enable sddm sugar dark theme

modules/nixos/desktop/awesome/default.nix

@@ -6,7 +6,10 @@
   services = {
     displayManager = {
       sddm = {
+        package = pkgs.libsForQt5.sddm;
+        extraPackages = with pkgs; [libsForQt5.qt5.qtgraphicaleffects];
         enable = true;
+        theme = "sugar-dark";
       };
     };
 
@@ -70,5 +73,6 @@
     sct
     slop
     speedcrunch
+    sddm-sugar-dark
   ];
 }

pkgs/sugar-sddm-theme/default.nix

@@ -1,20 +0,0 @@
-{
-  stdenv,
-  fetchFromGitHub,
-}: {
-  sddm-sugar-dark = stdenv.mkDerivation rec {
-    pname = "sddm-sugar-dark-theme";
-    version = "1.2";
-    dontBuild = true;
-    installPhase = ''
-      mkdir -p $out/share/sddm/themes
-      cp -aR $src $out/share/sddm/themes/sugar-dark
-    '';
-    src = fetchFromGitHub {
-      owner = "MarianArlt";
-      repo = "sddm-sugar-dark";
-      rev = "v${version}";
-      sha256 = "0gx0am7vq1ywaw2rm1p015x90b75ccqxnb1sz3wy8yjl27v82yhb";
-    };
-  };
-}