maven2: excluding directory from WAR

I tried this to exclude whole directory (${basedir}/src/main/webapp/webscripts) from my WAR file but it failed. What is wrong?

this doesn't work:

<configuration>
   <webResources>
      <resource>
       <directory>${basedir}/src/main/webapp/webscripts</directory>
       <excludes>
        <exclude>**/*.*</exclude>
       </excludes>
      </resource>
   </webResources>
</configuration>

this too:

<configuration>
   <webResources>
      <resource>
       <directory>${basedir}/src/main/webapp</directory>
       <excludes>
        <exclude>**/webscripts</exclude>
       </excludes>
      </resource>
   </webResources>
</configuration>

Can anybody help?