hyprland: fix eval failure on darwin (#426908)

  # possibility to add more adapters in the future, such as keepDebugInfo,

  # which would be controlled by the `debug` flag

  adapters = [

  # Condition on darwin to avoid breaking eval for darwin in CI,

  # even though darwin is not supported anyway.

  adapters = lib.optionals (!stdenv.targetPlatform.isDarwin) [

    stdenvAdapters.useMoldLinker

  ];