build.gradle 文件中的 compileKotlin 块抛出错误找不到参数的方法 compileKotlin() [...]

I'm trying to configure Kotlin to work with Java 1.8 in my Android project. I've tried adding the compileKotlin block at the bottom of my build.gradle file, but I get an error if I do so.

The error that occurs is the following:

错误:(38，0)找不到参数的方法compileKotlin()

The project runs fine without this block. What am I missing? Here's the complete build.gradle file, it's pretty basic stuff:

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'


android {
    compileSdkVersion 25
    buildToolsVersion '25.0.2'


    defaultConfig {
        minSdkVersion 24
        targetSdkVersion 25
        versionCode 1
        versionName '1.0.0'

        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    compile 'com.google.android.support:wearable:2.0.2'
}

repositories {
    mavenCentral()
}

compileKotlin {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8

    kotlinOptions {
        jvmTarget = '1.8'
        apiVersion = '1.1'
        languageVersion = '1.1'
    }
}