[gentoo-user] [catalyst question] how to emerge ~arch version pkgs build stage or iso files?

[yueqrgg]

here is what I've tried: 
1. /etc/catalyst/catalystrc : export ACCEPT_KEYWORDS='~amd64'
2. $HOME/releng/releases/portage/stages:
    1. touch make.conf && echo "ACCEPT_KEYWORDS='amd64'" >>  make.conf
    2. echo '~amd64' >> package.accept_kerwords/package.accept_kerwords

Haven't worked as desire.

I'v consider to write some thing relative in stage.spec files, but seems didn't 
find which keyword is relative to this.

so, what's the right way to do this?