How to enable non-standard Package Repositories

/docs/users/faq-howto-troubleshooting/howto-nonstandard-repo/

The active Package Repositories are defined in /etc/pacman.conf. However, unlike on Arch Linux, this section of the file is automatically maintained by UBOS.

To add a non-standard Repository, add a fragment file to /etc/pacman.d/repositories.d/ in a similar manner as the files already there.

In particular, to enable the toyapps Repository, edit /etc/pacman.d/repositories.d/toyapps and uncomment the commented-out lines there.

Then, re-run:

% sudo ubos-admin update

so UBOS will update /etc/pacman.conf.