Hi Fons,

Le 2022-09-22 à 03 h 56, Fons Adriaensen a écrit :

      error: invalid command 'bdist_wheel'

It looks like wheel is not installed (locally or globally). Try installing it with "pip install wheel", or install it on the system (python3-wheel on Debian); it could be enough to fix the issue.

python version is 3.10.5

My system still use python version 3.8, so for a test I installed python version 3.10.5 using pyenv (https://github.com/pyenv/pyenv) :

pyenv install 3.10.5

To create and activate a virtualenv for my test I used:
https://github.com/pyenv/pyenv-virtualenv

pyenv virtualenv 3.10.5 zita
pyenv activate zita

But that was not enough; compiling your extension failed because wheel is missing in the virtualenv, so I installed it using "python3 -m pip install wheel", then compiling succeeded. There was one warning about the version of pip; to avoid it (before compiling): "python3 -m pip install --upgrade pip"

After my test session, I deactivated the virtualenv using "source deactivate", then I deleted the virtualenv using "pyenv virtualenv-delete zita"

Another difference IIRC is that on my main system pip would set up
a virtual environment, while this doesn't seem to happen here.

To my knowledge, pip does not install a virtual environment, but a virtual environment includes pip. Because wheel is not installed by default, adding a build step (in the makefile) could help: "$(PIP) install wheel".

Have things changed again ????

Python is changing faster now, so testing on different versions is a good idea.

Marc