these 6 derivations will be built:
  /nix/store/y4yss4yy4daxs1cpk6zw0pmla6y43s5z-iets-0.1.0.drv
  /nix/store/1ad2y8iaks4m6j8cq0za66w6avpqm7ql-closure-info.drv
  /nix/store/gvyqrb8m83jqqgqy9qg2lbwkchlb82ip-test-script.drv
  /nix/store/8vdzyma1pbq1mag2xxph8jhnph9rrwxy-driverConfiguration.json.drv
  /nix/store/fbjsi2vk3xgz2d41qnfq0y7nywb57d7y-nixos-test-driver-iets-cachetest.drv
  /nix/store/vsl9w143ar5qzdfvvk3yvfa327aqaj7w-container-test-run-iets-cachetest.drv