build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply from: "config.gradle"
buildscript {
    ext {
        kotlin_version = '1.3.61'
    }
    repositories {
        google()
        mavenCentral() // add repository
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        maven { url 'https://jitpack.io' }
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.0'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' // add plugin
        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.30'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral() // add repository
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        maven { url 'https://jitpack.io' }
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}