these 2 derivations will be built:
  /nix/store/ks6y92z7mnvhw0jnl9cqbqgwxzq308sp-nix-grpc-store-0.2.2.drv
  /nix/store/irrm1j61sj8h853lg6jg9mx1djcfknvs-nix-grpc-store-dispatcher.drv