node.js Get file through http request in chunks, then join them

Question

I am using range header to download mp4 file in parts like so:

const chunkFile = fs.createWriteStream('5a52e9ba-9328-11ec-b909-0242ac120002.mp4.chunk');

const downloadRequest = https.get({
    ...
    range: 'bytes=0-10000'
}, response => {
    ...
    response.pipe(chunkFile);
}

I do this in loop for all ranges and I end up with a bunch of chunk files in directory, I simplified it for the sake of the question. Then I join the chunks back into one file like so:

function joinChunks({chunkHashes, fileName}) {
  const outputFile = fs.createWriteStream(fileName);

  for (let i = 0, {length} = chunkHashes; i < length; i++) {
    const chunkData = fs.readFileSync(chunkHashes[i]);
    outputFile.write(chunkData);
    fs.unlinkSync(chunkHashes[i]);
  }
}

Was I naive to think it would work like that? The resulting file is the same size but it's broken. Is there a way to store raw data from http response in chunk files on disk, and then join that data to end up with the original file?