these 2 derivations will be built:
  /nix/store/1ywyg7kxmnxwq8gkrsqskasbdxkchzvp-nix-grpc-store-0.1.0.drv
  /nix/store/0rcrd1c5cprbpin76kdgj0k5c0wdxgxf-nix-grpc-store-dispatcher.drv