these 6 derivations will be built:
  /nix/store/2ncmz00d9nzff3kj00plmqwj7b005amg-iets-0.1.0.drv
  /nix/store/0f9mw7lgzz6bvvcz3dzbxxz7n7vl2vsi-closure-info.drv
  /nix/store/8bhscrs3gfnzdcmzr7xq1sgwji8b7ja0-test-script.drv
  /nix/store/z7sqjqkkjlc4ggn26s2jaz3asqisxnm8-driverConfiguration.json.drv
  /nix/store/171fn9pvgz086gc61mv1l24nbvxdyh06-nixos-test-driver-iets-cachetest.drv
  /nix/store/0l5bnjl7qqhlnmig11ipy41gch8jgs1h-container-test-run-iets-cachetest.drv