val kotlin_version by extra("1.3.21") buildscript { var kotlin_version: String by extra kotlin_version = "1.3.30" repositories { google() jcenter() } dependencies { classpath("com.android.tools.build:gradle:3.3.2") classpath(kotlin("gradle-plugin", version = "1.3.21")) } } allprojects { repositories { google() jcenter() } }