kind nudge @molinav

Hi @molinav does this align with your intention?

For the record: this seems to be the only way right as of today (12 June 2025) to create wheels from sdists using cibuildwheel.

It is possible to set the environment variable CIBW_BUILD_FRONTEND to either "build" or "pip" (see here), but:

• "pip" delegates to python -m pip wheel.
• "build" delegates to python -m build --wheel. If this command were python -m build, this would create the wheel from the sdist (since build 0.5.0), but the --wheel switch changes the behaviour of python -m build and creates the wheel directly from the given input folder.

In the job building the data packages, I have changed the call python -m build --sdist --wheel to python -m build. The latter guarantees that the wheels are build from the sdists, the first one builds sdists and wheels separately.

I am merging this once the last round of pipelines succeed (it should). Then I will move to the docs PR and resolve the conflicts created by my changes here (the docs PR also includes changes from this PR).