Mountains out of NAnt hills

I have been working with NAnt for a while now...a couple of months, and I just discovered a cool new trick. (I say new, but its new to me : )

using the property::get-value() function, I was able to double expand a property.
Here's an example.

<property name="environment" value="test">
<property name="path.test" value="my test path here">
<property name="path.prod" value="my prod path here">

for the final party trick, I came up with:
<property name="path" value="property::get-value('path.' + property::get-value('environment'))"/>

and it will evaluate either the path.test or the path.prod based on the value of the environment property.