Comment by Didier Vibert on 2021-05-21 10:39:31:
avec pip 21.1.1 (python 3.7)

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Building wheel for pylibamazed (setup.py) ... done
Created wheel for pylibamazed: filename=pylibamazed-0.22.dev307b3b1c-cp37-cp37m-linux_x86_64.whl size=1522880 sha256=a9e194897680b124e39b264faf7429c19240abc83d23346f8520d4adc34af37a
Stored in directory: /home/dvibert/.cache/pip/wheels/49/92/aa/28fb8e7740c78737a204804ca9eda8169e170e6278b8bea771
WARNING: Built wheel for pylibamazed is invalid: Metadata 1.2 mandates PEP 440 version, but '0.22.dev307b3b1c' is not
Failed to build pylibamazed
Installing collected packages: pylibamazed
Attempting uninstall: pylibamazed
Found existing installation: pylibamazed 0.22.deve4041213
Uninstalling pylibamazed-0.22.deve4041213:
Successfully uninstalled pylibamazed-0.22.deve4041213
Running setup.py install for pylibamazed ... done
DEPRECATION: pylibamazed was installed using the legacy 'setup.py install' method, because a wheel could not be built for it. A possible replacement is to fix the wheel build issue reported above. You can find discussion regarding this at https://github.com/pypa/pip/issues/8368.

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Comment by Pierre-yves Chabaud on 2021-06-14 16:29:09:
Fixed in #6504 . No more change to commit for this issue.