"endpoint requires a more connection"

[AstraLuma]

When attempting to build an image, I get this extremely nonsensical error:

>>> podcraft.poddir.build_server(pm, "/home/astraluma/.mc/qwi", {})
Traceback (most recent call last):
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/podman/libs/images.py", line 138, in build
    result = podman.BuildImage(config)
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/varlink/client.py", line 89, in _wrapped
    return self._call(method.name, *args, **kwargs)
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/varlink/client.py", line 146, in _call
    (message, more) = self._next_varlink_message()
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/varlink/client.py", line 116, in _next_varlink_message
    raise e
varlink.error.VarlinkError: {'parameters': {'reason': 'endpoint requires a more connection'}, 'error': 'io.podman.ErrorOccurred'}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/astraluma/code/mc/podcraft/podcraft/poddir.py", line 57, in build_server
    'podcraft.root': serverdir,
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/podman/libs/images.py", line 138, in build
    result = podman.BuildImage(config)
  File "/home/astraluma/.virtualenvs/mc/podcraft/lib/python3.7/site-packages/podman/client.py", line 109, in __exit__
    raise error_factory(e)
podman.libs.errors.ErrorOccurred: {'parameters': {'reason': 'endpoint requires a more connection'}, 'error': 'io.podman.ErrorOccurred'}

The invocation is

client.images.build(
    buildArgs=buildargs,  # Dictionary, empty
    contextDir=buildroot,  # String, full path to a .tar
    dockerfile=dockerfile,  # String, full path to Dockerfile
    tags="TODO",
    annotations={
        'podcraft.root': serverdir,  # String, a full path (doesn't exit)
    },
)

Best as I can read the go code (don't know go) and can google, this sounds like the particulars of how python-podman is constructing the varlink invocation?

[AstraLuma]

https://github.com/containers/libpod/blob/d62fce0c873bdd1341af15eba4418ff83af7edba/pkg/varlinkapi/images.go#L233

https://github.com/containers/python-podman/blob/08a458a1c2d0fe74ef398b237a2ecb415e801c85/podman/libs/images.py#L138

[AstraLuma]

context: https://github.com/minecraft-podman/podcraft/blob/93a2d3327a60241ab4b45944ed7c1149e11c77e0/podcraft/poddir.py#L23-L59