sha256 = "1fz6r6mkp4fw1mn6gn9745wcdcqg7696bbwvdcnmhinlhrcnaiz6";
   };
 
-  patches = [
-    # Add pkg-config file so that Meson projects can find this.
-    # https://gitlab.gnome.org/ebassi/gi-docgen/merge_requests/26
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/jtojnar/gi-docgen/commit/d65ed2e4827c4129d26e3c1df9a48054b4e72c50.patch";
-      sha256 = "BEefcHiAd/HTW5zo39J2WtfQjGXUkNFB6MDJj8/Ge80=";
-    })
-
-    # Name generated devhelp files correctly.
-    # https://gitlab.gnome.org/ebassi/gi-docgen/merge_requests/27
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/ebassi/gi-docgen/commit/7c4de72f55cbce5670c3a6a1451548e97e5f07f7.patch";
-      sha256 = "ov/PvrZzKmCzw7nHJkbeLCnhtUVw1UbZQjFrWT3AtVg=";
-    })
-
-    # Fix broken link in Devhelp TOC.
-    # https://gitlab.gnome.org/ebassi/gi-docgen/merge_requests/28
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/ebassi/gi-docgen/commit/56f0e6f8b4bb9c92d635df60aa5d68f55b036711.patch";
-      sha256 = "5gFGiO9jPpkyZBL4qtWEotE5jY3sCGFGUGN/Fb6jZ+0=";
-    })
-
-    # Devhelp does not like subsections without links.
-    # https://gitlab.gnome.org/GNOME/devhelp/-/issues/28
-    (fetchpatch {
-      # Only visual but needed for the other two to apply.
-      # https://gitlab.gnome.org/ebassi/gi-docgen/merge_requests/28
-      url = "https://gitlab.gnome.org/ebassi/gi-docgen/commit/7f67fad5107b73489cb7bffca49177d9ad78e422.patch";
-      sha256 = "OKbC690nJsl1ckm/y9eeKDYX6AEClsNvIFy7DK+JYEc=";
-    })
-    # Add links to index.
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/ebassi/gi-docgen/commit/f891cc5fd481bc4180eec144d14f32c15c91833b.patch";
-      sha256 = "Fcnvdgxei+2ulGoWoCZ8WFrNy01tlNXMkHru3ArGHVQ=";
-    })
-    # Use different link for each symbol type name.
-    # https://gitlab.gnome.org/ebassi/gi-docgen/merge_requests/29
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/jtojnar/gi-docgen/commit/08dcc31f62be1a5af9bd9f8f702f321f4b5cffde.patch";
-      sha256 = "vAT8s7zQ9zCoZWK+6PsxcD5/48ZAfIOl4RSNljRCGWQ=";
-    })
-    # make DevHelp sections & index.json have stable ordering
-    # already merged upstream, so patch can removed when we update
-    # beyond 2021.2
-    (fetchpatch {
-      url = "https://gitlab.gnome.org/GNOME/gi-docgen/-/commit/cc21241d4386d4f78dbcb087fd9a92899935cb5c.patch";
-      sha256 = "0wna8mzrlbsv7f3bc7ndqll9l105kp8kdmhbbjhbdhzzzyvh6vcw";
-    })
-  ];
-
   nativeBuildInputs = [
     meson
     ninja
@@ -94,7 +43,7 @@ python3.pkgs.buildPythonApplication rec {
 
   meta = with lib; {
     description = "Documentation generator for GObject-based libraries";
-    homepage = "https://gitlab.gnome.org/ebassi/gi-docgen";
+    homepage = "https://gitlab.gnome.org/GNOME/gi-docgen";
     license = licenses.asl20; # OR GPL-3.0-or-later
     maintainers = teams.gnome.members;
   };
diff --git a/pkgs/development/tools/documentation/mdsh/default.nix b/pkgs/development/tools/documentation/mdsh/default.nix
index 68be931aa444f..e9bf373451332 100644
--- a/pkgs/development/tools/documentation/mdsh/default.nix
+++ b/pkgs/development/tools/documentation/mdsh/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1ki6w3qf8ipcf7ch5120mj16vs7yan8k9zjd25v8x6vbsd1iccgy";
   };
 
-  cargoSha256 = "10iqypz8hfyzy1xd78r39z2waa728d97kfnf1bbx8fr4a4pzan7y";
+  cargoSha256 = "0x5fd47rjmzzmwgj14gbj0rbxwbphd7f63mis4ivwlwc9ikjxdxb";
 
   meta = with lib; {
     description = "Markdown shell pre-processor";
diff --git a/pkgs/development/tools/dot-http/default.nix b/pkgs/development/tools/dot-http/default.nix
index b156847870d89..d5a507d4ebbae 100644
--- a/pkgs/development/tools/dot-http/default.nix
+++ b/pkgs/development/tools/dot-http/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1s2q4kdldhb5gd14g2h6vzrbjgbbbs9zp2dgmna0rhk1h4qv0mml";
   };
 
-  cargoSha256 = "0an3hskq1k2j4gdn8wvhfb9pqsc34ibs5bv7sjznkp5jma6fdr9w";
+  cargoSha256 = "013jyp2bgmssj1c18lm8jkb6q6jlhdrqzmyri6k5lgmfmb9dvkii";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/git-aggregator/default.nix b/pkgs/development/tools/git-aggregator/default.nix
new file mode 100644
index 0000000000000..a6599c667c866
--- /dev/null
+++ b/pkgs/development/tools/git-aggregator/default.nix
@@ -0,0 +1,40 @@
+{ git, lib, python3Packages }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "git-aggregator";
+  version = "1.8.1";
+
+  src = python3Packages.fetchPypi {
+    inherit pname version;
+    hash = "sha256-LLsyhyhPmOOvPzwEEJwkhrDfBMFueA7kuDlnrqwr08k=";
+  };
+
+  nativeBuildInputs = with python3Packages; [
+    setuptools-scm
+  ];
+  propagatedBuildInputs = with python3Packages; [
+    argcomplete
+    colorama
+    git
+    kaptan
+    requests
+  ];
+
+  checkInputs = [
+    git
+  ];
+
+  preCheck = ''
+    export HOME=`mktemp -d`
+    git config --global user.name John
+    git config --global user.email john@localhost
+  '';
+
+  meta = with lib; {
+    description = "Manage the aggregation of git branches from different remotes to build a consolidated one.";
+    homepage = "https://github.com/acsone/git-aggregator";
+    license = licenses.agpl3Plus;
+    maintainers = with maintainers; [ lourkeur ];
+    mainProgram = "gitaggregate";
+  };
+}
diff --git a/pkgs/development/tools/git-series/default.nix b/pkgs/development/tools/git-series/default.nix
index 0f7677c7aa26d..752cefad3c275 100644
--- a/pkgs/development/tools/git-series/default.nix
+++ b/pkgs/development/tools/git-series/default.nix
@@ -15,7 +15,7 @@ buildRustPackage rec {
     sha256 = "07mgq5h6r1gf3jflbv2khcz32bdazw7z1s8xcsafdarnm13ps014";
   };
 
-  cargoSha256 = "0ijgx8fksg2najb336dhddxlqfzc338f9ylydkpw6b39k72mm00d";
+  cargoSha256 = "0870f4rd98fbmyl8524ivfg3xf4qpzb1x68q1idnl47mmf68pyx8";
 
   cargoPatches = [
     (fetchpatch {
diff --git a/pkgs/development/tools/kustomize/default.nix b/pkgs/development/tools/kustomize/default.nix
index aa6382bb16da5..489b62891b65f 100644
--- a/pkgs/development/tools/kustomize/default.nix
+++ b/pkgs/development/tools/kustomize/default.nix
@@ -2,7 +2,7 @@
 
 buildGoModule rec {
   pname = "kustomize";
-  version = "4.1.2";
+  version = "4.1.3";
   # rev is the commit of the tag, mainly for kustomize version command output
   rev = "9e8e7a7fe99ec9fbf801463e8607928322fc5245";
 
@@ -17,7 +17,7 @@ buildGoModule rec {
     owner = "kubernetes-sigs";
     repo = pname;
     rev = "kustomize/v${version}";
-    sha256 = "sha256-uomtW6PPs/UHvKRbHToot6kU4YJGLJuet8vJENbwEgI=";
+    sha256 = "sha256-NPWKInDHOoelWqDrUn/AlRItI4e8J6dbBxgLW078ecs=";
   };
 
