anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gnome-boxes";
  -  version = "43.alpha";
  +  version = "43.beta";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  -    sha256 = "BEUHGaCDN8/fF1D18N82gwc7Xg6kisynSb4j0Ev7+yY=";
  +    sha256 = "WqNgpIepZCy/qJLNVFlgCXCRLT6FjyCKJDlz0Jev7Ts=";
     };
   
     patches = [
  
positive.code: , gobject-introspection
  , libxml2
  , gtk3
  , gtksourceview4
  , libvirt
  , spice-gtk
  , python3
  
negative.code:     gmp
      gnome.adwaita-icon-theme
      gtk3
      json-glib
      libapparmor
      libarchive
  