[magnetometer]

Python wheels don't run arbitrary code on install, but source distributions do. And you can upload both to pypy. So you would have to run

pip install <package> --only-binary :all:

to only install wheels and fail otherwise.

[Balinares]

Fair point -- I was only thinking wheels, but you are right.

Would source distributions work as a vector for automated propagation, though? If I'm not mistaken, there's no universal standard for building from source distributions.