package(technitium-dns-server): switch module to own package override

modules/nixos/services/technitium-dns-server/default.nix

@@ -1,26 +1,24 @@
 {
-  config,
   lib,
   pkgs,
+  config,
   namespace,
   ...
 }:
-
+with lib;
+with lib.${namespace};
 let
   cfg = config.${namespace}.services.technitium-dns-server;
-  inherit (lib)
-    mkEnableOption
-    mkPackageOption
-    mkOption
-    mkIf
-    types
-    ;
 in
 {
   options.${namespace}.services.technitium-dns-server = {
     enable = mkEnableOption "Technitium DNS Server";
 
-    package = mkPackageOption pkgs "technitium-dns-server" { };
+    package = mkOption {
+      description = "The package of Technitium to use.";
+      type = types.package;
+      default = pkgs.awesome-flake.technitium-dns-server;
+    };
 
     openFirewall = mkOption {
       type = types.bool;

overlays/technitium-dns-server/default.nix

@@ -0,0 +1,22 @@
+{
+  channels,
+  inputs,
+  ...
+}:
+
+final: prev: {
+  awesome-flake = (prev.awesome-flake or { }) // {
+    technitium-dns-server = prev.technitium-dns-server.overrideAttrs (_old: rec {
+      pname = "technitium-dns-server";
+      version = "13.6.0";
+
+      src = final.fetchFromGitHub {
+        owner = "TechnitiumSoftware";
+        repo = "DnsServer";
+        tag = "v${version}";
+        hash = "sha256-2OSuLGWdaiiPxyW0Uvq736wHKa7S3CHv79cmZZ86GRE=";
+        name = "${pname}-${version}";
+      };
+    });
+  };
+}