Originally posted by Chris Reeves:
Your other option here is to just fail the build if the property hasn't been set. Then you develpers will be forced to go in and set the property. It's not a great solution if you really want to change that parameter on the fly, but it would work.
I'm not sure what this parameter will be used for, so I don't know what other solutions to offer.
By the way, my comments here are my own initiative and were not requested by Jacob.