diff --git a/build/gulpfile.editor.ts b/build/gulpfile.editor.ts
index 394a2cf2b6d..e0ca982a569 100644
--- a/build/gulpfile.editor.ts
+++ b/build/gulpfile.editor.ts
@@ -279,7 +279,12 @@ export const monacoTypecheckWatchTask = task.define('monaco-typecheck-watch', cr
 export const monacoTypecheckTask = task.define('monaco-typecheck', createTscCompileTask(false));
 
 //#endregion
-
+/**
+ * Sets a field on an object only if it's not already set, otherwise throws an error
+ * @param obj The object to modify
+ * @param field The field name to set
+ * @param value The value to set
+ */
 function setUnsetField(obj: Record<string, unknown>, field: string, value: unknown) {
 	if (obj[field] !== undefined) {
 		throw new Error(`Field "${field}" is already set (but was expected to not be).`);
diff --git a/build/gulpfile.reh.ts b/build/gulpfile.reh.ts
index 92427baf51c..cb1a0a5fd69 100644
--- a/build/gulpfile.reh.ts
+++ b/build/gulpfile.reh.ts
@@ -289,10 +289,11 @@ function packageTask(type: string, platform: string, arch: string, sourceFolderN
 				return !isUIExtension(manifest);
 			}).map((extensionPath) => path.basename(path.dirname(extensionPath)))
 			.filter(name => name !== 'vscode-api-tests' && name !== 'vscode-test-resolver'); // Do not ship the test extensions
-		const marketplaceExtensions = JSON.parse(fs.readFileSync(path.join(REPO_ROOT, 'product.json'), 'utf8')).builtInExtensions
-			.filter((entry: { platforms?: string[]; clientOnly?: boolean }) => !entry.platforms || new Set(entry.platforms).has(platform))
-			.filter((entry: { clientOnly?: boolean }) => !entry.clientOnly)
-			.map((entry: { name: string }) => entry.name);
+		const builtInExtensions: Array<{ name: string; platforms?: string[]; clientOnly?: boolean }> = JSON.parse(fs.readFileSync(path.join(REPO_ROOT, 'product.json'), 'utf8')).builtInExtensions;
+		const marketplaceExtensions = builtInExtensions
+			.filter(entry => !entry.platforms || new Set(entry.platforms).has(platform))
+			.filter(entry => !entry.clientOnly)
+			.map(entry => entry.name);
 		const extensionPaths = [...localWorkspaceExtensions, ...marketplaceExtensions]
 			.map(name => `.build/extensions/${name}/**`);
 
diff --git a/build/lib/typings/@vscode/gulp-electron.d.ts b/build/lib/typings/@vscode/gulp-electron.d.ts
index ef47934eb98..aaf1b861a87 100644
--- a/build/lib/typings/@vscode/gulp-electron.d.ts
+++ b/build/lib/typings/@vscode/gulp-electron.d.ts
@@ -1,8 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
 declare module '@vscode/gulp-electron' {
 
 	interface MainFunction {
 		(options: any): NodeJS.ReadWriteStream;
-
 		dest(destination: string, options: any): NodeJS.ReadWriteStream;
 	}
 
diff --git a/build/lib/typings/gulp-untar.d.ts b/build/lib/typings/gulp-untar.d.ts
index 7b43fd52a01..b4007983cac 100644
--- a/build/lib/typings/gulp-untar.d.ts
+++ b/build/lib/typings/gulp-untar.d.ts
@@ -6,9 +6,6 @@
 declare module 'gulp-untar' {
 	import type { Transform } from 'stream';
 
-	/**
-	 * Extract TAR files
-	 */
 	function untar(): Transform;
 
 	export = untar;
diff --git a/build/lib/typings/rcedit.d.ts b/build/lib/typings/rcedit.d.ts
index 50a6ba7fb8f..e18d3f93584 100644
--- a/build/lib/typings/rcedit.d.ts
+++ b/build/lib/typings/rcedit.d.ts
@@ -1,5 +1,8 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
 
 declare module 'rcedit' {
-
 	export default function rcedit(exePath, options, cb): Promise<void>;
 }