#download and put into /etc/portage/repos.conf/
[DEFAULT]
main-repo = gentoo

[grmpf-overlay]
location = /var/portage/repos/grmpf-overlay
sync-type = rsync
sync-uri = rsync://grmpf.net/grmpf-overlay
sync-rcu = false
sync-rsync-verify-metamanifest = no
auto-sync = yes