anchor.diff:  { lib
   , stdenv
   , fetchFromGitHub
  +, gitUpdater
   , glib
   , gnome-shell
   , gnome-themes-extra
  
positive.code:       ${lib.optionalString (panelSize != null) ("--panel-size " + panelSize)} \
        --dest $out/share/themes
  
      jdupes --link-soft --recurse $out/share
  
      runHook postInstall
    '';
  
    meta = with lib; {
      description = "MacOS Big Sur like theme for Gnome desktops";
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "whitesur-gtk-theme";
    version = "2022-10-27";
  
    src = fetchFromGitHub {
      owner = "vinceliuice";
      repo = pname;
      rev = version;
      sha256 = "sha256-jOrTasnkNExCgvST+09JOQ0iosjoEu3aoj3C1pNHTgY=";
    };
  
    nativeBuildInputs = [
  