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() {
  /bin/cat << EOF
Don't forget to restart GNOME Shell ([Alt]+[F2], r) and to enable extension
with gnome-tweak-tool.
EOF
}