these 2 derivations will be built:
  /nix/store/7zndl1rcj6xiwl2k06b8fmpq8rsavpgc-nix-grpc-store-0.1.0.drv
  /nix/store/g31k4acwz6qvj88v2sbcsqkw58v9kskz-nix-grpc-store-dispatcher.drv