Conditional content in an include

desktop-base.html

{% block site_footer %}
  {% with new_links=True %}
    {% include 'includes/site-footer.html' %}
  {% endwith %}
{% endblock %}

site-footer.html

{% if new_links %}
  New links!
{% else %}
<div class="col col-2">
  <ul class="links-join">
    <li><a href="{{ url('mozorg.contact.contact-landing') }}" data-link-type="footer" data-link-name="Contact Us">{{ _('Contact Us') }}</a></li>
    <li class="wrap"><a href="{{ donate_url('footer') }}" class="donate" data-link-type="footer" data-link-name="Donate">{{ _('Donate') }}</a></li>
    <li class="clear"><a href="https://wiki.mozilla.org/Webdev/GetInvolved/mozilla.org" data-link-type="footer" data-link-name="Contribute to this site">{{ _('Contribute to this site') }}</a></li>
  </ul>
  <ul class="links-legal">
    <li><a href="{{ url('privacy') }}" data-link-type="footer" data-link-name="Privacy">{{ _('Privacy') }}</a></li>
    <li class="wrap"><a href="{{ url('privacy.notices.websites') }}#cookies" data-link-type="footer" data-link-name="Cookies">{{ _('Cookies') }}</a></li>
    <li class="wrap"><a href="{{ url('legal.index') }}" data-link-type="footer" data-link-name="Legal">{{ _('Legal') }}</a></li>
    <li class="clear"><a href="{{ url('legal.fraud-report') }}" data-link-type="footer" data-link-name="Report Trademark Abuse">{{ _('Report Trademark Abuse') }}</a></li>
  </ul>
</div>
{% endif %}