Version 5.2.1-1 of ppx-deriving is marked for autoremoval from testing on Thu 30 Jun 2022. It depends (transitively) on nvidia-graphics-drivers-tesla-470, affected by #1011146. You should try to prevent the removal by fixing these RC bugs.
Depends on packages which need a new maintainer
normal
The packages that ppx-deriving depends on which need a new maintainer are: