I have no idea how is this possible, but during build of live Debian iso
of testing/bookworm, using live-build, I got this:

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:
 pulseaudio-module-gsettings : Depends: pulseaudio (= 16.1+dfsg1-2+b1)
 pulseaudio-module-zeroconf : Depends: pulseaudio (= 16.1+dfsg1-2+b1)
E: Unable to correct problems, you have held broken packages.
E: An unexpected failure occurred, exiting...
P: Begin unmounting filesystems...
P: Saving caches...
Reading package lists...
Building dependency tree...
Reading state information...

real	2m38.843s
user	0m0.002s
sys	0m0.013s


Tried with 3 different mirrors.

The list provided to the apt-get does not contain pulseaudio or any
pulseaudio modules. It does contain libpulse-dev specified manually. And
some other packages. So the pulseaudio itself is installed via transitive
dependency (i.e. something like gnome or mate). (the actuall command line
to apt is too long too list here, it has over 8000 packages specified).

I had no issues few weeks ago, and I changed nothing. So something must
have changed in packaging, apt or archive.