Version 1.4.2-2 of ruby-msgpack 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.
Last update: 2022-05-26
Problems while searching for a new upstream version
uscan had problems while searching for a new upstream version:
redirecting DEPRECATED pkg-ruby-extras.alioth.debian.org/cgi-bin/gemwatch to gemwatch.debian.net