groovyc taskdef showing error but builds fine

Doing an Ant build for java/groovy, I create a classpath ref:

<path id="classpath">
<fileset dir="$

" includes="*/.jar"/>
</path>

Adding a task for groovyc:

<taskdef name="groovyc" classpathref="classpath"
classname="org.codehaus.groovy.ant.Groovyc"/>

Eclipse does not like this, and shows as an error as it can't seem to parse lib.dir.

However it builds fine.