these 2 derivations will be built:
  /nix/store/7aqay4yi1axhzy71ni0nig750r1wdn0z-nix-grpc-store-0.2.2.drv
  /nix/store/f5rnwgmv7228bxpnw4qjd02j19pqxz13-nix-grpc-store-dispatcher.drv