anchor.diff:    installPhase = ''
       runHook 'preInstall'
     '' +
  -    /* iputils does not provide a make install target */ ''
  +  /* iputils does not provide a make install target */ ''
       install -vDm 755 ping $out/bin/ping
       install -vDm 755 ping6 $out/bin/ping6
       install -vDm 755 tracepath $out/bin/tracepath
  
positive.code:   ];
  
    postPatch =
      /* Fix expected filename */ ''
      sed -i doc/Makefile \
        -e 's/sgmlspl/sgmlspl.pl/'
    '';
  
negative.code:     runHook 'postInstall'
    '';
  
    parallelBuild = false;
  
    meta = with stdenv.lib; {
      description = "Network monitoring tools including ping and ping6";
  