these 6 derivations will be built:
  /nix/store/x2njxnczyxdchpklhx3gnm1fwbxr9mbd-iets-0.1.0.drv
  /nix/store/c1hj7h2j34ghfb2xyld3zwf7zva98v62-closure-info.drv
  /nix/store/zdysmcacixvv4v2bd8nv8dmkk322q3h7-test-script.drv
  /nix/store/crhrrav94bj50qb2jp2d0z6ia26qm27n-driverConfiguration.json.drv
  /nix/store/y5nlav00gb8w5pw7djb19qrkyczh599y-nixos-test-driver-iets-cachetest.drv
  /nix/store/79vjk33qrwx10v76i5a5x6j8cbpi937x-container-test-run-iets-cachetest.drv