anchor.diff:  { stdenv, fetchurl, openssl, libtool, perl, libxml2 }:
   
  -let version = "9.9.2"; in
  +let version = "9.9.2-P2"; in
   
   stdenv.mkDerivation rec {
   
  
positive.code: 
    src = fetchurl {
      url = "http://ftp.isc.org/isc/bind9/${version}/${name}.tar.gz";
      sha256 = "0j4v01ch4xkgnsnngmh6bpapzi53n4k79gbbhmxf44nmk2qk0rby";
    };
  
    patchPhase = ''
  
negative.code:     "--localstatedir=/var" ];
  
    meta = {
      homepage = "http://www.isc.org/software/bind";
      description = "ISC BIND: a domain name server";
  
      maintainers = with stdenv.lib.maintainers; [viric simons];
      platforms = with stdenv.lib.platforms; linux;
    };
  }
  