these 2 derivations will be built:
  /nix/store/gq120k0hlmjxnb1ddmmd22rh2rjaxpa5-iets-0.1.0.drv
  /nix/store/18w9ydvakf3inpqaf7x9rlr673zc99w2-iets-diff-e2e.drv