EDIT: Oh, I see - you install them as part of the Instinctiv package. In that case, the bug is that you're appending the required path to the LD_LIBRARY_PATH variable, not prepending it. EDIT2: That doesn't help either. It's using the versions from /usr/lib regardless. EDIT3: I was able to get it working by specifying all the libraries (with full path) in LD_PRELOAD