Issue when deploying to Vercel

[JClackett]

Have been debugging this thing where my remix apps were failing at runtime on vercel after a certain version of the vercel-cli.

Have finally tracked it down to this package seeming to cause the issues. I dont even have to be using this package in the remix.config.js, just having it in my package json causes the app to fail.

Here's a repro

If you remove remix-flat-routes it works again.

Here's an issue I filed with vercel

Any ideas what could be going on?

[JClackett]

Ive tried reverting back to previous versions of this package, but doesnt seem to make a difference so I assume its something to do with vercel and a conflict with some internal dependencies or something?

[kiliman]

Hmm. I don't use Vercel but this is the first I've heard of an issue. I'll create a project and see if I can figure out what is happening.