<<< packages_pkgcheck_scan >>>
    DistutilsNonPEP517Build: version 23.0.0-r1: uses deprecated non-PEP517 build mode, please switch to DISTUTILS_USE_PEP517=...
<<< open bugs >>>
  https://bugs.gentoo.org/897764 dev-ada/langkit-23.0.0-r1_fails_tests:_printers.py:42:_error:_Item_&quot;None&quot;_of_&quot;Optional[List[SubPrettyPrinter]]&quot;_has_no_attribute_&quot;append&quot;_[union-attr]