npm ERR! code ELIFECYCLE

What This Error Means

An npm script failed (a lifecycle script exited with a non-zero status).

How to Fix It

1. Scroll up to the first error printed by the failing script, ELIFECYCLE is usually the wrapper error.
2. Re-run just the failing script for clearer output (example: npm run <script> -- --verbose).
3. Ensure required toolchain is installed (common: Python, C compiler toolchain, make).
4. If this is in CI, compare environment variables and build dependencies with local.

Why It Happens

• A postinstall / install / prepare script failed due to missing toolchain or environment.
• A dependency build step failed (native addon compilation, missing Python, missing make, etc.).
• The script itself is failing with an application error.

How to Verify

1. Re-run the failing script and confirm it exits 0.
2. Re-run npm install and confirm the lifecycle error is gone.

Manual debugging checklist

1. Print scripts: cat package.json | jq .scripts (or open package.json).
2. Check toolchain availability: python --version, make --version, gcc --version (as applicable).

Common CLI Output

npm ERR! code ELIFECYCLE

npm ERR! Exit status 1

npm ERR! command failed

npm ERR! errno 1

How npm executes the command

1. npm runs lifecycle scripts defined by packages during install.
2. If any script exits non-zero, npm surfaces ELIFECYCLE and stops the install.

Prevention Tips

• Keep build dependencies documented and installed on CI runners.
• Avoid heavy install-time scripts when possible, prefer build steps in CI.
• Pin Node/npm versions so script behavior stays consistent.

Where This Can Be Triggered

      er.message = pkg._id + ' ' + stage + ': `' + cmd + '`\n' +
                   er.message
      if (er.code !== 'EPERM') {
        er.code = 'ELIFECYCLE'
      }
      fs.stat(npm.dir, function (statError, d) {
        if (statError && statError.code === 'ENOENT' && npm.dir.split(path.sep).slice(-1)[0] === 'node_modules') {