these 6 derivations will be built:
  /nix/store/5vq6435vkjx3qxw7k4ys00zaagxggghn-iets-0.1.0.drv
  /nix/store/crr16y56jmxcxcfm224nh3j0rrj6mnak-closure-info.drv
  /nix/store/irja7q4l8svsbm7aqqj5379cr1pc7ax6-test-script.drv
  /nix/store/502jid9vwymfnd2213mxfr7gxjz6n94w-driverConfiguration.json.drv
  /nix/store/p9xxbdbwf826ggy4zx30rwhylngp41rv-nixos-test-driver-iets-cachetest.drv
  /nix/store/cq7aqrbv1584vvh7wps64q0prkrf56r5-container-test-run-iets-cachetest.drv