these 3 derivations will be built:
  /nix/store/1bcrh5893khr3cy4rwb42l1h9291fvbc-iets-deps-0.1.0.drv
  /nix/store/xvcjfan9pg7d74iv01frkcd47im5sg90-iets-0.1.0.drv
  /nix/store/3nn3mc8326j36xzwa1qr5c5g383s8rq0-iets-partest.drv