buildscript { ext.kotlin_version = '1.2.40' repositories { google() jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.1.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" } } allprojects { repositories { google() jcenter() } } rootProject.buildDir = '../build' subprojects { project.buildDir = "${rootProject.buildDir}/${project.name}" project.evaluationDependsOn(':app') } task clean(type: Delete) { delete rootProject.buildDir } task wrapper(type: Wrapper) { gradleVersion = '2.14.1' }