I understand the usage of ROS_NOBUILD and ROS_BUILD_BLACKLIST and that they work on packages. But are there any plans to extend their usage to also work on stacks? Or better yet, to be able to place them at any location in the ROS_PACKAGE_PATH which will cause all directories underneath to be excluded? Thanks, -Ben Ben Axelrod Research Scientist iRobot Corporation 8 Crosby Drive, Mail Stop 8-1 Bedford, MA 01730 (781) 430-3315 (Tel) (781) 960-2628 (Fax) baxelrod@irobot.com