anchor.diff:      ];
     };
   
  +  fwd = buildFromGitHub {
  +    version = 2;
  +    date = "2016-01-28";
  +    rev = "98c11a7a6ec829d672b03833c3d69a7fae1ca972";
  +    owner  = "philhofer";
  +    repo   = "fwd";
  +    sha256 = "15wamyn4xfxvdnf6d2figrl8my1lm00n49m6l3qxdxcdkfa69qnv";
  +  };
  +
     gabs = buildFromGitHub {
       version = 2;
       owner = "Jeffail";
  
positive.code:     owner = "couchbase";
      repo = "cbauth";
      sha256 = "185c10ab80cn4jxdp915h428lm0r9zf1cqrfsjs71im3w3ankvsn";
    };
  
    check = buildFromGitHub {
  
negative.code: 
    btree = buildFromGitHub {
      version = 2;
      rev = "316fb6d3f031ae8f4d457c6c5186b9e3ded70435";
      owner  = "google";
      repo   = "btree";
      sha256 = "1wjicavprwxpa0rmvc8wz6k0gxl2q4rpsg7ci5hjvkb2j56r4rwk";
      date = "2016-12-17";
    };
  
    bufio_v1 = buildFromGitHub {
  