diff --git a/pkg/pub_worker/lib/src/bin/pana_wrapper.dart b/pkg/pub_worker/lib/src/bin/pana_wrapper.dart
index 203827375..4480cca81 100644
--- a/pkg/pub_worker/lib/src/bin/pana_wrapper.dart
+++ b/pkg/pub_worker/lib/src/bin/pana_wrapper.dart
@@ -167,7 +167,10 @@ Future<void> main(List<String> args) async {
     docDir: rawDartdocOutputFolder.path,
   );
 
-  await rawDartdocOutputFolder.delete(recursive: true);
+  // existence check is needed as post-processing may delete this directory
+  if (rawDartdocOutputFolder.existsSync()) {
+    await rawDartdocOutputFolder.delete(recursive: true);
+  }
 }
 
 final _workerConfigDirectory = Directory('/home/worker/config');