+# set up apt-cacher-ng
+/etc/init.d/apt-cacher-ng stop
+mkdir -p /scratch/apt-cacher-ng
+sed -i '/^CacheDir:/ s!^.*!CacheDir: /scratch/apt-cacher-ng!' /etc/apt-cacher-ng/zz_debconf.conf
+chown -R apt-cacher-ng:apt-cacher-ng /scratch/apt-cacher-ng
+/etc/init.d/apt-cacher-ng start
+