hmm... it seems the pathref was not working for some reason. Not sure why but this seems to work.

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@114595 13f79535-47bb-0310-9956-ffa450edef68

aspectwerkz/plugin.jelly

@@ -264,7 +264,7 @@
 
       <j:if test="${!empty(aspectwerkzcp)}">
         <ant:arg value="-cp"/>
-        <ant:arg pathref="aspectwerkzc.cp"/>
+        <ant:arg path="${aspectwerkzcp}"/>
       </j:if>
 
       <!-- If using the attribdef mode, weave classes generated by aspectc -->