post_install() {
  systemctl stop key-mapper || true
  systemctl disable key-mapper || true

  systemctl enable input-remapper
  systemctl start input-remapper
}

post_upgrade() {
  if [ -d "/run/systemd/system/" ] && systemctl is-active --quiet key-mapper
  then
    systemctl stop key-mapper || true
    systemctl disable key-mapper || true
    systemctl restart input-remapper
  fi
}