these 3 derivations will be built:
  /nix/store/p02clzn5pjdw2vzs8rs56crqnvhhyfx6-driverConfiguration.json.drv
  /nix/store/n8hc2sd7wxsx5ymqgiag9mh669xm7xf1-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/gchj9jsnkwn7ggsyck9hqln0rfyyfqhr-vm-test-run-nix-grpc-farm.drv