   # TODO: Remove once https://github.com/kubernetes-sigs/kustomize/pull/3708 got merged.
@@ -26,7 +26,7 @@ buildGoModule rec {
   # avoid finding test and development commands
   sourceRoot = "source/kustomize";
 
-  vendorSha256 = "sha256-fcsjxtCojahI6ZIcaSG5ubNqlWEC6DnNHtVYwTtbSw4=";
+  vendorSha256 = "sha256-6maEpEPEV436NrVnVlvWV1q6YywGVILXbxn8Z8Ku/hs=";
 
   meta = with lib; {
     description = "Customization of kubernetes YAML configurations";
diff --git a/pkgs/development/tools/misc/autoconf/default.nix b/pkgs/development/tools/misc/autoconf/default.nix
index ae8fc2d90619b..3b70e819c8998 100644
--- a/pkgs/development/tools/misc/autoconf/default.nix
+++ b/pkgs/development/tools/misc/autoconf/default.nix
@@ -6,11 +6,11 @@
 # files.
 
 stdenv.mkDerivation rec {
-  name = "autoconf-2.70";
+  name = "autoconf-2.71";
 
   src = fetchurl {
     url = "mirror://gnu/autoconf/${name}.tar.xz";
-    sha256 = "1ipckz0wr2mvhj9n3ys54fmf2aksin6bhqvzl304bn6rc1w257ps";
+    sha256 = "197sl23irn6s9pd54rxj5vcp5y8dv65jb9yfqgr2g56cxg7q6k7i";
   };
 
   nativeBuildInputs = [ m4 perl ];
diff --git a/pkgs/development/tools/misc/autogen/default.nix b/pkgs/development/tools/misc/autogen/default.nix
index c6eb6916d1ec8..75c6471eb4c6e 100644
--- a/pkgs/development/tools/misc/autogen/default.nix
+++ b/pkgs/development/tools/misc/autogen/default.nix
@@ -62,7 +62,9 @@ stdenv.mkDerivation rec {
       # the configure check for regcomp wants to run a host program
       "libopts_cv_with_libregex=yes"
       #"MAKEINFO=${buildPackages.texinfo}/bin/makeinfo"
-    ]);
+    ])
+    # See: https://sourceforge.net/p/autogen/bugs/187/
+    ++ lib.optionals stdenv.isDarwin [ "ac_cv_func_utimensat=no" ];
 
   #doCheck = true; # not reliable
 
diff --git a/pkgs/development/tools/misc/ccache/default.nix b/pkgs/development/tools/misc/ccache/default.nix
index b905f5e8ed5ed..94fca742b6d35 100644
--- a/pkgs/development/tools/misc/ccache/default.nix
+++ b/pkgs/development/tools/misc/ccache/default.nix
@@ -102,7 +102,7 @@ let ccache = stdenv.mkDerivation rec {
     homepage = "https://ccache.dev";
     downloadPage = "https://ccache.dev/download.html";
     license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ metadark r-burns ];
+    maintainers = with maintainers; [ kira-bruneau r-burns ];
     platforms = platforms.unix;
   };
 };
diff --git a/pkgs/development/tools/misc/ctags/default.nix b/pkgs/development/tools/misc/ctags/default.nix
index 90825db2a549c..fde7307b27dc9 100644
--- a/pkgs/development/tools/misc/ctags/default.nix
+++ b/pkgs/development/tools/misc/ctags/default.nix
@@ -15,6 +15,13 @@ stdenv.mkDerivation rec {
   # don't use $T(E)MP which is set to the build directory
   configureFlags= [ "--enable-tmpdir=/tmp" ];
 
+  patches = [
+    # Library defines an `__unused__` which is a reserved name, and may
+    # conflict with the standard library definition. One such conflict is with
+    # macOS headers.
+    ./unused-collision.patch
+  ];
+
   meta = with lib; {
     description = "A tool for fast source code browsing (exuberant ctags)";
     longDescription = ''
diff --git a/pkgs/development/tools/misc/ctags/unused-collision.patch b/pkgs/development/tools/misc/ctags/unused-collision.patch
new file mode 100644
index 0000000000000..595f67a01b5aa
--- /dev/null
+++ b/pkgs/development/tools/misc/ctags/unused-collision.patch
@@ -0,0 +1,246 @@
+--- a/c.c	(revision 816)
++++ b/c.c	(working copy)
+@@ -619,7 +619,7 @@
+ 	return name;
+ }
+ 
+-static void __unused__ pt (tokenInfo *const token)
++static void UNUSED pt (tokenInfo *const token)
+ {
+ 	if (isType (token, TOKEN_NAME))
+ 		printf ("type: %-12s: %-13s   line: %lu\n",
+@@ -634,7 +634,7 @@
+ 			tokenString (token->type), token->lineNumber);
+ }
+ 
+-static void __unused__ ps (statementInfo *const st)
++static void UNUSED ps (statementInfo *const st)
+ {
+ 	unsigned int i;
+ 	printf ("scope: %s   decl: %s   gotName: %s   gotParenName: %s\n",
+--- a/eiffel.c	(revision 816)
++++ b/eiffel.c	(working copy)
+@@ -807,7 +807,7 @@
+ 
+ static boolean parseType (tokenInfo *const token);
+ 
+-static void parseGeneric (tokenInfo *const token, boolean declaration __unused__)
++static void parseGeneric (tokenInfo *const token, boolean declaration UNUSED)
+ {
+ 	unsigned int depth = 0;
+ #ifdef TYPE_REFERENCE_TOOL
+--- a/general.h	(revision 816)
++++ b/general.h	(working copy)
+@@ -57,10 +57,10 @@
+  *  to prevent warnings about unused variables.
+  */
+ #if (__GNUC__ > 2  ||  (__GNUC__ == 2  &&  __GNUC_MINOR__ >= 7)) && !defined (__GNUG__)
+-# define __unused__  __attribute__((unused))
++# define UNUSED  __attribute__((unused))
+ # define __printf__(s,f)  __attribute__((format (printf, s, f)))
+ #else
+-# define __unused__
++# define UNUSED
+ # define __printf__(s,f)
+ #endif
+ 
+--- a/lregex.c	(revision 816)
++++ b/lregex.c	(working copy)
+@@ -538,11 +538,11 @@
+ #endif  /* HAVE_REGEX */
+ 
+ extern void addTagRegex (
+-		const langType language __unused__,
+-		const char* const regex __unused__,
+-		const char* const name __unused__,
+-		const char* const kinds __unused__,
+-		const char* const flags __unused__)
++		const langType language UNUSED,
++		const char* const regex UNUSED,
++		const char* const name UNUSED,
++		const char* const kinds UNUSED,
++		const char* const flags UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	Assert (regex != NULL);
+@@ -564,10 +564,10 @@
+ }
+ 
+ extern void addCallbackRegex (
+-		const langType language __unused__,
+-		const char* const regex __unused__,
+-		const char* const flags __unused__,
+-		const regexCallback callback __unused__)
++		const langType language UNUSED,
++		const char* const regex UNUSED,
++		const char* const flags UNUSED,
++		const regexCallback callback UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	Assert (regex != NULL);
+@@ -581,7 +581,7 @@
+ }
+ 
+ extern void addLanguageRegex (
+-		const langType language __unused__, const char* const regex __unused__)
++		const langType language UNUSED, const char* const regex UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	if (! regexBroken)
+@@ -602,7 +602,7 @@
+ */
+ 
+ extern boolean processRegexOption (const char *const option,
+-								   const char *const parameter __unused__)
++								   const char *const parameter UNUSED)
+ {
+ 	boolean handled = FALSE;
+ 	const char* const dash = strchr (option, '-');
+@@ -624,7 +624,7 @@
+ 	return handled;
+ }
+ 
+-extern void disableRegexKinds (const langType language __unused__)
++extern void disableRegexKinds (const langType language UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	if (language <= SetUpper  &&  Sets [language].count > 0)
+@@ -639,8 +639,8 @@
+ }
+ 
+ extern boolean enableRegexKind (
+-		const langType language __unused__,
+-		const int kind __unused__, const boolean mode __unused__)
++		const langType language UNUSED,
++		const int kind UNUSED, const boolean mode UNUSED)
+ {
+ 	boolean result = FALSE;
+ #ifdef HAVE_REGEX
+@@ -660,7 +660,7 @@
+ 	return result;
+ }
+ 
+-extern void printRegexKinds (const langType language __unused__, boolean indent __unused__)
++extern void printRegexKinds (const langType language UNUSED, boolean indent UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	if (language <= SetUpper  &&  Sets [language].count > 0)
+--- a/lua.c	(revision 816)
++++ b/lua.c	(working copy)
+@@ -37,7 +37,7 @@
+ */
+ 
+ /* for debugging purposes */
+-static void __unused__ print_string (char *p, char *q)
++static void UNUSED print_string (char *p, char *q)
+ {
+ 	for ( ; p != q; p++)
+ 		fprintf (errout, "%c", *p);
+--- a/main.c	(revision 816)
++++ b/main.c	(working copy)
+@@ -522,7 +522,7 @@
+  *		Start up code
+  */
+ 
+-extern int main (int __unused__ argc, char **argv)
++extern int main (int UNUSED argc, char **argv)
+ {
+ 	cookedArgs *args;
+ #ifdef VMS
+--- a/options.c	(revision 816)
++++ b/options.c	(working copy)
+@@ -730,7 +730,7 @@
+ }
+ 
+ static void processExcludeOption (
+-		const char *const option __unused__, const char *const parameter)
++		const char *const option UNUSED, const char *const parameter)
+ {
+ 	const char *const fileName = parameter + 1;
+ 	if (parameter [0] == '\0')
+@@ -867,7 +867,7 @@
+ }
+ 
+ static void processFilterTerminatorOption (
+-		const char *const option __unused__, const char *const parameter)
++		const char *const option UNUSED, const char *const parameter)
+ {
+ 	freeString (&Option.filterTerminator);
+ 	Option.filterTerminator = stringCopy (parameter);
+@@ -930,8 +930,8 @@
+ }
+ 
+ static void processHelpOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option UNUSED,
++		const char *const parameter UNUSED)
+ {
+ 	printProgramIdentification ();
+ 	putchar ('\n');
+@@ -1139,8 +1139,8 @@
+ }
+ 
+ static void processLicenseOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option UNUSED,
++		const char *const parameter UNUSED)
+ {
+ 	printProgramIdentification ();
+ 	puts ("");
+@@ -1166,8 +1166,8 @@
+ }
+ 
+ static void processListMapsOption (
+-		const char *const __unused__ option,
+-		const char *const __unused__ parameter)
++		const char *const UNUSED option,
++		const char *const UNUSED parameter)
+ {
+ 	if (parameter [0] == '\0' || strcasecmp (parameter, "all") == 0)
+ 	    printLanguageMaps (LANG_AUTO);
+@@ -1183,8 +1183,8 @@
+ }
+ 
+ static void processListLanguagesOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option UNUSED,
++		const char *const parameter UNUSED)
+ {
+ 	printLanguageList ();
+ 	exit (0);
+@@ -1358,8 +1358,8 @@
+ }
+ 
+ static void processVersionOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option UNUSED,
++		const char *const parameter UNUSED)
+ {
+ 	printProgramIdentification ();
+ 	exit (0);
+--- a/parse.c	(revision 816)
++++ b/parse.c	(working copy)
+@@ -376,7 +376,7 @@
+ */
+ 
+ extern void processLanguageDefineOption (
+-		const char *const option, const char *const parameter __unused__)
++		const char *const option, const char *const parameter UNUSED)
+ {
+ #ifdef HAVE_REGEX
+ 	if (parameter [0] == '\0')
+--- a/routines.c	(revision 816)
++++ b/routines.c	(working copy)
+@@ -526,7 +526,7 @@
+ 
+ #if ! defined (HAVE_STAT_ST_INO)
+ 
+-static void canonicalizePath (char *const path __unused__)
++static void canonicalizePath (char *const path UNUSED)
+ {
+ #if defined (MSDOS_STYLE_PATH)
+ 	char *p;
diff --git a/pkgs/development/tools/misc/gdb/default.nix b/pkgs/development/tools/misc/gdb/default.nix
index 66d4e8bc05726..ffe1fa3662f88 100644
--- a/pkgs/development/tools/misc/gdb/default.nix
+++ b/pkgs/development/tools/misc/gdb/default.nix
@@ -26,11 +26,11 @@ assert pythonSupport -> python3 != null;
 
