diff --git a/build/importEditorWebpackPlugin.js b/build/importEditorWebpackPlugin.js
index 3e598fee..0f880db5 100644
--- a/build/importEditorWebpackPlugin.js
+++ b/build/importEditorWebpackPlugin.js
@@ -3,11 +3,12 @@
  *  Licensed under the MIT License. See LICENSE in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+//@ts-check
+
 const glob = require('glob');
 const path = require('path');
 const fs = require('fs');
-
-const REPO_ROOT = path.join(__dirname, '..');
+const { REPO_ROOT } = require('./utils');
 
 const customFeatureLabels = {
 	'vs/editor/browser/controller/coreCommands': 'coreCommands',
@@ -187,6 +188,10 @@ export type EditorLanguage = ${result.map((el) => `'${el.label}'`).join(' | ')};
 	);
 }
 
+/**
+ * @tyoe {string} a
+ * @tyoe {string} b
+ */
 function strcmp(a, b) {
 	if (a < b) {
 		return -1;
@@ -197,9 +202,6 @@ function strcmp(a, b) {
 	return 0;
 }
 
-/**
- * @returns { string[] }
- */
 function generateFeatures() {
 	const skipImports = [
 		'vs/editor/browser/widget/codeEditorWidget',
@@ -212,6 +214,7 @@ function generateFeatures() {
 		'vs/editor/contrib/gotoSymbol/documentSymbols'
 	];
 
+	/** @type {string[]} */
 	let features = [];
 	const files =
 		fs.readFileSync(path.join(REPO_ROOT, 'release/esm/vs/editor/edcore.main.js')).toString() +
@@ -226,6 +229,7 @@ function generateFeatures() {
 		}
 	});
 
+	/** @type {{label:string;entry:any;}[]} */
 	let result = features.map((feature) => {
 		return {
 			label: customFeatureLabels[feature] || path.basename(path.dirname(feature)),
diff --git a/build/importTypescript.js b/build/importTypescript.js
index 3dcb3551..b1a8847e 100644
--- a/build/importTypescript.js
+++ b/build/importTypescript.js
@@ -3,16 +3,18 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+//@ts-check
+
 const path = require('path');
 const fs = require('fs');
 const child_process = require('child_process');
+const { REPO_ROOT } = require('./utils');
 
 const generatedNote = `//
 // **NOTE**: Do not edit directly! This file is generated using \`npm run import-typescript\`
 //
 `;
 
-const REPO_ROOT = path.join(__dirname, '../');
 const TYPESCRIPT_LIB_SOURCE = path.join(REPO_ROOT, 'node_modules/typescript/lib');
 const TYPESCRIPT_LIB_DESTINATION = path.join(REPO_ROOT, 'src/typescript/lib');
 
diff --git a/build/npm/installAll.js b/build/npm/installAll.js
index ca015aeb..adb0dff7 100644
--- a/build/npm/installAll.js
+++ b/build/npm/installAll.js
@@ -10,8 +10,7 @@ const path = require('path');
 const fs = require('fs');
 const cp = require('child_process');
 const npm = process.platform === 'win32' ? 'npm.cmd' : 'npm';
-
-const REPO_ROOT = path.join(__dirname, '../../');
+const { REPO_ROOT } = require('../utils');
 
 const files = glob.sync('**/package.json', {
 	cwd: REPO_ROOT,
diff --git a/build/npm/removeAll.js b/build/npm/removeAll.js
index 72330798..f67f3f82 100644
--- a/build/npm/removeAll.js
+++ b/build/npm/removeAll.js
@@ -8,8 +8,7 @@
 const glob = require('glob');
 const path = require('path');
 const fs = require('fs');
-
-const REPO_ROOT = path.join(__dirname, '../../');
+const { REPO_ROOT } = require('../utils');
 
 const files = glob.sync('**/package-lock.json', {
 	cwd: REPO_ROOT,
diff --git a/build/utils.js b/build/utils.js
index b6c3f1c3..d7bd4d04 100644
--- a/build/utils.js
+++ b/build/utils.js
@@ -9,9 +9,11 @@ const fs = require('fs');
 const path = require('path');
 const cp = require('child_process');
 const esbuild = require('esbuild');
+/** @type {any} */
 const alias = require('esbuild-plugin-alias');
 
-const REPO_ROOT = path.join(__dirname, '..');
+const REPO_ROOT = path.join(__dirname, '../');
+exports.REPO_ROOT = REPO_ROOT;
 
 /**
  * @param {string} dirname