these 2 derivations will be built:
  /nix/store/020lnar9gm2gm3pphyscp3z0654hm0rw-nix-grpc-store-0.1.0.drv
  /nix/store/rpdw934kbadbx2sfhi39ppzpmpxsjn3f-nix-grpc-store-dispatcher.drv