post_install() {
  echo ">> To enable BBDB add this to your .emacs:"
  echo ">>    (require 'bbdb)"
  echo ">>    (bbdb-initialize)"
}

post_upgrade() {
  post_install $1
  echo ">> Update breaks wanderlust compatibility. You need to keep bbdb-2 or intergrate them manually"
  echo ">> gnus compatibility was also broken. Now initialization should be:"
  echo ">> (require 'bbdb-loaddefs)"
  echo ">> (require 'bbdb)"
  echo ">> (bbdb-initialize 'gnus 'message)"
  echo ">> (bbdb-mua-auto-update-init 'gnus 'message)"
}