these 2 derivations will be built:
  /nix/store/j3v672jbmqq0kzz72nf2zhxcdpicxp78-iets-0.1.0.drv
  /nix/store/wy6p8iplj5xyg3j7krdybykrmljhzyid-iets-diff-e2e.drv