Self-service

• I'd be willing to implement a fix

Describe the bug

The issue is a bit bizarre to start with. In a repo that uses docusarus I tried bumping yarn from 4.1.1 to the newest 4.10.3 and I encountered this bug.

In docusaurus docs I import typescript for an interactive playground. The docs build just fine. However, upgrading yarn yields the following error, coming from webpack:

[ERROR] Client bundle compiled with errors therefore further build is impossible.
Module not found: Error: Can't resolve 'module' in '/Users/user/my-website/node_modules/typescript/lib'

Clearly something is wrong as there's no module file or module dir in typescript/lib and this lookup doesn't make sense.

When I went into further debugging and I did the following change to the package.json of TS package:

 "browser": {
 "fs": false,
 "os": false,
 "path": false,
 "crypto": false,
 "buffer": false,
 "source-map-support": false,
 "inspector": false,
 "perf_hooks": false,
+ "typescript": "./lib/module.js" 
 },

The build worked but then it failed at runtime

What's interesting here is that pnp is mentioned in the stack trace but my setup doesn't use pnp. My guess would be that something in the environment in yarn changed so that pnp is used even when it shouldn't.

To reproduce

To create a blank docusarus project:

1. npx create-docusaurus@latest my-website classic --typescript --skip-install.

Setup yarn in repository:

1. cd my-website
2. yarn set version 4.1.1
3. yarn config set nodeLinker node-modules
4. yarn config set enableGlobalCache false

Add typescript as a dependency:

1. yarn add typescript@5.8.3

Add the following in the top level of src/pages/index.tsx to include typescript in the built docs:

// src/pages/index.tsx
import ts from "typescript";
console.log(
 ts.transpileModule("function foo():void {}", {
 compilerOptions: { sourceMap: true },
 }).sourceMapText
);

Run the build and see that it passes without errors:

1. yarn build

Bump yarn version to 4.10.3 and make sure to wipe all the caches:

1. yarn set version 4.10.3
2. rm -fr build .docusaurus node_modules .yarn yarn.lock

Run yarn build again to get the error.

Environment

System:
 OS: macOS 15.6
 CPU: (14) arm64 Apple M4 Pro
 Binaries:
 Node: 22.14.0 - /private/var/folders/jg/m839qn593nn7w_h3n0r9k25c0000gn/T/xfs-4e799f27/node
 Yarn: 4.10.3 - /private/var/folders/jg/m839qn593nn7w_h3n0r9k25c0000gn/T/xfs-4e799f27/yarn
 npm: 10.9.2 - /Users/bigpoppe/.nvm/versions/node/v22.14.0/bin/npm

Additional context

No response