these 2 derivations will be built:
  /nix/store/7rgl80437xl54hbffk2f09393nlj4jlw-iets-0.1.0.drv
  /nix/store/h0pz8vvvyp0f86ff9c3p6kz2k8bg2hn5-iets-diff-e2e.drv