Dropbox Sync: Unable to build in Gingerbread, StartLink calls Android.App.Fragment

I am working on adding Dropbox support to my app. I've added the following component:

http://components.xamarin.com/view/dropboxsync/

And the app is calling:

DBAccountManager Account = DBAccountManager.GetInstance (context, DropboxSyncKey, DropboxSyncSecret);
Account.StartLink(activity, LinkToDropboxRequest);

I get the following error:

.../Code/Models/DropboxModel.cs(12,12): Error CS1684: Reference to type Android.App.Fragment' claims it is defined assemblyMono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065', but it could not be found (CS1684)

Is it just not possible to use this component with my app since I am using Gingerbread?

I have tried make it think that Android.App.Fragment is Android.Support.V4.App.Fragment with the following:

namespace Android.App
{

  public class Fragment : Android.Support.V4.App.Fragment
  {

  }

}

But that didn't seem to work ...