Помогите найти отсутствующие зависимости mumble-сервера

Я пытаюсь установить пакет mumble-server, используя apt-get install mumble-server в Ubuntu 11.10 Server Edition в Rackspace Cloud.

Проблема в том, что он не может найти зависимости, которые должен был найти, потому что они существуют на launchpad.net?

Сообщение о зависимостях:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mumble-server : Depends: libavahi-compat-libdnssd1 (>= 0.6.16) but it is not     installable
             Depends: libprotobuf7 but it is not installable
             Depends: libqt4-dbus (>= 4:4.5.3) but it is not installable
             Depends: libqt4-network (>= 4:4.5.3) but it is not installable
             Depends: libqt4-sql (>= 4:4.5.3) but it is not installable
             Depends: libqt4-xml (>= 4:4.5.3) but it is not installable
             Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not installable
             Depends: libqt4-sql-sqlite but it is not installable
E: Unable to correct problems, you have held broken packages.

Любые идеи о том, что я могу пропустить источники ? Я гуглил вокруг и не нашел никого другого в этой ситуации или кого-либо еще, кто не мог бы установить вышеупомянутые пакеты. Спасибо за ваше время!

sources.list:

deb http://mirror.rackspace.com/ubuntu/ oneiric restricted
deb-src http://mirror.rackspace.com/ubuntu/ oneiric restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates restricted
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-updates restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirror.rackspace.com/ubuntu/ oneiric universe
deb-src http://mirror.rackspace.com/ubuntu/ oneiric universe
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates universe
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirror.rackspace.com/ubuntu/ oneiric multiverse
deb-src http://mirror.rackspace.com/ubuntu/ oneiric multiverse
deb http://mirror.rackspace.com/ubuntu/ oneiric-updates multiverse
deb-src http://mirror.rackspace.com/ubuntu/ oneiric-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the  release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://us.archive.ubuntu.com/ubuntu/ oneiric-backports restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ oneiric-backports restricted universe     multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository. This software is not part of Ubuntu, but is
## offered by Canonical and the respective vendors as a service to Ubuntu
## users.
# deb http://archive.canonical.com/ubuntu oneiric partner
# deb-src http://archive.canonical.com/ubuntu oneiric partner

deb http://security.ubuntu.com/ubuntu oneiric-security restricted
deb-src http://security.ubuntu.com/ubuntu oneiric-security restricted
deb http://security.ubuntu.com/ubuntu oneiric-security universe
deb-src http://security.ubuntu.com/ubuntu oneiric-security universe
deb http://security.ubuntu.com/ubuntu oneiric-security multiverse
deb-src http://security.ubuntu.com/ubuntu oneiric-security multiverse

# Cool Kid Webmin/Usermin Here Brah

deb http://download.webmin.com/download/repository sarge contrib
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib