Either
makepkg -si
or download prebuilt package from Github
curl -o cnq3-bin-1.51-1-any.pkg.tar -L https://github.com/jmatraszek/aur-cnq3-bin/releases/download/v1.50/cnq3-bin-1.50-1-any.pkg.tar
pacman -U cnq3-bin-1.51-1-any.pkg.tar
Private PKGBUILD to build Arch package with CNQ3
Either
makepkg -si
or download prebuilt package from Github
curl -o cnq3-bin-1.51-1-any.pkg.tar -L https://github.com/jmatraszek/aur-cnq3-bin/releases/download/v1.50/cnq3-bin-1.50-1-any.pkg.tar
pacman -U cnq3-bin-1.51-1-any.pkg.tar
Private PKGBUILD to build Arch package with CNQ3