xen-utils-4.0:
  Installed: 4.0.1~rc6-1
  Candidate: 4.0.1~rc6-1
  Version table:
 *** 4.0.1~rc6-1 0
        500 http://mirror.csclub.uwaterloo.ca squeeze/main Packages
        100 /var/lib/dpkg/status

xen-hypervisor-4.0:
  Installed: (none)
  Candidate: (none)
  Version table:

linux-image-xen-amd64:
  Installed: (none)
  Candidate: 2.6.32+28
  Version table:
     2.6.32+28 0
        500 http://mirror.csclub.uwaterloo.ca squeeze/main Packages

xen-linux-system-2.6.32-5-xen-amd64:
  Installed: 2.6.32-21+xen0
  Candidate: 2.6.32-21+xen0
  Version table:
 *** 2.6.32-21+xen0 0
        500 file: debs/ Packages
        100 /var/lib/dpkg/status
     2.6.32-20 0
        500 http://mirror.csclub.uwaterloo.ca squeeze/main Packages