I've got two projects, one is a rails app another is a ruby library (not a gem, just a library). The rails app uses the library, which if it's installed, works fine. But as I'd prefer to point the rails app at the library under development, I'd like to add that in the path in RubyMine. I've tried adding it to Project Settings > Project Structure -> Load Path , but Rails still doesn't see it, and printing out $LOAD_PATH in the rails console doesn't show the paths. This is on Windows btw (yet another reason I'd as soon not install the library). What am I missing? Thanks!