Installation from source failed on Ubuntu 20.04

Hi all!

First of all thanks for the maintainers for providing such a much sought-after alternative to apt!

I tried to install nala on my Ubuntu 20.04 (unfortunately I can't upgrade it) as described here: https://gitlab.com/volian/nala/-/wikis/Installation#ubuntu-2004-debian-buster - by installing the required dependencies and then invoking sudo make legacy command.

Unfortunately I've ran into an error when make man was being executed:

$ sudo make man
# Install man pages
sudo python3.10 nala_build.py man --install
Installing docs/nala.8.rst -> /usr/share/man/man8/nala.8
Traceback (most recent call last):
  File "/home/szmiki/workspace/worktrees/nala/nala_build.py", line 203, in <module>
    nala_app()
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 214, in __call__
    return get_command(self)(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.10/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 532, in wrapper
    return callback(**use_params)  # type: ignore
  File "/home/szmiki/workspace/worktrees/nala/nala_build.py", line 80, in convert_man
    run(pandoc, check=True)
  File "/usr/local/lib/python3.10/subprocess.py", line 501, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/local/lib/python3.10/subprocess.py", line 969, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/local/lib/python3.10/subprocess.py", line 1845, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'pandoc'
make: *** [Makefile:54: man] Error 1

The problem persist even after installing pandoc with sudo python3.10 -m pip install pandoc.

However I've just skipped the man page generation step and went ahead and ran subsequent make steps successfully.

When I tried to verify whether nala installation was successful I got the following stacktrace:

$ nala
Traceback (most recent call last):
  File "/usr/local/bin/nala", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.10/site-packages/nala/__main__.py", line 42, in main
    nala()
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 214, in __call__
    return get_command(self)(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 232, in get_command
    click_command = get_group(typer_instance)
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 218, in get_group
    group = get_group_from_info(TyperInfo(typer_instance))
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 356, in get_group_from_info
    command = get_command_from_info(command_info=command_info)
  File "/usr/local/lib/python3.10/site-packages/typer/main.py", line 434, in get_command_from_info
    command = cls(
TypeError: Command.__init__() got an unexpected keyword argument 'no_args_is_help'

or an eye-candy version:

Any help or hints on resolving that one is very much appreciated as I can't wait to try this tool on my dated work machine 😁