Exclude virtual env dirs

Hi,

I have been using rdiff-backup happily for some years now without any issue=
. So thanks!

I am updating my use to exclude a set of directories that are created when =
using virtual environments for python development. These directories are cr=
eated into the source trees and they are always called '.pixi'. Since they =
are scattered all over the place when one has many projects, I can=E2=80=99=
t use full paths or even relative paths to a common base dir.

I first tried using --exclude '**.pixi', but they are still present in the =
backups. I don't know if there is some interaction with other include/exclu=
de options, so I have tried using  --exclude-regexp '.pixi' and the result =
is the same.

I am a bit ashamed of asking the question, but I have read the man page and=
 done some research on the internet and I still struggle to understand what=
 the problem is.

Thanks in advance for your help.

G.