# ReferencesOptions

> Options to control the Unity References to other assembly definition files that Unity uses during compilation.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEditor.Compilation](/engine/6000.6/script-reference/unityeditor/compilation.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
[Flags]
public enum ReferencesOptions
```

## Remarks

Additional Resources: [AssemblyBuilder.referencesOptions](/engine/6000.6/script-reference/unityeditor/compilation/assemblybuilder/referencesoptions.md).

## Fields

| Value                                                                                                             | Description                             |
| ----------------------------------------------------------------------------------------------------------------- | --------------------------------------- |
| [None](/engine/6000.6/script-reference/unityeditor/compilation/referencesoptions/none.md)                         | Default options.                        |
| [UseEngineModules](/engine/6000.6/script-reference/unityeditor/compilation/referencesoptions/useenginemodules.md) | Use UnityEngine modules when compiling. |