Even split between Java / C++, with at least 4 different build systems: 2 of which are effectively the next generation of the other 2. 2 different UNIX shells and 5 other dynamic programming languages. Not the end of the world, and there are probably good reasons for a lot of it (maybe there are bindings for various languages, maybe some of it is misindeitified, maybe they're harnessing 2 large bodies of existing work, 1 in Java and 1 in C++), but it may suggest a lot of people just doing things their own way trying to carve out their own niche, without a cohesive philosophy across the system, which mirrors my experience with Yahoo's engineering org.