--- Mesa-7.8.2.orig/src/mesa/shader/slang/library/Makefile	2010-04-27 23:41:21.000000000 +0200
+++ Mesa-7.8.2/src/mesa/shader/slang/library/Makefile	2010-12-04 21:18:11.000000000 +0100
@@ -4,7 +4,7 @@ TOP = ../../../../..
 
 include $(TOP)/configs/current
 
-GLSL_CL = $(TOP)/src/glsl/apps/compile
+GLSL_CL ?= $(TOP)/src/glsl/apps/compile
 
 #
 # targets