It is important for derivatives that the bootstrap cache is setup completely,
it is re-used in several places and thus cannot consist of the parent
distribution only.
Until there's a supportable way to bootstrap from multiple archives at the same time
(and multistrap doesn't work for that as discussed in the past), we're going to run
a lot of duplicated code here to massage the apt sources for the time being.
Daniel Baumann
Kiel Christofferson