Devlin-Mallory

Giving it both `CPPFLAGS="-I/opt/homebrew/opt/libomp/include" LDFLAGS="-L/opt/homebrew/opt/libomp/lib"` seemed to do the trick in terms of the OpenMP support issue- thank you! (I also removed the CC and CXX arguments.) Two more issues...

> Why not also pass the variable option? You can just pass `opts` which includes both. Ah, good call - added that now.