modules(plasma): Add wallpaper engine + add yakuake and kgpg

flake.nix

@@ -3,7 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    nur.url = github:nix-community/NUR;
+    nur.url = "github:nix-community/NUR";
 
     home-manager = {
       url = "github:nix-community/home-manager";

modules/system/desktop/plasma/default.nix

@@ -3,6 +3,10 @@
 with lib;
 let
   cfg = config.modules.system.desktop.plasma;
+  nixpkgsPr = builtins.fetchTarball {
+    url = "https://github.com/Sicheng-Pan/nixpkgs/archive/5ba93319d81da028339755243fa405556a2b18d7.tar.gz";
+    sha256 = "0xiighffwyhis6ni815s6bqcrvhsr3s7c208sq3c4y5p2f1g397w";
+  };
 in
 {
   options.modules.system.desktop.plasma = {
@@ -26,6 +30,17 @@ in
     environment.systemPackages = with pkgs; with kdePackages; [
       krfb # Use by kdeconnect for virtualmonitorplugin "krfb-virtualmonitor"
       discover
+      kgpg
+      yakuake
+
+      ### wallpaper-engine-plugin
+      (callPackage "${nixpkgsPr}/pkgs/kde/third-party/wallpaper-engine-plugin/default.nix" {})
+      qtmultimedia
+      qtwebchannel
+      qtwebengine
+      qtwebsockets
+      (python3.withPackages (python-pkgs: [ python-pkgs.websockets ]))
+      ###
     ];
   };
 }