[Bug]: pixi run local-start unable to start (issues with time zone modules)

[vkuznet]

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Bug Description

here is output from zsh shell on macOS:

pixi run local-start
...
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/.pixi/envs/default-gubbins/lib/python3.11/importlib/__init__.py", line 126, in imp
ort_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1126, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1140, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'tzdata'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<frozen runpy>", line 189, in _run_module_as_main
  File "<frozen runpy>", line 148, in _get_module_details
  File "<frozen runpy>", line 112, in _get_module_details
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/__init__.py", line 5, in <module>
    from . import exceptions, os, sql
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/sql/__init__.py", line 13, in <module>
    from .auth.db import AuthDB
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/sql/auth/db.py", line 18, in <module>
    from diracx.db.sql.utils import BaseSQLDB, hash, substract_date, uuid7_from_datetime
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/sql/utils/__init__.py", line 25, in <module>
    from .base import (
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/sql/utils/base.py", line 33, in <module>
    from diracx.db.sql.utils.types import SmarterDateTime
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/diracx-db/src/diracx/db/sql/utils/types.py", line 14, in <module>
    _DEFAULT_UTC = ZoneInfo("UTC")
                   ^^^^^^^^^^^^^^^
  File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/.pixi/envs/default-gubbins/lib/python3.11/zoneinfo/_common.py", line 24, in load_t module>
[worker-sm ] [13:08:31]   File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/.pixi/envs/default-gubbins/lib/python3.11/zoneinfo/_common.py", line 24, in load_tzdata
[worker-md ] [13:08:31]     _DEFAULT_UTC = ZoneInfo("UTC")
[worker-lg ] [13:08:31]     _DEFAULT_UTC = ZoneInfo("UTC")
[worker-sm ] [13:08:31]     raise ZoneInfoNotFoundError(f"No time zone found with key {key}")
[worker-md ] [13:08:31]                    ^^^^^^^^^^^^^^^
[worker-sm ] [13:08:31] zoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key UTC'
[worker-lg ] [13:08:31]                    ^^^^^^^^^^^^^^^
[worker-md ] [13:08:31]   File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/.pixi/envs/default-gubbins/lib/python3.11/zoneinfo/_common.py", line 24, in load_tzdata
[worker-md ] [13:08:31]     raise ZoneInfoNotFoundError(f"No time zone found with key {key}")
[worker-lg ] [13:08:31]   File "/Users/vk/CMS/DMWM/GIT/DIRAC/diracx/.pixi/envs/default-gubbins/lib/python3.11/zoneinfo/_common.py", line 24, in load_tzdata
[worker-md ] [13:08:31] zoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key UTC'
[worker-lg ] [13:08:31]     raise ZoneInfoNotFoundError(f"No time zone found with key {key}")
[worker-lg ] [13:08:31] zoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key UTC'

....

Steps to Reproduce

1. git pull
2. pixi run local-start

Expected Behavior

should provide a clean start

Actual Behavior

choke on loading time zone python modules.

uvicorn.log

Environment

• OS: macOS

uname -a
Darwin vkarm 24.6.0 Darwin Kernel Version 24.6.0: Tue Apr 21 20:13:48 PDT 2026; root:xnu-11417.140.69.710.16~1/RELEASE_ARM64_T8112 arm64

• python 3.11
• zsh
• repository version

git log --oneline --decorate
0484464 (HEAD -> main, origin/main, origin/HEAD) chore(main): release 0.1.1 (#913)
0da77e0 chore: release 0.1.1
...

Relevant Log Output

see attached uvicorn.log file

Additional Context

No response