Thanks everyone for your comments.

I tried the method suggested by Mercury, but it did not work for me. I was getting to many errors about unsolvable dependencies.

What I did in the end was to install from source:

version 1.1.0 (2025-08-21) from
https://archive.xfce.org/src/apps/xfdashboard/1.1/

Dependencies required depend on what's already installed.
I installed these.

cmake meson libgarcon-1-dev libxfce4ui-2-dev libcogl-dev libclutter-1.0-0 libclutter-1.0-dev libwnck-3-dev gettext

Then:

# tar xf xfdashboard-<version>.tar.bz2
# cd xfdashboard-<version>
# meson setup build
# meson compile -C build
# meson install -C build

Installed without problem.

But when I tried $ xfdasboard in terminal I got this error:

xfdashboard: error while loading shared libraries: libxfdashboard.so.0.10100.0: cannot open shared object file: No such file or directory

To test if it works I did:

export LD_LIBRARY_PATH=/home/neo/Downloads/Devuan/.bin/xfdashboard-1.1.0/build/libxfdashboard/:$LD_LIBRARY_PATH

then

$ xfdashboard

It worked great

So, I placed my build directory in to my PATH. That's where the offending libxfdashboard.so.0.10100.0 is.

Rebooted, Works great

Added xfdashboard to a hot-corner. Happy now.