POSTIN

/bin/sh

if [ $1 -gt 1 ]; then
  if [ -r /etc/X11/XF86Config-4 ] && grep -q 'Option.*"XkbOptions".*grp:' /etc/X11/XF86Config-4; then
    perl -pi -e 's/^(\s*Option\s*"XkbLayout"\s*)"([^,]*)"/$1"us,$2"/' /etc/X11/XF86Config-4
  fi
fi
if [ -r /etc/X11/XF86Config-4 ] && [ ! -e /etc/X11/xorg.conf ]; then
  ln -s XF86Config-4 /etc/X11/xorg.conf
fi

perl -pi -e 's/^(\s*Driver\s*)"Keyboard"/$1"kbd"/' /etc/X11/xorg.conf

Triggers

XFree86-server

/bin/sh

rm -f /etc/X11/X
ln -s ../../usr/X11R6/bin/Xorg /etc/X11/X