buildscript {
    ext.kotlin_version = '1.1.0-beta-38'
    repositories {
        jcenter()
        maven { url '<http://dl.bintray.com/kotlin/kotlin-eap-1.1>' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url '<http://dl.bintray.com/kotlin/kotlin-eap-1.1>' }
    }
}

in top level build.gradle.