images/airflow/2.10.3/python/mwaa/entrypoint.py [231:279]:
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        subprocess_logger = CompositeLogger(
            "requirements_composite_logging",  # name can be anything unused.
            # We use a set to avoid double logging to console if the user doesn't
            # use CloudWatch for logging.
            *set(
                [
                    logging.getLogger(MWAA_LOGGERS.get(f"{logger_prefix}_requirements")),
                    logger,
                ]
            ),
        )

        extra_args = []
        try:
            if not _requirements_has_constraints(requirements_file):
                subprocess_logger.warning(
                    "WARNING: Constraints should be specified for requirements.txt. "
                    f"Please see {MWAA_DOCS_REQUIREMENTS_GUIDE}"
                )
                subprocess_logger.warning("Forcing local constraints")
                extra_args = ["-c", os.environ["AIRFLOW_CONSTRAINTS_FILE"]]
        except Exception as e:
            subprocess_logger.warning(f"Unable to scan requirements file: {e}")
            subprocess_logger.warning(
                "Cannot determine whether the requirements.txt file has constraints "
                "or not; forcing local constraints."
            )
            extra_args = ["-c", os.environ["AIRFLOW_CONSTRAINTS_FILE"]]

        pip_process = Subprocess(
            cmd=["safe-pip-install", "-r", requirements_file, *extra_args],
            env=environ,
            process_logger=subprocess_logger,
            conditions=[
                TimeoutCondition(USER_REQUIREMENTS_MAX_INSTALL_TIME),
            ],
            friendly_name=f"{logger_prefix}_requirements",
        )
        pip_process.start()
        if pip_process.process and pip_process.process.returncode != 0:
            subprocess_logger.error(
                "ERROR: pip installation exited with a non-zero error code. This could "
                "be the result of package conflict. Notice that MWAA enforces a list "
                "of critical packages, e.g. Airflow, Celery, among others, whose "
                "version cannot be overridden by the customer as that can break our "
                "setup. Please double check your requirements.txt file."
            )
    else:
        logger.info("No user requirements to install.")
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