these 6 derivations will be built:
  /nix/store/arrcirnmlg6gr107lb7b7fcf296vjrjf-iets-0.1.0.drv
  /nix/store/b9lvm462vqv60q4s10lwskairs7figri-closure-info.drv
  /nix/store/wqzkg02d7jb9q4nbnp1z6awi8i0l8c9m-test-script.drv
  /nix/store/lq6nm358qx9c4s9ih61rhbm4csfv488y-driverConfiguration.json.drv
  /nix/store/wk4kzi4kjj6nvgpc6b65jms963sj63jf-nixos-test-driver-iets-cachetest.drv
  /nix/store/ycfhhllnpnqap4pn0g8hrk8bpryskf0w-container-test-run-iets-cachetest.drv