these 4 derivations will be built:
  /nix/store/4k9mgs9zj8ffiziypqrdhnfpxilmj88y-test-script.drv
  /nix/store/yd0swys4n9s936ml1pf9jxsd4gq8kjb6-driverConfiguration.json.drv
  /nix/store/nwxh56xg3nyhimy6l59iqw82pmxkqgg1-nixos-test-driver-iets-cachetest.drv
  /nix/store/ng7rdls9dkxbfc0vpc3fmjc8lcw8733d-container-test-run-iets-cachetest.drv