Why not create symlink in deps dir with :path dependencies in Mix projects?
If you want to consult files in dependencies, you can access them by `deps/foo/...`, but in case of :path deps, you cannot do it simply.
Creating symlink is more intuitive for me than accessing :path deps directly. I think it is not intuitive that there is no dirs in deps/ if we add them as :path deps.
Perhaps it can also simplify the internal implementation because we don't have to switch :path deps and others when compilation.