these 4 derivations will be built:
  /nix/store/x4xs2m6ndn1hqaqq47p9z4wka0q88a66-test-script.drv
  /nix/store/ncx7vj0xj1m0ip7lxnyr2lxvp3c604r9-driverConfiguration.json.drv
  /nix/store/zaqxcswm73m246cdxifikl5w7qi1wj2r-nixos-test-driver-iets-cachetest.drv
  /nix/store/0ss0zb1djriwiirwr4bsar20wxdkxjq3-container-test-run-iets-cachetest.drv