PKGBUILDs/aur/chocolate-doom/chocolate-doom.install

post_install() {
    echo "Install IWADs into /usr/share/games/doom or /usr/local/share/games/doom"
    echo ""
    echo "Files such as doom2.wad, heretic.wad, hexen.wad, strife1.wad"
    echo "are IWADs appropriate for installation and usage with Chocolate"
    echo "engines.  These must be lower-case file names unless using a"
    echo "case-insensitive file system."
}