APT/dpkg system within a system

[Joshua Judson Rosen]

Benjamin Scott <dragonhawk at gmail.com> writes:
>
> On Wed, Jan 26, 2011 at 10:11 AM, Benjamin Scott <dragonhawk at gmail.com> wrote:
> > apt-get -c /usr/unstable/etc/apt/apt.conf update
> 
>   WARNING!
> 
>   Be warned that it would appear APT does not pass it's root directory
> setting on to dpkg.  Attempting to run an install with the above will
> cause APT to use package sources and dependency information from
> /usr/unstable/, but then invoke dpkg with the config normally used for
> the system.
> 
>   As a result, my system is now running some extremely borken
> combination of packages from lenny and sid.  I see a reinstall in my
> near future.

Depending on how many packages you pulled in from sid, you may
actually be able to just downgrade them by specifying, e.g.:

    apt-get install $pkgname/lenny

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