Отсутствуют зависимости Python при установке Phablet-инструментов для предварительного просмотра в Ubuntu Touch.

Я нахожусь на Ubuntu 13.04, и я сталкиваюсь с подобной ситуацией и не знаю, как решить проблемы зависимостей. Кто-нибудь может помочь?

mk@MS7549:~$ sudo apt-get install phablet-tools
[sudo] password for mk: 
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:
 phablet-tools : Depends: python-configobj but it is not installable
                 Depends: python-launchpadlib but it is not installable
                 Depends: python-requests but it is not installable
E: Unable to correct problems, you have held broken packages.

Затем я попытался установить эти 3 пакета Python, но они НЕ доступны. Что мне теперь нужно делать?

mk@MS7549:~$ sudo apt-get install python-configobj
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-configobj is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python-configobj' has no installation candidate

mk@MS7549:~$ sudo apt-get install python-launchpadlib
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-launchpadlib is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python-launchpadlib' has no installation candidate

mk@MS7549:~$ sudo apt-get install python-requests
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-requests is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python-requests' has no installation candidate