Differences in yaml.dump output between my repository and pnpm repository

[L-Qun]

I use the same version of js-yaml, which is npm:@zkochan/js-yaml@0.0.6 , and the same configuration settings as pnpm:

const LOCKFILE_YAML_FORMAT = {
  blankLines: true,
  lineWidth: 1000,
  noCompatMode: true,
  noRefs: true,
  sortKeys: false,
};

However, the output of yaml.dump is different from what pnpm produces, for example:

yaml.dump(
      {
        lockfileVersion: "6.0",
        settings: { autoInstallPeers: true, excludeLinksFromLockfile: false },
        dependencies: {
          "@pnpm/util.lex-comparator": { specifier: "1.0.0", version: "1.0.0" },
          "js-yaml": {
            specifier: "npm:@zkochan/js-yaml@0.0.6",
            version: "/@zkochan/js-yaml@0.0.6",
          },
          "node-fetch": { specifier: "^2.7.0", version: "2.7.0" },
          ramda: {
            specifier: "npm:@pnpm/ramda@0.28.1",
            version: "/@pnpm/ramda@0.28.1",
          },
          "sort-keys": { specifier: "^4.2.0", version: "4.2.0" },
          "strip-bom": { specifier: "^4.0.0", version: "4.0.0" },
          "write-file-atomic": { specifier: "^5.0.1", version: "5.0.1" },
          "write-yaml-file": { specifier: "^5.0.0", version: "5.0.0" },
        },
        packages: {
          "/signal-exit@4.1.0": {
            resolution: {
              integrity:
                "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==",
            },
            engines: { node: ">=14" },
            dev: false,
          },
        },
      },
      LOCKFILE_YAML_FORMAT
    )

Running the same code in the pnpm repository and my own repository produces different results:
pnpm：

mine：

Where could the problem lie?

[L-Qun]

An unexpected line break in engines: {node: '>=14'}.