these 2 derivations will be built:
  /nix/store/frqvbgwpvigdsinl5kvqbnjilllc94w9-amp-linux-x64.drv
  /nix/store/jnh9gisxnbdgi7nr439wyar7ls0cia4d-amp-0.0.1789588847-gf375db.drv