A signed-optional pacman repository (rolling; newest build wins). Add it to /etc/pacman.conf:
[tab-atelier] SigLevel = Optional TrustAll Server = https://deb.tab-atelier.wdes.eu/arch
Then install (the two packages conflict — pick one):
sudo pacman -Sy tab-atelier # desktop GUI sudo pacman -Sy tab-atelier-headless # display-less daemon
PKGBUILD lives in packaging/arch/.