buildscript { ext.kotlin_version = '1.5.10' repositories { //google() mavenCentral() } dependencies { //classpath 'com.android.tools.build:gradle:3.6.4' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" } } allprojects { repositories { //google() mavenCentral() } } task clean(type: Delete) { delete rootProject.buildDir }