these 4 derivations will be built:
  /nix/store/c9300yp1xfllvv4hkczb567fq44hypvc-iets-0.1.0.drv
  /nix/store/vkiqn7bq2hd5gbns6zrj8ngggf3ywdjz-iets-fuzz-diff-0.0.0.drv
  /nix/store/i6zqhmy6m2hz6blm9x25v3jsn00qjq7s-iets-conformance-adapter.drv
  /nix/store/x2n66i1w6zxwa5iama9381g957alfws5-nix-conformance-iets.drv