未使用maven依赖插件正确复制资源

我试图让maven复制一些资源(特别是母版.css文件)从一个核心模块到依赖它的所有模块。

我试图用这个问题的第一个答案: Use a dependency's resources? :

<build>
        <plugins>
            <!--Extract core's resources-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.2</version>
                <executions>
                    <execution>
                        <id>unpack</id>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>unpack-dependencies</goal>
                        </goals>
                        <configuration>
                            <includeGroupIds>${project.groupId}</includeGroupIds>
                            <includeArtifactIds>core</includeArtifactIds>
                            <excludeTransitive>true</excludeTransitive>
                            <overWrite>true</overWrite>
                            <outputDirectory>${project.build.directory}/core-resources</outputDirectory>
                            <excludes>org/**,META-INF/**,rebel.xml</excludes>
                            <overWriteReleases>true</overWriteReleases>
                            <overWriteSnapshots>true</overWriteSnapshots>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <!--New resource locations-->
        <resources>
            <resource>
                <filtering>false</filtering>
                <directory>${project.build.directory}/core-resources</directory>
            </resource>
            <resource>
                <filtering>false</filtering>
                <directory>${basedir}/src/main/resources</directory>
            </resource>
        </resources>
    </build> 

以下是mvn clean install时该部件的输出:

--- maven-dependency-plugin:2.1:unpack-dependencies (unpack) @ Core ---

--- maven-resources-plugin:3.0.2:resources (default-resources) @ Core ---
Using 'UTF-8' encoding to copy filtered resources.
skip non existing resourceDirectory {project-directory}\Core\target\core-resources
Copying 16 resources

其中{project directory}是指向我的项目的完整路径。

我的核心资源文件夹如下所示:

src/main/resources
    /core-resources
        master.css
    /fxml
        ~some stuff~
    /imgs
        ~some stuff~
    /styles
        ~some stuff~

在依赖于核心的模块的目标目录中,我没有看到任何被复制的内容。

基本上,我有三个问题:

它是从哪里复制的?

为什么它现在不复制任何东西?