Sentinella Не удается установить на ubuntu 14.10 выше

Из Ubuntu 14.10 Sentinella нельзя установить на Ubuntu ни по программному центру, ни по терминалу. Терминал заканчивается ошибкой

appu@Ujjayini-Aspire-5738:~$ sudo apt-get install sentinella
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:
 sentinella : Depends: libprocessui4a (>= 4:4.6.1) but it is not installable
E: Unable to correct problems, you have held broken packages.

И когда я пытаюсь установить libprocessui4a, он говорит:

appu@Ujjayini-Aspire-5738:~$ sudo apt-get install libprocessui4a
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package libprocessui4a 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 'libprocessui4a' has no installation candidate

Как я могу это решить?