diff --git a/core/grub/build b/core/grub/build
index 6722e565..6c449bd7 100755
--- a/core/grub/build
+++ b/core/grub/build
@@ -43,7 +43,7 @@ cp -f grub.default "$1/etc/default/grub"
 
 # Remove gdb debugging files.
 (
-    cd "$pkg_dir/usr/lib"
+    cd "$1/usr/lib"
 
     rm -f grub/*/*.module
     rm -f grub/*/*.image