buildscript { ext{ kotlin_version = '1.5.20' nav_version = "2.4.0-alpha04" } repositories { google() mavenCentral() } dependencies { classpath 'com.android.tools.build:gradle:4.2.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version" } } allprojects { repositories { google() mavenCentral() maven { url 'https://jitpack.io' } } } task clean(type: Delete) { delete rootProject.buildDir }