diff -r 0610f70e6694 Makefile.pre.in
--- a/Makefile.pre.in	Sun Jun 26 23:48:23 2011 -0700
+++ b/Makefile.pre.in	Mon Jun 27 05:52:36 2011 -0700
@@ -603,10 +603,10 @@
 Parser/pgenmain.o:	$(srcdir)/Include/parsetok.h
 
 $(AST_H): $(AST_ASDL) $(ASDLGEN_FILES)
-	$(ASDLGEN) -h $(AST_H_DIR) $(AST_ASDL)
+	$(PYTHON) $(ASDLGEN) -h $(AST_H_DIR) $(AST_ASDL)
 
 $(AST_C): $(AST_ASDL) $(ASDLGEN_FILES)
-	$(ASDLGEN) -c $(AST_C_DIR) $(AST_ASDL)
+	$(PYTHON) $(ASDLGEN) -c $(AST_C_DIR) $(AST_ASDL)
 
 Python/compile.o Python/symtable.o Python/ast.o: $(GRAMMAR_H) $(AST_H)