versioned API through inheritance

v1_group_serializer.rb

module Export
  module V1
    class GroupSerializer < ActiveModel::Serializers

      attributes :items

      def items
        docs = object.items.order_by(:position.asc)
        ItemsSerializer.new(docs, special_options).serializable_hash
      end
    end
  end
end

v1_items_serializer.rb

module Export
  module V1
    class ItemsSerializer < ActiveModel::Serializer
      # ...
    end
  end
end

v2_groups_serializer.rb

module Export
  module V2
    class GroupSerializer < ::Export::V1::GroupSerializer
    end
  end
end

Export::V2::GroupSerializer#items works with Export::V1::ItemsSerializer in line 9 while I want it to work with the one from it's own namespace (Export::V2::ItemsSerializer) even though it uses the items method from V1. Is that even possible?