Switch to kubernetes ipam mode.

nix/kubernetes/keys/flake.nix

@@ -28,5 +28,27 @@
           k8s = (final.callPackage ./scope.nix { inherit (final.lib) makeScope; });
         }
       );
+
+    }
+    // {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          appliedOverlay = self.overlays.default pkgs pkgs;
+        in
+        {
+          default = pkgs.mkShell {
+            nativeBuildInputs = with pkgs; [
+              pkg-config
+            ];
+            buildInputs = with pkgs; [
+              kubernetes-helm # To generate cilium manifests
+              fluxcd # To generate flux manifests
+              cilium-cli # To check cilium status
+            ];
+          };
+        }
+      );
     };
 }