[BUG] Windows monorepo only: EISDIR: illegal operation on a directory, symlink

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

Current Behavior

Running npm install in a mono repo in Windows causes an error:

npm ERR! code EISDIR
npm ERR! syscall symlink
npm ERR! path Z:\vscode-mdx\demo
npm ERR! dest Z:\vscode-mdx\node_modules\@mdx-js\monaco-demo
npm ERR! errno -4068
npm ERR! EISDIR: illegal operation on a directory, symlink 'Z:\vscode-mdx\demo' -> 'Z:\vscode-mdx\node_modules\@mdx-js\monaco-demo'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\remco\AppData\Local\npm-cache\_logs\2022-12-29T15_29_33_735Z-debug-0.log

Expected Behavior

I expect to be able to run npm install in a mono repo in Windows.

Steps To Reproduce

1. Using Windows, clone remcohaszing/vscode-mdx and switch to the intellisense branch.

   git clone git@github.com:remcohaszing/vscode-mdx.git
   cd vscode-mdx
   git switch intellisense
   

2. Now run npm install
3. This results in the error described above

Environment

• npm: 9.2.0
• Node.js: 19.3.0
• OS Name: Windows 11
• System Model Name: VirtualBox
• npm config:

; "builtin" config from C:\Program Files\nodejs\node_modules\npm\npmrc

prefix = "C:\\Users\\remco\\AppData\\Roaming\\npm"

; "project" config from Z:\vscode-mdx\.npmrc

package-lock = false

; "cli" config from command line options

location = "project"

; node bin location = C:\Program Files\nodejs\node.exe
; node version = v19.3.0
; npm local prefix = Z:\vscode-mdx
; npm version = 9.2.0
; cwd = Z:\vscode-mdx
; HOME = C:\Users\remco
; Run `npm config ls -l` to show all defaults.

Reproduce the failure on Windows by cloning remcohaszing/vscode-mdx, switching to the intellisense branch, and running npm install. Investigate npm's monorepo symlink handling for the demo path and verify that installation completes without the EISDIR error.