 stdenv.mkDerivation rec {
   pname = targetPrefix + basename;
-  version = "10.1";
+  version = "10.2";
 
   src = fetchurl {
     url = "mirror://gnu/gdb/${basename}-${version}.tar.xz";
-    sha256 = "1h32dckz1y8fnyxh22iyw8h3hnhxr79v1ng85px3ljn1xv71wbzq";
+    sha256 = "0aag1c0fw875pvhjg1qp7x8pf6gf92bjv5gcic5716scacyj58da";
   };
 
   postPatch = if stdenv.isDarwin then ''
diff --git a/pkgs/development/tools/misc/hydra-cli/default.nix b/pkgs/development/tools/misc/hydra-cli/default.nix
index 9160a33668119..1332885bbdbea 100644
--- a/pkgs/development/tools/misc/hydra-cli/default.nix
+++ b/pkgs/development/tools/misc/hydra-cli/default.nix
@@ -10,7 +10,7 @@ rustPlatform.buildRustPackage rec {
     rev = "v${version}";
     sha256 = "1fd3swdjx249971ak1bgndm5kh6rlzbfywmydn122lhfi6ry6a03";
   };
-  cargoSha256 = "1fjzcgayyha270bdxl5p6c337nq8zj4h81rk4ih9czyz3yaxga3f";
+  cargoSha256 = "16446ppkvc6l8087x5m5kyy5gk4f7inyj7rzrfysriw4fvqxjsf3";
 
   buildInputs = [ openssl ]
                 ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
diff --git a/pkgs/development/tools/misc/itm-tools/default.nix b/pkgs/development/tools/misc/itm-tools/default.nix
index 32c32b536d9d0..0abdd01790132 100644
--- a/pkgs/development/tools/misc/itm-tools/default.nix
+++ b/pkgs/development/tools/misc/itm-tools/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoPatches = [ ./cargo-lock.patch ];
 
-  cargoSha256 = "0rl2ph5igwjl7rwpwcf6afnxly5av7cd6va6wn82lxm606giyq75";
+  cargoSha256 = "1hqv530x8k4rf9zzyl5p5z58bymk1p4qwrcxs21gr0zm2hqjlxy4";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/misc/libtool/libtool2-macos11.patch b/pkgs/development/tools/misc/libtool/libtool2-macos11.patch
new file mode 100644
index 0000000000000..1552ae7a949f3
--- /dev/null
+++ b/pkgs/development/tools/misc/libtool/libtool2-macos11.patch
@@ -0,0 +1,32 @@
+Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
+---
+ m4/libtool.m4 | 13 ++++---------
+ 1 file changed, 4 insertions(+), 9 deletions(-)
+
+diff --git a/m4/libtool.m4 b/m4/libtool.m4
+index f2d1f398..b971e8e7 100644
+--- a/m4/libtool.m4
++++ b/m4/libtool.m4
+@@ -1067,16 +1067,11 @@ _LT_EOF
+       _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
+     darwin1.*)
+       _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+-    darwin*) # darwin 5.x on
+-      # if running on 10.5 or later, the deployment target defaults
+-      # to the OS version, if on x86, and 10.4, the deployment
+-      # target defaults to 10.4. Don't you love it?
+-      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+-	10.0,*86*-darwin8*|10.0,*-darwin[[91]]*)
+-	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+-	10.[[012]][[,.]]*)
++    darwin*)
++      case ${MACOSX_DEPLOYMENT_TARGET},$host in
++	10.[[012]],*|,*powerpc*)
+ 	  _lt_dar_allow_undefined='$wl-flat_namespace $wl-undefined ${wl}suppress' ;;
+-	10.*)
++	*)
+ 	  _lt_dar_allow_undefined='$wl-undefined ${wl}dynamic_lookup' ;;
+       esac
+     ;;
+-- 
+2.24.3 (Apple Git-128)
diff --git a/pkgs/development/tools/misc/libtool/libtool2.nix b/pkgs/development/tools/misc/libtool/libtool2.nix
index 6d7c4a9087f45..44e4c8665c839 100644
--- a/pkgs/development/tools/misc/libtool/libtool2.nix
+++ b/pkgs/development/tools/misc/libtool/libtool2.nix
@@ -1,6 +1,11 @@
-{ lib, stdenv, fetchurl, m4, perl, help2man
+{ lib, stdenv, fetchurl, fetchpatch, autoconf, automake, m4, perl, help2man
 }:
 
+# Note: this package is used for bootstrapping fetchurl, and thus
+# cannot use fetchpatch! All mutable patches (generated by GitHub or
+# cgit) that are needed here should be included directly in Nixpkgs as
+# files.
+
 stdenv.mkDerivation rec {
   pname = "libtool";
   version = "2.4.6";
@@ -12,7 +17,26 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" ];
 
