Can not install development version from source #1104
Description
After installing and activating the virtual environment:
python -m venv ~/virtualenvs/attrsdev/
source ~/.virtualenvs/attrsdev/bin/activate
I try to install the development version, but run into the following error:
$ cd repos/attrs/
$ python -m pip install --upgrade pip wheel
$ python -m pip install -e '.[dev]'
.....
ERROR: Cannot install attrs, attrs[dev]==0.1.dev1265, attrs[docs,tests]==0.1.dev1265 and attrs[tests-no-zope]==0.1.dev1265 because these package versions have conflicting dependencies.
The conflict is caused by:
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.2.1 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.2.0 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.1.3 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.1.2 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.1.1 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.1.0 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.0.1 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 7.0.0 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.5 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.4 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.3 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.2 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.1 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.2.0 depends on attrs>=19.2.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.1.2 depends on attrs>=17.4.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.1.1 depends on attrs>=17.4.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.1.0 depends on attrs>=17.4.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[docs,tests] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
attrs[tests-no-zope] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
pytest 6.0.2 depends on attrs>=17.4.0
attrs[dev] 0.1.dev1265 depends on attrs 0.1.dev1265 (from /home/user/repos/attrs)
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts