anchor.diff:  { stdenv, fetchgit, nodejs, which, python27 }:
   
   let
  -  date = "20140829";
  -  rev = "9595d67f9edd759054c5bd3aaee0968ff55e361a";
  +  date = "20140919";
  +  rev = "e9bcb0f9f06870d6f4904149e1c15eca09c7ed8a";
   in
   stdenv.mkDerivation {
     name = "cjdns-${date}-${stdenv.lib.strings.substring 0 7 rev}";
  
positive.code:   patches = [ ./makekey.patch ];
  
    buildPhase = "bash do";
    installPhase = ''
      mkdir -p $out/sbin
      cp cjdroute makekey $out/sbin
    '';
  
    meta = {
      homepage = https://github.com/cjdelisle/cjdns;
  
negative.code:   src = fetchgit {
      url = "https://github.com/cjdelisle/cjdns.git";
      inherit rev;
      sha256 = "e9fa82f3495b718cebd4d1836312b224c6689dc521fba093ad1accf2d2e15ff1";
    };
  
    buildInputs = [ which python27 nodejs];
  