these 2 derivations will be built:
  /nix/store/lcr5r8iphs213gscgdk7fdndzl21l3z4-nix-grpc-store-0.2.3.drv
  /nix/store/6rwsyqrmmbn4b8chgbzy5a4iw0pzqajz-nix-grpc-store-dispatcher.drv