Hi there! For my dynamic sitemap (/app/sitemap.ts), I use fs.readdirSync to dynamically get all of the route files and generate all sitemap entries. This works perfectly fine on build. I never want this to run in runtime. So I added
export const dynamic = 'force-static'
And for production env, this works fine. It never gets revalidated again, until I hit another build.

The issue is: For preview, it sometimes starts a revalidation (see attached screenshot of the logs), which then always fails with Error: ENOENT: no such file or directory, scandir '/var/task/app' (which is okay, since I know that in runtime the files are not accessible anymore).

Is there a way to get Vercel to never revalidate the sitemap on Preview? I just want to avoid all the error log noise. Or do I have to re-implement my function to be a prebuild script that stores a sitemap.xml into the /public folder during build?

Thanks in advance!