Command failed with exit code 1: npm run build (https://ntl.fyi/exit-code-1) - April 2023

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[Support Guide] Netlify app builds locally but fails on deploy (case sensitivity)

Last updated by Netlify Support: July 2025 Are you struggling to understand why your project runs locally but errors out with missing files or logs that point toward issues with case when you try and build on Netlify? You are not alone. Often, case (as in: UPPERCASE or lowercase letters in filenames or paths) can cause problems. Here is a guide to understanding how case sensitivity issues present themselves, why they arise, and how you can fix them! 1. Errors you might see Case sensitivity iss…