# engineLibrary

> The _role value of the main Unity runtime when it is built as a separate library.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Build.Reporting](/engine/6000.7/script-reference/unityeditor/build/reporting.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public static string engineLibrary { get; }
```

### Remarks

On most platforms, the Unity runtime is also the main executable for the player, but on some platforms it is split into a separate file, allowing the main executable to be smaller and more easily customized.