these 2 derivations will be built:
  /nix/store/ynyjbdjbs8ppijc6kq9n02ni6hwj4bxr-nix-grpc-store-0.2.2.drv
  /nix/store/xw7wmfplhlbmhcvf285asgh1y17k0pnw-nix-grpc-store-dispatcher.drv