anchor.diff:  
     rollinghash = buildFromGitHub {
       version = 2;
  -    rev = "v2.0.1";
  +    rev = "v2.0.2";
       owner  = "chmduquesne";
       repo   = "rollinghash";
  -    sha256 = "1r23hn8hqaaggqrj3nhwfaiin72majsfr7vlyw2xhrw4wpy5qyin";
  +    sha256 = "1krn9jjsjl8c1w09p8qyn3hfrgdbc3a465jzv6a6399fylxhgipf";
     };
   
     roundtrip = buildFromGitHub {
  
positive.code: 
    aws-sdk-go = buildFromGitHub {
      version = 2;
      rev = "v1.6.10";
      owner  = "aws";
      repo   = "aws-sdk-go";
      sha256 = "02an1jn33qw7i0hh469hyf03qwav9fx1y0zavvy7smmvm0c9js42";
      excludedPackages = "\\(awstesting\\|example\\)";
      buildInputs = [
        tools
  
negative.code:     version = 2;
      owner = "minio";
      repo = "mc";
      rev = "6b2e63e66cb66b749645d6d56664672d74d963df";
      sha256 = "1fi8h870b57sks9g2s8mmbi22a4dvjhj9im9pfbl8il7b9nk9dvw";
      propagatedBuildInputs = [
        cli_minio
        color
  