Add kustomize

includes/kubernetes/default.nix

@@ -50,6 +50,12 @@ let
     sha256 = "af3608517684e59de94573ad123486edd6f392c8c319ddbde6223d3ac2d37bd9";
     binPath = "k9s";
   };
+  kustomize = buildBinPackage rec {
+    pname = "kustomize";
+    version = "3.2.1";
+    url = "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize/v${version}/kustomize_kustomize.v${version}_linux_amd64";
+    sha256 = "a91b38778945e8a63fe70bc7522703a94c1d572d5dcee245e96647359e1fd04b";
+  };
 in {
   environment.systemPackages = with pkgs; [
     kubectl
@@ -59,6 +65,7 @@ in {
     helm
     eksctl
     k9s
+    kustomize
     aws-iam-authenticator
   ];
 }