these 2 derivations will be built:
  /nix/store/109623hyhjrxiph2iyhy0rqlklgaz2lx-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/6r2cy2qm9mzi4lwvsbgk1rv5f9ppzxzn-nix-grpc-store-dispatcher.drv