basePath in custom-server-express only works in dev

[bernardop]

Hi all,

I'm having an issue where Links in a custom express server with the experimental basePath are only working in dev. When doing a production build, the basePath is not being pre-pended to the pages.

Here's a repo with a minimal setup to reproduce the issue.
https://github.com/bernardop/next-basepath-repro

Any help will be greatly appreciated!

[timneutkens]

basePath is a build-time setting not runtime so you have to put it in next.config.js.

[bernardop]

Yep! Thanks @timneutkens, after digging in the code I saw that basePath looks at process.env.__NEXT_ROUTER_BASEPATH, which is set at build time.