New v20.0.3 missing __version__?

[rdbisme]

I'm updating the virtualenv package on Macports and I'm getting this error:

:info:build AttributeError: module 'virtualenv' has no attribute '__version__'
:info:build Command failed:  cd "/opt/local/var/macports/build/_Users_rubendibattista_git_macports-ports_python_py-virtualenv/py37-virtualenv/work/virtualenv-20.0.3" && /opt/local/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 setup.py --no-user-cfg build -j8

(I actually can't find the version.py module where in virtualenv.__init__.py the version is imported from... But it's also not present in v20.0.2, so I guess there's some magic somewhere that stopped working... :))

[gaborbernat]

How is macports generating the package? Via wheel sdist?

[gaborbernat]

Do you provision the build requirementes per pep 517?