This ensures the `basePath` property works correctly when a multi-level value is defined (`/hello/world`) Fixes: https://github.com/vercel/next.js/issues/17889
Fixes https://github.com/vercel/next.js/issues/15639 Fixes https://github.com/vercel/next.js/issues/15820 To Do: - [x] Doesn't work with `basePath` yet