anchor.diff:  
     dns = buildFromGitHub {
       version = 3;
  -    rev = "fb6fbed0f5ec4e418de4f156c18d2e4f9bc854e7";
  -    date = "2017-06-02";
  +    rev = "e78414ef75607394ad7d917824f07f381df2eafa";
  +    date = "2017-06-04";
       owner  = "miekg";
       repo   = "dns";
  -    sha256 = "0ni5ck8f6kx69kxjv75mcfhlfgcmwf0vd10riprzb3nb2rxzlkhy";
  +    sha256 = "12nw76hgrqzp0500yj704liv43kn39cxaks7cvgf3skc27c23ljl";
     };
   
     dnsimple-go = buildFromGitHub {
  
positive.code: 
    ini = buildFromGitHub {
      version = 3;
      rev = "v1.27.2";
      owner  = "go-ini";
      repo   = "ini";
      sha256 = "04ax161nzzp76shfpvrwr8qa8cz5rhs01a2x9v13p15r3fznc14s";
    };
  
    ini_v1 = buildFromGitHub {
  
negative.code: 
    aws-sdk-go = buildFromGitHub {
      version = 3;
      rev = "v1.8.36";
      owner  = "aws";
      repo   = "aws-sdk-go";
      sha256 = "0jc9yjkvy0rskkcskia7a56kprfr4v2g38w8b30y367fg6z8ib7y";
      excludedPackages = "\\(awstesting\\|example\\)";
      buildInputs = [
        tools
  