anchor.diff:      version = 3;
       owner = "cpuguy83";
       repo = "go-md2man";
  -    rev = "v1.0.7";
  -    sha256 = "0inhyhb0ia3d018nq5lgayk9r0qa2x3g5wpsr7z0rh7sra1jiaks";
  +    rev = "1d903dcb749992f3741d744c0f8376b4bd7eb3e1";
  +    sha256 = "0l5fl6c8g5dnwklp8q6qp2n2s8r1zj7ssbw5h9k809nl82irbssi";
       propagatedBuildInputs = [
         blackfriday
       ];
  +    meta.useUnstable = true;
  +    date = "2017-08-27";
     };
   
     go-memdb = buildFromGitHub {
  
positive.code:       viper
        yaml_v2
      ];
    };
  
    cockroach-go = buildFromGitHub {
  
negative.code: 
    goorgeous = buildFromGitHub {
      version = 3;
      rev = "dcf1ef873b8987bf12596fe6951c48347986eb2f";
      owner = "chaseadamsio";
      repo = "goorgeous";
      sha256 = "012d2j1gxzw4d1vkmbf85gy66v1ynd7mvagfick5h6b32c8mgsz1";
      propagatedBuildInputs = [
        blackfriday
        sanitized-anchor-name
      ];
      meta.useUnstable = true;
      date = "2017-11-26";
    };
  
    gopass = buildFromGitHub {
  