[BUG] Inconsistent values for `npm_package_*` env variable when executing command in workspace since npm v8.8.0

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

Since npm v8.8.0 (also confirmed with v8.10.0), the environment variables available to a command execution in a workspace seem to be inconsistent:

While the npm_package_json variable still points to the package.json of the given workspace, npm_package_name and npm_package_version are now taken from the root project's package.json.

Example:

npm_package_json=/npm-workspace-test/my-module-a/package.json
npm_package_name=npm-workspace-test # root package name
npm_package_version=1.0.0

Expected Behavior

With npm v8.7.0, npm_package_name and npm_package_version where taken from the workspace:

npm_package_json=/npm-workspace-test/my-module-a/package.json
npm_package_name=my-module-a # workspace package name
npm_package_version=0.0.1

This allowed tools to access for example the name of the package they are currently processing. I would not expect the root project's package name here and therefore suspect this to be a bug.

Steps To Reproduce

I created a demo repository for this issue: https://github.com/RandomByte/npm-workspace-test

git clone https://github.com/RandomByte/npm-workspace-test.git
cd npm-workspace-test && npm install

Get all available environment variables for the workspace command and filter for npm_package_*:

npm exec -w my-module-a -c "env" | grep "npm_package_"

Output with npm v8.8.0 and v8.10.0:

npm_package_json=/npm-workspace-test/my-module-a/package.json
npm_package_name=npm-workspace-test # root package name
npm_package_version=1.0.0

Output with npm v8.7.0:

npm_package_json=/my-module-a/package.json
npm_package_name=my-module-a # workspace package name
npm_package_version=0.0.1

Environment

• npm: 8.10.0
• Node.js: v17.9.0
• OS Name: macOS Monterey
• System Model Name: MacBook Pro

Clone the linked npm-workspace-test repository, install dependencies, and run the provided npm exec -w my-module-a command with npm 8.7.0 and 8.8.0 or later. Compare the npm_package_* output for the workspace; done means npm_package_name and npm_package_version consistently describe the selected workspace rather than the root project.