"Backups" (deja-dup): after installing duplicity 0.8 from source, "Backups" can't find it

When using "Backups" (a.k.a. deja-dup) - it doesn't find duplicity, although it's installed: I have been trying to backup using "Backups" (a.k.a. deja-dup), and it turns out that the current duplicity (which deja-dup uses) still has the "Unicode bug" (it fails when dealing with Unicode strings). (I have "Backups" (a.k.a. deja-dup) installed on my system: "deja-dup backup tool" v 37.0, and had duplicity v 0.7.17). My system: ~$ lsb_release -a Description: Ubuntu 18.04.3 LTS; Release: 18.04; Codename: bionic So, I then removed the existing installation of duplicity, and installed duplicity 0.8 from source: https://launchpad.net/duplicity . It installs duplicity at: /usr/local/bin. It's in PATH: ~$ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin After loading and installing all the requirements, duplicity 0.8 itself runs fine: ~$ duplicity -V duplicity 0.8.05 But, when running "Backups" (deja-dup), it doesn't find it. A window pops up, saying: > INSTALL PACKAGES > In order to continue, the following package needs to > be installed: duplicity I installed dconf-editor, found /org/gnome/deja-dup, but I don't see there any settings for the duplicity path. nautilus and "apt list --installed" don't see it, either. Note: cross posted here