Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.6:single
(foo-services-zip) on project foo-ear: Failed to create assembly:
Error creating assembly archive foo-services-dist: There is more
than one file in input.

<project>
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>com.vegicorp.foo</groupId>
        <artifactId>foo-parent</artifactId>
        <version>1.0.0</version>
        <relativePath>..</relativePath>
    </parent>
    <artifactId>foo-ear</artifactId>
    <packaging>ear</packaging>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-ear-plugin</artifactId>
                <version>2.10.1</version>
                [...]
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <executions>
                    <execution>
                        <id>build-foo-zip</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                        <configuration>
                            <descriptors>
                                <descriptor>src/assembly/foo-zip.xml</descriptor>
                            </descriptors>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
    <dependencies>
    [...]
    </dependencies>
</project>

<assembly>
    <id>foo-zip</id>
    <formats>
        <format>gzip</format>
    </formats>
    <includeBaseDirectory>true</includeBaseDirectory>
    <fileSets>
        <fileSet>
            <directory>src/dist-files</directory>
            <outputDirectory></outputDirectory>
        </fileSet>
    </fileSets>
    <moduleSets>
        <moduleSet>
            <useAllReactorProjects>true</useAllReactorProjects>
            <includes>
                <include>com.vegicorp.foo:foo-ear</include>
            </includes>
            <binaries>
                 <includeDependencies>false</includeDependencies>
                <outputDirectory>data/ear-dir</outputDirectory>
                <unpack>true</unpack>
            </binaries>
        </moduleSet>
    </moduleSets>
</assembly>