nixos/kodi: add package option

nixos/modules/services/x11/desktop-managers/kodi.nix

@@ -14,6 +14,16 @@ in
         default = false;
         description = "Enable the kodi multimedia center.";
       };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.kodi;
+        defaultText = "pkgs.kodi";
+        example = "pkgs.kodi.withPackages (p: with p; [ jellyfin pvr-iptvsimple vfs-sftp ])";
+        description = ''
+          Package that should be used for Kodi.
+        '';
+      };
     };
   };
 
@@ -21,11 +31,11 @@ in
     services.xserver.desktopManager.session = [{
       name = "kodi";
       start = ''
-        LIRC_SOCKET_PATH=/run/lirc/lircd ${pkgs.kodi}/bin/kodi --standalone &
+        LIRC_SOCKET_PATH=/run/lirc/lircd ${cfg.package}/bin/kodi --standalone &
         waitPID=$!
       '';
     }];
 
-    environment.systemPackages = [ pkgs.kodi ];
+    environment.systemPackages = [ cfg.package ];
   };
 }