_feedbackd() {
    # Make sure the `feedbackd` group exists
    if ! getent group feedbackd >/dev/null; then
            groupadd --system feedbackd
    fi
    # Make sure the default user belongs to the `feedbackd` group so it can
    # trigger LED feedback
    MAIN_USER=`id -nu 1000`;
    if ! groups $MAIN_USER | grep -q feedbackd; then
        usermod -aG feedbackd $MAIN_USER
    fi
}

post_install() {
    _feedbackd
}    

post_upgrade() {
    _feedbackd
}
