anchor.diff:      };
   
       hardware.nvidia.prime.nvidiaBusId = mkOption {
  -      type = types.str;
  +      type = types.strMatching "[[:print:]]+\:[0-9]{1,3}\:[0-9]{1,2}\:[0-9]";
         default = "";
         example = "PCI:1:0:0";
         description = ''
  
positive.code:     };
  
      hardware.nvidia.prime.amdgpuBusId = mkOption {
        type = types.str;
        default = "";
        example = "PCI:4:0:0";
        description = ''
  
negative.code:     };
  
      hardware.nvidia.prime.intelBusId = mkOption {
        type = types.strMatching "[[:print:]]+\:[0-9]{1,3}\:[0-9]{1,2}\:[0-9]";
        default = "";
        example = "PCI:0:2:0";
        description = ''
  