post_install() {
  [ -x usr/bin/install-info ] && install-info /usr/share/info/numdiff.info.gz /usr/share/info/dir 2> /dev/null
}

post_upgrade() {
  post_install $1
}

pre_remove() {
  [ -x usr/bin/install-info ] && install-info --delete /usr/share/info/numdiff.info.gz /usr/share/info/dir 2> /dev/null
}