diff --git a/hosts/dnsc-machine/default.nix b/hosts/dnsc-machine/default.nix
index 355be6b..c594621 100644
--- a/hosts/dnsc-machine/default.nix
+++ b/hosts/dnsc-machine/default.nix
@@ -34,7 +34,9 @@ in
     inputs.zellij-switch.overlays.default
 
     (final: prev: {
-      python3Packages.python-dbusmock = backportPkgs.python3Packages.python-dbusmock;
+      python3Packages.python-dbusmock = backportPkgs.python3Packages.python-dbusmock.override {
+        inherit (backportPkgs) "python3Packages.buildPythonApplication";
+      };
     })
   ];