post_install() {
    /usr/bin/glib-compile-schemas /usr/share/glib-2.0/schemas/
    instructions
}

post_upgrade() {
    /usr/bin/glib-compile-schemas /usr/share/glib-2.0/schemas/
    instructions
}

post_remove() {
    /usr/bin/glib-compile-schemas /usr/share/glib-2.0/schemas/
}

instructions() {
    echo "Restart GNOME Shell ([Alt]+[F2], r)."
}