anchor.diff:    };
   
     urlesc = buildFromGitHub {
  -    version = 2;
  +    version = 3;
       owner = "PuerkitoBio";
       repo = "urlesc";
  -    rev = "bbf7a2afc14f93e1e0a5c06df524fbd75e5031e5";
  +    rev = "de5bf2ad457846296e2031421a34e2568e304e35";
       sate = "2015-02-08";
  -    sha256 = "0rmcdn7z2rvms4j3pjbwbydffgl4s9igcjcfyin47sss0ywf6pmd";
  -    date = "2017-03-24";
  +    sha256 = "0q4m7vhh0bxcj2r6di0f19g7zzgx6sq2m4nrb3p9ds19gbbyg099";
  +    date = "2017-08-10";
     };
   
     usage-client = buildFromGitHub {
  
positive.code: 
    pq = buildFromGitHub {
      version = 3;
      rev = "dd1fe2071026ce53f36a39112e645b4d4f5793a4";
      owner  = "lib";
      repo   = "pq";
      sha256 = "1xa8c9snk6mld3mchg4qcmp5kl0jry4lfj4w82cgrl0g0vjw9n9w";
      date = "2017-07-07";
    };
  
    probing = buildFromGitHub {
  
negative.code:       mapstructure
      ];
      meta.useUnstable = true;
      date = "2017-08-10";
    };
  
    consul-template = buildFromGitHub {
  