Yesterday I also discovered this thread on NixOS bug tracker:
https://github.com/NixOS/nixpkgs/pull/156974

They apply the same technique and remove dirtier workaround they had
before: https://github.com/NixOS/nixpkgs/pull/153104/files

Also, they patch the makefile template instead of source code, which
maybe a little cleaner solution than the one I proposed above.

-- 
Best regards,
Andrew Tropin