Thanks.
I followed the instructions at https://gajim.org/downloads.php?lang=en#ubuntu
But this is what I get:
~$ sudo apt install gajim-nightly
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have requested
an impossible situation or if you are using the unstable distribution that
some required packages have not yet been created or been moved out of
Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
gajim-nightly : Depends: python3-precis-i18n but it is not installable
Depends: gir1.2-gtk-3.0 (>= 3.22) but 3.18.9-1ubuntu3.3 is
to be installed
Recommends: python3-crypto but it is not going to be
installed
Recommends: python3-gnupg (>= 0.3.8) but it is not going to
be installed
E: Unable to correct problems, you have held broken packages.
