src/it/projects/multimodule/twoLevel-includeSubModules-excludeSubModuleSourceDirs/child-level1-project2/pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project>
  <parent>
    <groupId>test</groupId>
    <artifactId>two-level-multimodule</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>
  <modelVersion>4.0.0</modelVersion>
    <artifactId>child-level1-project2</artifactId>
  <version>1.0-SNAPSHOT</version>

  <packaging>pom</packaging>

  <modules>
    <module>child-level2-project1</module>
  </modules>
</project>