anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gnome-tour";
  -  version = "40.1";
  +  version = "42.beta";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  -    hash = "sha256-rYYS110B7qY8WcmY65KOvm75mEZgYbn8H97IKF02M5g=";
  +    hash = "sha256-c8NnZvWcqnnYXKuooveqaize81fBT6JZHgXck7Fbx+I=";
     };
   
     cargoVendorDir = "vendor";
  
positive.code: , ninja
  , fetchurl
  , pkg-config
  , gtk3
  , glib
  , gdk-pixbuf
  , desktop-file-utils
  
negative.code:   buildInputs = [
      gdk-pixbuf
      glib
      gtk4
      libadwaita
      librsvg
    ];
  
    passthru = {
      updateScript = gnome.updateScript {
  