these 6 derivations will be built:
  /nix/store/7g07vkkhdf84zz13jxnlh2iq63bdyhl1-iets-0.1.0.drv
  /nix/store/vqs5xjrl7vdzih708a8i14hkriwxmx9p-closure-info.drv
  /nix/store/kmyg2hxa41zgij2060vd72f6b2jxmmy0-test-script.drv
  /nix/store/v1yswdvzaskmaa8vmpxkci8diwbgrxlv-driverConfiguration.json.drv
  /nix/store/8dpwpwrv1jf6y0x1dn1bfxmqng1qz2vd-nixos-test-driver-iets-cachetest.drv
  /nix/store/6ll3smww0xv3asbkizf99l94dyrgh1hq-container-test-run-iets-cachetest.drv