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NixOS CUDA

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CUDA packages maintenance and support in nixpkgs | https://github.com/orgs/NixOS/projects/27/ | https://nixos.org/manual/nixpkgs/unstable/#cuda63 Servers

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28 May 2026
@glepage:matrix.orgGaétan Lepage Fixes onnxruntime too: https://github.com/NixOS/nixpkgs/pull/525369 22:11:56
29 May 2026
@berrij:fairydust.spaceBerriJHere you go: https://uni-duisburg-essen.sciebo.de/s/r44i7DSJJWBoBag The password is: 123404:11:59
@glepage:matrix.orgGaétan Lepage

Here's a good one 🥲🐸

https://github.com/NixOS/nixpkgs/pull/525504
cc Kevin Mittman (UTC-7)

09:34:51
@glepage:matrix.orgGaétan Lepage *

Here's a good one 🥲🐸

https://github.com/NixOS/nixpkgs/pull/525504
cc Kevin Mittman (UTC-7)

(Maybe I'm just holding it wrong and I badly packaged apex)

09:39:24
30 May 2026
@justbrowsing:matrix.orgKevin Mittman (UTC-7)Yeah I wish it was a consistent interface, have run into similar elsewhere02:13:22
@glepage:matrix.orgGaétan LepageUnfortunately, my fix now breaks the build with our default set of capabilities08:51:20
@613fd0ba9f744876:matrix.orgFlakeyForger joined the room.18:10:46
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1 Jun 2026
@glepage:matrix.orgGaétan LepageMerged!18:28:28
2 Jun 2026
@bjth:matrix.orgBryan HonofWould it be worth backporting that one to 26.05?07:47:09
@glepage:matrix.orgGaétan Lepage

Tehcnically yes, but the team is currently

  • under staffed
  • lacking compute, both for CI and development/testing

So we're doing our best to keep the lights on and things somehow up to date. All the extra, as much as we'd love to do (and I truly do) is currently out of scope.

(Having said that, backporting this one to 26.05 shouldn't be too bad. Don't hesitate to open a PR, I'll try to do it today otherwise)

07:58:19
@glepage:matrix.orgGaétan Lepage Opened the backport PR :) : https://github.com/NixOS/nixpkgs/pull/527055 08:57:59
@glepage:matrix.orgGaétan Lepage *

Opened the backport PR :) : https://github.com/NixOS/nixpkgs/pull/527055

Testing is ongoing

08:58:09
@bjth:matrix.orgBryan HonofThank you!11:52:29
@bjth:matrix.orgBryan Honof

Is it possible that CCCL got renamed from cuda_cccl to just cccl in the manifests?

diff --git a/pkgs/development/cuda-modules/packages/cccl.nix b/pkgs/development/cuda-modules/packages/cccl.nix
new file mode 100644
index 0000000000..1f863f770a
--- /dev/null
+++ b/pkgs/development/cuda-modules/packages/cccl.nix
@@ -0,0 +1,1 @@
+{ cuda_cccl }: cuda_cccl
diff --git a/pkgs/development/cuda-modules/packages/cuda_cccl.nix b/pkgs/development/cuda-modules/packages/cuda_cccl.nix
index a10f165f25..78c5274686 100644
--- a/pkgs/development/cuda-modules/packages/cuda_cccl.nix
+++ b/pkgs/development/cuda-modules/packages/cuda_cccl.nix
@@ -7,7 +7,8 @@
 }:
 buildRedist {
   redistName = "cuda";
-  pname = "cuda_cccl";
+  # Renamed from "cuda_cccl" to "cccl" in the CUDA 13.3 redist manifest.
+  pname = if cudaAtLeast "13.3" then "cccl" else "cuda_cccl";

   # Restrict header-only packages to a single output.
   # Also, when using multiple outputs (i.e., `out`, `dev`, and `include`), something isn't being patched correctly,
11:53:54
@glepage:matrix.orgGaétan Lepage *

Tehcnically yes, but the team is currently

  • under staffed
  • lacking compute, both for CI and development/testing

So we're doing our best to keep the lights on and things somehow up to date. All the extras, as much as we'd love to work on them (and I truly do), are currently out of scope.

(Having said that, backporting this one to 26.05 shouldn't be too bad. Don't hesitate to open a PR, I'll try to do it today otherwise)

12:24:24
@connorbaker:matrix.orgconnor (he/him)Anything is possible 🫩14:57:57
@connorbaker:matrix.orgconnor (he/him)I’ll try to take a look later14:58:06
3 Jun 2026
@justbrowsing:matrix.orgKevin Mittman (UTC-7)Yes cuda_cccl is renamed to cccl and now version matched to the github releases01:23:57
@justbrowsing:matrix.orgKevin Mittman (UTC-7) 13 > 2 01:24:50
@humblefool2005:matrix.orgDarshan Thakare joined the room.12:10:58
@seudonym:matrix.orgWahid Khan joined the room.17:49:55
@seudonym:matrix.orgWahid Khanhello, i'm new to nix. in the process of learning to hopefully contribute one day17:51:16
@seudonym:matrix.orgWahid Khanspecifically cuda, as im in robotics17:51:28
@glepage:matrix.orgGaétan Lepage Hi! Welcome :)
Feel free to ask questions, even the dumb ones.
Getting used to nix, especially for CUDA stuff is not extremely easy, but once you're in, it really does make your life easier.
Also, if you're willing to contribute, be sure that there is a lot to do and to improve over here. I'll be glad to onboard/mentor you if needed.
21:54:17
@glepage:matrix.orgGaétan Lepage

🔥 PyTorch 2.12.0 (+ triton 3.7.0 + torchcodec 0.14.0) 🔥

That one was painful... Many thanks to all the reviewers, to Lun for handling the ROCm regressions and especially @NickCao for daring to push the button.


Changelog: https://github.com/pytorch/pytorch/releases/tag/v2.12.0
PR: https://github.com/NixOS/nixpkgs/pull/519925
PR tracker: https://nixpk.gs/pr-tracker.html?pr=519925


As usual, please report any regression here (or by email)

⚠️ Due to the limited hardware availability, testing is best-effort. It will probably break some downstream consumers.
Also, for the same reason, nothing could be properly built/tested on ARM, especially with CUDA support.

23:38:49
4 Jun 2026
@callmeecho:matrix.orgEcho changed their profile picture.04:23:45
@seudonym:matrix.orgWahid Khan thanks a lot! i am here to learn 10:41:22

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