anchor.diff:  
     docker = buildFromGitHub {
       version = 2;
  -    rev = "1fb9c4e89188f48c79889f6128fdec865bed467d";
  +    rev = "cc8b8ce0b3d2d6b3345687464d3a3b1c2c4971ef";
       owner = "docker";
       repo = "docker";
  -    sha256 = "1p7h3rqr0jdm9qpxwfpcncz8x8vwbiwb1k3sfa3kzg1vw6vf4za8";
  +    sha256 = "0yf98nbb0kkw2n2f0z7yrbaccg1fi2pvlssvsfdd4sr25cyi09jl";
       meta.useUnstable = true;
  -    date = "2016-10-29";
  +    date = "2016-11-01";
     };
   
     docker_for_runc = buildFromGitHub {
  
positive.code: 
    prometheus = buildFromGitHub {
      version = 2;
      rev = "v1.2.1";
      owner  = "prometheus";
      repo   = "prometheus";
      sha256 = "07iag641z750adcci93pj7fywirygqyzwlifn3p70c9cy1hjqi7j";
      buildInputs = [
        aws-sdk-go
        azure-sdk-for-go
  
negative.code: 
    mitchellh_cli = buildFromGitHub {
      version = 2;
      date = "2016-10-29";
      rev = "fa17b36f6c61f1ddbbb08c9f6fde94b3c065a09d";
      owner = "mitchellh";
      repo = "cli";
      sha256 = "1xjh016f6qfjdw4m89i97l8hqkrfcblyx5miw6x12as4f7mkddzz";
      propagatedBuildInputs = [ crypto go-radix speakeasy go-isatty ];
    };
  
  