anchor.diff:      sha256 = "0s1qq3k5mpcs9i7ng0l9fvr1f75abpbzfi1jaf3zpzbs1dz50dlx";
     };
   
  -  buildInputs = [ libevent ];
  +  buildInputs = [ libevent libtirpc ];
   
     preConfigure = ''
       sed -i 's|libevent.a|libevent.so|' configure
  
positive.code: { stdenv, fetchurl, libevent }:
  
  stdenv.mkDerivation rec {
    name = "trickle-1.07";
  
negative.code:     sed -i '/#define in_addr_t/ s:^://:' config.h
    '';
  
    NIX_LDFLAGS = [ "-levent" "-ltirpc" ];
    NIX_CFLAGS_COMPILE = [ "-I${libtirpc.dev}/include/tirpc" ];
  
    configureFlags = [ "--with-libevent" ];
  
  