Override not setup properly (possibly due to mount/symlinks)

I ran `multirust override beta` in a directory and the beta was installed. Running `multirust list-overrides` showed the current directory (let's say `/foo`) as overriden. However, running `rustc --version` showed `rustc` was still the nightly version. I ran the override command again and this time `rustc --version` showed the proper version, but now `multirust list-overrides` shows two overrides, `/foo` and `/mnt/foo`. In my setup, `/foo` is a symlink to `/mnt/foo`.