@exponentialmatrix
Built easydeb deb package for /opt and installed it.
Used /opt/easydeb to build dsnote-git, it was a bit of a pig (dependencies) but got there in the end.

Identified only one hiccup with easydeb:

optdepends_x86_64=(
  'amdvlk: Vulkan support for AMD GPU (AMDVLK Open)'

the second open brace causes easydeb to barf despite being inside single quotes.

Thank you for a very useful tool.

~# apt-cache show systemctl

Yes it is in Debian as expected and it is intended for use in containers running on systemd hosts.

@greenjeans will fake devices work for your testing ?

~# modprobe snd-aloop snd-dummy

~# aplay -l 
card 3: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
  Subdevices: 2/2
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
card 4: Dummy [Dummy], device 0: Dummy PCM [Dummy PCM]
  Subdevices: 2/2
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1

@greenjeans, thanks very much for that.

I assume the following
If a pre-release live image was used to perform an install the sources.list would be syntactically correct but referring to the (now) incorrect repository. Doesn’t happen.

Many of the packages may be out-of-date mainly because of dependencies, and a stale apt\dpkg cache would also prevent locating packages.

This is all guesswork on my part, any other ideas gratefully received.

@greenjeans ...dont know how up-to-date this is but it will give you a rough idea of the number of mirrors avaiable (or not)
https://pkgmaster.devuan.org/mirror_list.txt

I need to see all of the output

"Necesito ver toda la salida."

@greenjeans, I notice your new pcm.dmixed_equal section (equal->plug) is in the reverse order to your legacy name pcm.equal (plug->equal).
Is that intentional ?

NB Just checked my config, order is plug->equal

@greenjeans

I have seen someone (fsmithred ?, ralph.ronquist ?) offer someone project space on git.devuan.org.
Your project is quite small (no offence, small is beautiful ) and therefore would not be a resource gobbler, and I am sure of interest to Devuan users even if unlikely to be qualified for packaging.
Uploading to git.devuan.org. you could concentrate on developing and the interested could follow your progress as (in)frequently as they choose.
Testing and bug reports could also be more forthcoming (at least in theory).

Why ?

@Gnostic, You can't its more of an 'action' than an 'app'