anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gnome-boxes";
  -  version = "3.38.2";
  +  version = "40.1";
   
     src = fetchurl {
  -    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "1zjvng0izbws3506998l3dwsxjbm7wnhqipb8nmqzvi096czvajl";
  +    url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  +    sha256 = "seKPLH+3a/T7uGLQ1S6BG5TL6f8W8GdAiWRWhpCILvg=";
     };
   
     doCheck = true;
  
positive.code: , python3
  , appstream-glib
  , spice-protocol
  , libhandy_0
  , libsoup
  , libosinfo
  , systemd
  
negative.code:     libcap
      libcap_ng
      libgudev
      libhandy
      libosinfo
      librsvg
      libsecret
  