1.安装 layman
# emerge layman
# echo "source /var/lib/layman/make.conf" >> /etc/portage/make.conf
2.配置 overlay
# mkdir -p /var/lib/layman/local/{metadata,profiles}
# echo 'local' > /var/lib/layman/local/profiles/repo_name
# echo 'masters = gentoo' > /var/lib/layman/local/metadata/layout.conf
编辑 /var/lib/layman/make.conf加入/var/lib/layman/local使它看起来像这样：
PORTDIR_OVERLAY="
/var/lib/layman/local
$PORTDIR_OVERLAY
" 3.将ebuild加入overlay
# mkdir -p /var/lib/layman/local/games-util/steam
# cp steam-1.0.0.47.ebuild /var/lib/layman/local/games-util/steam/steam-1.0.0.47.ebuild
# pushd /var/lib/layman/local/games-util/steam
# repoman manifest
# popd