--- Makefile.pre.in.orig	2013-04-08 06:45:53.000000000 +0200
+++ Makefile.pre.in	2013-04-08 06:46:14.000000000 +0200
@@ -283,7 +283,7 @@
 # AST
 AST_H_DIR=	Include
 AST_H=		$(AST_H_DIR)/Python-ast.h
-AST_C_DIR=	Python
+AST_C_DIR=	$(srcdir)/Python
 AST_C=		$(AST_C_DIR)/Python-ast.c
 AST_ASDL=	$(srcdir)/Parser/Python.asdl