error building with latest preact, next.js: Cannot find module 'webpack'

[srdjan]

Reproduction

https://github.com/srdjan/next-repros

Steps to reproduce

npm run build

Expected Behavior

successful build

Actual Behavior

Build error occurred
{ Error: Cannot find module 'webpack'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
at Function.Module._resolveFilename (/Users/srdjans/Code/next-repros/node_modules/module-alias/index.js:49:29)
at Function.Module._load (internal/modules/cjs/loader.js:562:25)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at Object. (/Users/srdjans/Code/next-repros/node_modules/@prefresh/webpack/src/index.js:1:17)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at Object. (/Users/srdjans/Code/next-repros/node_modules/@prefresh/next/src/index.js:1:18)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10) code: 'MODULE_NOT_FOUND' }

[marvinhagemeister]

Looks like the canary builds of nextjs inline webpack as a dependency. Therefore it won't show up in node_modules anymore.

Downgrading next to the latest stable build works fine.

@JoviDeCroock can you transfer this issue to the prefresh repo?

[srdjan]

yeah, thanks.
alternatively installing webpack (at least while this gets sorted) works ...

[marvinhagemeister]

Re-opening because it should work by default without additional user interactions.

[sventschui]

@JoviDeCroock do you already have a plan how to mitigate this in @prefresh/next? I think we should check whether the required webpack utils are part of nextjs' bundled webpack distro and use them instead of importing webpack (if available)

[JoviDeCroock]

Hmm, does next export the utils?

[jnv]

This seems to be fixed with the recently released next@10.0.8, can someone else verify?

[srdjan]

confirming that next@10.0.8 fixes this issue

[srdjan]

since I opened it - I'll close it :)

[jnv]

Cool, however mind that Next 10.0.8 has trouble with .env files: vercel/next.js#22879 – if you need that, it should be fixed in canary.