post_install() {
    # cut off $pkgrel part
    pkgver="${1%-*}"

    # force _immediate_ creation of geoserver user
    systemd-sysusers /usr/lib/sysusers.d/signalk-server.conf

    # adjust permissions
    chown -R signalk:signalk /usr/lib/signalk-server
    chown -R signalk:signalk /etc/signalk-server
    chown -R signalk:signalk /var/lib/signalk-server

    # inform user about new systemd service
    cat <<EOF
==> Enable and/or start the \`signalk-server.service\` systemd service.
EOF

}

post_upgrade() {
    post_install $1
}