my solution
{{range $name, $taxonomy := .Site.Taxonomies.tags}} {{ $cnt := .Count }}
{{ with $.Site.GetPage (printf "/tags/%s" $name) }}
<div class="tagbutton">
<a href={{ .RelPermalink }} title="All pages with tag <i>{{$name}}</i>">{{$name}}</a>
<sup>{{$cnt}}</sup>
</div>
{{end}}
{{end}}