Install Package Manager, AUR Helper and Enable multilib repository
Prerequisite
Update System
sudo pacman -Syu
Install required packages:
sudo pacman -S --needed base-devel git
Pacman/AUR front end
Octopi
sudo pacman -S octopi
AUR Helper
Paru
git clone https://aur.archlinux.org/paru.git
cd paru
makepkg -si
Yay
git clone https://aur.archlinux.org/yay.git
cd yay
makepkg -si
Enable chaotic-aur
Follow this link.
Enable multilib repository
Edit pacman.conf:
sudo nano /etc/pacman.conf
Uncomment the following lines by removing the # character at the beginning of the line:
[multilib]
Include = /etc/pacman.d/mirrorlist
Update the system package database:
sudo pacman -Syy