these 2 derivations will be built:
  /nix/store/qvm9ykrpkiiwdxlq0138bc3mzn0bq0by-nix-grpc-store-0.2.2.drv
  /nix/store/hf4g9rv1w49j4gny5rg6fqkba31xvw9c-nix-grpc-store-dispatcher.drv