post_install ()
{
  echo "==> To enable autocomplete-ALL-the-things,"
  echo "==> add the following to your ~/.Xresources (or ~/.Xdefaults):"
  echo "==>   URxvt.perl-ext-common: [your previous plugins],autocomplete-ALL-the-things"
  echo "==>   URxvt.keysym.M-slash:  perl:aAtt:complete"
}

post_upgrade ()
{
  post_install $1
}