post_install() {
  getent group plugdev >/dev/null || groupadd -r plugdev

  echo -e "\e[31m********************************************"
  echo -e "\e[31m* To complete installation, please run:    *"
  echo -e "\e[31m* # sudo gpasswd -a <yourUsername> plugdev *"
  echo -e "\e[31m*                                          *"
  echo -e "\e[31m* Please note, that you have to have the   *"
  echo -e "\e[31m* kernel headers for your current kernel   *"
  echo -e "\e[31m* installed for dkms to work correctly!    *"
  echo -e "\e[31m********************************************"
  echo -e -n "\e[39m"
}