message: Support `kubectl`
diff: { pkgs ? (import <nixpkgs>) { } }:
  -pkgs.mkShell { buildInputs = with pkgs; [ skopeo ]; }
  +pkgs.mkShell {
  + buildInputs = with pkgs; [ skopeo kubectl ];
  +
  + shellHook = ''
  + export KUBECONFIG=$(pwd)/k3s.yaml
  + '';
  +}
  