OSError('out of pty devices') while ./batou secrets reencrypt

[frlan]

I can reproduce it with using batou secrets reencrypt over a bigger amount iof secrets.

Traceback (most recent call last):
  File "/Users/myproject/path/./.appenv/f05492d8/bin/batou", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/main.py", line 221, in main
    return args.func(**func_args)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/secrets/manage.py", line 81, in reencrypt
    environment.secret_provider.write_config(
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/secrets/__init__.py", line 608, in write_config
    self.write_secret_files(self.read_secret_files())
                            ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/secrets/__init__.py", line 328, in read_secret_files
    secret_files[filename] = file.decrypted
                             ^^^^^^^^^^^^^^
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/secrets/encryption.py", line 32, in decrypted
    self._decrypted = self.decrypt()
                      ^^^^^^^^^^^^^^
  File "/Users/myproject/path/.appenv/f05492d8/lib/python3.11/site-packages/batou/secrets/encryption.py", line 309, in decrypt
    child_pid, fd = pty.fork()
                    ^^^^^^^^^^
  File "/Users/frlan/.nix-profile/lib/python3.11/pty.py", line 101, in fork
    master_fd, slave_fd = openpty()
                          ^^^^^^^^^
  File "/Users/frlan/.nix-profile/lib/python3.11/pty.py", line 34, in openpty
    master_fd, slave_name = _open_terminal()
                            ^^^^^^^^^^^^^^^^
  File "/Users/frlan/.nix-profile/lib/python3.11/pty.py", line 64, in _open_terminal
    raise OSError('out of pty devices')
OSError: out of pty devices

This happend with batou 2.4.1 - but I can also reproduce it with 2.5.2, too.

I've got a few extra files inside my deployment:

➜  environments git:(master) ✗ find . -name '*.age' | wc -l 
      62