Not able to build charms on osx

[jat-canonical]

I am trying to write tests for my charm using the operator framework but the charmcraft pack step fails as it neither uses a remote lxd cluster nor does it try to use multipass as charmcraft already uses if I try to build the charm locally directly outside tests.

My charmcraft.yaml:

type: charm
bases:
- build-on:
  - name: "ubuntu"
    channel: "20.04"
  run-on:
  - name: "ubuntu"
    channel: "20.04"
    architectures: [amd64, arm64]
- build-on:
  - name: "ubuntu"
    channel: "22.04"
  run-on:
  - name: "ubuntu"
    channel: "22.04"
    architectures: [amd64, arm64]
parts:
  charm:
    source: .
    charm-requirements: [requirements.txt]
    build-packages: [git]

The error I get is :

File "/Users/jatin/canonical/nats-operator/tests/integration/test_charm.py", line 8, in test_smoke
    charm = await ops_test.build_charm(".")
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jatin/canonical/nats-operator/.tox/integration/lib/python3.11/site-packages/pytest_operator/plugin.py", line 969, in build_charm
    assert "lxd" in all_groups, (
AssertionError: Group 'lxd' required but not available; ensure that lxd is available or use --destructive-mode
assert 'lxd' in {'_accessoryupdater', '_amavisd', '_analyticsd', '_analyticsusers', '_appinstalld', '_appleevents', ...}

Using --destructive-mode also fails as it does not find lxd on the host:

  File "/Users/jatin/canonical/nats-operator/tests/integration/test_charm.py", line 8, in test_smoke
    charm = await ops_test.build_charm(".")
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jatin/canonical/nats-operator/.tox/integration/lib/python3.11/site-packages/pytest_operator/plugin.py", line 1004, in build_charm
    raise RuntimeError(
RuntimeError: Failed to build charm .:
Packing the charm.
Skipping 'bases[0].build-on[0]': name 'ubuntu' does not match host 'darwin'.
No suitable 'build-on' environment found in 'bases[0]' configuration.
Skipping 'bases[1].build-on[0]': name 'ubuntu' does not match host 'darwin'.
No suitable 'build-on' environment found in 'bases[1]' configuration.
No suitable 'build-on' environment found in any 'bases' configuration.

https://github.com/charmed-kubernetes/pytest-operator/blob/117350c3cee10dafdf42471b0d383392946bde14/pytest_operator/plugin.py#L966C31-L966C43