# Constraints file for pip installations
# This file is used via PIP_CONSTRAINT environment variable to ensure
# setuptools version compatibility across all pip operations, including
# isolated build environments (PEP 517/518).
#
# setuptools<81.0.0 is required because:
# - setuptools>=81.0.0 removed the pkg_resources module
# - Legacy packages with setup.py may still import pkg_resources
# - This constraint ensures pkg_resources remains available during builds
setuptools<81.0.0
