Here is a little session
± gcloud auth login gcloud
ERROR: gcloud failed to load: module 'collections' has no attribute 'Mapping'
gcloud_main = _import_gcloud_main()
import googlecloudsdk.gcloud_main
from googlecloudsdk.calliope import cli
from googlecloudsdk.calliope import actions
from googlecloudsdk.calliope import markdown
from googlecloudsdk.calliope import usage_text
from googlecloudsdk.calliope import parser_arguments
from googlecloudsdk.calliope import parser_completer
from googlecloudsdk.core.console import progress_tracker
class _BaseStagedProgressTracker(collections.Mapping):
This usually indicates corruption in your gcloud installation or problems with your Python interpreter.
Please verify that the following is the path to a working Python 2.7 or 3.5+ executable:
/usr/local/bin/python3
If it is not, please set the CLOUDSDK_PYTHON environment variable to point to a working Python 2.7 or 3.5+ executable.
If you are still experiencing problems, please reinstall the Cloud SDK using the instructions here:
https://cloud.google.com/sdk/
Ok, what about:
± flox install -e gcloud google-cloud-sdk
Success!
± . <(flox activate -e gcloud)
flox [gcloud default]
± gcloud auth login Your browser has been opened to visit:
...
I’m not sure yet if gcloud needs an environment on its own but not having to worry about python dependencies is a great win 
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