mobile-android/build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.3.72'
    ext.retrofit_version = "2.6.2"
    ext.okhttp_version = "4.4.0"
    repositories {
        google()
        jcenter()

        maven { url 'https://maven.fabric.io/public' }
        maven { url "https://jitpack.io" }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'androidx.navigation:navigation-safe-args-gradle-plugin:2.3.0'
        // Google Services plugin
        classpath 'com.google.gms:google-services:4.3.3'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://jitpack.io' }
        maven { url "https://dl.bintray.com/mikefot/maven/" }
    }
}

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