I am trying to install the lubuntu-desktop package.

user@host:~$ sudo apt-get install lubuntu-desktop

fails with this error:

The following packages have unmet dependencies.

lubuntu-desktop : Depends: gdebi but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

so I proceed with

user@host:~$ sudo apt-get install gdebi

leading to

The following packages have unmet dependencies.

gdebi : Depends: gdebi-core (= 0.9.5.3ubuntu2) but 0.9.5.3ubuntu1 is to be installed

Recommends: libgtk2-perl but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

So I go ahead and grab this libgtk2--perl package, and then try installing gdebi again, leading to:

user@host:~$ sudo apt-get install gdebi

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.

gdebi : Depends: gdebi-core (= 0.9.5.3ubuntu2) but 0.9.5.3ubuntu1 is to be installed    

E: Unable to correct problems, you have held broken packages.

What has gone wrong but mainly, how do I correct this??

EDIT: adding requested information

GDEBI

user@host:~$ sudo apt-cache policy gdebi

gdebi:

     Installed: (none)

     Candidate: 0.9.5.3ubuntu2

     Version table:

     0.9.5.3ubuntu2 0

               500 http://it.archive.ubuntu.com/ubuntu/ trusty-proposed/universe                          amd64 Packages

     0.9.5.3ubuntu1 0

               500 http://it.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages

     0.9.5.3 0

              500 http://it.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages

GDEBI-CORE

user@host:~$ sudo apt-cache policy gdebi-core

gdebi-core:

       Installed: 0.9.5.3ubuntu1

       Candidate: 0.9.5.3ubuntu1

       Version table:

       *** 0.9.5.3ubuntu1 0

            500 http://it.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages

            100 /var/lib/dpkg/status

       0.9.5.3 0

            500 http://it.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages