[news.eclipse.tools.buckminster] How to ensure the exact same target pla

["Tas Frangoullides" <tfrangoullides@xxxxxxxxxxxxxxxxxx>]

I am materializing a target platform by using a feature which includes the 
features I want in my target platform. For example here is my feature

<feature
     id="com.mialos.tutorial.mailapp.targetplatform"
     label="Targetplatform"
     version="1.0.0.qualifier"
     provider-name="ME">
  <includes
        id="org.eclipse.equinox.executable"
        version="3.3.200"/>
  <includes
        id="org.eclipse.rcp"
        version="3.5"/>
</feature>

Materialization works fine when the versions in the target feature are 
available. I tried changing the rcp version to 3.6 and it failed as I 
expected. However, when I tried changing it to 3.4 it still worked and 
materialzed 3.5 instead. I can see how this might be desirable in some 
applications but I really need the versions to be exact in this case. How do 
I achieve it?

Thanks,
Tas