Historically, we required `--platform` when running cibuildwheel outside of CI, because cibuildwheel would attempt to globally install Python interpreters and some packages.
That was fixed in https://github.com/pypa/cibuildwheel/pull/974 a couple of years ago. As a result, there's no reason to require --platform these days, the `auto` behaviour is perfectly fine for dev machines.
It also makes running tests locally simpler, one can just do `pytest test/test_0_basic.py` (or `nox -s tests -- test/test_0_basic.py`) and not have to worry about setting CIBW_PLATFORM most of the time.
Joe Rickerby
4db49f5485