How do I install udeb packages in Debian?

I want to try installing cdebconf-udeb in a Debian Buster Docker container, however apt search cdebconf-udeb turns up empty. How could I try to install this package if I really wanted to. ### Context I'm building a Docker image. One of my dependencies is tzdata which itself is dependent on debconf-2.0 (or debconf). Now debconf-2.0 can be provided by cdebconf, debconf, or cdebconf-udeb. Both cdebconf and debconf have a (recursive) depencency on perl-base. I want to minimize the size of my container and get rid of the Perl dependency. I thought I could try this by installing cdebconf-udeb, which doesn't have the Perl dependency and would still provide debconf-2.0. However, it seems I can't find the package in aptitude. I do know that cdebconf-udeb is intended for the use in building debian-installer images only, and is not intended for a normal Debian system. However I still wanted to try if I could use it to minimize my Docker image. Could I install cdebconf-udeb to minimize my Docker container? I'm aware of this similar question , however It was suggested to me in the comments to ask a new question.