these 2 derivations will be built:
  /nix/store/g29lq8q2kxg9mj07kywqcldmvzla8bpc-nix-grpc-store-0.2.3.drv
  /nix/store/4nfs7gmvndjjwancs5xygzbw0kavs7ca-nix-grpc-store-dispatcher.drv