Я пытаюсь заставить Трэвиса построить мой проект Android. Не удается, когда он пытается загрузить библиотеку дляConstraintLayout, Вы знаете, что я должен сделать, чтобы это сработало?

мой.travis.yml это:

language: android
jdk:
  - oraclejdk8
android:
  components:
    - platform-tools
    - tools
    - build-tools-23.0.2
    - android-23
    - extra-android-support
    - extra-android-m2repository
    - extra-google-m2repository

мойbuild.gradle является:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    defaultConfig {
        applicationId "my.example.bdd"
        minSdkVersion 9
        targetSdkVersion 23
        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'])
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha2'
    testCompile 'junit:junit:4.12'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
    androidTestCompile 'com.android.support.test:runner:0.5'
    androidTestCompile 'com.android.support:support-annotations:23.4.0'
}

И ошибка, которую я получаю на Трэвисе:

FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugApk'.
   > Could not find com.android.support.constraint:constraint-layout:1.0.0-alpha2.
     Searched in the following locations:
         https://jcenter.bintray.com/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         https://jcenter.bintray.com/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar
         file:/usr/local/android-sdk/extras/android/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         file:/usr/local/android-sdk/extras/android/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar
         file:/usr/local/android-sdk/extras/google/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         file:/usr/local/android-sdk/extras/google/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar

Есть идеи как это исправить? Можно ли даже построитьConstraintLayout с Трэвисом?