Have a clear list of directories where yarn should be executed

build/npm/dirs.js

@@ -0,0 +1,48 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+// Complete list of directories where yarn should be executed to install node modules
+exports.dirs = [
+	'',
+	'build',
+	'build/lib/watch',
+	'extensions',
+	'extensions/configuration-editing',
+	'extensions/css-language-features',
+	'extensions/css-language-features/server',
+	'extensions/debug-auto-launch',
+	'extensions/debug-server-ready',
+	'extensions/emmet',
+	'extensions/extension-editing',
+	'extensions/git',
+	'extensions/git-ui',
+	'extensions/github',
+	'extensions/github-authentication',
+	'extensions/grunt',
+	'extensions/gulp',
+	'extensions/html-language-features',
+	'extensions/html-language-features/server',
+	'extensions/image-preview',
+	'extensions/jake',
+	'extensions/json-language-features',
+	'extensions/json-language-features/server',
+	'extensions/markdown-language-features',
+	'extensions/merge-conflict',
+	'extensions/microsoft-authentication',
+	'extensions/npm',
+	'extensions/php-language-features',
+	'extensions/search-result',
+	'extensions/typescript-language-features',
+	'extensions/vscode-api-tests',
+	'extensions/vscode-colorize-tests',
+	'extensions/vscode-custom-editor-tests',
+	'extensions/vscode-notebook-tests',
+	'extensions/vscode-test-resolver',
+	'remote',
+	'remote/web',
+	'test/automation',
+	'test/integration/browser',
+	'test/smoke',
+];