anchor.diff:    };
   
     goleveldb = buildFromGitHub {
  -    rev = "1a9d62f03ea92815b46fcaab357cfd4df264b1a0";
  -    date = "2015-08-19";
  +    rev = "36d2ead1e477af53df038bdde5f7b5b3790c93dd";
  +    date = "2016-02-01";
       owner = "syndtr";
       repo = "goleveldb";
  -    sha256 = "04ywbif36fiah4fw0x2abr5q3p4fdhi6q57d5icc2mz03q889vhb";
  +    sha256 = "1h7cm1lrd3y4s70flsnjwv553qrjklnkwrii866ygd1q5jdfi80s";
       propagatedBuildInputs = [ ginkgo gomega snappy ];
     };
   
  
positive.code:   };
  
    rcrowley_go-metrics = buildFromGitHub {
      rev = "7839c01b09d2b1d7068034e5fe6e423f6ac5be22";
      date = "2015-11-29";
      owner = "rcrowley";
      repo = "go-metrics";
      sha256 = "1lx8zr9yl29h9agph3vwrx99398x3qi35fy1g0ys02ifxbxikx2i";
      propagatedBuildInputs = [ stathat ];
    };
  
  
negative.code:   };
  
    stathat = buildFromGitHub {
      date = "2016-01-26";
      rev = "cf69b0bcb80478755dc0ea1120b36000e35dcbbb";
      owner = "stathat";
      repo = "go";
      sha256 = "15pzhn5mxlbcamldkqh6z160ijrg1h9r5qlsrfi3cqdxhhr3c19s";
    };
  
    statos = buildFromGitHub {
  