No speech in the alpha Installer, and speech freeze in Bookworm

Hi, I've tried to start installing Debian from NetInst alpha 1 for 
Trixie, but there was no speech at all. Once I get the system installed, 
I'm willing to help you diagnose the problem.

In the meantime, I downloaded NetInst for Bookworm 12.10, and there was 
speech this time. I started preparing to install, but when I finished 
network configuration, speech suddenly stopped. I changed to another 
shell and tried to restart it, but no commands worked. I tried things 
like kill -9 espeakup, systemctl stop espeakup, systemctl start 
espeakup, espeak-ng "test", but none talked.

Then I rebooted, and before starting installation again, I changed to 
another shell to make some tests before speech crashed again. I 
discovered that, for some reason, the environment doesn't recognize 
systemd commands, espeak-ng is not visible as well, and other commands 
behave oddly, for example, kill -9 doesn't accept a name, only a number. 
I guess that the Debian environment before installation is much more 
restrickted than other shells I've used in the past, such as ArchLinux.

I recall having this exact problem in the past on other distros, and it 
appears to be a speakup issue, since it occurred to me when using not 
only espeakup plus espeak, but also voxinup plus voxin. So, the problem 
probably exists for years.

In any case, I'd like suggestions on commands I could issue in order to 
try restarting speech in case of a crash in the middle of the installation.

Thanks,
Cleverson