App's build.gradle for Kotlin

build.gradle

apply plugin: 'kotlin-android'

android {
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
}

// NOTICE: dependencies are fixed for build stability
dependencies {
    // Kotlin STD Library
    compile 'org.jetbrains.kotlin:kotlin-stdlib:0.10.195'
}