Minimum download set for 21.0

I'm wondering what the minimum list of things you need to download is to get a Xemacs that can then update packages at will. I've downloaded and built from source xemacs-21.0.64. This runs, but the package stuff is non-functional, presumably because efs isn't there. I added xemacs-base-1.30-pkg.tar.gz, but this still isn't enough. I suspect the minimum is xemacs, xemacs-base and efs but I'm guessing. What would be nice would be to have the xemacs source, and then a xemacs-base package that did allow the package interface to be used. This would allow people to download only those bits they really want, without having to do it manually. Malcolm