fix networkmanager

hosts/dnsc-machine/default.nix

@@ -6,6 +6,9 @@
   ...
 }:
 
+let
+  backportPkgs = inputs.nixpkgs-backport-fix.legacyPackages.${pkgs.system};
+in
 {
   imports = [
     # Include the results of the hardware scan.
@@ -29,6 +32,10 @@
   # in modules/default.nix
   nixpkgs.overlays = [
     inputs.zellij-switch.overlays.default
+
+    (final: prev: {
+      networkmanager = backportPkgs.networkmanager;
+    })
   ];
 
   # General settings