Exception when getting an Instance of the ModuleManager

I've been trying to write a WPF application using PRISM and MEF and I've been able to get the Shell up and running. I want to be able to load Modules on demand so I need an instance of IModuleManager in the Shell. However, when I try to import it, the application breaks. Here is the relevant code:

Bootstrapper:

    public class Bootstrapper : MefBootstrapper
    {
        protected override DependencyObject CreateShell()
        {
            return this.Container.GetExportedValue<Shell>();
        }

        protected override void InitializeShell()
        {
            base.InitializeShell();

            Application.Current.MainWindow = (Shell)this.Shell;
            Application.Current.MainWindow.Show();
        }

        protected override void ConfigureAggregateCatalog()
        {
            base.ConfigureAggregateCatalog();

            // Add this assembly to export ModuleTracker
            this.AggregateCatalog.Catalogs.Add(new AssemblyCatalog(typeof(Bootstrapper).Assembly));

            DirectoryModuleCatalog moduleCatalog = new DirectoryModuleCatalog();
            moduleCatalog.ModulePath = @".\Modules";
            moduleCatalog.Load();
            foreach (ModuleInfo moduleInfo in moduleCatalog.Modules)
            {
                this.ModuleCatalog.AddModule(moduleInfo);
            }
            DirectoryCatalog catalog = new DirectoryCatalog(@".\Modules");
            this.AggregateCatalog.Catalogs.Add(catalog);

            base.ConfigureAggregateCatalog();
        }

        protected override void ConfigureContainer()
        {
            //Export the Container so that it can be injected if needed.
            this.Container.ComposeExportedValue(Container);

            //Export the Module Catalog so that it can be injected if needed.
            this.Container.ComposeExportedValue(ModuleCatalog);

            base.ConfigureContainer();
        }

        protected override IModuleCatalog CreateModuleCatalog()
        {
            return new ConfigurationModuleCatalog();
        }
    }

Shell:
   

[Export(typeof(Shell))]
public partial class Shell : Window, IPartImportsSatisfiedNotification
{
    [Import(AllowRecomposition = false)]
    private IModuleManager moduleManager;

    public Shell()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
           
    }

    public void OnImportsSatisfied()
    {
            
    }
}

The exception I'm getting is:

    No exports were found that match the constraint: 
ContractNameShell
RequiredTypeIdentityShell

If I remove the [Import] attribute for the IModuleManager, everything works fine. Is there something I need to do to export IModuleManager?