I was able to reproduce this on my system. First this is the error that happens when installing. This is what crashes Nala because of the formatter.
```
Traceback (most recent call last):
File "/usr/bin/debreate", line 230, in <module>
main()
File "/usr/bin/debreate", line 27, in main
import globals.paths
File "/usr/share/debreate/globals/paths.py", line 16, in <module>
import libdbr.paths
File "/usr/share/debreate/lib/libdbr/paths.py", line 18, in <module>
from . import sysinfo
File "/usr/share/debreate/lib/libdbr/sysinfo.py", line 37, in <module>
if not __os_name:
^^^^^^^^^
NameError: name '__os_name' is not defined
```
This portion happens with apt as well, although apt doesn't crash. If you use --raw-dpkg switch with Nala it will complete. I have already fixed this crash upstream but haven't released yet.
I would say you should likely report this to the debreate devs, even getting the install to complete with apt, the same error is thrown when I try to run the program.