Bug#586428: Please clear the apt cache
> It looks it will need to be optional otherwise this is going to break
> Debian EDU.
> But I see your point in doing it twice :)
One setup that would not break Debian Edu is to clean the apt cache
once just after debootstrap, as bind-mounting the apt cache is only
done after debootstrap is done when building the LTSP chroot. The
reason is simply that as far as I know, there is no way to get
debootstrap to use an existing apt cache, so those packages are
downloaded every time. It is at the moment ~50 MiB of debs. The
remaining 3 GiB of packages are fetched from the apt cache,
And it can also be cleaned at the very end of the installation, after
the LTSP chroot is created between pkgsel and finish-install.