these 2 derivations will be built:
  /nix/store/2jfvbzp56v2m072jgf1gzfz4r1nyczv4-amp-linux-x64.drv
  /nix/store/apjz49n2hr1k0345k9c2z5w9hb7xli0n-amp-0.0.1786738049-g32e30e.drv