build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply from: 'dependencies.gradle'
buildscript {
    ext.kotlin_version = '1.2.21'
    ext.anko_version = '0.8.2'
    repositories {

        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'

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

        //retrolambda
        classpath 'me.tatarka:gradle-retrolambda:3.2.4'

        //dagger2
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
    }
}
allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
        google()
    }
}

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