// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { ext.kotlin_version = '1.1.4' repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.0.0' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" } } allprojects { repositories { jcenter() maven { url 'https://maven.google.com' } } } task clean(type: Delete) { delete rootProject.buildDir }