AUR Helper
An AUR helper is a tool that simplifies the process of procuring extra packages from the Arch User Repository.
yay
# Install base-devel packages, git and go
pacman -S base-devel git go
# Switch to any regular user
su sebin
# Make sure we're in the user's home directory
cd
# Create a new directory and change into it
mkdir git && cd git
# Clone the AUR package repo for yay
git clone https://aur.archlinux.org/yay.git
# Change into the newly cloned repository
cd yay
# Build the package and install it
makepkg -si