post_upgrade() {
  cat <<MSG1
>>> Closed source drivers - like those from Nvidia - might not
    have an updated ABI version to match xorg-server.
    To prevent problems with these drivers create eg. file:

    /etc/X11/xorg.conf.d/15-ignore-abi.conf

    Section "ServerFlags"
        Option "IgnoreABI" "true"
    EndSection

MSG1
}

post_install() {
  post_upgrade
  cat <<MSG2

MSG2
}

