anchor.diff:        exponential-backoff cache bolt
       ];
       disabled = !isGo14;
  +  };
  +
  +  dropbox = buildFromGitHub {
  +    rev    = "58f839b21094d5e0af7caf613599830589233d20";
  +    owner  = "stacktic";
  +    repo   = "dropbox";
  +    sha256 = "1psmxpnn40ri9bgjvivljnd4p977f635mh3w7m5mglxxgc9392pi";
  +    propagatedBuildInputs = [ oauth2 net ];
     };
   
     cache = buildFromGitHub {
  
positive.code:     repo   = "tablewriter";
      sha256 = "0f9ph3z7lh6p6gihbl1461j9yq5qiaqxr9mzdkp512n18v89ml48";
      propagatedBuildInputs = [ mattn.go-runewidth ];
    };
  
    termbox-go = buildGoPackage rec {
  
negative.code:     };
    };
  
    ewma = buildFromGitHub {
      rev    = "2f8aa9741ab4b5b80945c750b871131b88ef5b7f";
      version = "1.0";
      owner  = "VividCortex";
      repo   = "ewma";
      sha256 = "0g1pv0zyjkriqmwc8iqv437j0f450sk8g48jycmv78ziwy7wf92h";
    };
  
    exercism = buildFromGitHub {
      rev = "v2.2.1";
      name = "exercism";
  