diff --git a/default.nix b/default.nix
index f36fe6e..f89a66c 100644
--- a/default.nix
+++ b/default.nix
@@ -76,7 +76,7 @@ rec {
     };
   });
 
-  polybar = polybar.overrideAttrs (oldAttrs: {
+  polybar = pkgs.polybar.overrideAttrs (oldAttrs: {
     # Enables an extra button in formatting, indirectly allowing the use of
     # the mouse forward and backward buttons.
     patches = (oldAttrs.patches or [ ]) ++ [ ./pkgs/applications/misc/polybar/9button.patch ];