diff --git a/pkgs/os-specific/linux/ati-drivers/builder.sh b/pkgs/os-specific/linux/ati-drivers/builder.sh
index 4394e785960..b9f6ed22cba 100644
--- a/pkgs/os-specific/linux/ati-drivers/builder.sh
+++ b/pkgs/os-specific/linux/ati-drivers/builder.sh
@@ -257,7 +257,7 @@ if test -z "$libsOnly"; then
     # a symlink named libfglrx_gamma.so.1 linking to libfglrx_gamma.so.1.0 in $out/lib/
 
     cd programs/fglrx_gamma
-    gcc -fPIC -I${libXxf86vm}/include \
+    gcc -fPIC -I${libXxf86vm.dev}/include \
 	    -I${xf86vidmodeproto}/include \
 	    -I$out/X11R6/include \
 	    -L$out/lib \