.homebrew-build-env: Set CPATH, LIBRARY_PATH instead of CPPFLAGS, LDFLAGS #29562
Description
This is to fix a build error of pillow that arises when /usr/local/include/zip.h
shadows an include file "Zip.h". As reported in
CC: @slel @jhpalmieri @dimpase
Component: build
Author: Matthias Koeppe
Branch: e74c6c2
Reviewer: John Palmieri
Issue created by migration from https://trac.sagemath.org/ticket/29562