these 3 derivations will be built:
  /nix/store/mn9pqa0c6bqbx886kzb0jkgjh40chcf0-source.drv
  /nix/store/dlhc03girh2jvilvf457dbpk45d45qdq-gno-2.8.5.drv
  /nix/store/j9dvnh0jbhh5x8g1lyxvsz0bqv9is34w-check-gno.drv