Gradleを使用したAndroidビルドの別の依存関係プロジェクトを含めると、「プロジェクトを解決できませんでした」というエラーが発生します

GradleにAndroidプロジェクトの依存関係を認識させることができないようです。私はこれを最小限に抑えることができましたが、それでもエラーが発生します。

単純なライブラリの依存関係を別のプロジェクトに含めるにはどうすればよいですか？

これはフォルダ構造が非常に単純です：

 - build.gradle
 - settings.gradle
 + myproject
   - build.gradle
 + mylibrary
   - build.gradle

エラーは「プロジェクトを解決できませんでした」/「プロジェクトの一致するバリアントが見つかりません」です

command: gradle build

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':mylibrary:preReleaseBuild'.
> Could not resolve all task dependencies for configuration ':mylibrary:releaseRuntimeClasspath'.
> Could not resolve project :mylibrary.
    Required by:
        project :mylibrary
    > Unable to find a matching variant of project :mylibrary:
        - Variant 'debugApiElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found incompatible value 'debug'.
            - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
            - Required org.gradle.usage 'java-runtime' and found incompatible value 'java-api'.
        - Variant 'debugBundleElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' but no value provided.
            - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
            - Required org.gradle.usage 'java-runtime' and found incompatible value 'android-bundle'.
        - Variant 'debugMetadataElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found incompatible value 'debug'.
            - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
            - Required org.gradle.usage 'java-runtime' but no value provided.
        - Variant 'debugRuntimeElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found incompatible value 'debug'.
            - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
            - Required org.gradle.usage 'java-runtime' and found compatible value 'java-runtime'.
        - Variant 'releaseApiElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
            - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
            - Required org.gradle.usage 'java-runtime' and found incompatible value 'java-api'.
        - Variant 'releaseBundleElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' but no value provided.
            - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
            - Required org.gradle.usage 'java-runtime' and found incompatible value 'android-bundle'.
        - Variant 'releaseMetadataElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
            - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
            - Required org.gradle.usage 'java-runtime' but no value provided.
        - Variant 'releaseRuntimeElements' capability gradle-test2:mylibrary:unspecified:
            - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
            - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
            - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
            - Required org.gradle.usage 'java-runtime' and found compatible value 'java-runtime'.

私のファイルの内容は次のとおりです。

./build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.2'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

ext {
    compileSdkVersion = 28
    buildToolsVersion = '28.0.3'
    supportLibVersion = '28.0.0'
    applicationId = 'com.example'
    minSdkVersion = 16
    targetSdkVersion = 26
    versionCode = 1
    versionName = '1.0'
}

./settings.gradle

include ':myproject', ':mylibrary'

./myproject/build.gradle

apply plugin: 'android'

repositories {
    mavenCentral()
}

dependencies {
    implementation project(':mylibrary')
}

android {

    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId rootProject.ext.applicationId
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode rootProject.ext.versionCode
        versionName rootProject.ext.versionName
    }

    buildTypes {
        release {}
        debug {}
    }
}

./mylibrary/build.gradle

apply plugin: 'android'

repositories {
    mavenCentral()
}

dependencies {
}

android {

    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId rootProject.ext.applicationId + ".mylibrary"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode rootProject.ext.versionCode
        versionName rootProject.ext.versionName
    }

    buildTypes {
        release {}
        debug {}
    }
}