apt-cache policy libqtcore4
libqtcore4:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://se.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status