these 6 derivations will be built:
  /nix/store/kgxf2k6pb8ilg0g9bv7jzq2bkw0kj2v5-iets-0.1.0.drv
  /nix/store/arpvvbkxpxywdscxzbkwb35021izf651-closure-info.drv
  /nix/store/x9jvpmv17mhq5n2p9m0g4iwhrx6p65zf-test-script.drv
  /nix/store/23qq9ik8v004vrijghawxnzh4yd7ajr5-driverConfiguration.json.drv
  /nix/store/9ja0gyh45p4pdw05iccbgiv8ihzp6v9d-nixos-test-driver-iets-cachetest.drv
  /nix/store/hd31v3z4g0rq2lv17jfb6nmdlil5gmmr-container-test-run-iets-cachetest.drv