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