# Internal

> Build APK using internal build system.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.0/script-reference/unityeditor.md)
* **Assembly:** UnityEditor

> **Warning:**
>
> **Removed.** Internal build system has been deprecated. Use Gradle instead
>
> **Upgrade to** [AndroidBuildSystem.Gradle](/engine/6000.0/script-reference/unityeditor/androidbuildsystem/gradle.md)

```csharp
Internal = 0
```