Bug: `os.platform() == 'windows'` will never match

[dhermes]

https://nodejs.org/docs/latest-v16.x/api/os.html#osplatform

Returns a string identifying the operating system platform. The value is set at compile time. Possible values are 'aix', 'darwin', 'freebsd', 'linux', 'openbsd', 'sunos', and 'win32'.