About tmt issues. I've noticed an issue is that it is downloading numpy instead of using the installed version 1.24.4. I'll make a PR fix for that (#464). Over there we should stick with the fedora packages instead of PyPI, otherwise there would be little information compared to the built-in CI. I could make it work with either if you find it useful though.

NumPy just released 3.12 wheels (1.26.0b1) without having to use the nightly wheelhouse, so this should be much easier now.

I'm guessing you are not disabling build isolation, which is why it's downloading the build environments (probably including a released version of scikit-build-core?). Probably would be better to disable build isolation and use only Fedora supplied packages, I think.

I'm guessing you are not disabling build isolation, which is why it's downloading the build environments (probably including a released version of scikit-build-core?). Probably would be better to disable build isolation and use only Fedora supplied packages, I think.

Indeed, I forgot to add that. I've added both --no-build-isolation and --no-index in #464. That seems to fix the issue there even with numpy 1.24

@henryiii can you merge #464 first and rebase this one on top of it? I think the dependencies won't be satisfied

Since fedora builds older versions of NumPy for 3.12, adding this breaks the non-isolated builds. A better solution for testing then probably is to just enable pre-releases (PIP_PRE=1).

Closing in favor of #464.