root@mbox ~ apt-cache policy libplasma3
libplasma3:
  Installed: (none)
  Candidate: 4:4.14.6-4~ubuntu6
  Version table:
     4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 0
        100 /var/lib/dpkg/status
     4:4.14.6-4~ubuntu6 0
        500 http://au.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
root@mbox ~ i libplasma3
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:
 libplasma3 : Depends: libkcmutils4 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libkdecore5 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libkdeui5 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libkdewebkit5 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libkdnssd4 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libkio5 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libknewstuff3-4 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libsolid4 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
              Depends: libthreadweaver4 (= 4:4.14.6-4~ubuntu6) but 4:4.14.8-4~ubuntu1~ubuntu15.04~ppa1 is to be installed
E: Unable to correct problems, you have held broken packages.