```xml
<ruby-proxy-object>
    <ruby-object ruby-class="Jenkins::Plugin::Proxies::BuildWrapper" pluginid="rvm">
        <pluginid pluginid="rvm" ruby-class="String">rvm</pluginid>
        <object ruby-class="RvmWrapper" pluginid="rvm">
            <impl pluginid="rvm" ruby-class="String">ruby-1.9.2-p290</impl>
        </object>
    </ruby-object>
</ruby-proxy-object>
```

Looks strange, but that's what the rvm plugin produces...