This makes packages use lapack and blas, which can wrap different
BLAS/LAPACK implementations.
treewide: cleanup from blas/lapack changes
A few issues in the original treewide:
- can’t assume blas64 is a bool
- unused commented code
The issue is that the library files were not copied to $out with the
existing `installTargets` definition.
I noticed this problem on darwin, but I do not know if it is a
darwin-only problem.
