adding a flake to nix-mode

templates

@@ -143,3 +143,34 @@ qml-mode
 (icon "Kirigami.Icon {" n> "id: " r n "}">)
 (search "Kirigami.SearchField {" n> "id: " r n "}">)
 
+nix-mode
+
+(flake "{
+  description = " (s description) ";
+
+  inputs = {
+    nixpkgs.url = \"github:nixos/nixpkgs/nixos-unstable\";
+    flake-utils.url = \"github:numtide/flake-utils\";
+  };
+
+  outputs = inputs: with inputs;
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+          };
+        in rec
+        {
+          devShell = pkgs.mkShell {
+            " p "
+            buildInputs = with pkgs; [
+              stdenv
+              gnumake
+              pkg-config
+            ];
+          };
+          defaultPackage = pkgs.libsForQt5.callPackage ./default.nix { };
+        }
+      );
+}")