these 2 derivations will be built:
  /nix/store/fs8f1asxzl6rj8pz6bxqikjr29gx7h5c-flake-inputs.drv
  /nix/store/s10s8y9i0lp9v7hhqrc6zz4rd6bbdy6v-check-flake-inputs.drv