# Determinate Nix changelog: security fixes, OpenTelemetry tracing, baked flakes, fiber-based parallel evaluation, and more

**URL:** https://discourse.nixos.org/t/determinate-nix-changelog-security-fixes-opentelemetry-tracing-baked-flakes-fiber-based-parallel-evaluation-and-more/80652
**Category:** Links
**Created:** [October 20, 2026, 3:04pm UTC](https://discourse.nixos.org/t/determinate-nix-changelog-security-fixes-opentelemetry-tracing-baked-flakes-fiber-based-parallel-evaluation-and-more/80652 "2026-10-20T15:04:51Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![lucperkins](https://discourse.nixos.org/user_avatar/discourse.nixos.org/lucperkins/32/2708_2.png) [@lucperkins](https://discourse.nixos.org/u/lucperkins)
#### Post date: [October 20, 2026, 3:04pm UTC](https://discourse.nixos.org/t/determinate-nix-changelog-security-fixes-opentelemetry-tracing-baked-flakes-fiber-based-parallel-evaluation-and-more/80652/1 "2026-10-20T15:04:51Z")

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> **[Changelog: security fixes, OpenTelemetry tracing, baked flakes, fiber-based...](https://determinate.systems/blog/changelog-determinate-nix-3-23-3/)**
>
> Determinate Nix 3.23.3 fixes four security vulnerabilities, exports OpenTelemetry traces, introduces baked flakes that require almost no evaluation, fixes several garbage collector races, moves parallel evaluation onto fibers, makes builtins.wasm...