these 6 derivations will be built:
  /nix/store/y4yss4yy4daxs1cpk6zw0pmla6y43s5z-iets-0.1.0.drv
  /nix/store/la40cb83c5a0qkdclzln1zzijrixs2r1-closure-info.drv
  /nix/store/qmpjv09950i953qi6n0rcqmxk95llwzb-test-script.drv
  /nix/store/6yrbr6jz6q3cl7wq7iwxm8ahvxsh5p2q-driverConfiguration.json.drv
  /nix/store/r9aviwifv29y43k6bccyjbq8wscific7-nixos-test-driver-iets-cachetest.drv
  /nix/store/a1jy6mv365zvl9wjcw2rld33fpv9ysbd-container-test-run-iets-cachetest.drv