[Types](https://nixos.org/manual/nixos/stable/#sec-option-types)
[[Delayed conditionals]]

---

```nix
{
  options = {
    name = mkOption {
      type = type specification;
      default = default value;
      example = example value;
      description = "Description for use in the NixOS manual.";
    };
  };
}
```

# Utility functions
`mkEnableOption "what"` -> a bool opt with a desc like: "Whether to enable what".