-  nativeBuildInputs = [ perl help2man m4 ];
+  patches = [
+    # Suport macOS version 11.0
+    # https://lists.gnu.org/archive/html/libtool-patches/2020-06/msg00001.html
+    ./libtool2-macos11.patch
+  ];
+
+  # Normally we'd use autoreconfHook, but that includes libtoolize.
+  postPatch = ''
+    aclocal -I m4
+    automake
+    autoconf
+
+    pushd libltdl
+    aclocal -I ../m4
+    automake
+    autoconf
+    popd
+  '';
+
+  nativeBuildInputs = [ perl help2man m4 ] ++ [ autoconf automake ];
   propagatedBuildInputs = [ m4 ];
 
   # Don't fixup "#! /bin/sh" in Libtool, otherwise it will use the
diff --git a/pkgs/development/tools/misc/mdctags/default.nix b/pkgs/development/tools/misc/mdctags/default.nix
index ac61702160125..7d8992b4e201c 100644
--- a/pkgs/development/tools/misc/mdctags/default.nix
+++ b/pkgs/development/tools/misc/mdctags/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage {
     sha256 = "14gryhgh9czlkfk75ml0620c6v8r74i6h3ykkkmc7gx2z8h1jxrb";
   };
 
-  cargoSha256 = "01ap2w755vbr01nfqc5185mr2w9y32g0d4ahc3lw2x3m8qv0bh6x";
+  cargoSha256 = "1kdbrcpvxiq91m5vq33vzjhsp4j3flzrpbj5hmxf0k3al1a7qk1g";
 
   meta = {
     description = "tags for markdown file";
diff --git a/pkgs/development/tools/misc/ptags/default.nix b/pkgs/development/tools/misc/ptags/default.nix
index 8406ecf298f80..c17bfd67358a5 100644
--- a/pkgs/development/tools/misc/ptags/default.nix
+++ b/pkgs/development/tools/misc/ptags/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1xr1szh4dfrcmi6s6dj791k1ix2zbv75rqkqbyb1lmh5548kywkg";
   };
 
-  cargoSha256 = "1rsnb4kzfb577xw7jk0939n42sv94vvspvbz783bmpy9vl53i38k";
+  cargoSha256 = "1pz5hvn1iq26i8c2cmqavhnri8h0sn40khrxvcdkj9q47nsj5wcx";
 
   # Sanity check.
   checkPhase = ''
diff --git a/pkgs/development/tools/misc/rtss/default.nix b/pkgs/development/tools/misc/rtss/default.nix
index 505e6d23ef703..36ef4c349e9e1 100644
--- a/pkgs/development/tools/misc/rtss/default.nix
+++ b/pkgs/development/tools/misc/rtss/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1936w161mkbcwicrxn51b42pgir5yjiw85s74lbfq70nddw18nyn";
   };
 
-  cargoSha256 = "0nll5gg7fjh6sz3cscarknb0gaivmzkcxhwdb2li47r74rcbrj36";
+  cargoSha256 = "1b1xiaaxbw6y80pkzd594dikm372l1mmymf1wn2acmlz979nmas8";
 
   meta = with lib; {
     description = "Annotate output with relative durations between lines";
diff --git a/pkgs/development/tools/misc/sccache/default.nix b/pkgs/development/tools/misc/sccache/default.nix
index 4379efd5071bc..cbdee69ce2ce5 100644
--- a/pkgs/development/tools/misc/sccache/default.nix
+++ b/pkgs/development/tools/misc/sccache/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1kygk7ilv7la36kv4jdn1ird7f3896wgr88kyqf0iagfqkzb2vsb";
   };
 
-  cargoSha256 = "1cfdwf00jgwsv0f72427asid1xr57s56jk5xj489dgppvgy7wdbj";
+  cargoSha256 = "1f42cqaqnjwi9k4ihqil6z2dqh5dnf76x54gk7mndzkrfg3rl573";
 
   cargoBuildFlags = lib.optionals (!stdenv.isDarwin) [ "--features=dist-client,dist-server" ];
 
diff --git a/pkgs/development/tools/misc/svls/default.nix b/pkgs/development/tools/misc/svls/default.nix
index 6af24ed5d10bf..13b5291479958 100644
--- a/pkgs/development/tools/misc/svls/default.nix
+++ b/pkgs/development/tools/misc/svls/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-+/4D0pRZs1Gy6DJnsDZA8wWi1FKhr7gRS0oq1TyWpuE=";
   };
 
-  cargoSha256 = "sha256-o6/L/4QcIei4X1pHYjV72hcEmTMp+pvJkwbb+niqWP8=";
+  cargoSha256 = "sha256-xkRlUXlkXQwvzIuhExf+tSSBi+8BZv58btvln05UI+k=";
 
   meta = with lib; {
     description = "SystemVerilog language server";
diff --git a/pkgs/development/tools/misc/texlab/default.nix b/pkgs/development/tools/misc/texlab/default.nix
index eec1576711dfc..96fa70017a882 100644
--- a/pkgs/development/tools/misc/texlab/default.nix
+++ b/pkgs/development/tools/misc/texlab/default.nix
@@ -10,16 +10,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "texlab";
-  version = "3.0.0";
+  version = "3.0.1";
 
   src = fetchFromGitHub {
     owner = "latex-lsp";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-jOxneMqeyvMQWKPNha59H6qWSFmx+Z71SU2+M5VWMsA=";
+    hash = "sha256-hiz3dMEYNKKd9dZiGghAhGqoXXKJiZG6sECfsCYVscU=";
   };
 
-  cargoHash = "sha256-H6czxSTw93RNTaN0OJyv0RfwmGAiFkpDgUtXHCD+jrY=";
+  cargoHash = "sha256-sCvQFU9/ENVi1RHV3QDngzI/S1xuHvpWxsrxT73jdI0=";
 
   outputs = [ "out" "man" ];
 
@@ -42,6 +42,7 @@ rustPlatform.buildRustPackage rec {
     description = "An implementation of the Language Server Protocol for LaTeX";
     homepage = "https://texlab.netlify.app";
     license = licenses.mit;
-    maintainers = with maintainers; [ doronbehar metadark ];
+    maintainers = with maintainers; [ doronbehar kira-bruneau ];
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/development/tools/misc/tokei/default.nix b/pkgs/development/tools/misc/tokei/default.nix
index 557ff4fa967c8..e87f070675616 100644
--- a/pkgs/development/tools/misc/tokei/default.nix
+++ b/pkgs/development/tools/misc/tokei/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-jqDsxUAMD/MCCI0hamkGuCYa8rEXNZIR8S+84S8FbgI=";
   };
 
-  cargoSha256 = "sha256-iUDc54E8AiLMJw9h99kg/3VmaSi8GqfQyrPwa9nJ994=";
+  cargoSha256 = "sha256-U7Bode8qwDsNf4FVppfEHA9uiOFz74CtKgXG6xyYlT8=";
 
   buildInputs = lib.optionals stdenv.isDarwin [
     libiconv Security
diff --git a/pkgs/development/tools/misc/unused/default.nix b/pkgs/development/tools/misc/unused/default.nix
index 1a5f3efe0e6ad..58e4ba0bc98ec 100644
--- a/pkgs/development/tools/misc/unused/default.nix
+++ b/pkgs/development/tools/misc/unused/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake ];
 
-  cargoSha256 = "1c0gj2wp0nydv0binxj3ikm5sm6y5z3pklp5b06dgvq02licz57a";
+  cargoSha256 = "0y7vsba4r4v2lwf02i2dxwicnhknajbbzsdlnn5srvg6nvl3kspi";
 
   meta = with lib; {
     description = "A tool to identify potentially unused code";
diff --git a/pkgs/development/tools/misc/wishbone-tool/default.nix b/pkgs/development/tools/misc/wishbone-tool/default.nix
index d900d14e33c28..0465fb74aa1ac 100644
--- a/pkgs/development/tools/misc/wishbone-tool/default.nix
+++ b/pkgs/development/tools/misc/wishbone-tool/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage {
   cargoDepsHook = ''
     ln -s wishbone-tool source
   '';
-  cargoSha256 = "0d5kcwy0cgxqfxf2xysw65ng84q4knhp4fgvh6dwqhf0nsca9gvs";
+  cargoSha256 = "1b12wpmzv7wxidc4hd8hmp8iwqhqlycxh8bdv3rf701sqsazkc5x";
 
   buildInputs = [ libusb-compat-0_1 ];
 
diff --git a/pkgs/development/tools/pactorio/default.nix b/pkgs/development/tools/pactorio/default.nix
index 8defc8c06caa5..3790440f1b8b0 100644
--- a/pkgs/development/tools/pactorio/default.nix
+++ b/pkgs/development/tools/pactorio/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "07h9hywz0pc29411myhxjq6pks4p6q6czbqjv7fxf3xkb1mg9grq";
   };
 
