Comment 1 for bug 90085

 > I't like to have a possibility to define temporary directory for
 > installing packages, at least for running install/rm scripts.

 > The best way for that imho would be an option to dpkg (--tmpdir ?).

I'm not sure what you want a temporary directory for, postinst scripts
can use tmpdir(1), or you might be looking for --root?

Please give us feedback so we can get an understanding of what you are
trying to accomplish.

- tfheen