buildscript { ext.kotlin_version = '1.3.72' ext.nav_version = "2.3.0" ext.lifecycle_version = "2.2.0" // check https://android-rebuilds.beuc.net/ for availability of free build tools ext.build_tools_version = "29.0.2" repositories { google() jcenter() } dependencies { classpath 'com.android.tools.build:gradle:4.0.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version" } } allprojects { repositories { google() jcenter() maven { url 'https://jitpack.io' } } } task clean(type: Delete) { delete rootProject.buildDir }