v3-beta Error: Cannot find module 'walk'

[johhansantana]

when I do next build && next export I get an error:

➜  with-dynamic-import git:(v3-beta) ✗ yarn build
yarn build v0.21.3
$ next build && next export 
> Using external babel configuration
> location: "/Users/jsantana/Downloads/next.js/examples/.babelrc"
module.js:472
    throw err;
    ^

Error: Cannot find module 'walk'
    at Function.Module._resolveFilename (module.js:470:15)
    at Function.Module._load (module.js:418:25)
    at Module.require (module.js:498:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/Users/jsantana/Downloads/next.js/examples/with-dynamic-import/node_modules/next/dist/server/export.js:39:13)
    at Module._compile (module.js:571:32)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:488:32)
    at tryModuleLoad (module.js:447:12)
    at Function.Module._load (module.js:439:3)
error Command failed with exit code 1.

[arunoda]

Thanks.
Try the latest beta. We just fixed it.

[johhansantana]

@arunoda the blog post with the example next.config.js has invalid syntax

exports.exportPathMap = () => {
  "/": { page: "/" },
  "/about": { page: "/about" },
  "/p/hello-nextjs": { page: "/post", query: { title: "hello-nextjs" } },
  "/p/learn-nextjs": { page: "/post", query: { title: "learn-nextjs" } },
  "/p/deploy-nextjs": { page: "/post", query: { title: "deploy-nextjs" } }
}

if I try to change it to

exports.exportPathMap = {
  "/": { page: "/" },
  "/about": { page: "/about" },
  "/p/hello-nextjs": { page: "/post", query: { title: "hello-nextjs" } },
  "/p/learn-nextjs": { page: "/post", query: { title: "learn-nextjs" } },
  "/p/deploy-nextjs": { page: "/post", query: { title: "deploy-nextjs" } }
}

The next export gives me error:

$ next export 
  Exporting to: /Users/jsantana/Downloads/next.js/examples/with-dynamic-import/out

  copying dynamic import chunks
> Could not found "exportPathMap" function inside "next.config.js"
> "next export" uses that function build html pages.
error Command failed with exit code 1.

[johhansantana]

fixed:

exports.exportPathMap = () => {
  return {
    "/": { page: "/" },
    "/about": { page: "/about" }
  }
}

[arunoda]

Thanks. Will fix it.

[wasim-ullah]

Is it fixed? I still can see the same issue.

[tianhuil]

@mrwullah, this issue has been fixed. You have to fill in next.config.js as per @johhansantana's latest comment and the error goes away.