sudo apt-get install plasma-discover -uV
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-discover : Depends: packagekit (>= 1.0)
                   Recommends: software-properties-kde but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
kde@kde-VirtualBox:~$ sudo apt-cache policy packagekit
packagekit:
  Installed: (none)
  Candidate: 0.8.17-4ubuntu6~gcc5.4ubuntu2
  Version table:
     0.8.17-4ubuntu6~gcc5.4ubuntu2 500
        500 http://gb.archive.ubuntu.com/ubuntu yakkety/main amd64 Packages