anchor.diff:      libxml2
       glib
       openssl
  -    zchunk
       curl
       check
       gpgme
  -  ];
  +  ]
  +  # zchunk currently has issues compiling in darwin, fine in linux
  +  ++ stdenv.lib.optional stdenv.isLinux zchunk;
   
     # librepo/fastestmirror.h includes curl/curl.h, and pkg-config specfile refers to others in here
     propagatedBuildInputs = [
  
positive.code: 
    cmakeFlags = [
      "-DPYTHON_DESIRED=${stdenv.lib.substring 0 1 python.pythonVersion}"
    ];
  
    postFixup = ''
      moveToOutput "lib/${python.libPrefix}" "$py"
  
negative.code:     description = "Library providing C and Python (libcURL like) API for downloading linux repository metadata and packages";
      homepage = "https://rpm-software-management.github.io/librepo/";
      license = licenses.lgpl2Plus;
      platforms = platforms.linux ++ platforms.darwin;
      maintainers = with maintainers; [ copumpkin ];
    };
  }
  