anchor.diff:  
     roaring = buildFromGitHub {
       version = 2;
  -    rev = "v0.3.0";
  +    rev = "v0.3.1";
       owner  = "RoaringBitmap";
       repo   = "roaring";
  -    sha256 = "0hjzbwaqm0vqv8fi9am1spkilfaqgzvhiasdjpmz4nhi95if0jzs";
  +    sha256 = "1859c4p12vqsp03k1pvb1056f279sdf52hhjh1ny7wy26rgv0prp";
       propagatedBuildInputs = [
         go-unsnap-stream
         msgp
  
positive.code:   };
  
    raw = buildFromGitHub {
      version = 1;
      rev = "724aedf6e1a5d8971aafec384b6bde3d5608fba4";
      owner  = "feyeleanor";
      repo   = "raw";
      sha256 = "0pkvvvln5cyyy0y2i82jv39gjnfgzpb5ih94iav404lfsachh8m1";
      date = "2013-03-27";
    };
  
    rclone = buildFromGitHub {
  
negative.code: 
    go-github = buildFromGitHub {
      version = 2;
      date = "2016-12-02";
      rev = "7edde482875504b49769ad097eab7c572547ff21";
      owner = "google";
      repo = "go-github";
      sha256 = "0s5yn1n74vr1fyzapjq6qzk0q27v3sr4hyxv8nf8ychdp2fybvp4";
      buildInputs = [ oauth2 ];
      propagatedBuildInputs = [ go-querystring ];
    };
  