I seem to be running out of space in /overlay
root@Pineapple:/usb# opkg update
Downloading http://cloud.wifipineapple.com/packages/Packages.gz.
Updated list of available packages in /var/opkg-lists/pineapple_packages.
root@Pineapple:/usb# opkg install reaver
Installing reaver (r113-1) to root...
Collected errors:
* verify_pkg_installable: Only have 172kb available on filesystem /overlay, pkg reaver needs 194
* opkg_install_cmd: Cannot install package reaver.
How can I free up some space?