post_install() {

 if [ ! -f /var/lib/cfengine/ppkeys/localhost.priv ]; then
  cf-key > /dev/null
 fi 

 if ! [ -f /var/lib/cfengine/masterfiles/promises.cf ]; then
  cp -R /usr/share/CoreBase/* /var/lib/cfengine/masterfiles/
 fi

}