anchor.diff:  in
   stdenv.mkDerivation rec {
     name = "iputils-${time}";
  -  
  +
     src = fetchurl {
       url = "http://www.skbuff.net/iputils/iputils-s${time}.tar.bz2";
       sha256 = "17riqp8dh8dvx32zv3hyrghpxz6xnxa6vai9b4yc485nqngm83s5";
  
positive.code:       ln -s $out/share/man/man8/{ping,ping6}.8
        ln -s $out/share/man/man8/{tracepath,tracepath6}.8
      '';
      
    meta = {
      homepage = http://www.skbuff.net/iputils/;
      description = "A set of small useful utilities for Linux networking";
  
negative.code:     sed -i s/sgmlspl/sgmlspl.pl/ doc/Makefile
    '';
  
    makeFlags = "USE_GNUTLS=no";
  
    buildInputs = [ libsysfs openssl libcap sp docbook_sgml_dtd_31 SGMLSpm ];
  
    buildFlags = "man all ninfod";
  
  