[Pharo-dev] CI server builds

Hi all, Currently I build my QCMagritte only for Pharo 2.0, loading version 3.0.9 of Seaside. I should probably extend this to build both for Seaside 3.1 and Pharo 3.0, but here I run into trouble. The version with Seaside 3.0.9 won't work on Pharo 3. So if I make this matrix, I will get one failing build. How can I solve this? I can abuse the symbolic versions of course, but as you can read in my sentence: I do not think this is a good solution. I want to be able to tell jenkins not to build the entire matrix. Is there an easy solution for this? Cheers, Diego