--- a/boost/python//detail/wrap_python.hpp	2022-12-09 19:16:17
+++ b/boost/python//detail/wrap_python.hpp	2022-12-09 19:18:08
@@ -206,7 +206,8 @@
 
 #ifdef DEBUG_UNDEFINED_FROM_WRAP_PYTHON_H
 # undef DEBUG_UNDEFINED_FROM_WRAP_PYTHON_H
-# define _DEBUG
+// BLENDER: TBB excepts this to have a value.
+# define _DEBUG 1
 # ifdef _CRT_NOFORCE_MANIFEST_DEFINED_FROM_WRAP_PYTHON_H
 #  undef _CRT_NOFORCE_MANIFEST_DEFINED_FROM_WRAP_PYTHON_H
 #  undef _CRT_NOFORCE_MANIFEST