anchor.diff:    src = fetchgit {
       url = "https://github.com/cjdelisle/cjdns.git";
       inherit rev;
  -    sha256 = "519c549c42ae26c5359ae13a4548c44b51e36db403964b4d9f78c19b749dfb83";
  +    sha256 = "e9fa82f3495b718cebd4d1836312b224c6689dc521fba093ad1accf2d2e15ff1";
     };
   
     buildInputs = [ which python27 nodejs];
  
positive.code: { stdenv, fetchgit, nodejs, which, python27 }:
  
  let
    date = "20140829";
    rev = "9595d67f9edd759054c5bd3aaee0968ff55e361a";
  in
  stdenv.mkDerivation {
    name = "cjdns-${date}-${stdenv.lib.strings.substring 0 7 rev}";
  
negative.code:   patches = [ ./makekey.patch ];
  
    buildPhase = "bash do";
    installPhase = "installBin cjdroute makekey";
  
    meta = {
      homepage = https://github.com/cjdelisle/cjdns;
  