# File lib/bundler/rubygems_integration.rb, line 296
    def backport_spec_file
      Gem::Specification.send(:define_method, :spec_dir) do
        @spec_dir ||= File.join base_dir, "specifications"
      end

      Gem::Specification.send(:define_method, :spec_file) do
        @spec_file ||= File.join spec_dir, "#{full_name}.gemspec"
      end
    end