diff --git a/hosts/dnsc-machine/default.nix b/hosts/dnsc-machine/default.nix
index 3ee62a1..4a0336d 100644
--- a/hosts/dnsc-machine/default.nix
+++ b/hosts/dnsc-machine/default.nix
@@ -44,11 +44,7 @@ in
       python313Packages = prev.python313Packages.overrideScope (
         pyFinal: pyPrev: {
           python-dbusmock = pyPrev.python-dbusmock.overridePythonAttrs (old: {
-            # take the *source* (or patches) from the backport
-            src = backportPkgs.python313Packages.python-dbusmock.src;
-
-            # optional but often needed
-            patches = (old.patches or [ ]) ++ (backportPkgs.python313Packages.python-dbusmock.patches or [ ]);
+            doCheck = false;
           });
         }
       );