diff --git a/lib/cli/src/js-package-manager/JsPackageManager.ts b/lib/cli/src/js-package-manager/JsPackageManager.ts
index 54a81a945c4e..39e0c78f873c 100644
--- a/lib/cli/src/js-package-manager/JsPackageManager.ts
+++ b/lib/cli/src/js-package-manager/JsPackageManager.ts
@@ -224,6 +224,6 @@ export abstract class JsPackageManager {
       throw new Error(commandResult.stderr.toString());
     }
 
-    return commandResult.stdout.toString();
+    return commandResult.stdout ? commandResult.stdout.toString() : '';
   }
 }