these 2 derivations will be built:
  /nix/store/6ap447kv2ad27687j6laxmarv3c4i81x-nix-grpc-store-0.2.3.drv
  /nix/store/wz00qfkjh5pf3n84g1yww39ywa1ls3zi-nix-grpc-store-dispatcher.drv