layman -s sabayon

 * Fetching remote list,...
 * Remote list already up to date: http://www.gentoo.org/proj/en/overlays/repositories.xml
 * Last-modified: Wed, 02 Nov 2011 23:00:13 GMT
 * Fetch Ok

 * Syncing selected overlays,...
 *
 * Errors:
 * ------
 * Failed to select overlay "sabayon".
 * Error was: Exception: Overlay "sabayon" does not exist.
 *

 * CLI: Errors occured processing action sync
 *
 * Errors:
 * ------
 * Failed to select overlay "sabayon".
 * Error was: Exception: Overlay "sabayon" does not exist.
 *