anchor.diff:  
     meta = with stdenv.lib; {
       description = "Print, scan and fax HP drivers for Linux";
  -    homepage = http://hplipopensource.com/;
  +    homepage = https://developers.hp.com/hp-linux-imaging-and-printing;
       license = if withPlugin
         then licenses.unfree
         else with licenses; [ mit bsd2 gpl2Plus ];
  
positive.code: let
  
    name = "hplip-${version}";
    version = "3.17.10";
  
    src = fetchurl {
      url = "mirror://sourceforge/hplip/${name}.tar.gz";
      sha256 = "0v27hg856b5z2rilczcbfgz8ksxn0n810g1glac3mxkj8qbl8wqg";
    };
  
    plugin = fetchurl {
      url = "http://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/${name}-plugin.run";
      sha256 = "07am3dnl0ipgfswz5wndprryljh9rqbfhq7mm4d4yyj3bdnnzlig";
    };
  
    hplipState = substituteAll {
  
negative.code:     dbus
      net_snmp
      openssl
      zlib
    ];
  
    nativeBuildInputs = [
  