Executable JAR ignores its own Class-Path attribute
Manifest-Version: 1.0
Class-Path: jace-runtime.jar
Main-Class: org.jace.examples.Test

public class Test
{
    public static void main(String[] args)
    {
        System.out.println("classpath: " + System.getProperty("java.class.path"));
        System.out.println("PeerExample: " + Class.forName("org.jace.util.ShutdownHook"));
    }
}

<configuration>
  <archive>
    <index>true</index>
  </archive>
</configuration>