these 2 derivations will be built:
  /nix/store/mhwkhy19cbzmvz0biyxyj44x8h0331xq-nix-grpc-store-0.2.3.drv
  /nix/store/mcgs15a5nd03wypxm39vpg16c4ih5hcd-nix-grpc-store-dispatcher.drv