-  cargoSha256 = "1m7bvi6i52xqvssjx5fr2dz25ny7hkmb8w8p23pczpdmpd2y0r7r";
+  cargoSha256 = "1rac2s36j88vm231aji8d0ndfbaa2gzxwsrxrvsi0zp9cqisc6rh";
 
   nativeBuildInputs = [ installShellFiles ];
   buildInputs = lib.optional stdenv.isDarwin Security;
diff --git a/pkgs/development/tools/parinfer-rust/default.nix b/pkgs/development/tools/parinfer-rust/default.nix
index 2cd8ff4fdb636..59253a4f7da24 100644
--- a/pkgs/development/tools/parinfer-rust/default.nix
+++ b/pkgs/development/tools/parinfer-rust/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0hj5in5h7pj72m4ag80ing513fh65q8xlsf341qzm3vmxm3y3jgd";
   };
 
-  cargoSha256 = "16ylk125p368mcz8nandmfqlygrqjlf8mqaxlbpixqga378saidl";
+  cargoSha256 = "1lam4gwzcj6w0pyxf61l2cpbvvf5gmj2gwi8dangnhd60qhlnvrx";
 
   nativeBuildInputs = [ llvmPackages.clang ];
   buildInputs = [ llvmPackages.libclang ];
diff --git a/pkgs/development/tools/parsing/flex/default.nix b/pkgs/development/tools/parsing/flex/default.nix
index 42b007300a951..0bc26db575045 100644
--- a/pkgs/development/tools/parsing/flex/default.nix
+++ b/pkgs/development/tools/parsing/flex/default.nix
@@ -34,8 +34,8 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ m4 ];
 
   preConfigure = lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "ac_cv_func_malloc_0_nonnull=yes"
-    "ac_cv_func_realloc_0_nonnull=yes"
+    "export ac_cv_func_malloc_0_nonnull=yes"
+    "export ac_cv_func_realloc_0_nonnull=yes"
   ];
 
   postConfigure = lib.optionalString (stdenv.isDarwin || stdenv.isCygwin) ''
diff --git a/pkgs/development/tools/parsing/tree-sitter/default.nix b/pkgs/development/tools/parsing/tree-sitter/default.nix
index 293b8bb095a74..29edf0f9f27cb 100644
--- a/pkgs/development/tools/parsing/tree-sitter/default.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/default.nix
@@ -30,7 +30,7 @@ let
   # 3) run the ./result script that is output by that (it updates ./grammars)
   version = "0.19.3";
   sha256 = "0zd1p9x32bwdc5cdqr0x8i9fpcykk1zczb8zdjawrrr92465d26y";
-  cargoSha256 = "0mlrbl85x1x2ynwrps94mxn95rjj1r7gb3vdivfaxqv1xvp25m41";
+  cargoSha256 = "1n63lxp8rknb5xqp02csj649cxs7d891a520djl3lb4k1finhsjj";
 
   src = fetchFromGitHub {
     owner = "tree-sitter";
diff --git a/pkgs/development/tools/pax-rs/default.nix b/pkgs/development/tools/pax-rs/default.nix
index ff4219ad09c6b..248a137c49f6a 100644
--- a/pkgs/development/tools/pax-rs/default.nix
+++ b/pkgs/development/tools/pax-rs/default.nix
@@ -36,5 +36,5 @@ buildRustPackage rec {
       cp ${cargo-lock} $out/Cargo.lock
     '';
 
-  cargoSha256 = "0wx5x7ll21bb6v34csk63kkvxdk3as720hdkaj0izdkpy0xf1knr";
+  cargoSha256 = "0d6g52hjflnw2zvlx10pz78527vh7mw5n43yi8q6dwr3pkbds1fs";
 }
diff --git a/pkgs/development/tools/pqrs/default.nix b/pkgs/development/tools/pqrs/default.nix
index fb91709bde035..24efea2036a63 100644
--- a/pkgs/development/tools/pqrs/default.nix
+++ b/pkgs/development/tools/pqrs/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1vx952ki1rhwfmr3faxs363m9fh61b37b0bkbs57ggn9r44sk1z2";
   };
 
-  cargoSha256 = "1c482y83gzpvazdsxsx5n509mkqmyz640s18y4yg928mmqbsz9c4";
+  cargoSha256 = "0mjwazsnryhlfyzcik8052q0imz5f104x86k6b5rncbbbjaj17q1";
 
   meta = with lib; {
     description = "CLI tool to inspect Parquet files";
diff --git a/pkgs/development/tools/py-spy/default.nix b/pkgs/development/tools/py-spy/default.nix
index 89480f53a375e..94c706c021062 100644
--- a/pkgs/development/tools/py-spy/default.nix
+++ b/pkgs/development/tools/py-spy/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   checkInputs = [ python3 ];
 
-  cargoSha256 = "sha256-GFH8RzyAMtdfoHPcCV3pKf24fKU65vhMLQfLtkhD0Ns=";
+  cargoSha256 = "sha256-hmqrVGNu3zb109TQfhLI3wvGVnlc4CfbkrIKMfRSn7M=";
 
   meta = with lib; {
     description = "Sampling profiler for Python programs";
diff --git a/pkgs/development/tools/rebazel/default.nix b/pkgs/development/tools/rebazel/default.nix
index 73a58ee100bf4..5dee0a1b9e866 100644
--- a/pkgs/development/tools/rebazel/default.nix
+++ b/pkgs/development/tools/rebazel/default.nix
@@ -10,7 +10,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-v84ZXhtJpejQmP61NmP06+qrtMu/0yb7UyD7U12xlME=";
   };
 
-  cargoSha256 = "sha256-2FmtbvtNfNoocj3Ly553KBLfOgBAa/eAxOrfZ3NGzzw=";
+  cargoSha256 = "sha256-cBAm8LyNKEVJkhZJ+QZU5XtQutb1oNvad8xH70Bi2LM=";
 
   meta = with lib; {
     description = "tool for expediting bazel build workflows";
diff --git a/pkgs/development/tools/rnix-lsp/default.nix b/pkgs/development/tools/rnix-lsp/default.nix
index e938526ecbfb3..98670e9e1845e 100644
--- a/pkgs/development/tools/rnix-lsp/default.nix
+++ b/pkgs/development/tools/rnix-lsp/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0fy620c34kxl27sd62x9mj0555bcdmnmbsxavmyiwb497z1m9wnn";
   };
 
-  cargoSha256 = "0xmaa7rds7hlagfxj65pv9vgflcv4nwbwbw4g7cyj88cbb1kbxxj";
+  cargoSha256 = "1akapxrh38g44531r25dgik8y5qyy9y6zb031hg8v61px2ajs39s";
 
   meta = with lib; {
     description = "A work-in-progress language server for Nix, with syntax checking and basic completion";
diff --git a/pkgs/development/tools/rq/default.nix b/pkgs/development/tools/rq/default.nix
index c9e78650f607f..7d222e03bc977 100644
--- a/pkgs/development/tools/rq/default.nix
+++ b/pkgs/development/tools/rq/default.nix
@@ -11,6 +11,11 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0km9d751jr6c5qy4af6ks7nv3xfn13iqi03wq59a1c73rnf0zinp";
   };
 
+  cargoSha256 = "0071q08f75qrxdkbx1b9phqpbj15r79jbh391y32acifi7hr35hj";
+
+  buildInputs = [ llvmPackages.libclang v8 ]
+  ++ lib.optionals stdenv.isDarwin [ libiconv ];
+
   postPatch = ''
     # Remove #[deny(warnings)] which is equivalent to -Werror in C.
     # Prevents build failures when upgrading rustc, which may give more warnings.
@@ -18,11 +23,6 @@ rustPlatform.buildRustPackage rec {
       --replace "#![deny(warnings)]" ""
   '';
 
