anchor.diff:  
   python3Packages.buildPythonApplication rec {
     pname = "gnome-tweaks";
  -  version = "3.34.1";
  +  version = "40.0";
     format = "other";
     strictDeps = false; # https://github.com/NixOS/nixpkgs/issues/56943
   
     src = fetchurl {
  -    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "19y62dj4n5i6v4zpjllxl51dch6ndy8xs45v5aqmmq9xyfrqk5yq";
  +    url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  +    sha256 = "+V8/4DGwsBwC95oWWfiJFS03cq4+RN+EA9FGC6Xuw2o=";
     };
   
     nativeBuildInputs = [
  
positive.code:     gnome3.mutter
      gsettings-desktop-schemas
      gtk3
      libhandy_0
      libnotify
      libsoup
    ];
  
negative.code:   };
  
    meta = with lib; {
      homepage = "https://wiki.gnome.org/Apps/Tweaks";
      description = "A tool to customize advanced GNOME 3 options";
      maintainers = teams.gnome.members;
      license = licenses.gpl3Plus;
      platforms = platforms.linux;
    };
  }
  