Could/should you set Dir::Cache::{pkgcache, srcpkgcache} = ""; if all you are doing is locally downloading dependencies of an installation package?

[Albretch Mueller <lbrtchx@gmail.com>]

 I also notice repeated copies of {src-, pkgcache}.bin files for each
downloaded package even though I am downloading them to specific
subdirectories in order to then install them using dpkg.
 Do you really need those binaries and cache instructions if you are
just downloading the installation dependencies? How do you remove,
disregard those kinds of caching strategies in a graceful way?
 lbrtchx