npm EBADENGINE "Unsupported engine" in CI - Fix Node Version Mismatch

EBADENGINE means a package declares an engines range that the current Node or npm version does not satisfy. It warns by default but can hard-fail when engine-strict is on.

What this error means

During install npm prints EBADENGINE listing the package, the wanted Node range, and the current version. With engine-strict enabled the install aborts instead of warning.

npm

npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: 'vite@5.0.0',
npm WARN EBADENGINE   required: { node: '^18.0.0 || >=20.0.0' },
npm WARN EBADENGINE   current: { node: 'v16.20.2', npm: '8.19.4' }
npm WARN EBADENGINE }

Common causes

The CI Node version is older than dependencies require

The runner uses a Node major below the engines range a dependency declares, so npm flags the mismatch.

engine-strict turns the warning into a failure

With engine-strict=true in .npmrc, an unsupported engine aborts the install rather than warning.

How to fix it

Pin a supported Node version in CI

Set the Node version in the setup step to a value inside the required range.
Re-run the install.

Workflow

- uses: actions/setup-node@v4
  with:
    node-version: 20

How to prevent it

Declare your own engines field, pin the Node version in setup-node, and keep it inside the intersection of every dependency engines range so installs stay clean.