these 4 derivations will be built:
  /nix/store/457yghnjanz29h9aw1y4q644jr955bk7-test-script.drv
  /nix/store/jhfqay2k0kkszb3qhq5fih777qkn531q-driverConfiguration.json.drv
  /nix/store/kdbslfslbn5x7crrfqak09sfid9ri5gz-nixos-test-driver-iets-cachetest.drv
  /nix/store/zchn3vqrxywq4fmfskkfwr8wfplzj6sh-container-test-run-iets-cachetest.drv