yarnpkg/yarn · error · MessageError

manifestNameBlacklisted

Error message

manifestNameBlacklisted

What it means

Error "manifestNameBlacklisted" thrown in yarnpkg/yarn.

Source

Thrown at src/util/normalize-manifest/validate.js:73

  if (typeof name === 'string') {
    if (isRoot && isBuiltinModule(name)) {
      warn(reporter.lang('manifestBuiltinModule', name));
    }

    // cannot start with a dot
    if (name[0] === '.') {
      throw new MessageError(reporter.lang('manifestNameDot'));
    }

    // cannot contain the following characters
    if (!isValidPackageName(name)) {
      throw new MessageError(reporter.lang('manifestNameIllegalChars'));
    }

    // cannot equal node_modules or favicon.ico
    const lower = name.toLowerCase();
    if (lower === 'node_modules' || lower === 'favicon.ico') {
      throw new MessageError(reporter.lang('manifestNameBlacklisted'));
    }
  }

  // validate license
  if (isRoot && !info.private) {
    if (typeof info.license === 'string') {
      const license = info.license.replace(/\*$/g, '');
      if (!isValidLicense(license)) {
        warn(reporter.lang('manifestLicenseInvalid'));
      }
    } else {
      warn(reporter.lang('manifestLicenseNone'));
    }
  }

  // validate strings
  for (const key of strings) {
    const val = info[key];

View on GitHub (pinned to c2dda503f3)

Solutions

1. Rename the package: "node_modules" and "favicon.ico" are reserved names and cannot be used. Pick any other valid name in package.json.

Example fix

"name": "node_modules" -> "my-lib"

When it happens

Trigger: A manifest name matches the reserved/blacklisted names list during normalization validation in src/util/normalize-manifest/validate.js.

Common situations: Occurs when package.json 'name' is a reserved word such as 'node_modules' or 'favicon.ico'.

AI-assisted analysis of yarnpkg/yarn@c2dda503f3 (2026-08-13). Data as JSON: /api/errors/a2b58e13ca950210. Report an issue: GitHub.