Simple. We want to put into Debian all needed perl modules needed to run Catalyst and keep them up to date.
Check Your local mirror of debian packages.
Example for unstable:
deb http://ftp.se.debian.org/debian/ unstable main non-free contrib
Example for testing:
deb http://ftp.se.debian.org/debian/ testing main non-free contrib
Look for libcatalyst-perl and libcatalyst-modules-perl packages
Some of packages are available in backport.org service. We want to see all our packages there - so stay tune!
Usually you just need to put line in /etc/apt/sources.list
deb http://www.backports.org/debian/ sarge-backports main
but You should read http://www.backports.org/instructions.html if You want to use backported packages.