gnome-session-bin:
  Installed: 3.12.1-0ubuntu1~utopic2
  Candidate: 3.12.1-0ubuntu1~utopic2
  Version table:
 *** 3.12.1-0ubuntu1~utopic2 0
        500 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status
     3.9.90-0ubuntu16 0
        500 http://archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages