starting phase `set-SOURCE-DATE-EPOCH'
phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds
starting phase `set-paths'
environment variable `PATH' set to `/gnu/store/7fcpxl5vzaas7kpnww6pq97d2hkryh2n-python-wrapper-3.8.2/bin:/gnu/store/f771ysvszdaf015cf07vviz1hx57fyjp-python-pytest-5.3.5/bin:/gnu/store/am3imbjafa1wdvw9j6qabrxc09w169lz-tar-1.32/bin:/gnu/store/chqjscapsg928dy8pg6yrdhw3ypk8c9x-gzip-1.10/bin:/gnu/store/k3n5jh5579g2b17qmd2w89z2fy45pmr3-bzip2-1.0.8/bin:/gnu/store/k8ksi57ghm301zr0v7aq2vl2fa8hxfqi-xz-5.2.4/bin:/gnu/store/5ckix15mw8r509g68fbm7rla51lmd2zq-file-5.38/bin:/gnu/store/m8fnsfqs18c3srjiaw4frqadb9rqsq16-diffutils-3.7/bin:/gnu/store/2cfnrxy8icrz3sxfn86k0klmvsnj1n82-patch-2.7.6/bin:/gnu/store/0bmzacdzdhi41kkjbsq7iakwjzxkv6fm-findutils-4.7.0/bin:/gnu/store/x9qzb42hmzszg9y16m1gbz3vv54yyi00-gawk-5.0.1/bin:/gnu/store/qy7gpiba7s7ylpfxaay6i76rk892j52n-sed-4.8/bin:/gnu/store/74d5jq5sj2fhy5j0j07jqdclf8nyxgqn-grep-3.4/bin:/gnu/store/wy177cwa387g9kaf3ss716d4fhzb21wx-coreutils-8.32/bin:/gnu/store/wsxnp4k7mp7b705kxp94j7hs8as5fmsl-make-4.3/bin:/gnu/store/7zp9ifpgm3zj481nk6jg1im13g4mza2g-bash-minimal-5.0.16/bin:/gnu/store/y4iy1jvfq07gxynkb9jl1f69jmy349vi-ld-wrapper-0/bin:/gnu/store/1iwrsjwmhcdifc8i3v7qdr59k6gq4z24-binutils-2.34/bin:/gnu/store/z8954h4nvgxwcyy2in8c1l11g199m2yb-gcc-7.5.0/bin:/gnu/store/llkv94k15spryi6zf0gjm0fp7m8k3i8g-glibc-2.31/bin:/gnu/store/llkv94k15spryi6zf0gjm0fp7m8k3i8g-glibc-2.31/sbin:/gnu/store/8m9q5aa0dqwhcybgyy5xpcw9cig8qlff-python-3.8.2/bin'
environment variable `PYTHONPATH' set to `/gnu/store/78cnn9c4f3lsqlz5mpr4q3q0ipzi2k2a-python-mock-3.0.5/lib/python3.8/site-packages:/gnu/store/f771ysvszdaf015cf07vviz1hx57fyjp-python-pytest-5.3.5/lib/python3.8/site-packages:/gnu/store/8m9q5aa0dqwhcybgyy5xpcw9cig8qlff-python-3.8.2/lib/python3.8/site-packages:/gnu/store/bj3l3y7hagz7xacbxwavnamn1naca43l-python-six-1.14.0/lib/python3.8/site-packages:/gnu/store/82jb75vk5yp494wn8nravs15brq6gfw2-python-wcwidth-0.1.8/lib/python3.8/site-packages:/gnu/store/kpwzjhnbsppd2ay0vymaflkbwgm85kc6-python-six-bootstrap-1.14.0/lib/python3.8/site-packages:/gnu/store/xg7y1x6c781l1dk9jrg6ji705d489dr3-python-py-1.8.1/lib/python3.8/site-packages:/gnu/store/6sgq13l47rm4cwiwbn5gm3w37s6xnz2y-python-pluggy-0.13.1/lib/python3.8/site-packages:/gnu/store/wkc7xbizab6xrnp1p1baksvp55v87qfr-python-packaging-bootstrap-20.0/lib/python3.8/site-packages:/gnu/store/cpljikvpa97iwi7yx7d9rb3lqh58z3ri-python-more-itertools-8.2.0/lib/python3.8/site-packages:/gnu/store/f980kdj9x3sjsmhkw5sggzg9py8ldls6-python-attrs-bootstrap-19.3.0/lib/python3.8/site-packages:/gnu/store/fd0ysb8l95bmlbn563jp42lkggfvjyzc-python-atomicwrites-1.3.0/lib/python3.8/site-packages:/gnu/store/08pwwi07plk65wz569acz35n17ifjw8p-python-pyparsing-2.4.6/lib/python3.8/site-packages'
environment variable `BASH_LOADABLES_PATH' unset
environment variable `C_INCLUDE_PATH' set to `/gnu/store/k3n5jh5579g2b17qmd2w89z2fy45pmr3-bzip2-1.0.8/include:/gnu/store/k8ksi57ghm301zr0v7aq2vl2fa8hxfqi-xz-5.2.4/include:/gnu/store/5ckix15mw8r509g68fbm7rla51lmd2zq-file-5.38/include:/gnu/store/x9qzb42hmzszg9y16m1gbz3vv54yyi00-gawk-5.0.1/include:/gnu/store/wsxnp4k7mp7b705kxp94j7hs8as5fmsl-make-4.3/include:/gnu/store/1iwrsjwmhcdifc8i3v7qdr59k6gq4z24-binutils-2.34/include:/gnu/store/z8954h4nvgxwcyy2in8c1l11g199m2yb-gcc-7.5.0/include:/gnu/store/llkv94k15spryi6zf0gjm0fp7m8k3i8g-glibc-2.31/include:/gnu/store/8m9q5aa0dqwhcybgyy5xpcw9cig8qlff-python-3.8.2/include:/gnu/store/72z9rxrrmfw1xx9gf27jm2s8h5h0fkh0-linux-libre-headers-5.4.20/include'
environment variable `CPLUS_INCLUDE_PATH' set to `/gnu/store/k3n5jh5579g2b17qmd2w89z2fy45pmr3-bzip2-1.0.8/include:/gnu/store/k8ksi57ghm301zr0v7aq2vl2fa8hxfqi-xz-5.2.4/include:/gnu/store/5ckix15mw8r509g68fbm7rla51lmd2zq-file-5.38/include:/gnu/store/x9qzb42hmzszg9y16m1gbz3vv54yyi00-gawk-5.0.1/include:/gnu/store/wsxnp4k7mp7b705kxp94j7hs8as5fmsl-make-4.3/include:/gnu/store/1iwrsjwmhcdifc8i3v7qdr59k6gq4z24-binutils-2.34/include:/gnu/store/z8954h4nvgxwcyy2in8c1l11g199m2yb-gcc-7.5.0/include/c++:/gnu/store/z8954h4nvgxwcyy2in8c1l11g199m2yb-gcc-7.5.0/include:/gnu/store/llkv94k15spryi6zf0gjm0fp7m8k3i8g-glibc-2.31/include:/gnu/store/8m9q5aa0dqwhcybgyy5xpcw9cig8qlff-python-3.8.2/include:/gnu/store/72z9rxrrmfw1xx9gf27jm2s8h5h0fkh0-linux-libre-headers-5.4.20/include'
