<configure
    xmlns:zcml="http://namespaces.zope.org/zcml"
    xmlns="http://namespaces.zope.org/zope">

    <configure zcml:condition="installed ftw.upgrade">
        <include package=".izug4" />
    </configure>

    <configure zcml:condition="installed ftw.upgrade">
        <include package=".opengever" />
    </configure>


</configure>
