Right, I tested only the Nix builds and forgot we use
python setup.py bdist in case of
setuptools. Changed the instruction.
I assume this is on Windows. I cannot reproduce it otherwise.
The Meson instructions not much else aside from using the build tools prompt as you did.
I have no recent experience of using Python on Windows so can’t look into this any further. It’s a pity though it did not work out of the box.