environment variable `LIBRARY_PATH' set to `/gnu/store/78cnn9c4f3lsqlz5mpr4q3q0ipzi2k2a-python-mock-3.0.5/lib:/gnu/store/f771ysvszdaf015cf07vviz1hx57fyjp-python-pytest-5.3.5/lib:/gnu/store/k3n5jh5579g2b17qmd2w89z2fy45pmr3-bzip2-1.0.8/lib:/gnu/store/k8ksi57ghm301zr0v7aq2vl2fa8hxfqi-xz-5.2.4/lib:/gnu/store/5ckix15mw8r509g68fbm7rla51lmd2zq-file-5.38/lib:/gnu/store/x9qzb42hmzszg9y16m1gbz3vv54yyi00-gawk-5.0.1/lib:/gnu/store/1iwrsjwmhcdifc8i3v7qdr59k6gq4z24-binutils-2.34/lib:/gnu/store/llkv94k15spryi6zf0gjm0fp7m8k3i8g-glibc-2.31/lib:/gnu/store/m4l52mw8m0amgy4j129z5j0syryb7pkg-glibc-2.31-static/lib:/gnu/store/vispxhcwmvasm225pm373jhfn21q1sa1-glibc-utf8-locales-2.31/lib:/gnu/store/8m9q5aa0dqwhcybgyy5xpcw9cig8qlff-python-3.8.2/lib:/gnu/store/bj3l3y7hagz7xacbxwavnamn1naca43l-python-six-1.14.0/lib:/gnu/store/82jb75vk5yp494wn8nravs15brq6gfw2-python-wcwidth-0.1.8/lib:/gnu/store/kpwzjhnbsppd2ay0vymaflkbwgm85kc6-python-six-bootstrap-1.14.0/lib:/gnu/store/xg7y1x6c781l1dk9jrg6ji705d489dr3-python-py-1.8.1/lib:/gnu/store/6sgq13l47rm4cwiwbn5gm3w37s6xnz2y-python-pluggy-0.13.1/lib:/gnu/store/wkc7xbizab6xrnp1p1baksvp55v87qfr-python-packaging-bootstrap-20.0/lib:/gnu/store/cpljikvpa97iwi7yx7d9rb3lqh58z3ri-python-more-itertools-8.2.0/lib:/gnu/store/f980kdj9x3sjsmhkw5sggzg9py8ldls6-python-attrs-bootstrap-19.3.0/lib:/gnu/store/fd0ysb8l95bmlbn563jp42lkggfvjyzc-python-atomicwrites-1.3.0/lib:/gnu/store/08pwwi07plk65wz569acz35n17ifjw8p-python-pyparsing-2.4.6/lib'
environment variable `GUIX_LOCPATH' set to `/gnu/store/vispxhcwmvasm225pm373jhfn21q1sa1-glibc-utf8-locales-2.31/lib/locale'
phase `set-paths' succeeded after 0.1 seconds
starting phase `install-locale'
using 'en_US.utf8' locale for category "LC_ALL"
phase `install-locale' succeeded after 0.0 seconds
starting phase `unpack'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/.editorconfig' -> `./.editorconfig'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/.env' -> `./.env'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/.gitignore' -> `./.gitignore'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/.travis.yml' -> `./.travis.yml'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/.undertake' -> `./.undertake'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/ACKNOWLEDGEMENTS.md' -> `./ACKNOWLEDGEMENTS.md'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/CHANGELOG.md' -> `./CHANGELOG.md'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/LICENSE' -> `./LICENSE'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/MANIFEST.in' -> `./MANIFEST.in'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/README.rst' -> `./README.rst'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/appveyor.yml' -> `./appveyor.yml'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/example.gif' -> `./example.gif'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/logo.png' -> `./logo.png'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/requirements.txt' -> `./requirements.txt'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/runtests.py' -> `./runtests.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/setup.cfg' -> `./setup.cfg'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/setup.py' -> `./setup.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/test_isort.py' -> `./test_isort.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/tox.ini' -> `./tox.ini'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/kate_plugin/isort_plugin.py' -> `./kate_plugin/isort_plugin.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/kate_plugin/isort_plugin_old.py' -> `./kate_plugin/isort_plugin_old.