[Bug]: `@ledgerhq/errors` crashes when imported from an ESM module

[alcuadrado]

Impacted Library name

@ledgerhq/errors

Impacted Library version

11.11.0

Describe the bug

Importing this library from an ESM module leads to import errors that crash your application. I believe it's due to a misconfiguration of typescript or your build system.

Expected behavior

It shouldn't throw on imports.

Additional context

Here's a minimal reproduction: https://github.com/alcuadrado/ledgerhq-errors-repro

[alcuadrado]

This issue wasn't present in 6.31.0, 6.32.0-nightly.20260319030508 is the first version that introduced it, and it's still present in the latest nightly (6.33.0-nightly.20260401093636)

[andrevmatos]

Come on, extension-less ESM imports, in 2026?

ledger-live/libs/ledgerjs/packages/errors/src/index.ts

Lines 1 to 7 in c95b514

	import {
	serializeError,
	deserializeError,
	createCustomErrorClass,
	addCustomErrorDeserializer,
	LedgerErrorConstructor,
	} from "./helpers";

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label, comment, or consider closing it.

[andrevmatos]

Not stale; this is preventing pure node ESM on recent versions