diff -up Mesa-7.1pre/configs/default.da Mesa-7.1pre/configs/default
--- Mesa-7.1pre/configs/default.da	2007-11-07 08:44:17.000000000 +1000
+++ Mesa-7.1pre/configs/default	2007-11-07 08:44:28.000000000 +1000
@@ -82,7 +82,7 @@ APP_LIB_DEPS = -lm
 
 # Installation directories (for make install)
 INSTALL_DIR = /usr/local
-DRI_DRIVER_INSTALL_DIR = /usr/X11R6/lib/modules/dri
+DRI_DRIVER_INSTALL_DIR = $(DRI_DRIVER_DIR)
 
 # Where libGL will look for DRI hardware drivers
 DRI_DRIVER_SEARCH_DIR = $(DRI_DRIVER_INSTALL_DIR)