What is the best method to update only some binary packages

[Osamu Aoki <osamu@debian.org>]

Hi,

Suppose source foo_1.0.tar.gz produces:
 foo-updated_1.0_all.deb
 foo-static_1.0_all.deb

Then with next source foo_1.1.tar.gz with updated contents will produce
now with normal build script:
 foo-updated_1.1_all.deb  (updated from foo-updated_1.0_all.deb)
 foo-static_1.1_all.deb   (same as foo-static_1.0_all.deb)

Then What is the best way to make update archive to have:
 foo-updated_1.1_all.deb
 foo-static_1.0_all.deb

This way user will not be forced to download same package again.

Any suggestion for debian/rules ?  or pointer to good example.

Osamu