# OpenTelemetry tracing for Determinate Nix
**URL:** https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495
**Category:** Links
**Created:** [October 9, 2026, 3:27pm UTC](https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495 "2026-10-09T15:27:43Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@lucperkins](https://discourse.nixos.org/u/lucperkins)
#### Post date: [October 9, 2026, 3:27pm UTC](https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495/1 "2026-10-09T15:27:43Z")
> **[OpenTelemetry tracing for Determinate Nix](https://determinate.systems/blog/determinate-nix-opentelemetry/)**
>
> Determinate Nix now exports OpenTelemetry traces of evaluations, builds, substitutions, HTTP requests, and daemon connections to any OTLP backend, including Honeycomb, Grafana Tempo, Jaeger, and Datadog.
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### Author:  [@bitbloxhub](https://discourse.nixos.org/u/bitbloxhub)
#### Post date: [October 9, 2026, 4:47pm UTC](https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495/2 "2026-10-09T16:47:44Z")
Next up: Evaluation profiling?
> [@Profiling Lix with Tracy](https://discourse.nixos.org/t/profiling-lix-with-tracy/80382/3):
>
> Nice! Now that you mention it I remember reading about that at the time and didn’t use it much because I ran into the segfault issues mentioned. Since then I had completely forgotten about it though, so thanks for reminding me! I’ve not seen this segfault issue at all, so maybe it’s been fixed in tracy or maybe it’s a difference in the functions used (I’m using ZoneScoped instead of ZoneTransient). Regarding trace size, I think it really depends on how you are instrumenting things. You can de…
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### Author:  [@crertel](https://discourse.nixos.org/u/crertel)
#### Post date: [October 9, 2026, 5:31pm UTC](https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495/3 "2026-10-09T17:31:44Z")
This is great! Have y’all seen anything interesting out of it yet? Anything surprising?
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### Author:  [@lucperkins](https://discourse.nixos.org/u/lucperkins)
#### Post date: [October 9, 2026, 6:02pm UTC](https://discourse.nixos.org/t/opentelemetry-tracing-for-determinate-nix/80495/4 "2026-10-09T18:02:29Z")
Not yet really, mostly because what we’re doing to start out with is establishing an informational baseline that we can use to assess the impact of future changes. We expect the payoff to be on the horizon of months.