run_post_build_hooks

# File lib/rubygems/installer.rb, line 284
  def run_post_build_hooks # :nodoc:
    Gem.post_build_hooks.each do |hook|
      if hook.call(self) == false then
        FileUtils.rm_rf gem_dir

        location = " at #{$1}" if hook.inspect =~ /@(.*:\d+)/

        message = "post-build hook#{location} failed for #{spec.full_name}"
        raise Gem::InstallError, message
      end
    end
  end