these 2 derivations will be built:
  /nix/store/gvj6kpcmsj2mv63fzix6c9q7cvrgizsj-nix-grpc-store-0.2.3.drv
  /nix/store/bpxha1qb2fil5l8c5qnw83qvpc2spq5p-nix-grpc-store-dispatcher.drv