diff --git a/src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts b/src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts
index fa43cce63bed42047e2c86436cf330e5c6b1e681..08bea3cd73430ea45f8fa6496f8bf224c99a9135 100644
--- a/src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts
+++ b/src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts
@@ -98,10 +98,11 @@ export class WebWorkerExtensionHost extends Disposable implements IExtensionHost
const escapeAttribute = (value: string): string => {
return value.replace(/"/g, '"');
};
+ const isBuilt = this._environmentService.isBuilt;
const html = `
-
+