diff --git a/src/documentation/sitemap.xmap b/src/documentation/sitemap.xmap
index c8d41de..61fb3ec 100644
--- a/src/documentation/sitemap.xmap
+++ b/src/documentation/sitemap.xmap
@@ -6,9 +6,10 @@
       <map:generate src="{project:content.xdocs}/{1}/resolver-{2}.xml"/>
       <!-- Wild assumption about the location of DocBook stylesheets.
            Edit to suit your system.
+      <map:transform src="file:///usr/share/sgml/docbook/xsl-stylesheets/xhtml/docbook.xsl"/>
+      <map:transform src="file:///opt/local/share/xsl/docbook-xsl/xhtml/docbook.xsl"/>
         -->
-      <map:transform
-          src="file:///usr/share/sgml/docbook/xsl-stylesheets/xhtml/docbook.xsl"/>
+      <map:transform src="file:///opt/local/share/xsl/docbook-xsl/xhtml/docbook.xsl"/>
       <map:serialize/>
     </map:match>
   </map:pipeline>