Paste the following into your /etc/pacman.conf, preferably near the top of it.
[lucifers-linux] SigLevel = PackageRequired Server = https://sourceforge.net/projects/luciferslinux/files/repository/$arch [lucifers-linux-any] SigLevel = PackageRequired Server = https://sourceforge.net/projects/luciferslinux/files/repository/any
Sync your package database so pacman is able to retrieve packages from there.
## In the case of an existing installation pacman -S <packagename> # or pacman -S lucifers-linux/<packagename>
If you are installing a new installation of Lucifer's Linux, please start by following the Arch Linux Install Guide. Once you have finished following the installation instructions, you can reboot into the new system and install further packages.