anchor.diff:      vala
       gettext
       perl # for pod2man
  +    python3
     ];
   
     buildInputs = [
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "gtk-vnc";
    version = "1.2.0";
  
    outputs = [ "out" "bin" "man" "dev" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "0jmr6igyzcj2wmx5v5ywaazvdz3hx6a6rys26yb4l4s71l281bvs";
    };
  
    nativeBuildInputs = [
  
negative.code: , vala
  , gettext
  , perl
  , python3
  , gnome
  , gdk-pixbuf
  , zlib
  