Advertencia: Advertencia: Versión de origen compatible 'RELEASE_7' del procesador de anotaciones 'android.arch.lifecycle.LifecycleProcessor' less than -source '1.8'

Tratar de construir una muestra utilizando Android Studio 3 Canary 5 con componentes de arquitectura y Kotlin da esta advertencia.

¿Puede alguien decirme la razón?

Gracias, Ove

Editar # 1: Esta es una muestra hecha hace algún tiempo por Dan Lew

Https://github.com/dlew/android-architecture-counter-sample

Build.gradle:

apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' android { compileSdkVersion 25 buildToolsVersion rootProject.ext.buildToolsVersion defaultConfig { applicationId "net.danlew.counter" minSdkVersion 23 targetSdkVersion 25 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}" compile "com.android.support:recyclerview-v7:${rootProject.ext.supportLibVersion}" compile "com.android.support:design:${rootProject.ext.supportLibVersion}" compile "com.android.support:cardview-v7:${rootProject.ext.supportLibVersion}" compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' compile "android.arch.lifecycle:extensions:${rootProject.archLifecycleVersion}" compile "android.arch.persistence.room:runtime:${rootProject.archRoomVersion}" compile "android.arch.persistence.room:rxjava2:${rootProject.archRoomVersion}" kapt "android.arch.lifecycle:compiler:${rootProject.archLifecycleVersion}" kapt "android.arch.persistence.room:compiler:${rootProject.archRoomVersion}" compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version" String butterKnifeVersion = '8.5.1' compile "com.jakewharton:butterknife:$butterKnifeVersion" kapt "com.jakewharton:butterknife-compiler:$butterKnifeVersion" compile 'io.reactivex.rxjava2:rxjava:2.1.0' String daggerVersion = '2.10' compile "com.google.dagger:dagger:$daggerVersion" kapt "com.google.dagger:dagger-compiler:$daggerVersion" String rxBindingVersion = '2.0.0' compile "com.jakewharton.rxbinding2:rxbinding:$rxBindingVersion" compile "com.jakewharton.rxbinding2:rxbinding-kotlin:$rxBindingVersion" compile 'com.jakewharton.timber:timber:4.5.1' compile 'com.jakewharton.rxrelay2:rxrelay:2.0.0' } repositories { mavenCentral() } 

FlipAndroid es un fan de Google para Android, Todo sobre Android Phones, Android Wear, Android Dev y Aplicaciones para Android Aplicaciones.