It seems like vercel has pegged bun to 1.3 and i think its causing my build to fail
The bun install phase is failing with this error message:
Failed to install 1 package
Error: Command “bun install” exited with 1
Does anyone know how to change the bun version back to 1.2.x? It seems like vercel isn’t letting me change it
Is anyone else seeing a similar issue?
Bun 1.3 introduces zero-config frontend development, unified SQL API, built-in Redis client, security enhancements, package catalogs, async stack traces, VS Code test integration, and Node.js compatibility improvements.
This has the instructions related to the new breaking changes in bun v1.3 (which Vercel did indeed recently ship)! Just tested myself - adding the bunfig.toml setting fixed our deployment. Couldn’t find a way to use an older version of bun unfortunately, but this should work for you
Hey, thanks for trying to help!
I tried your solution and i’m still seeing the same error
Did you do anything else besides add the bunfig.toml?
jacobparis
(Jacob Paris)
October 26, 2025, 1:23am
5
Hi @arahman4710 , it looks like your builds are succeeding now, do you still have issues with Bun or did you find a solution?