these 4 derivations will be built:
  /nix/store/pnf2ppxi4hdfknvjhs40gmxhkmmmvbhp-test-script.drv
  /nix/store/ncn3qbhymz76zyqw0m1ir47c34m3rphk-driverConfiguration.json.drv
  /nix/store/hzzgbsyrzwgc3rgblbhdapaf4igycd2r-nixos-test-driver-iets-cachetest.drv
  /nix/store/qxxnlrjz3l4rh52hxagxdp6cyj51v79r-container-test-run-iets-cachetest.drv