deb-src http://ftp.de.debian.org./debian trixie main contrib non-free deb-src http://ftp.de.debian.org./debian trixie-updates main contrib non-free deb-src http://ftp.de.debian.org./debian trixie-proposed-updates main contrib non-free deb-src http://security.debian.org./debian-security trixie-security main contrib non-free deb-src http://ftp.de.debian.org./debian trixie-backports main contrib non-free