unmock-plugin: "Error in opening zip file" when including the plugin twice

I am working on an Android project which uses Git as the version control system. Parts of the code are maintained in a Git submodule named commons in order to being used by other application projects as well. The commons submodule as well as the application module contain unit tests. In the past, I added the unmock-plugin version 0.5.0 in the commons submodule for being used by a subset of the tests. Tests in the commons submodule pass.

.
├── commons
│   ├── build.gradle // has the unmock-plugin
│   └── src
├── app
│   ├── build.gradle
│   ├── src

// commons submodule build.gradle

buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath "de.mobilej.unmock:UnMockPlugin:0.5.0"
    }
}

apply plugin: 'com.android.library'
apply plugin: 'de.mobilej.unmock'

android { /* ... */ }

unMock {
    keep "android.database.DatabaseUtils"
    keepStartingWith "android.text."
    keepStartingWith "com.android.internal.util."
    keepStartingWith "org.ccil.cowan.tagsoup."
}

Now, I want to reference the unmock-plugin in the application module as well since a subset of test there also require mocking parts of the Android framework.

.
├── commons
│   ├── build.gradle // has the unmock-plugin
│   └── src
├── app
│   ├── build.gradle // has the unmock-plugin
│   ├── src

// application module build.gradle

buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath "de.mobilej.unmock:UnMockPlugin:0.5.0"
    }
}

apply plugin: 'com.android.application'
apply plugin: 'de.mobilej.unmock'

android { /* ... */ }

unMock {
    keep "android.net.Uri"
}

Shell / Jenkins

Running the tests of the application module fails with the following error message:

Execution failed for task ‘:commons:unMock’. error in opening zip file

Please note, that tests are executed by invoking Gradle on the shell. I noticed this when running the tests on Jenkins.

Android Studio

In contrast, when I manually run the tests of the application module they pass. If I run the tests of commons submodule they fail.

• app ✅
• commons ❌