these 6 derivations will be built:
  /nix/store/9904hs7yma8h2fniyxr7dag1h0zdixdz-iets-0.1.0.drv
  /nix/store/k22g7l21cxdqx9d3a3cjkpp7yp60lskx-closure-info.drv
  /nix/store/kz2jn9q6y7vzwm26s7ji2ch2ign9icpc-test-script.drv
  /nix/store/ywbglfrvlnq6v1xmnx8mcv1v9923v9ba-driverConfiguration.json.drv
  /nix/store/aq3dfbbmggqmjgi47b9s7ia43735xlh1-nixos-test-driver-iets-cachetest.drv
  /nix/store/y5mz87fi8wzjbdp0gy8n06sn3lzqzfq0-container-test-run-iets-cachetest.drv