anchor.diff:    };
   
     prometheus.procfs = buildFromGitHub {
  -    rev    = "c91d8eefde16bd047416409eb56353ea84a186e4";
  -    date   = "2015-06-16";
  +    rev    = "406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8";
  +    date   = "2015-10-29";
       owner  = "prometheus";
       repo   = "procfs";
  -    sha256 = "0pj3gzw9b58l72w0rkpn03ayssglmqfmyxghhfad6mh0b49dvj3r";
  +    sha256 = "0yla9hz15pg63394ygs9iiwzsqyv29labl8p424hijwsc9z9nka8";
     };
   
     prometheus.prom2json = buildFromGitHub {
  
positive.code:   };
  
    logrus = buildFromGitHub rec {
      rev = "v0.8.6";
      owner = "Sirupsen";
      repo = "logrus";
      sha256 = "1v2qcjy6w24jgdm7kk0f8lqpa25qxzll2x6ycqwidd3pzjhrkifa";
      propagatedBuildInputs = [ airbrake-go bugsnag-go raven-go ];
    };
  
    logutils = buildFromGitHub {
  
negative.code:     sha256 = "11zxd45rvjm6cn3wzbi18wy9j4vr1r1hgg6gzlqnxffiizkycxmz";
    };
  
    pb = buildFromGitHub {
      rev    = "e648e12b78cedf14ebb2fc1855033f07b034cfbb";
      owner  = "cheggaaa";
  