diff --git a/examples/dart/cli_headless/pubspec.yaml b/examples/dart/cli_headless/pubspec.yaml
index 979743ae..a9f42913 100644
--- a/examples/dart/cli_headless/pubspec.yaml
+++ b/examples/dart/cli_headless/pubspec.yaml
@@ -5,6 +5,12 @@ version: 1.0.0
 environment:
   sdk: ^3.3.0
 
+hooks:
+  user_defines:
+    thermion_dart: 
+      mode: debug
+      tracing: enabled
+
 dependencies:
   thermion_dart: 
     path: ../../../thermion_dart