-# location based redirector gets it wrong with company VPN
-sed -i "s/deb.debian.org/ftp.de.debian.org/" /etc/apt/sources.list
+# location based redirector gets it wrong with company VPN; also add deb-src
+sed -i "s/deb.debian.org/ftp.de.debian.org/; /^deb\b/ { p; s/^deb/deb-src/ }" /etc/apt/sources.list