buildSrc/build.gradle.kts

plugins {
    `kotlin-dsl`
}

buildscript {
    extra["kotlinVersion"] = "1.2.0"
    val kotlinVersion: String by extra

    repositories {
        mavenCentral()
        jcenter()
    }

    dependencies {
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
    }
}

val kotlinVersion: String by extra

repositories {
    mavenCentral()
}

dependencies {
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion")
}