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