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Vercel build fails while installing mysqlclient on Python 3.8

5fc31865-2647-4f49-aa6e-8a2ba4ac49bf

Vercel build fails while installing mysqlclient on Python 3.8

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Updated4/30/2026

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19 linked nodes

DESCRIBESQuestion

DESCRIBESQuestion

CAUSED_BYRootCause

mysqlclient needs MySQL client build flags and a compatible Python/runtime setup during wheel build

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Package Management

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Environment Variables

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Execution Environment Reuse

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FIXED_BYSolution

python version could be defined in the `Pipfile`. Tension: python version could be specified in `builds` or `functions` section of `Vercel.json`. Outcome: Note Vercel only supports python 3.12 (default) and python 3.9 (requires legacy image i.e. use Node.js 16 or 18.).

FIXED_BYSolution

Set MYSQLCLIENT_CFLAGS and MYSQLCLIENT_LDFLAGS, or install mysqlclient before requirements.txt in the GitHub Actions job

OCCURS_ONOperatingSystem

ESCALATES_TOProblem

requirements.txt error: subprocess-exited-with-error × Getting requirements to build wheel did not run successfully — While trying to upload my Django application. Tension: Command failed: pip3.12 install --disable-pip-version-check --target . --upgrade -r /vercel/path0/requirements.txt. Outcome: I was able to diagnose the issue and find the problem.

Binary Build Dependency Drift

Native Wheel Build Failures

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