https://aur.archlinux.org/packages/iscan-plugin-gt-s650/
As root:
# pacman -S iscan iscan-data
As user:
$ git clone https://aur.archlinux.org/iscan-plugin-gt-s650.git
$ cd iscan-plugin-gt-s650
$ makepkg
As root:
# pacman -U iscan-plugin-gt-s650-1.1.0-1-x86_64.pkg.tar.xz
