>>> Downloading 'http://download.filesystems.org/unionfs/unionfs-2.1/unionfs-2.1.6_for_2.6.23-rc8.diff.gz'
--15:53:56--  http://download.filesystems.org/unionfs/unionfs-2.1/unionfs-2.1.6_for_2.6.23-rc8.diff.gz
           => `/usr/portage/distfiles/unionfs-2.1.6_for_2.6.23-rc8.diff.gz'
Resolving download.filesystems.org... 130.245.126.1
Connecting to download.filesystems.org|130.245.126.1|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
15:53:57 ERROR 404: Not Found.

!!! Couldn't download 'unionfs-2.1.6_for_2.6.23-rc8.diff.gz'. Aborting.
 * Fetch failed for 'sys-kernel/sabayon-sources-2.6.23-r1'
!!! can't process invalid log file: merge.ERROR