--backportrepos Enable Debian's backports repository (backports.debian.org).
--keep_src_list Do not overwrite user provided apt sources.list.
--contrib Enable 'contrib' in COMPONENTS (defaults to 'main' only).
--backportrepos Enable Debian's backports repository (backports.debian.org).
--keep_src_list Do not overwrite user provided apt sources.list.
--contrib Enable 'contrib' in COMPONENTS (defaults to 'main' only).