anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gnome-calendar";
  -  version = "42.2";
  +  version = "43.alpha";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  -    sha256 = "rnzGOq6WoCqlmbbWo0hYX0529ylTbznvt0QwKwW1+70=";
  +    sha256 = "VJOLEzJq0L4xYp/RL9/tJgp0A8AIehU0TaNYxgxGyuc=";
     };
   
     nativeBuildInputs = [
  
positive.code: , wrapGAppsHook4
  , libgweather
  , geoclue2
  , geocode-glib
  , gettext
  , libxml2
  , gnome
  , gtk4
  , evolution-data-server
  , libical
  , libsoup
  , glib
  , gsettings-desktop-schemas
  , libadwaita
  
negative.code: 
    buildInputs = [
      gtk4
      evolution-data-server-gtk4
      libical
      libsoup_3
      glib
      libgweather
      geoclue2
      geocode-glib_2
      gsettings-desktop-schemas
      libadwaita
    ];
  