these 6 derivations will be built:
  /nix/store/k66gnqg70z80wgbkf8q3hmmghq38c868-iets-0.1.0.drv
  /nix/store/dszab3j2bd1f8kcdbszjnf6q6q7f3g55-closure-info.drv
  /nix/store/yyhxbw6p543r62b0knkr1mpnygg5sz9a-test-script.drv
  /nix/store/64k33knzhlz14bfnyfb0y0av0fwifavq-driverConfiguration.json.drv
  /nix/store/6xwvmj3f7g8s3nbf887iash59yc99ypk-nixos-test-driver-iets-cachetest.drv
  /nix/store/7p4l189w16r66l0f5qjzn9l09d4j3rnp-container-test-run-iets-cachetest.drv