Comment 42 for bug 1991606

Here is another example of a tool that fails to work as expected because it expects strict compliance to PEP 440: https://github.com/tox-dev/pipdeptree/issues/235 .

This affects older Ubuntu releases like Bionic and Focal too.
I hope adding another example like this helps to justify fixing this on older versions of Ubuntu as well, even if setuptools is not affected there.