anchor.diff:      spdlog
       boost17x
       openssl
  -    zlib
  -    libsodium
       olm
     ];
   
  
positive.code:     description = "Client API library for Matrix, built on top of Boost.Asio";
      homepage = "https://github.com/Nheko-Reborn/mtxclient";
      license = licenses.mit;
      maintainers = with maintainers; [ fpletz ];
      platforms = platforms.all;
      # Should be fixable if a higher clang version is used, see:
      # https://github.com/NixOS/nixpkgs/pull/85922#issuecomment-619287177
  
negative.code: , pkg-config
  , boost17x
  , openssl
  , olm
  , spdlog
  , nlohmann_json
  