Forcing `pip` to recompile a previously installed package (numpy) after switching to a different Python binary
You can use --no-binary and --ignore-installed to rebuild a package as follows
pip install --user --force-reinstall --ignore-installed --no-binary :all: PackageName
The problem is solved by pip uninstalling numpy (or any other troublesome package), then running
pip install numpy --no-cache-dirto prevent pip from simply taking the cached installation and repeating it.