diff --git a/external/glib/generate_cppgir.cmake b/external/glib/generate_cppgir.cmake
index 743b77f..a95d513 100644
--- a/external/glib/generate_cppgir.cmake
+++ b/external/glib/generate_cppgir.cmake
@@ -21,6 +21,8 @@ function(generate_cppgir target_name gir)
         ${gen_timestamp}
     COMMAND
         cppgir
+        --debug
+        1
         --class
         --expected
         --ignore