Amahi releases new versions of Greyhole (GH) after they've been tested. '''Official Greyhole for Amahi on Ubuntu 12.04.x:''' 0.9.22
=== Option 1 - Use the Greyhole APT repository (Ubuntu) '''ONLY''' ===
If you didn't already, add the Greyhole APT repository to your APT configuration.
sudo sh -c 'echo "deb http://www.greyhole.net/releases/deb stable main" > /etc/apt/sources.list.d/greyhole.list'