diff --git a/scone/head/kitchen.py b/scone/head/kitchen.py
index 2653aa7..584f1a8 100644
--- a/scone/head/kitchen.py
+++ b/scone/head/kitchen.py
@@ -244,7 +244,7 @@ class Kitchen:
             return prev_book, False
 
         # compute and compare the var hash...
-        sous_vars = self.head.variables[recipe.recipe_context.sous]
+        sous_vars = recipe.recipe_context.variables
         vars_to_hash = {}
         for var in prev_book.var_list:
             vars_to_hash[var] = sous_vars.get_dotted(var)