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/kate_plugin/isort_plugin_ui.rc' -> `./kate_plugin/isort_plugin_ui.rc'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/kate_plugin/katepart_isort.desktop' -> `./kate_plugin/katepart_isort.desktop'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/__init__.py' -> `./isort/__init__.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/__main__.py' -> `./isort/__main__.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/hooks.py' -> `./isort/hooks.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/isort.py' -> `./isort/isort.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/main.py' -> `./isort/main.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/natural.py' -> `./isort/natural.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/pie_slice.py' -> `./isort/pie_slice.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/pylama_isort.py' -> `./isort/pylama_isort.py'
`/gnu/store/8sc1bhna9ir9igbcmb23a333pvb43w6c-python-isort-4.3.4-checkout/isort/settings.py' -> `./isort/settings.py'
phase `unpack' succeeded after 0.0 seconds
starting phase `ensure-no-mtimes-pre-1980'
phase `ensure-no-mtimes-pre-1980' succeeded after 0.0 seconds
starting phase `enable-bytecode-determinism'
phase `enable-bytecode-determinism' succeeded after 0.0 seconds
starting phase `patch-usr-bin-file'
phase `patch-usr-bin-file' succeeded after 0.0 seconds
starting phase `patch-source-shebangs'
patch-shebang: ./.env: changing `/bin/bash' to `/gnu/store/7zp9ifpgm3zj481nk6jg1im13g4mza2g-bash-minimal-5.0.16/bin/bash'
patch-shebang: ./isort/main.py: changing `/usr/bin/env python' to `/gnu/store/7fcpxl5vzaas7kpnww6pq97d2hkryh2n-python-wrapper-3.8.2/bin/python'
patch-shebang: ./runtests.py: changing `/usr/bin/env python' to `/gnu/store/7fcpxl5vzaas7kpnww6pq97d2hkryh2n-python-wrapper-3.8.2/bin/python'
patch-shebang: ./setup.py: changing `/usr/bin/env python' to `/gnu/store/7fcpxl5vzaas7kpnww6pq97d2hkryh2n-python-wrapper-3.8.2/bin/python'
phase `patch-source-shebangs' succeeded after 0.0 seconds
starting phase `patch-generated-file-shebangs'
phase `patch-generated-file-shebangs' succeeded after 0.0 seconds
starting phase `build'
running "python setup.py" with command "build" and parameters ()
running build
running build_py
creating build
creating build/lib
creating build/lib/isort
copying isort/__init__.py -> build/lib/isort
copying isort/__main__.py -> build/lib/isort
copying isort/hooks.py -> build/lib/isort
copying isort/isort.py -> build/lib/isort
copying isort/natural.py -> build/lib/isort
copying isort/pie_slice.py -> build/lib/isort
copying isort/pylama_isort.py -> build/lib/isort
copying isort/settings.py -> build/lib/isort
copying isort/main.py -> build/lib/isort
phase `build' succeeded after 0.8 seconds
starting phase `install'
running "python setup.py" with command "install" and parameters ("--prefix=/gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4" "--single-version-externally-managed" "--root=/")
running install
running build
running build_py
running install_lib
creating /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4
creating /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib
creating /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8
creating /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages
creating /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/__init__.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/__main__.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/hooks.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/isort.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/natural.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/pie_slice.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/pylama_isort.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/settings.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
