I vaguely recall there was a change in the setup_py stuff that would allow using

cython

or

mypyc

called via a custom setup.py... Was that ever taken anywhere? I think it was a PR from @happy-kitchen-89482?

yep, both should work

Just testing this, it works! I think the part I didnt' know to look for was mypyc see on the python_dist. Having said that, I don't know why - since it can be baked into setup.py easily 🤦‍♂️