sane_get_devices returns empty list, while scanimage -L does not

[lwessely]

While scanimage -L correctly lists one device: device brother5:bus1;dev1' is a Brother ADS-1700W USB scanner

sane_get_devices() returns an empty device list in the code below:

import { SANEStatus, libsane } from "sane-wasm";

libsane({
  debugSANE: true,
  debugUSB: true,
  debugFunctionCalls: true,
}).then(async (sane) => {
  const init = sane.sane_init();
  console.log(init.status === SANEStatus.GOOD);

  const state = sane.sane_get_state();
  console.log(state);

  let { status, devices } = await sane.sane_get_devices();
  console.log(status === SANEStatus.GOOD, devices);

  await sane.sane_exit();
});

The output of the code on my machine is

true
{
  initialized: true,
  version_code: 16842753,
  version: { major: 1, minor: 1, build: 1 },
  open: false
}
true []

I would expect the device list to contain all devices listed by scanimage -L, instead of being empty.

I am on node v21.7.0, on EndeavourOS (an Arch-based Linux distro).