copying build/lib/isort/main.py -> /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/__init__.py to __init__.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/__main__.py to __main__.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/hooks.py to hooks.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/isort.py to isort.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/natural.py to natural.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/pie_slice.py to pie_slice.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/pylama_isort.py to pylama_isort.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/settings.py to settings.cpython-38.pyc
byte-compiling /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort/main.py to main.cpython-38.pyc
running install_egg_info
running egg_info
creating isort.egg-info
writing isort.egg-info/PKG-INFO
writing dependency_links to isort.egg-info/dependency_links.txt
writing entry points to isort.egg-info/entry_points.txt
writing requirements to isort.egg-info/requires.txt
writing top-level names to isort.egg-info/top_level.txt
writing manifest file 'isort.egg-info/SOURCES.txt'
reading manifest file 'isort.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'isort.egg-info/SOURCES.txt'
Copying isort.egg-info to /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib/python3.8/site-packages/isort-4.3.4-py3.8.egg-info
running install_scripts
Installing isort script to /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/bin
phase `install' succeeded after 0.9 seconds
starting phase `wrap'
find-files: /gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/sbin: No such file or directory
phase `wrap' succeeded after 0.0 seconds
starting phase `check'
running "python setup.py" with command "test" and parameters ()
running test
running egg_info
writing isort.egg-info/PKG-INFO
writing dependency_links to isort.egg-info/dependency_links.txt
writing entry points to isort.egg-info/entry_points.txt
writing requirements to isort.egg-info/requires.txt
writing top-level names to isort.egg-info/top_level.txt
reading manifest file 'isort.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'isort.egg-info/SOURCES.txt'
running build_ext
============================= test session starts ==============================
platform linux -- Python 3.8.2, pytest-5.3.5, py-1.8.1, pluggy-0.13.1
rootdir: /tmp/guix-build-python-isort-4.3.4.drv-0/source
collected 119 items

test_isort.py .......................................................... [ 48%]
.............................................................            [100%]

=============================== warnings summary ===============================
isort/pie_slice.py:362
  /tmp/guix-build-python-isort-4.3.4.drv-0/source/isort/pie_slice.py:362: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working
    class OrderedSet(collections.MutableSet):

-- Docs: https://docs.pytest.org/en/latest/warnings.html
======================== 119 passed, 1 warning in 2.52s ========================
phase `check' succeeded after 3.8 seconds
starting phase `patch-shebangs'
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starting phase `strip'
stripping binaries in "/gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib" with "strip" and flags ("--strip-debug" "--enable-deterministic-archives")
stripping binaries in "/gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/bin" with "strip" and flags ("--strip-debug" "--enable-deterministic-archives")
phase `strip' succeeded after 0.0 seconds
starting phase `validate-runpath'
validating RUNPATH of 0 binaries in "/gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/lib"...
validating RUNPATH of 0 binaries in "/gnu/store/1zgicdmvkjnnjgdvgg46fk463x9i4vam-python-isort-4.3.4/bin"...
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starting phase `install-license-files'
installing 1 license files from '.'
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