protected function getHead() {
    $monospaced = PhabricatorEnv::getEnvConfig('style.monospace');
    $monospaced_win = PhabricatorEnv::getEnvConfig('style.monospace.windows');

    $request = $this->getRequest();
    if ($request) {
      $user = $request->getUser();
      if ($user) {
        $pref = $user->loadPreferences()->getPreference(
            PhabricatorUserPreferences::PREFERENCE_MONOSPACED);
        $monospaced = nonempty($pref, $monospaced);
        $monospaced_win = nonempty($pref, $monospaced_win);
      }
    }

    $response = CelerityAPI::getStaticResourceResponse();

    return hsprintf(
      '%s<style type="text/css">'.
      '.PhabricatorMonospaced, '.
      '.phabricator-remarkup .remarkup-code-block '.
        '.remarkup-code { font: %s; } '.
      '.platform-windows .PhabricatorMonospaced, '.
      '.platform-windows .phabricator-remarkup '.
        '.remarkup-code-block .remarkup-code { font: %s; }'.
      '</style>%s'.
	  '<!-- Piwik -->'.
	  '<script type="text/javascript">'.
	  'var _paq = _paq || [];'.
	  '_paq.push([\'trackPageView\']);'.
	  '_paq.push([\'enableLinkTracking\']);'.
	  '(function() {'.
      'var u="//piwik-URL";'.
      '_paq.push([\'setTrackerUrl\', u+\'piwik.php\']);'.
      '_paq.push([\'setSiteId\', YOURSITEID]);'.
      'var d=document, g=d.createElement(\'script\'), s=d.getElementsByTagName(\'script\')[0];'.
      'g.type=\'text/javascript\'; g.async=true; g.defer=true; g.src=u+\'piwik.js\'; s.parentNode.insertBefore(g,s);'.
      '})();'.
	  '</script>'.
	  '<noscript><p><img src="//piwik-URL" style="border:0;" alt="" /></p></noscript>'.
	  '<!-- End Piwik Code -->',
      parent::getHead(),
      phutil_safe_html($monospaced),
      phutil_safe_html($monospaced_win),
      $response->renderSingleResource('javelin-magical-init', 'phabricator'));
  }