diff --git a/hosts/dnsc-machine/default.nix b/hosts/dnsc-machine/default.nix
index 0f62031..cd76017 100644
--- a/hosts/dnsc-machine/default.nix
+++ b/hosts/dnsc-machine/default.nix
@@ -34,7 +34,11 @@ in
     inputs.zellij-switch.overlays.default
 
     (final: prev: {
-      python313Packages.python-dbusmock = backportPkgs.python313Packages.python-dbusmock;
+      python313Packages = prev.python313Packages.overrideScope (
+        pyFinal: pyPrev: {
+          python-dbusmock = backportPkgs.python313Packages.python-dbusmock;
+        }
+      );
     })
   ];