-  cargoSha256 = "0c5vwy3c5ji602dj64z6jqvcpi2xff03zvjbnwihb3ydqwnb3v67";
-
-  buildInputs = [ llvmPackages.libclang v8 ]
-  ++ lib.optionals stdenv.isDarwin [ libiconv ];
-
   configurePhase = ''
     export LIBCLANG_PATH="${llvmPackages.libclang.lib}/lib"
     export V8_SOURCE="${v8}"
diff --git a/pkgs/development/tools/rust/cargo-asm/default.nix b/pkgs/development/tools/rust/cargo-asm/default.nix
index f453955a5c717..cd657967e9a0c 100644
--- a/pkgs/development/tools/rust/cargo-asm/default.nix
+++ b/pkgs/development/tools/rust/cargo-asm/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1f6kzsmxgdms9lq5z9ynnmxymk9k2lzlp3caa52wqjvdw1grw0rb";
   };
 
-  cargoSha256 = "0d797cisiydblh64vqpfdjf37wmxrvs77phdrqh582lbrvnfhx2j";
+  cargoSha256 = "1c22aal3i7zbyxr2c41fimfx13fwp9anmhh641951yd7cqb8xij2";
 
   buildInputs = lib.optional stdenv.isDarwin Security;
 
diff --git a/pkgs/development/tools/rust/cargo-binutils/default.nix b/pkgs/development/tools/rust/cargo-binutils/default.nix
index 05629d613d7e3..f499512ce5322 100644
--- a/pkgs/development/tools/rust/cargo-binutils/default.nix
+++ b/pkgs/development/tools/rust/cargo-binutils/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
       cp ${./Cargo.lock} $out/Cargo.lock
     '';
 
-  cargoSha256 = "sha256-Zrl269PacPi81TrGTIDzmVndgGY5i5lYyspiOj43rpw=";
+  cargoSha256 = "sha256-6du86HxkDQAeIXScXBKuv0j4YZiG4O6IwVIXZnJgTO8=";
 
   meta = with lib; {
     description = "Cargo subcommands to invoke the LLVM tools shipped with the Rust toolchain.";
diff --git a/pkgs/development/tools/rust/cargo-bloat/default.nix b/pkgs/development/tools/rust/cargo-bloat/default.nix
index 51d19f5ad6fdf..c0baf9f396457 100644
--- a/pkgs/development/tools/rust/cargo-bloat/default.nix
+++ b/pkgs/development/tools/rust/cargo-bloat/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0bqzzh8vfqm7dpnb0fv4calnhsg9p3c5j06ycvg621p4zp4fydh2";
   };
 
-  cargoSha256 = "1323lcl8fa21pgx3jhwl4w9f8qz3jjxb5qdvib9jdzqxnnw320xs";
+  cargoSha256 = "0f7hmwrs99qdvhn4lvs8cqva68w2y04fy3ca1xlhk7ncdmclcc4g";
 
   meta = with lib; {
     description = "A tool and Cargo subcommand that helps you find out what takes most of the space in your executable";
diff --git a/pkgs/development/tools/rust/cargo-c/default.nix b/pkgs/development/tools/rust/cargo-c/default.nix
index 7db1ea7f374a9..9458cb030a7c8 100644
--- a/pkgs/development/tools/rust/cargo-c/default.nix
+++ b/pkgs/development/tools/rust/cargo-c/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     '';
   };
 
-  cargoSha256 = "1rmhg9xhljgd5yq3xs0fzw1b0bgz7jfpf5mr2gviwqahl5vxvfiq";
+  cargoSha256 = "0pxakfiidxfczh3harnjhb1zv340r812jxzwam8z2kyw3mkyhh8z";
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl ]
diff --git a/pkgs/development/tools/rust/cargo-criterion/default.nix b/pkgs/development/tools/rust/cargo-criterion/default.nix
index 664f3688eaf3e..38723bbf3c1ce 100644
--- a/pkgs/development/tools/rust/cargo-criterion/default.nix
+++ b/pkgs/development/tools/rust/cargo-criterion/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-NiuK+PexfF2wmA8drqqkv/RQlVwYLT3q2QWvV0ghJwg=";
   };
 
-  cargoSha256 = "sha256-A6Kkm/4MSAEJfehA6zSQJU+JwVIhKPcfMZCO9S6Zyx4=";
+  cargoSha256 = "sha256-5Z9Oz8jjyM3+cHAZ++thRDdNlb0Kj54Mg7JjF9JrLdw=";
 
   meta = with lib; {
     description = "Cargo extension for running Criterion.rs benchmarks";
diff --git a/pkgs/development/tools/rust/cargo-cross/default.nix b/pkgs/development/tools/rust/cargo-cross/default.nix
index f7ce0283f6ff4..276d6e50eeed8 100644
--- a/pkgs/development/tools/rust/cargo-cross/default.nix
+++ b/pkgs/development/tools/rust/cargo-cross/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256:1py5w4kf612x4qxi190ilsrx0zzwdzk9i47ppvqblska1s47qa2w";
   };
 
-  cargoSha256 = "sha256-3xSuTBcWRGn5HH7LnvwioeRWjehaPW1HCPjN5SUUVfo=";
+  cargoSha256 = "sha256-zk6cbN4iSHnyoeWupufVf2yQK6aq3S99uk9lqpjCw4c=";
 
   cargoPatches = [
     (fetchpatch {
diff --git a/pkgs/development/tools/rust/cargo-feature/default.nix b/pkgs/development/tools/rust/cargo-feature/default.nix
index f3fc148f029c3..062cb9f027d6a 100644
--- a/pkgs/development/tools/rust/cargo-feature/default.nix
+++ b/pkgs/development/tools/rust/cargo-feature/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0n5kzh756ghfs3cydlcn9mfvpgwy1cjg41h0nd9dbi5cr1fp9x1n";
   };
 
-  cargoSha256 = "0nvl5smibl81b826xcsrjx8p89lcfpj7wqdsvywnj7jd3p5ag03n";
+  cargoSha256 = "1jh1h6v4mxx03b4diw9325ga0k3js0czs504lx07hvbx8yai1wkq";
 
   buildInputs = lib.optional stdenv.isDarwin libiconv;
 
diff --git a/pkgs/development/tools/rust/cargo-fund/default.nix b/pkgs/development/tools/rust/cargo-fund/default.nix
index 70a2e6feca640..43655fd6a89e4 100644
--- a/pkgs/development/tools/rust/cargo-fund/default.nix
+++ b/pkgs/development/tools/rust/cargo-fund/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1jim5bgq3fc33391qpa1q1csbzqf4hk1qyfzwxpcs5pb4ixb6vgk";
   };
 
-  cargoSha256 = "181gcmaw2w5a6ah8a2ahsnc1zkadpmx1azkwh2a6x8myhzw2dxsj";
+  cargoSha256 = "1c2zryxn1bbg3ksp8azk9xmwfgwr6663hlmdv9c358hzqdfp9hli";
 
   # The tests need a GitHub API token.
   doCheck = false;
diff --git a/pkgs/development/tools/rust/cargo-geiger/default.nix b/pkgs/development/tools/rust/cargo-geiger/default.nix
index 3b2702c66f647..bd71a14b4a048 100644
--- a/pkgs/development/tools/rust/cargo-geiger/default.nix
+++ b/pkgs/development/tools/rust/cargo-geiger/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1z920p8i3gkjadyd6bqjk4i5yr5ds3m3sbcnf7plcqr69dsjr4b8";
   };
 
-  cargoSha256 = "1zh6fjfynkn4kgk1chigzd0sh4x1bagizyn7x6qyxgzc57a49bp7";
+  cargoSha256 = "1wf9758gyaxgyajjzy5phirg922n9wv0qmy67zjmxj56ayf0l9lm";
 
   checkPhase = ''
     ${cargo-insta}/bin/cargo-insta test
diff --git a/pkgs/development/tools/rust/cargo-generate/default.nix b/pkgs/development/tools/rust/cargo-generate/default.nix
index e4eb2965fd6f0..040109da3adbd 100644
--- a/pkgs/development/tools/rust/cargo-generate/default.nix
+++ b/pkgs/development/tools/rust/cargo-generate/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-RrDwq5VufMDsPlqRmBP3x2RUWU740L0L18noByO1IDY=";
   };
 
-  cargoSha256 = "sha256-W6+RGzCYJF9f44QaFDOI414/vCfKIuIOXoH+GYY0GwY=";
+  cargoSha256 = "sha256-/0pxEQFhovPRI4Knv5xq6+PHRuGN6+tF8CdK5X30LKI=";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/rust/cargo-inspect/default.nix b/pkgs/development/tools/rust/cargo-inspect/default.nix
index 9339660388b58..1644929074bba 100644
--- a/pkgs/development/tools/rust/cargo-inspect/default.nix
+++ b/pkgs/development/tools/rust/cargo-inspect/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = lib.optionals stdenv.isDarwin [ Security ];
 
