Processing triggers for libc-bin (2.23-0ubuntu2) ...
Traceback (most recent call last):
  File "/usr/bin/snapcraft", line 31, in <module>
    snapcraft.main.main()
  File "/usr/lib/python3/dist-packages/snapcraft/main.py", line 143, in main
    project_options = _get_project_options(args)
  File "/usr/lib/python3/dist-packages/snapcraft/main.py", line 131, in _get_project_options
    return snapcraft.ProjectOptions(**options)
  File "/usr/lib/python3/dist-packages/snapcraft/_options.py", line 135, in __init__
    self._set_machine(target_deb_arch)
  File "/usr/lib/python3/dist-packages/snapcraft/_options.py", line 145, in _set_machine
    self.__machine_info = _ARCH_TRANSLATIONS[self.__target_machine]
KeyError: 's390x'
P: Begin unmounting filesystems...
P: Saving caches...