py-msgpack 1.0.0 upgrade broke salt

The release notes have

* Remove encoding option from the Packer and Unpacker.

( https://github.com/msgpack/msgpack-python/blob/v1.0.0/ChangeLog.rst )

$ doas salt-minion

Process Process-1:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/multiprocessing/process.py", line 267, in _bootstrap
self.run()
File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/lib/python2.7/site-packages/salt/scripts.py", line 146, in minion_process
minion.start()
File "/usr/local/lib/python2.7/site-packages/salt/cli/daemons.py", line 348, in start
self.minion.tune_in()
File "/usr/local/lib/python2.7/site-packages/salt/minion.py", line 1026, in tune_in
self._bind()
File "/usr/local/lib/python2.7/site-packages/salt/minion.py", line 940, in _bind
self.event = salt.utils.event.get_event('minion', opts=self.opts, io_loop=self.io_loop)
File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 143, in get_event
raise_errors=raise_errors)
File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 271, in __init__
self.connect_pub()
File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 383, in connect_pub
io_loop=self.io_loop
File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 257, in __new__
client.__singleton_init__(io_loop=io_loop, socket_path=socket_path)
File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 620, in __singleton_init__
socket_path, io_loop=io_loop)
File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 280, in __singleton_init__
self.unpacker = msgpack.Unpacker(encoding=encoding)
TypeError: __init__() got an unexpected keyword argument 'encoding'

Thanks,
Florian

--
I'm not entirely sure you are real.