-  cargoSha256 = "1ryi5qi1zz2yljyj4rn84q9zkzafc9w4nw3zc01hlzpnb1sjw5sw";
+  cargoSha256 = "069i8ydrp1pssnjq7d6mydwr7xh2cmcpzpf8bzd6nfjr6xx1pipr";
 
   meta = with lib; {
     description = "See what Rust is doing behind the curtains";
diff --git a/pkgs/development/tools/rust/cargo-play/default.nix b/pkgs/development/tools/rust/cargo-play/default.nix
index 5e12c1cae1d22..f5faed06faf93 100644
--- a/pkgs/development/tools/rust/cargo-play/default.nix
+++ b/pkgs/development/tools/rust/cargo-play/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "01r00akfmvpzp924yqqybd9s0pwiwxy8vklsg4m9ypzljc3nlv02";
   };
 
-  cargoSha256 = "0fvsdyivq5991ka6avh12aqdkjx0myk61kmzlr19p2vlfpg70q07";
+  cargoSha256 = "1xkscd9ci9vlkmbsaxvavrna1xpi16xcf9ri879lw8bdh7sa3nx8";
 
   # some tests require internet access
   doCheck = false;
diff --git a/pkgs/development/tools/rust/cargo-readme/default.nix b/pkgs/development/tools/rust/cargo-readme/default.nix
index 358c58bef4d42..fb45763b50be7 100644
--- a/pkgs/development/tools/rust/cargo-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-readme/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-/ufHHM13L83M3UYi6mjdhIjgXx7bZgzvR/X02Zsx7Fw=";
   };
 
-  cargoSha256 = "sha256-QVRl6xCvztWi5zAs3PXYR4saTqO5nTBPIjdlMiMXFTM=";
+  cargoSha256 = "sha256-Isd05qOuVBNfXOI5qsaDOhjF7QIKAG5xrZsBFK2PpQQ=";
 
   patches = [
     (fetchpatch {
diff --git a/pkgs/development/tools/rust/cargo-sweep/default.nix b/pkgs/development/tools/rust/cargo-sweep/default.nix
index f20bdb9cc1742..537275c68f69b 100644
--- a/pkgs/development/tools/rust/cargo-sweep/default.nix
+++ b/pkgs/development/tools/rust/cargo-sweep/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0zwdrh4z5x79qs8cwmwh3phzy4brw0ggv2qyf6pylv99vha5acyf";
   };
 
-  cargoSha256 = "1sxjc64g8h77a3dvzb99f1f72zrak1nh4jgfjfkw4yc4dhkpyrmz";
+  cargoSha256 = "023gbq8izpbaxq1pdzs8428k24myd2b8gi9g4kl2hx79yciiscnz";
 
   meta = with lib; {
     description = "A Cargo subcommand for cleaning up unused build files generated by Cargo";
diff --git a/pkgs/development/tools/rust/cargo-sync-readme/default.nix b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
index 54f21ab46270e..07c51c3163cbd 100644
--- a/pkgs/development/tools/rust/cargo-sync-readme/default.nix
+++ b/pkgs/development/tools/rust/cargo-sync-readme/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "1c38q87fyfmj6nlwdpavb1xxpi26ncywkgqcwbvblad15c6ydcyc";
   };
 
-  cargoSha256 = "1x15q6wv5278hm3ns2wmw4i8602g35y1jyv1b8wa5i4dnh52dj83";
+  cargoSha256 = "0vrbgs49ghhl4z4ljhghcs9fnbf7qx1an9kwbrgv9wng8m1dccah";
 
   meta = with lib; {
     description = "A cargo plugin that generates a Markdown section in your README based on your Rust documentation";
diff --git a/pkgs/development/tools/rust/cargo-valgrind/default.nix b/pkgs/development/tools/rust/cargo-valgrind/default.nix
index 3cfea7274355b..e1f26dc02b2e6 100644
--- a/pkgs/development/tools/rust/cargo-valgrind/default.nix
+++ b/pkgs/development/tools/rust/cargo-valgrind/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-PltYUU2O/D1PrU+K8JN4+aUVLzHCeNyIsXMU6HLodXE=";
   };
 
-  cargoSha256 = "sha256-zR826fFSCSsJxGKSc7ugrLwMDvsjRBjs4eotKTfhGqI=";
+  cargoSha256 = "sha256-XiQGkZ6pfyGkNPjpcPoY66qBl7ABTcRHCBjgmXSRrL0=";
 
   passthru = {
     updateScript = nix-update-script {
diff --git a/pkgs/development/tools/rust/cargo-whatfeatures/default.nix b/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
index 34440ce93058b..7041f0ebd6cdf 100644
--- a/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
+++ b/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "0vki37pxngg15za9c1z61dc6sqk0j59s0qhcf9hplnym4ib5kqx1";
   };
 
-  cargoSha256 = "sha256-nNV7UXjKZNFmTqW4H0qsNuBW9XOP2V9nfotewtI9mYE";
+  cargoSha256 = "sha256-ZEkSj/JzXXTHjaxBVS5RDk/ECvOPPjzH4eS3CmlQA9I=";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/rust/cargo-wipe/default.nix b/pkgs/development/tools/rust/cargo-wipe/default.nix
index c4c079c523b12..a59a124317b94 100644
--- a/pkgs/development/tools/rust/cargo-wipe/default.nix
+++ b/pkgs/development/tools/rust/cargo-wipe/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-sVekfGHg2wspP5/zJzXTXupspwJr4hQBucY5+8iUjUQ=";
   };
 
-  cargoSha256 = "sha256-IzEurJcPoM/JMQlSL7N84wzZddNpynrsjQEOUNms2YQ=";
+  cargoSha256 = "sha256-EoXgsWg1Rh7C+fIqvefkLdck4Yj3kox2ZAU3kn6nH8Q=";
 
   passthru = {
     updateScript = nix-update-script {
diff --git a/pkgs/development/tools/rust/cargo-xbuild/default.nix b/pkgs/development/tools/rust/cargo-xbuild/default.nix
index 8aa701779bc0c..e8d62c9252f33 100644
--- a/pkgs/development/tools/rust/cargo-xbuild/default.nix
+++ b/pkgs/development/tools/rust/cargo-xbuild/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "01whdjryz6zjsk4149h72w5xdjnkpcn5daf0xnsb59b0q38hjgg9";
   };
 
-  cargoSha256 = "1gcixzxca1yi4rvy55s986my6j0vx7n6fm1g5r4v4w0zgzlz4d89";
+  cargoSha256 = "036a50shzl6wdjk5wypkacx1kjwbyb4x1aqhbzgjgpxxxrf0lj16";
 
   meta = with lib; {
     description = "Automatically cross-compiles the sysroot crates core, compiler_builtins, and alloc";
diff --git a/pkgs/development/tools/rust/crate2nix/default.nix b/pkgs/development/tools/rust/crate2nix/default.nix
index b5a3486da71f8..e68eea50ff3df 100644
--- a/pkgs/development/tools/rust/crate2nix/default.nix
+++ b/pkgs/development/tools/rust/crate2nix/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   sourceRoot = "source/crate2nix";
 
-  cargoSha256 = "sha256-6V0ifH63/s5XLo4BCexPtvlUH0UQPHFW8YHF8OCH3ik=";
+  cargoSha256 = "sha256-shWhzCaH8ZttUcq82tA7T1hwNl6F1XJy7ansA5lt+Mw=";
 
   nativeBuildInputs = [ makeWrapper ];
 
diff --git a/pkgs/development/tools/rust/racerd/default.nix b/pkgs/development/tools/rust/racerd/default.nix
index 33d6721610e92..6ffa49aa6b9f6 100644
--- a/pkgs/development/tools/rust/racerd/default.nix
+++ b/pkgs/development/tools/rust/racerd/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     })
   ];
 
-  cargoSha256 = "1z0dh2j9ik66i6nww3z7z2gw7nhc0b061zxbjzamk1jybpc845lq";
+  cargoSha256 = "08zn65c5ivhn2qs02aiixyqwhywrw8kfvs0kgzxdzsipic47n2qq";
 
