I saw this flake in CI. Looks like a pex build for a test failed? Not sure what to make of it.. or how to reproduce it. Any insights as to what might have caused it?

Error: 5.36 [ERROR] 1 Exception encountered:

Engine traceback:
  in `test` goal

ProcessExecutionFailure: Process 'Building 49 requirements for requirements.pex from the .build/requirements/requirements-default.lock resolve: PyYAML>=6.0, alembic==1.11.2, apispec, astropy==5.2.2, beautifulsoup4>=4.12.2, cloud-sql-python-connector[pg8000], connexion[swagger-ui], dataclasses-json==0.5.9, flask-apispec==0.11.0, flask-caching, flask-cors, flask<2.2.0, google-api-core, google-auth, google-cloud-aiplatform, google-cloud-bigquery, google-cloud-logging, google-cloud-storage, google-cloud-tasks, imageio, lockfile, lxml, marshmallow, matplotlib, numpy>=1.16.0, openpyxl, pandas, photutils, pillow>=9.0.0, protobuf, pytest, python-dotenv, requests, requests-flask-adapter, scikit-image==0.20.0, scikit-learn==1.2.2, scipy, setuptools>=21.0.0, sgp4>=2.22, skyfield, slack-sdk, sqlalchemy-stubs, sqlalchemy<2.0.0, testcontainers[postgres], timezonefinder, tqdm, wand, werkzeug<2.1.0, xgboost' failed with exit code 1.
stdout:

stderr:
pid 10899 -> /home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/bin/python -sE /home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/pex --disable-pip-version-check --no-python-version-warning --exists-action a --no-input --use-deprecated legacy-resolver --isolated -q --cache-dir /home/runner/.cache/pants/named_caches/pex_root/pip_cache wheel --no-deps --wheel-dir /home/runner/.cache/pants/named_caches/pex_root/built_wheels/sdists/timezonefinder-6.2.0.tar.gz/d41fd2650bb4221fae5a61f9c2767158f9727c4aaca95e24da86394feb704220/cp39-cp39-manylinux_2_35_x86_64.9253fc1a1b8944d3aa929403d12f85b5.work /home/runner/.cache/pants/named_caches/pex_root/downloads/d41fd2650bb4221fae5a61f9c2767158f9727c4aaca95e24da86394feb704220/timezonefinder-6.2.0.tar.gz --index-url <https://pypi.org/simple/>  exited with 2 and STDERR:
ERROR: Exception:
Traceback (most recent call last):
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/cli/base_command.py", line 169, in exc_logging_wrapper
    status = run_func(*args)
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/cli/req_command.py", line 248, in wrapper
    return func(self, options, args)
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/commands/wheel.py", line 157, in run
    build_successes, build_failures = build(
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/wheel_builder.py", line 334, in build
    wheel_cache.record_download_origin(cache_dir, req.download_info)
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/cache.py", line 261, in record_download_origin
    origin = DirectUrl.from_json(origin_path.read_text())
  File "/home/runner/.cache/pants/named_caches/pex_root/venvs/581908d76e0b54163fd8eaf3d661b72960635cf2/15abec1ecc51940a1b0441c13c24ca48334847bb/lib/python3.9/site-packages/pip/_internal/models/direct_url.py", line 231, in from_json
    return cls.from_dict(json.loads(s))
  File "/home/runner/.pyenv/versions/3.9.10/lib/python3.9/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "/home/runner/.pyenv/versions/3.9.10/lib/python3.9/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/home/runner/.pyenv/versions/3.9.10/lib/python3.9/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)