Coloque isso no seu " / etc / apt / preferences ":
Package: *
Pin: release a=stable
Pin-Priority: 900
Package: *
Pin: release o=Debian
Pin-Priority: -10
Isso é de man apt_preferences
, em que P
significa Pin-Priority
:
500 < P <=990
causes a version to be installed unless there is a version available belonging to the target release or the installed version is more recent
P < 0
prevents the version from being installed
Veja esta página wiki do Debian para algo mais gentil do que a página do manual.