[BUG] `npm-run`: Running a command in the context of a workspace, also runs the command in the context of workspaces residing in subfolders of the first workspace

[sangafabrice]

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

npm-run: Running a command in the context of a workspace, also runs the command in the context of workspaces residing in subfolders of the first workspace.

Expected Behavior

npm-run: Running a command in the context of a workspace, should only run the command of that workspace. The steps to reproduce described below should ouput:

> test
> echo test from build

test from build

Steps To Reproduce

1. In this environment:

root
│   package.json
│
└───build
    │   package.json
    │
    └───minify
            package.json

2. With this config:

root/package.json

{
  "name": "root",
  "workspaces": [ "build", "build/minify" ]
}

root/build/package.json

{
  "name": "build",
  "scripts": {
    "test": "echo test from build"
  }
}

root/build/minify/package.json

{
  "name": "@build/minify",
  "scripts": {
    "test": "echo test from build/minify"
  }
}

3. Run

npm run test --workspace=build

4. See error:

> test
> echo test from build

test from build

> test
> echo test from build/minify

test from build/minify

Environment

• npm: 11.6.3
• Node.js: 24.11.1
• OS Name: Windows 10 22H2
• System Model Name: Lenovo Legion Y520
• npm config:

; "builtin" config from C:\Users\username\AppData\Roaming\npm\node_modules\npm\npmrc

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

; node bin location = C:\nvm4w\nodejs\node.exe
; node version = v24.11.1
; npm local prefix = C:\root
; npm version = 11.6.3
; cwd = C:\root
; HOME = C:\Users\username
; Run `npm config ls -l` to show all defaults.