Hi Armin, with the catkin version shipped with Fuerte that use case is not possible. You have to install the workspace containing stack A using "make install". Groovy will be able to support that - as well as having multiple workspace overlaying each other. But I currently I can not yet recommend you to use the latest development version of catkin. - Dirk On 24.08.2012 05:54, Armin Hornung wrote: > Hi, > > does anyone know how to build on top of catkin stacks that are checked out and built from source? Say you have a catkin stack A (containing only messages), you build it in the "build" subdirectory and > you want to compile against it with a stack B? I had hoped to be able to do that by just sourcing the autogenerated setup.bash in "build" but it does not work (B still finds the system-installed > version of A). Essentially, this is the standard scenario of overlaying one package with a development version, as I want to start porting release code to groovy. Installing A globally on the system > is a workaround, but this should not be necessary as it potentially breaks other code which will start linking to wrong versions. Releasing the package A and then waiting for the build server to build > A, installing it and then working on B is also possible but very time-consuming especially if both A and B need to be worked on. > > > Cheers, >