migrating to ros: duplicate package names

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Hi all,

I'm trying to migrate our robotics team's existing software, which uses a custom qmake-based build system, to ROS, but I'm running into a problem where packages have the same name, but are in different stacks. For Instance, we have unrelated code in:

RobotA/Sensors/Vision
RobotB/Sensors/Vision

I've tried making RobotA and RobotB stacks, but then rospack find Vision only sees RobotB/Sensors/Vision. Is there a way to make the ROS build system and bash tools look inside a specific stack, or directory? I'd rather not have to redesign the entire repository. It makes sense that this would be possible... what if you wanted to integrate somebody else's stack, but they used a name that you also used?

Thanks!