I somewhat forgot that NumPy hasn't yet moved, so this really needs to wait until GHA has proper runner support, and some of the lower ecosystem moves forward.

OK, while technically we recently dropped NumPy as a build requirement, this still fails becausemeson-python doesn't support cross-compiling. Apparently the macOS stuff was just asetuptools-specific thing that they also implemented, but more generic cross-compiling support is not really a standardized thing in the Python ecosystem, even if that's whatcibuildwheel is trying to do here.

GitHub Actions now has native Windows-on-ARM runners:https://github.blog/changelog/2025-04-14-windows-arm64-hosted-runners-now-available-in-public-preview/

So this is now able to build, but I've had to skip testing right now because NumPy wheels are not available (see linked issue.)

NumPy wheels were just merged today. It looks like nightlies are uploaded Sunday and Wednesday mornings, so by next week we should be able to try testing this out.