Our project uses a 3rd party SDK which is kept on the build agent. I store the path to this in a capability on the agent. So I have FLEX_4.5 as one capability and FLEX_4.6 as another capability. Currently I am passing these to ant in the task configuration. However, we have one branch that uses 4.5 and one branch that uses 4.6. How can I configure Bamboo so that I can do a branch build using the older SDK? I tried setting a plan variable based off the agent capability but that didn't work.