Install dependencies reproducibly in CI with pnpm install --frozen-lockfile or pnpm ci

domain: pnpm.io · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. In CI, run pnpm install --frozen-lockfile: pnpm won't generate or update the lockfile and fails if pnpm-lock.yaml is out of sync with the manifests or missing.
  2. You usually don't need the flag in CI: --frozen-lockfile defaults to true when a CI environment is detected (via the ci-info library: CI, CONTINUOUS_INTEGRATION, BUILD_NUMBER, RUN_ID env vars) and a lockfile is present. Pass it explicitly for clarity.
  3. On pnpm v11+, prefer pnpm ci (aliases: clean-install, install-clean, ic) for fully clean reproducible builds — it runs pnpm clean and then pnpm install --frozen-lockfile.
  4. Speed up repeat CI runs with --prefer-offline (bypasses staleness checks for cached data, fetches only missing data) or force full offline mode with --offline (fails if a package isn't already in the store).
  5. Docs: https://pnpm.io/cli/install and https://pnpm.io/cli/ci

Known gotchas

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