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Docker Compose Environment Variable Not Set in Dockerfile - Resolve pip's Externally-Managed-Environment Error-When to Use --allow-unrelated-histories in Git

Updated 2026-07-28 17:12:19windows-fixes

Docker Compose Environment Variable Not Set in Dockerfile - Resolve pip's Externally-Managed-Environment Error-When to Use --allow-unrelated-histories in Git

Likely symptom

Likely cause

Safe rollback

Verification route

Repeat the original action, not only a simplified test case.
Restart the app or reload the service after configuration changes.