I'm doing a lot of testing right now, and I'm finding myself annoyed at how the SHAREDLIB_BUILD and MODEL_BUILD steps happen every single time, even when I request multiple tests in the same call of run_sys_tests. Is there any way to make a test look in some pre-existing build directory for the shared library and the model? And/or to share a build directory among multiple tests spawned by the same run_sys_tests call? Even just the shared library would be good, as that's the thing that takes 5-10 minutes.