How to set up Aether to also resolve SNAPSHOT dependencies?

Question

I am using the following snippet (from the aether examples) to resolve maven dependencies using Aether. BUt it fails for the snapshot dependencies. Is there a way I can set up the configuration to include the snapshot dependencies as well?

 public static void main( String[] args )
    throws Exception
{
    System.out.println( "------------------------------------------------------------" );
    System.out.println( GetDirectDependencies.class.getSimpleName() );

    RepositorySystem system = Booter.newRepositorySystem();

    RepositorySystemSession session = Booter.newRepositorySystemSession( system );

    Artifact artifact = new DefaultArtifact( "org.eclipse.aether:aether-impl:1.0.0.v20140518" );

    ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest();
    descriptorRequest.setArtifact( artifact );
    descriptorRequest.setRepositories( Booter.newRepositories( system, session ) );

    ArtifactDescriptorResult descriptorResult = system.readArtifactDescriptor( session, descriptorRequest );

    for ( Dependency dependency : descriptorResult.getDependencies() )
    {
        System.out.println( dependency );
    }
}