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:   meta = with lib; {
      description = "Simple GNOME 3 application to access remote or virtual systems";
      homepage = "https://wiki.gnome.org/Apps/Boxes";
      license = licenses.gpl3;
      platforms = platforms.linux;
      maintainers = teams.gnome.members;
    };
  
negative.code:     libcap
      libcap_ng
      libgudev
      libhandy
      libosinfo
      librsvg
      libsecret
  