these 2 derivations will be built:
  /nix/store/r73918isih3awhn42w5xqm8qipjyrx8y-iets-deps-0.1.0.drv
  /nix/store/cbgyy51a2xk5fd0kq58dra42bccq62vp-iets-doc-0.1.0.drv