vercel/next.js · error

Found lockfile missing swc dependencies,

Error message

Found lockfile missing swc dependencies,

What it means

patchIncorrectLockfile compares the parsed lockfile against the expected @next/swc platform packages; when entries are missing it warns, then either patches the lockfile automatically when run locally or, on CI, instructs the user to run next locally so it can patch.

Source

Thrown at packages/next/src/lib/patch-incorrect-lockfile.ts:139

      if (!pkgPrefix) {
        // unable to locate the next package so bail
        return
      }
    }

    for (const pkg of expectedSwcPkgs) {
      if (
        (shouldPatchDependencies && !lockfileParsed.dependencies[pkg]) ||
        (shouldPatchPackages && !lockfileParsed.packages[`${pkgPrefix}${pkg}`])
      ) {
        missingSwcPkgs.push(pkg)
      }
    }
    if (missingSwcPkgs.length === 0) {
      return
    }
    Log.warn(
      `Found lockfile missing swc dependencies,`,
      isCI ? 'run next locally to automatically patch' : 'patching...'
    )

    if (isCI) {
      // no point in updating in CI as the user can't save the patch
      return
    }
    const pkgsData = await Promise.all(
      missingSwcPkgs.map((pkg) => fetchPkgInfo(pkg))
    )

    for (let i = 0; i < pkgsData.length; i++) {
      const pkg = missingSwcPkgs[i]
      const pkgData = pkgsData[i]

      if (shouldPatchDependencies) {
        patchDependency(pkg, pkgData)

View on GitHub (pinned to 0eb3775416)

Solutions

1. Run install again so the lockfile can be patched and @next/swc platform dependencies downloaded.

When it happens

Trigger: Thrown at packages/next/src/lib/patch-incorrect-lockfile.ts:139 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of vercel/next.js@0eb3775416 (2026-08-19). Data as JSON: /api/errors/4b63b30ff541bcdb. Report an issue: GitHub.