Vercel Bun runtime is still using Bun 1.3.12 — is there a way to use Bun 1.3.14?

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1

Hi Vercel team,

I am using the Bun runtime for a Vercel Function and I need to use the recently introduced Bun.Image API.

The same code works correctly in my local environment, but it fails in production with this error:

TypeError: undefined is not a constructor

at ev1 (/var/task/apps/server/dist/bundle.js:1325:153865)

The failure happens when the application attempts to instantiate Bun.Image.

I added runtime diagnostics inside the deployed Vercel Function and received the following result:

{
  "bunVersion": "1.3.12",
  "bunRevision": "700fc117a2fd01ac0201deaa6fa69c5557acb04f",
  "hasBunImage": "undefined",
  "runtime": "bun"
}

This confirms that the production Function is currently running Bun 1.3.12, where Bun.Image is not available.

My questions are:

  1. Is there currently any way to pin or request Bun 1.3.14 or a newer version for a Vercel Function?
  2. Will Bun.Image be supported in the Vercel Bun runtime once the runtime is updated, or could it be excluded from Vercel’s Bun build?
  3. Is there any recommended temporary solution that does not require adding sharp and its native binaries?

Thank you.

2

I found a solution , it’s a little bit tricky but works : GitHub - FlavioScimeca/vyrel: ==WIP== TypeScript monorepo using Bun for building multi-platform products with shared authentication, organizations, and a GraphQL API. One codebase powers web, mobile, and browser extension clients end to end. Publishes @vyrel/morph and @vyrel/graphql-client to npm for schema bridging and type-safe optimistic GraphQL cache updates on the client. · GitHub