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: 
  with stdenv.lib;
  
  python2Packages.buildPythonApplication rec {
    name = "virt-manager-${version}";
    version = "1.5.1";
    namePrefix = "";
  
    src = fetchurl {
      url = "http://virt-manager.org/download/sources/virt-manager/${name}.tar.gz";
      sha256 = "1ardmd4sxdmd57y7qpka44gf09c1yq2g0xs074d3k1h925crv27f";
    };
  
    nativeBuildInputs = [
  
negative.code: { stdenv, fetchurl, python3Packages, intltool, file
  , wrapGAppsHook, gtk-vnc, vte, avahi, dconf
  , gobjectIntrospection, libvirt-glib, system-libvirt
  , gsettings-desktop-schemas, glib, libosinfo, gnome3, gtk3
  