these 3 derivations will be built:
  /nix/store/jxzp8j8cm1mgv3f6qz8ni2d5y22qn8pp-source.drv
  /nix/store/6w74admj9l5ixy8hmz47k24gqmiiwrw5-collie-1.28.4.drv
  /nix/store/8liq0n8gp97khm46h19rxnvq9zpvciqv-check-collie.drv