Translations:Buildiso with AUR packages: Using buildpkg/35/en
From Manjaro
To keep track of available packages the pacman package manager uses database files which is downloaded and kept on your computer. You need to create such a database file for your repo. It is crucial that your database filename is the same as your repo name. If your repo is named online-repo then your database name must be online-repo.db.tar.gz.