run.args.extra not working?

As reading this file C:\Program Files\NetBeans 8.1\harness\suite.xml there's app.conf file renamed and replaced like following:


Code:

<property name="app.conf" location="${harness.dir}/etc/app.conf"/>
<copy file="${app.conf}" tofile="${build.launcher.dir}/etc/${app.name}.conf">
     <filterchain>
           <replacestring from="$${branding.token}" to="${branding.token}"/>
     </filterchain>
</copy>




So I've modified C:\Program Files\NetBeans 8.1\harness\etc\app.conf as my requirement and re-built the installer.

Code:

default_options="--branding ${branding.token} -J-Xms128m -J-Xmx2048m"




But it depends on global harness. As mentioned here https://netbeans.org/projects/platform/lists/dev/archive/2006-12/message/41
how can I modify my build.xml to solve things with better approach?