Update 1: I’ve posted updated instructions for version 0.4.2 of duplicity here.
As a follow up to my previous article on rdiff-backup, I’ve patched duplicity to work correctly on Cygwin.
To install it you’ll need the same prerequisites as for rdiff-backup. Additionally you should install the Utils/gnupg package in order to get the encryption working.
Here is how to compile and install duplicity: