> but how would this work for a patch set of a specific old release .deb > where the .deb is only available on snapshot.debian.org > <http://snapshot.debian.org>? > > I guess i have to then load the specific source package form snapshot > manually? Isn't it possible to add a specific snapshot as deb-src to your sources.list? Something like this should work: deb-src https://snapshot.debian.org/archive/debian/<dateandtime>/ sid main