these 2 derivations will be built:
  /nix/store/dym3x3yfrc8cy8bnlycap0bqbqnhdqfz-iets-0.1.0.drv
  /nix/store/w9jhjciz44arrrvvyb9zj0218ylbx8p4-iets-diff-e2e.drv