When using pnpm in monorepo, cannot find next-sever.js in the main lambda

[adamsh25]

Issue: Cannot find next-sever.js in the main lambda Remarks: Works OK for yarn monorepo Stack:

• Next@12.3.2
• Turbo@1.5.5
• pnpm@7.13.5
• sladg/nextjs-lambda@v3.20.3 Error: { "errorType": "Runtime.ImportModuleError", "errorMessage": "Error: Cannot find module 'next/dist/server/next-server'\nRequire stack:\n- /var/task/handler.js\n- /var/runtime/index.mjs", "stack": [ "Runtime.ImportModuleError: Error: Cannot find module 'next/dist/server/next-server'", "Require stack:", "- /var/task/handler.js", "- /var/runtime/index.mjs", " at _loadUserApp (file:///var/runtime/index.mjs:951:17)", " at async Object.UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:976:21)", " at async start (file:///var/runtime/index.mjs:1137:23)", " at async file:///var/runtime/index.mjs:1143:1" ] }

Followed guids: _Monorepos In case you are using monorepo, there are few more requirements. Firstly, you need to setup outputFileTracing in your next.config.js see: https://github.com/vercel/next.js/issues/36386#issuecomment-1137665939.

Secondly, you need to setup hoistingLimits: workspace. We need node_modules to actually contain all the dependencies in order for NextJS to pick them up for standalone build.

Tested with Turbo@1.5.5 and Yarn@3.2.4_

[adamsh25]

Seems like pnpm adds to the dependenciesLayer.zip the dependencies with the version and yarn does not do this. I started a project from scratch using turbo: https://turbo.build/repo/docs/getting-started/create-new pnpm next.out:

yarn next.out

[sladg]

Hey! So I took a look. The problem is with pnpm itself not being really supported by Next's standalone output.

https://github.com/vercel/next.js/discussions/38435 https://stackoverflow.com/questions/70895922/pnpm-linking-with-standalone-nextjs-build https://github.com/vercel/next.js/discussions/40482

Overall it seems like a lot of fiddling to get it to work with breaking changes happening every half a year, from what I found. I'm gonna do some more work on monorepos, but I don't plan to support pnpm specifically in the near future. Feel free to share your findings, might get back to it later!