# File lib/spring/test/application_generator.rb, line 116
      def build_and_install_gems
        manually_built_gems.each do |name|
          spec = Gem::Specification.find_by_name(name)

          FileUtils.cd(spec.gem_dir) do
            FileUtils.rm(Dir.glob("#{name}-*.gem"))
            system("gem build #{name}.gemspec 2>&1")
          end

          application.run! "gem install #{spec.gem_dir}/#{name}-*.gem --no-ri --no-rdoc", timeout: nil
        end
      end