Cannot find namespace 'JSX' when building next.js
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Asian black bear posted this in #help-forum
Asian black bearOP
I am following the [contributors guide](https://github.com/vercel/next.js/blob/canary/contributing/core/developing.md) to build next.js, but
Any ideas for what's going wrong?
pnpm types is failing with @next/env: > @next/env@15.0.0-canary.130 types /root/nextjs/next.js/packages/next-env
@next/env: > tsc --declaration --emitDeclarationOnly --declarationDir dist
@next/env: ../../node_modules/@types/mdx/index.d.ts(72,58): error TS2503: Cannot find namespace 'JSX'.
...Any ideas for what's going wrong?