10:23:20:tribaal@matterhorn ~/Downloads$ apt-cache policy libmutter-1-0 
libmutter-1-0:
  Installed: 3.25.91+20170902~ce515c5-1ubuntu1
  Candidate: 3.25.91+20170902~ce515c5-1ubuntu1
  Version table:
 *** 3.25.91+20170902~ce515c5-1ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu artful/main amd64 Packages
        100 /var/lib/dpkg/status