anchor.diff:        gsettings-desktop-schemas libosinfo gtk3
       ] ++ optional spiceSupport spice-gtk;
   
  -  propagatedBuildInputs = with python2Packages;
  +  propagatedBuildInputs = with python3Packages;
       [
  -      pygobject3 ipaddr libvirt libxml2 requests
  +      pygobject3 ipaddress libvirt libxml2 requests
       ];
   
     patchPhase = ''
  
positive.code:   '';
  
    postConfigure = ''
      ${python2Packages.python.interpreter} setup.py configure --prefix=$out
    '';
  
    postInstall = ''
  
negative.code: 
  with stdenv.lib;
  
  python3Packages.buildPythonApplication rec {
    name = "virt-manager-${version}";
    version = "2.0.0";
    namePrefix = "";
  
    src = fetchurl {
      url = "http://virt-manager.org/download/sources/virt-manager/${name}.tar.gz";
      sha256 = "1b48xbrx99mfiv80c60k3ydzkpcpbq57c8h8dl0gnffmnzbs8vzb";
    };
  
    nativeBuildInputs = [
  