This is my Portage overlay where I dump all of the packages I create or modify. If anything is out of date or doesn't build on your system, create a new issue and attach a copy of the build log from a pastebin.
The easiest way to add this overlay to your Portage tree is through layman.
# layman -o https://raw.githubusercontent.com/dynamotn/overlay/master/repositories.xml -f -a dynamo