these 2 derivations will be built:
  /nix/store/4kw6gkdb5kysvagb6jm6f66vw0c184hw-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/mh6xnrxlqw2m0jkhspf9pvfi4svc6lch-nix-grpc-store-dispatcher.drv