sysutils/duplicity broken?

[Jeff Rizzo <riz%tastylime.net@localhost>]

I started playing around with duplicity for encrypted backups to Amazon 
S3 with binary packages from the netbsd repository, and apart from the 
fact that there's an unmarked dependency on py-xml and/or py-expat, it 
seems to work OK.  This was duplicity 0.5.20, from the most recent 
pkgsrc branch.  I was able to back up to S3 and restore from it.

So, I noticed there was a much newer version (0.6.16) in pkgsrc-current, 
so I set up a new VM to try it out.  It doesn't work out of the box - 
after much poking around, I was able to figure out it wants a newer 
py-boto and some other not-in-pkgsrc code (filechunkio) in order to 
support S3.  I updated it in pkgsrc (boto to version 2.1.0, and created 
a py-filechunkio pkg), and got it to at least *run*.

Once I did this, I was able to actually write backups to S3, but I have 
so far been unable to restore from them;  either backups created with 
0.6.16 or those created with 0.5.20.  I suspect at least some of the 
fault is with duplicity itself (if I'm reading their buglist correctly, 
there's a problem with restores in 0.6.16), but clearly the packaging is 
missing some stuff.

Does anyone else use duplicity?  Are you able to use it with S3 under 
NetBSD?  I can roll back to 0.5.20 if need be, but I'd rather not lose 
forward compatibility...

+j