Remove non-us from sources.list
From MEPIS Documentation Wiki
!!! Warning! The info contained in this article pertains to older versions of MEPIS !!!
For the sarge release, packages that were formerly in the non-US part of the archive have been moved into the regular archive. If you have any lines referring to "non-us" in your /etc/apt/sources.list, you should remove them.
- Run kwrite as root, open /etc/apt/sources.list file, alternatively you can go in Synaptic -> Settings -> Repositories.
- Remove "non-us" lines.