diff --git a/ambuild2/frontend/v2_2/context_manager.py b/ambuild2/frontend/v2_2/context_manager.py
index 3ed3b487..5c895e70 100644
--- a/ambuild2/frontend/v2_2/context_manager.py
+++ b/ambuild2/frontend/v2_2/context_manager.py
@@ -142,6 +142,7 @@ def execContext(self, context):
 
         # Copy vars so changes don't get inherited.
         scriptGlobals = copy.copy(context.vars_)
+        scriptGlobals['__file__'] = context.script_
 
         self.pushContext(context)
         try: