<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.boundary</groupId>
  <artifactId>boundary-api-shell</artifactId>
  <version>0.2.0</version>
  <packaging>jar</packaging>

  <name>boundary-api-shell</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    
    <maven-assembly-plugin-version>2.4</maven-assembly-plugin-version>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>${maven-assembly-plugin-version}</version>
        <executions>
          <execution>
            <id>make-assembly</id> 
            <phase>package</phase>
            <goals>
              <goal>assembly</goal>
            </goals>
            <configuration>
              <descriptors>
                <descriptor>src/main/assembly/default.xml</descriptor>
              </descriptors>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  </dependencies>
</project>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.boundary</groupId>
  <artifactId>boundary-api-shell</artifactId>
  <version>0.2.0</version>
  <packaging>jar</packaging>

  <name>boundary-api-shell</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    
    <maven-assembly-plugin-version>2.5.3</maven-assembly-plugin-version>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>${maven-assembly-plugin-version}</version>
        <configuration>
          <descriptors>
            <descriptor>src/main/assembly/default.xml</descriptor>
          </descriptors>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  </dependencies>
</project>

Add correct configuration for assembly plugin
Add correct configuration for assembly plugin
