Comment 4 for bug 208722

The problem here is most likely that there was no initial "apt-get update" run yet when the system got installed. The livecd does not have universe and multiverse enabled, so there is a window where the apt cron job has not updated yet.

The fix is either to have multiverse/universe available when the files are copied to the /target hd or to add code in apturl that tries to detect when a component is in the sources.list but it was not updated yet.