these 6 derivations will be built:
  /nix/store/ndgymdnbi9q1f1w83sxh47yxkwprvx30-iets-0.1.0.drv
  /nix/store/3jsw2r3d32wlp3cdwr29mxhvhamm9d97-closure-info.drv
  /nix/store/n2i0azv18m2l0676s3ip3282a8rzsp2n-test-script.drv
  /nix/store/7w14fdhh1ngrffjdwhbsmdngm28z278h-driverConfiguration.json.drv
  /nix/store/y0d1q10df8qqrigih9qbd58b6hqnpil3-nixos-test-driver-iets-cachetest.drv
  /nix/store/lb7d5zr8bz9xmwhfr5mfb52nk9hvxv5j-container-test-run-iets-cachetest.drv