these 6 derivations will be built:
  /nix/store/0ppysy37cvvm1x9wyvpq57p16p46rfwh-iets-0.1.0.drv
  /nix/store/222bwhy1j3q1f5hsf37b38wffs5hh8vd-closure-info.drv
  /nix/store/mjqqbganmy11vm9psd1kg7sgjqv2rf5l-test-script.drv
  /nix/store/x337596jh2hjnsyfnafcjmgjd3jfl76i-driverConfiguration.json.drv
  /nix/store/l3kr3pmmqj8k51786hy5ln3jkflqzx9n-nixos-test-driver-iets-cachetest.drv
  /nix/store/sq0m6s6isn0wxr1lhgx4bizgzzvnzvy5-container-test-run-iets-cachetest.drv