these 6 derivations will be built:
  /nix/store/j91lqkimnq0dfchy07xi4whpn2imqzcb-iets-0.1.0.drv
  /nix/store/qcif5pvamzm4sv6q9sn1njwl0fpm3lk2-closure-info.drv
  /nix/store/ky6fp4lf37906xw9q5k5h80fxbbfnh3y-test-script.drv
  /nix/store/9h9nafy89wcr9y202dflydlbzdds8l5v-driverConfiguration.json.drv
  /nix/store/jdxkwcnaaiw3phpl4b5dqgyrmrmk9skw-nixos-test-driver-iets-cachetest.drv
  /nix/store/vfvacds30j0xxpgs3hgc4ch7qnm6b0xq-container-test-run-iets-cachetest.drv