these 3 derivations will be built:
  /nix/store/jzmqn4kclg4xymll459jkrf4hrdagqwr-source.drv
  /nix/store/n3sia9rn3m7ywivq81d4agnsyisvd4bw-gno-2.9.1.drv
  /nix/store/np42vysfisbwbw9x218x48ay3xn49g2h-check-gno.drv