these 6 derivations will be built:
  /nix/store/kyylp87pd460lj73ffd78p6qh6fay428-iets-0.1.0.drv
  /nix/store/siy6n9yplwx5wnxvprz7l4pyr12hiscm-closure-info.drv
  /nix/store/1ds3qbk5fphg4617780cijv44g2axg3d-test-script.drv
  /nix/store/p95jqysa7yz69nm8jnhzd4a14lvak0wr-driverConfiguration.json.drv
  /nix/store/h9124i383s8jdl27h7alpxji4s07vipb-nixos-test-driver-iets-cachetest.drv
  /nix/store/7r5fgrj60ri5rakl0l366kkxmbcmx0jn-container-test-run-iets-cachetest.drv