plasma-desktop install errors

vfclists@hp01:~$ sudo apt-get install plasma-desktop
[sudo] password for vfclists:
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:
 plasma-desktop : Depends: breeze but it is not going to be installed
                  Depends: kactivitymanagerd but it is not going to be installed
                  Depends: kde-cli-tools but it is not going to be installed
                  Depends: oxygen-sounds but it is not going to be installed
                  Depends: plasma-integration but it is not going to be installed
                  Depends: plasma-workspace but it is not going to be installed
                  Depends: polkit-kde-agent-1 but it is not going to be installed
                  Depends: libkworkspace5-5 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.