Sebastian: I figured out how to add a repository in Adept.
I clicked on debian-updates main restricted then clicked "Clone" which made a copy of that repository then I double clicked the copy's line, which allowed me to edit the fields. I changed "main restricted" to "universe", then clicked "Apply". But sadly, it doesn't fix the problem. Now I have $apt-cache policy Package files: 100 /var/lib/dpkg/status release a=now 500 http://security.ubuntu.com edgy-security/universe Packages release v=6.10,o=Ubuntu,a=edgy-security,l=Ubuntu,c=universe origin security.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/multiverse Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=multiverse origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/universe Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=universe origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/restricted Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/main Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=main origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-updates/universe Packages release v=6.10,o=Ubuntu,a=edgy-updates,l=Ubuntu,c=universe origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-updates/restricted Packages release v=6.10,o=Ubuntu,a=edgy-updates,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-updates/main Packages release v=6.10,o=Ubuntu,a=edgy-updates,l=Ubuntu,c=main origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/universe Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=universe origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/restricted Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/main Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=main origin de.archive.ubuntu.com Pinned packages: -- [Edgy] Broken packages while trying to install libgtk2.0-dev https://launchpad.net/bugs/49220 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs