Build failure on WSL Ubuntu but not on OS/X

Describe the bug
I've tried to freeze https://github.com/engageLively/galyleo-dashboard, and the freeze works on my Mac but repeatedly fails on WSL, with the error message:

TypeError: Could not load https://jspm.dev/immutable@4.0.0-rc.12: fetch failed
    at Object.fetch (node:internal/deps/undici/undici:11457:11)
    at async WebDAVResource.read (file:///home/rick/lively.next/lively.resources/src/http-resource.js:232:17)
    at async fetchFile (/home/rick/lively.next/lively.freezer/src/resolvers/node.cjs:150:14)
    at async Object.load (/home/rick/lively.next/lively.freezer/src/resolvers/node.cjs:165:11)
    at async LivelyRollup.load (file:///home/rick/lively.next/lively.freezer/src/bundler.js:581:13)
    at async file:///home/rick/lively.next/lively.next-node_modules/rollup/2.70.2/dist/es/shared/rollup.js:22093:83
    at async Queue.work (file:///home/rick/lively.next/lively.next-node_modules/rollup/2.70.2/dist/es/shared/rollup.js:21677:32) {
  cause: SocketError: other side closed
      at TLSSocket.onSocketEnd (node:internal/deps/undici/undici:9689:26)
      at TLSSocket.emit (node:events:525:35)
      at endReadableNT (node:internal/streams/readable:1359:12)
      at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
    code: 'UND_ERR_SOCKET',
    socket: {
      localAddress: '172.19.148.218',
      localPort: 34326,
      remoteAddress: undefined,
      remotePort: undefined,
      remoteFamily: undefined,
      timeout: undefined,
      bytesWritten: 190,
      bytesRead: 0
    }
  },
  code: 'PLUGIN_ERROR',
  plugin: 'commonjs--resolver',
  hook: 'resolveId',

It was working fine until yesterday, but something is wrong today. I tried rebooting just in case it was system load. Same version of Lively

To Reproduce

1. Pull https://github.com/engageLively/galyleo-dashboard
2. On WSL, in the root directory, run npm build

Screenshots
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Setup
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• Windows
• Linux

Version: Please paste the lively.next commit on which the problem occurred here (use the copy button of the Version Checker in the bottom left corner).
c725a776b26bd744331765a4881ba4c0557d2fea

Start by reproducing npm build in the galyleo-dashboard root on WSL Ubuntu and compare it with the working macOS setup. Read lively.resources/src/http-resource.js, lively.freezer/src/resolvers/node.cjs, and lively.freezer/src/bundler.js around the reported stack frames. Done means the freeze completes successfully on WSL for the reported commit, with the failure cause identified and covered by an appropriate regression check.