>>> Downloading 'http://icculus.org/alienarena/Files/alienarena-7.66-linux20130827.tar.gz' --2015-12-19 19:19:52-- http://icculus.org/alienarena/Files/alienarena-7.66-linux20130827.tar.gz Resolving icculus.org... 74.81.175.20, 2606:d700:8100::1337 Connecting to icculus.org|74.81.175.20|:80... connected. HTTP request sent, awaiting response... 404 Not Found 2015-12-19 19:19:52 ERROR 404: Not Found. !!! Couldn't download 'alienarena-7.66-linux20130827.tar.gz'. Aborting. * Fetch failed for 'games-fps/alienarena-20130827', Log file: * '/var/tmp/portage/games-fps/alienarena-20130827/temp/build.log' There aren't any linux-versions of alienarena-7.66-20130827 in the icculus.org's server, only a Windows version. The latest linux version is 20130207, please see https://icculus.org/alienarena/Files/
it's on the mirrors so you should just get it from there but I also added another url to the ebuild.
Thanks. It seems that not ALL of the mirrors have the sources, at least my default mirror trumpetti.atm.tut.fi was missing them.