Error:A problem occurred configuring root project '2. Full Source Code'.

> 
> Could not resolve all dependencies for configuration ':classpath'.
>  Could not resolve com.android.tools.build:gradle-core:2.0.0-alpha9.
>  Required by:
>  project : > com.android.tools.build:gradle:2.0.0-alpha9
>  Could not resolve com.android.tools.build:gradle-core:2.0.0-alpha9.
>  inconsistent module metadata found. Descriptor: com.android.tools.build:gradle:2.0.0-alpha9 Errors: bad module name: expected='gradle-core' found='gradle'
> 
> 
> 

**build.gradle**

```
buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.0.0-alpha9'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        mavenCentral()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

```