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I'm using the latest version Nextjs. The project is running fine when testing and running in developer mode. When I try a production build npx next build --debug I get the error below. The output doesn't tell me much about what the problem is. Any ideas how to get the verbose information from this error?

HookWebpackError: Expected an opening square bracket.

Build error occurred Error: > Build failed because of webpack errors at /Users/xxx/projects/nextjs/my-next-website/node_modules/next/dist/build/index.js:17:924 at async Span.traceAsyncFn (/Users/xxx/projects/nextjs/my-next-website/node_modules/next/dist/telemetry/trace/trace.js:6:584)

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  • Could you add the whole trace? Commented May 25, 2021 at 18:03
  • Hi Simon, that is the whole trace? Commented May 26, 2021 at 1:13
  • Unless there is some way to log more information? Commented May 26, 2021 at 1:16
  • I just started getting this error too. Did you ever figure it out? Commented Jun 9, 2021 at 2:41
  • To be honest i didn't go any further with iit. I went back to Gatsby. Commented Jun 11, 2021 at 6:17

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npx might load a different version of next than your local dependency. I wouldn't recommend running this with npx. Instead make an npm script, or use npm bin next, or if you use yarn you can use local binaries with yarn next.

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ok valid point. If I run yarn next build i still get the same error

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