local OLD_SPELL_VERSION=""
if spell_ok $SPELL; then
  OLD_SPELL_VERSION="$(installed_version $SPELL)"
  if [[ ${OLD_SPELL_VERSION:0:3} != ${VERSION:0:3} ]] &&
     [[ ${VERSION:0:3} == 1.2 ||
        ${VERSION:0:3} == 1.3 ||
        ${VERSION:0:3} == 1.4    ]]
  then
    message "This is a possibly incompatible update of $SPELL..."
    message "Figuring out what spells need to be recast, this may take a while."
    for each in $(show_up_depends $SPELL); do
      if [[ $each != $SPELL ]]; then
        if gaze install $each | xargs readelf -d 2> /dev/null |
           grep -q "NEEDED.*libxcb.*.so"; then
             up_trigger $each cast_self
        fi
      fi
    done
  fi
fi

