War without lib and classes maven 2.0.4

[Neeraj Bisht]

hi all
        i want the war file without lib and classes for this i write ant
task and merze in my pom
the ant task as follow
             <plugin>
    <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-antrun-plugin</artifactId>
       <executions>
         <execution>
           <phase>package</phase>
           <configuration>
             <tasks>

     <delete failonerror="false" includeemptydirs="true">
 <fileset dir="${project.build.dir}/${project.artifactId}/WEB-INF/classes">
 </fileset>
 <fileset dir="${project.build.dir}/${project.artifactId}/WEB-INF/lib">
 </fileset>
 </delete>


           </tasks>
           </configuration>
           <goals>
             <goal>run</goal>
           </goals>
         </execution>
       </executions>
     </plugin>

it is working but i am unable to define the phase ,i mean at which phase  i
will call this plugin run goal so that i will get the war without lib and
classes

if any one have alternative solution or know  right phase  is most welcome


Regards
Neeraj