The [new vector assets](http://android-developers.blogspot.co.uk/2015/09/android-studio-14.html) in Android Studio 1.4 requires the Android Studio Gradle Plugin version 1.4.0-beta3 or later. [This page](http://tools.android.com/tech-docs/new-build-system) says they are up to 1.5.0-beta1.

But when I enable that in my `build.gradle` file I get this error:

```
Error:Could not find com.android.tools.build:gradle:1.4.0-beta6.
Searched in the following locations:
    file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/android/tools/build/gradle/1.4.0-beta6/gradle-1.4.0-beta6.pom
    file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/android/tools/build/gradle/1.4.0-beta6/gradle-1.4.0-beta6.jar
    https://repo1.maven.org/maven2/com/android/tools/build/gradle/1.4.0-beta6/gradle-1.4.0-beta6.pom
    https://repo1.maven.org/maven2/com/android/tools/build/gradle/1.4.0-beta6/gradle-1.4.0-beta6.jar
Required by:
    :AndroidBackgroundSync:unspecified

```

Indeed if you check [that URL](https://repo1.maven.org/maven2/com/android/tools/build/gradle/) it only goes up to 1.3.1.

How can I actually use this thing?