Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.96.1
• OS Version: MacOS 14.1.1

Steps to Reproduce:

1. Open the gulpfile.vscode.js file located at https://github.com/microsoft/vscode/blob/1.96.1/build/gulpfile.vscode.js#L302.
2. Observe the duplicate entries of !**/*.mk in the dependenciesSrc configuration.

PR: #236683