these 6 derivations will be built:
  /nix/store/6yqq932p53462yxcib0pl3sq929v3pjr-iets-0.1.0.drv
  /nix/store/b8lqrdrp7211nfyi45ai0x55yi2n6bs9-closure-info.drv
  /nix/store/yavsbmhrgh569d4qdayrxrp9sflww01h-test-script.drv
  /nix/store/3y3di7s7cfg5cyvz9ygi2xn1pi47m4id-driverConfiguration.json.drv
  /nix/store/6pwqyrnqx8mbc5d8f4xpaqlp630hls47-nixos-test-driver-iets-cachetest.drv
  /nix/store/4m74ilrq7nh2yashqahk8zkgdl7xw2kx-container-test-run-iets-cachetest.drv