these 2 derivations will be built:
  /nix/store/jjqiks1y7bki89sjkdzwhrkkx0spscr8-freebuff-linux-x64.tar.gz.drv
  /nix/store/71zabwg0mkvp2byj195244rkbvd4n33i-freebuff-0.0.161.drv