Redirects with prerendering

[draykefriesen]

We have a sveltekit site with prerendering enabled from our root +layout.server.ts file. We've imported a lot of content which contain links to routes on the old site and we're wondering how to handle these redirects.

We're deploying on vercel, and including a vercel.json file with redirects works with prerendering not enabled, but when we have it enabled our build breaks. When prerendering is enabled the build fails with Error: Not found: /about-us.

// vercel.json

"redirects": [
	{
		"source": "/about-us",
		"destination": "/about"
	}
]

Whats the recommended way to handle this so we can keep prerendering?