See the discussion at https://discuss.python.org/t/dropping-32-bit-packages

The builds are difficult to maintain, suffer bit rot, and are not popular.

Another option is to stop testing f2py on this platform, which is the reason we try to install a fortran compiler. Building NumPy does not require the fortran compiler, it is only for tests.

Edit: not true, wrapping the OpenBLAS library does require the fortran runtime.