Hi, I noticed that apex and nis are currently testing despite the auto-remover wanting to remove them (#865585 and #862778). At the moment, they are (only) retained due to a constraint that ensures that d-i's packages are all present and installable.
Please have a look at these packages and let us know if this constraint is still relevant. Particularly, apex looks rather concerning with the bug (#865585) being filed in Jun 2017 with no maintainer follow up at all. Thanks, ~Niels