anchor.diff:  { stdenv
   , autoreconfHook
   , fetchFromGitHub
  +, lib
   
   , curl
   , expat
  
positive.code:     "--enable-s3"
    ];
  
    meta = with stdenv.lib; {
      maintainers = with maintainers; [
        wkennington
      ];
  
negative.code:     owner = "sshock";
      repo = "AFFLIBv3";
      rev = "v${version}";
      sha256 = "75445be21a4b6c3d0c0198f05f1305dec85f54682f40a480bb874093965974e3";
    };
  
    nativeBuildInputs = [
      autoreconfHook
    ];
  
    buildInputs = [
      curl
      expat
  