Building an executable jar with maven depencies and external jars

I have an application where Im using maven dependecies and Im also using an external jar of a project which is located in my computer, the project is added to the application manually. The problem is whenever I export the project with maven, It only exports all maven dependencies, not the externatl jar that I have included manually. Is there anyway that I can export it?

Here is my pom.xml:

<build>
	<plugins>
		<plugin>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-dependency-plugin</artifactId>
			<executions>
				<execution>
					<id>copy-dependencies</id>
					<phase>prepare-package</phase>
					<goals>
						<goal>copy-dependencies</goal>
					</goals>
					<configuration>
						<outputDirectory>
							${project.build.directory}/libs
						</outputDirectory>
					</configuration>
				</execution>
			</executions>
		</plugin>
		<plugin>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-jar-plugin</artifactId>
			<configuration>
				<archive>
					<manifest>
						<addClasspath>true</addClasspath>
						<classpathPrefix>libs/</classpathPrefix>
						<mainClass>
							com.cristianruizblog.loginSecurity.LoginSecurityTutorialApplication
						</mainClass>
					</manifest>
				</archive>
			</configuration>
		</plugin>
		<plugin>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-maven-plugin</artifactId>
		</plugin>
	</plugins>
</build>

Thanks for reading. If anyone can help I would be so happy!

As stated by @M. Deunum, try to get your external jar into a Maven repository to avoid enable any machine to build your jar. If this is no option, you can use the Maven system dependency scope to include the jar. Note that this is only a temporary solution as this scope has been marked as depricated.