Open the following /etc/pacman.conf file and add it to the bottom line;

[onix]
SigLevel = Never
Server = http://repo.onix-project.com
Server = https://sourceforge.net/projects/onixos/files/Repo/

Then update the repositories;

$ sudo pacman -Syu

Package List

• airoscript-ng
• calamares-onix
• chrome-gnome-shell
• chrome-gnome-shell-git
• ckbcomp
• dxvk-bin
• etcher-bin
• fern-wifi-cracker
• flat-remix
• flat-remix-gnome
• flat-remix-gtk
• fortune-mod-hackers
• gigolo
• grub-customizer
• hashcat-utils-git
• hollywood
• loginized
• mkinitcpio-openswap
• ntfs-automount
• olang
• onix-base
• onix-edex-ui
• onix-graphics
• opencl-amd
• pwgen-passphrase
• q4wine-1.3.12-1
• rainbowcrack
• rtl88xxau-aircrack-dkms-git
• upd72020x-fw
• wd719x-firmware
• xkb-switch-git
• yay

And more will be added to the list as it is updated.