   # a nightly compiler is required unless we use this cheat code.
   RUSTC_BOOTSTRAP=1;
diff --git a/pkgs/development/tools/so/default.nix b/pkgs/development/tools/so/default.nix
index cd52f319bb94a..e7324ff7c5b97 100644
--- a/pkgs/development/tools/so/default.nix
+++ b/pkgs/development/tools/so/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-WAUPB4hhvroE1/8nQcgLVWgGyXcFh7qxdFg6UtQzM9A=";
   };
 
-  cargoSha256 = "sha256-wt6ClN9fpEAETk3kYeQRieTXnZQe4JEnQiA8CG4ZLog=";
+  cargoSha256 = "sha256-aaIzGvf+PvH8nz2BSJapi1P5gSVfXT92X62FqJ1Z2L0=";
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
diff --git a/pkgs/development/tools/the-way/default.nix b/pkgs/development/tools/the-way/default.nix
index 6d7fbef2f19b7..65c889aee8320 100644
--- a/pkgs/development/tools/the-way/default.nix
+++ b/pkgs/development/tools/the-way/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = lib.optionals stdenv.isDarwin  [ AppKit Security ];
 
-  cargoSha256 = "sha256-jTZso61Lyt6jprBxBAhvchgOsgM9y1qBleTxUx1jCnE=";
+  cargoSha256 = "sha256-sULjd+weixTQYFIQlluPwY4MFlZ1+vMMoMn4GP79oQs=";
   checkFlagsArray = lib.optionals stdenv.isDarwin [ "--skip=copy" ];
   dontUseCargoParallelTests = true;
 
diff --git a/pkgs/development/tools/trunk/default.nix b/pkgs/development/tools/trunk/default.nix
index 9284e1df45471..e8a7392ff3b1a 100644
--- a/pkgs/development/tools/trunk/default.nix
+++ b/pkgs/development/tools/trunk/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     then [ libiconv CoreServices Security ]
     else [ openssl ];
 
-  cargoSha256 = "Qv7knTmNYtw0tbyWhFIV7tYkQiwFxcNPAeNiGCyeV8s=";
+  cargoSha256 = "sha256-0ehz0ETNA2gOvTJUu8uq5H+bv4VXOJMq6AA8kn65m/Q=";
 
   meta = with lib; {
     homepage = "https://github.com/thedodd/trunk";
diff --git a/pkgs/development/tools/wasm-bindgen-cli/default.nix b/pkgs/development/tools/wasm-bindgen-cli/default.nix
index e566d4cb1c97a..a52f7b6550c1e 100644
--- a/pkgs/development/tools/wasm-bindgen-cli/default.nix
+++ b/pkgs/development/tools/wasm-bindgen-cli/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security curl ];
   nativeBuildInputs = [ pkg-config ];
 
-  cargoSha256 = "sha256-2UBCcA4eBrSHrJjJdDprsysiOObg2GrC7QtveAydbhk=";
+  cargoSha256 = "sha256-GUdoOms4FrNmPkELFX1PXcU/ww7CSN8JGHoCvnm73PQ=";
   cargoBuildFlags = [ "-p" pname ];
 
   meta = with lib; {
diff --git a/pkgs/development/tools/wasm-pack/default.nix b/pkgs/development/tools/wasm-pack/default.nix
index 9c6d3ed8cb896..5905189551215 100644
--- a/pkgs/development/tools/wasm-pack/default.nix
+++ b/pkgs/development/tools/wasm-pack/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     ./update-deps.patch
   ];
 
-  cargoSha256 = "0br7r8wz3knzgl3gjpq6z8w33my0yiaq711s1wih9jizhia02y5r";
+  cargoSha256 = "130gqvzpyr055xkqcy1r0y7l5k2dcv7n9zgr4ja7dm7iayzbwwi1";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/xcbuild/platforms.nix b/pkgs/development/tools/xcbuild/platforms.nix
index e20dc878b535b..0108ac8ef6973 100644
--- a/pkgs/development/tools/xcbuild/platforms.nix
+++ b/pkgs/development/tools/xcbuild/platforms.nix
@@ -1,4 +1,4 @@
-{ runCommand, lib, sdks, xcodePlatform, writeText }:
+{ stdenv, runCommand, lib, sdks, xcodePlatform, writeText }:
 
 let
 
@@ -15,23 +15,23 @@ let
   };
 
   # These files are all based off of Xcode spec fies found in
-  # /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Xcode/Speciications/.
+  # /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Xcode/PrivatePlugIns/IDEOSXSupportCore.ideplugin/Contents/Resources.
 
-  # Based off of the MacOSX Architectures.xcpsec file. All i386 stuff
-  # is removed because NixPkgs only supports darwin-x86_64.
+  # Based off of the "MacOSX Architectures.xcspec" file. All i386 stuff
+  # is removed because NixPkgs only supports darwin-x86_64 and darwin-arm64.
   Architectures = [
     {
       Identifier = "Standard";
       Type = "Architecture";
-      Name = "Standard Architectures (64-bit Intel)";
-      RealArchitectures = [ "x86_64" ];
+      Name = "Standard Architectures (Apple Silicon, 64-bit Intel)";
+      RealArchitectures = [ "arm64" "x86_64" ];
       ArchitectureSetting = "ARCHS_STANDARD";
     }
     {
       Identifier = "Universal";
       Type = "Architecture";
-      Name = "Universal (64-bit Intel)";
-      RealArchitectures = [ "x86_64" ];
+      Name = "Universal (Apple Silicon, 64-bit Intel)";
+      RealArchitectures = [ "arm64" "x86_64" ];
       ArchitectureSetting = "ARCHS_STANDARD_32_64_BIT";
     }
     {
@@ -43,25 +43,25 @@ let
     {
       Identifier = "Standard64bit";
       Type = "Architecture";
-      Name = "64-bit Intel";
-      RealArchitectures = [ "x86_64" ];
+      Name = "Apple Silicon, 64-bit Intel";
+      RealArchitectures = [ "arm64" "x86_64" ];
       ArchitectureSetting = "ARCHS_STANDARD_64_BIT";
     }
     {
-      Identifier = "x86_64";
+      Identifier = if stdenv.isAarch64 then "arm64" else "x86_64";
       Type = "Architecture";
-      Name = "Intel 64-bit";
+      Name = "Apple Silicon or Intel 64-bit";
     }
     {
       Identifier = "Standard_Including_64_bit";
       Type = "Architecture";
       Name = "Standard Architectures (including 64-bit)";
-      RealArchitectures = [ "x86_64" ];
+      RealArchitectures = [ "arm64" "x86_64" ];
       ArchitectureSetting = "ARCHS_STANDARD_INCLUDING_64_BIT";
     }
   ];
 
-  # Based off of the MacOSX Package Types.xcpsec file. Only keep the
+  # Based off of the "MacOSX Package Types.xcspec" file. Only keep the
   # bare minimum needed.
   PackageTypes = [
     {
@@ -169,7 +169,7 @@ let
     }
   ];
 
-  # Based off of the MacOSX Product Types.xcpsec file. All
+  # Based off of the "MacOSX Product Types.xcspec" file. All
   # bundles/wrapper are removed, because we prefer dynamic products in
   # NixPkgs.
   ProductTypes = [
diff --git a/pkgs/development/tools/xcbuild/wrapper.nix b/pkgs/development/tools/xcbuild/wrapper.nix
index 4f74b093717bf..ca69bbe907df5 100644
--- a/pkgs/development/tools/xcbuild/wrapper.nix
+++ b/pkgs/development/tools/xcbuild/wrapper.nix
@@ -28,7 +28,7 @@ let
   };
 
   platforms = callPackage ./platforms.nix {
-    inherit sdks xcodePlatform;
+    inherit sdks xcodePlatform stdenv;
   };
 
   xcconfig = writeText "nix.xcconfig" ''
diff --git a/pkgs/development/web/twitter-bootstrap/default.nix b/pkgs/development/web/twitter-bootstrap/default.nix
index b8a7e6a4b8f8c..65625ca7d21fc 100644
--- a/pkgs/development/web/twitter-bootstrap/default.nix
+++ b/pkgs/development/web/twitter-bootstrap/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "bootstrap";
-  version = "5.0.0";
+  version = "5.0.1";
 
   src = fetchurl {
     url = "https://github.com/twbs/bootstrap/releases/download/v${version}/${pname}-${version}-dist.zip";
-    sha256 = "sha256-CsPvq8exUL2k/b/QK9c2S68DIsDDR8qxho0WgDJ3/Vs=";
+    sha256 = "sha256-eep9s1YxTHeDDh+WhDMENho/N3AfJHVitis22bIGa6w=";
   };
 
   nativeBuildInputs = [ unzip ];