Fix tox CI failure using pip constraints file#372
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Use a pip constraints file with PIP_CONSTRAINT environment variable to properly constrain setuptools version across all pip operations, including isolated build environments. The previous approach of adding setuptools<70 to tox.ini deps only affected the main tox environment. When pip creates isolated build environments per PEP 517 to build packages from source (like flatdict), it installs the latest setuptools by default. Since setuptools 70+ removed the deprecated pkg_resources module that flatdict 4.0.1's setup.py requires, the build fails. Setting PIP_CONSTRAINT to a constraints file containing setuptools<70 ensures all pip operations (including isolated builds) use setuptools 69.x, which still includes pkg_resources, allowing flatdict to build successfully. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
somethingnew2-0
approved these changes
Feb 13, 2026
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Constrain the
setuptoolsversion across all pip operations, including isolated build environments. This fixes a breakage wherebysetuptools 70+removed the deprecatedpkg_resourcesmodule thatflatdict 4.0.1'ssetup.pyrequires, causing the build to fail:Setting
PIP_CONSTRAINTto a constraints file containingsetuptools<70ensures all pip operations (including isolated builds) usesetuptools 69.x, which still includespkg_resources, allowingflatdictto build successfully.Ideally, we can remove this with future upgrades to the
oktaorflatdictpackages.