these 4 derivations will be built:
  /nix/store/ksig2wb06k6ynj2ipd1qa4gcjfis16s1-test-script.drv
  /nix/store/70930zg115j0h21l4s75aydmkwac8y7c-driverConfiguration.json.drv
  /nix/store/5vjzdcyx735kdvzhyqwii1crlf4fqd45-nixos-test-driver-iets-cachetest.drv
  /nix/store/0mc5wdx1i6jy8s4qivxqbw5p5hg2f1rg-container-test-run-iets-cachetest.drv