@scheibelp This PR breaks the numexpr package when used with [email protected]:. numexpr calls the numpy config which reads site.cfg to determine where its libraries are located. As of [email protected], this no longer works. See pydata/numexpr#340 for the error message.

What should we do? Open a numpy issue? Revert the PR? Only apply the PR for older versions of numpy? Remove the empty sections of site.cfg post-installation?

@adamjstewart it looks like you have created an alternative solution to what was done here in #12170 (comment), specifically with

Fixes a bug where numpy would pick up the first BLAS/LAPACK it found, regardless of what was asked for (numpy/numpy#14146)

That's what this was going for, so it appears that at least for numpy 1.17.x and onward, the solution here is not required. It looks like https://github.com/numpy/numpy/pull/13132 was merged as of March 15 2019 so versions of numpy before 1.17.x may still benefit from this PR.