anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "yate";
  -  version = "6.1.0-1";
  +  version = "6.4.0-1";
   
     src = fetchurl {
       url = "http://voip.null.ro/tarballs/yate${lib.versions.major version}/${pname}-${version}.tar.gz";
  -    sha256 = "0xx3i997nsf2wzbv6m5n6adsym0qhgc6xg4rsv0fwqrgisf5327d";
  +    hash = "sha256-jCPca/+/jUeNs6hZZLUBl3HI9sms9SIPNGVRanSKA7A=";
     };
   
     # TODO zaptel ? postgres ?
  
positive.code:   buildInputs = [ qt4 openssl ];
  
    # /dev/null is used when linking which is a impure path for the wrapper
    preConfigure =
      ''
        sed -i 's@,/dev/null@@' configure
        patchShebangs configure
      '';
  
    # --unresolved-symbols=ignore-in-shared-libs makes ld no longer find --library=yate? Why?
    preBuild =
  
negative.code:     homepage = "http://yate.null.ro/";
      # Yate's license is GPL with an exception for linking with
      # OpenH323 and PWlib (licensed under MPL).
      license = lib.licenses.gpl2Only;
      maintainers = [ lib.maintainers.marcweber ];
      platforms = [ "i686-linux" "x86_64-linux" ];
    };
  