diff --git a/build/lib/extensions.ts b/build/lib/extensions.ts
index 7ddfbb0358776..c8e60da21e4df 100644
--- a/build/lib/extensions.ts
+++ b/build/lib/extensions.ts
@@ -228,11 +228,13 @@ const baseHeaders = {
 	'X-Market-User-Id': '291C1CD0-051A-4123-9B4B-30D60EF52EE2',
 };
 
-export function fromMarketplace(serviceUrl: string, { name: extensionName, version, sha256, metadata }: IExtensionDefinition): Stream {
+export function fromMarketplace(serviceUrl: string, { name: extensionName, version, sha256, metadata, platforms }: IExtensionDefinition): Stream {
 	const json = require('gulp-json-editor') as typeof import('gulp-json-editor');
 
 	const [publisher, name] = extensionName.split('.');
-	const url = `${serviceUrl}/publishers/${publisher}/vsextensions/${name}/${version}/vspackage`;
+	const url = platforms && !platforms.includes(process.platform)
+		? `${serviceUrl}/publishers/${publisher}/vsextensions/${name}/${version}/vspackage?targetPlatform=${process.platform}`
+		: `${serviceUrl}/publishers/${publisher}/vsextensions/${name}/${version}/vspackage`;
 
 	fancyLog('Downloading extension:', ansiColors.yellow(`${extensionName}@${version}`), '...');