Software⏱️ 2 min read📅 2026-06-02

How to Fix: gem install: Failed to build gem native extension (can't find header files)

Fix gem install: Failed to build gem native extension . The issue is due to the missing MySQL de. Step-by-step guide included.

Quick Answer: The issue is due to the missing MySQL development library. Install the mysql-server-devel package to fix the problem.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

The error message indicates that the gem installation failed to build native extensions due to an inability to find header files for Ruby.

🛑 Root Causes of the Error

  • The problem is likely due to a mismatch between the installed version of Ruby and the MySQL gem.

🚀 How to Resolve This Issue

Method 1: Install the required development packages

  1. Step 1: Run the following command as root user to install the required development packages:
yum install -y ruby-devel

Method 2: Rebuild the MySQL gem with the correct Ruby version

  1. Step 1: Run the following command as root user to rebuild the MySQL gem:
gem install mysql --build

✨ Wrapping Up

By following these steps, you should be able to resolve the issue and successfully install the MySQL gem.

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