anchor.diff:          be the only driver there.
   
           If this is enabled, then the bus IDs of the NVIDIA and Intel GPUs have to be
  -        specified (<option>hardware.nvidia.prime.sync.nvidiaBusId</option> and
  -        <option>hardware.nvidia.prime.sync.intelBusId</option>).
  +        specified (<option>hardware.nvidia.prime.nvidiaBusId</option> and
  +        <option>hardware.nvidia.prime.intelBusId</option>).
   
           If you enable this, you may want to also enable kernel modesetting for the
           NVIDIA driver (<option>hardware.nvidia.modesetting.enable</option>) in order
  
positive.code:       '';
      };
  
      hardware.nvidia.prime.sync.enable = mkOption {
        type = types.bool;
        default = false;
  
negative.code:       modules = [ nvidia_x11.bin ];
        deviceSection = optionalString syncCfg.enable
          ''
            BusID "${pCfg.nvidiaBusId}"
            ${optionalString syncCfg.allowExternalGpu "Option \"AllowExternalGpus\""}
          '';
        screenSection =
  