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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/#cuda61 Servers

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24 Mar 2026
@gyara:matrix.org~綾 joined the room.02:48:43
@ccicnce113424:matrix.orgccicnce113424 https://github.com/NixOS/nixpkgs/pull/498612 02:49:58
@justbrowsing:matrix.orgKevin Mittman (jetlagged/UTC-7)
In reply to @ccicnce113424:matrix.org
https://github.com/NixOS/nixpkgs/pull/498612
Would it be helpful to have a repackaging guide for the GPU driver?
04:38:48
@glepage:matrix.orgGaétan Lepage

FYI: The default cudaPackages version was updated from 12.8 to 12.9

I tested core packages, but I would not be surprised if regressions were to show up. Feel free to report them here.

https://github.com/NixOS/nixpkgs/pull/498861

11:21:45
@ccicnce113424:matrix.orgccicnce113424
In reply to @justbrowsing:matrix.org
Would it be helpful to have a repackaging guide for the GPU driver?
Could you clarify what you mean by 'repackaging' and what specific scenarios the guide would cover?
16:54:40
@justbrowsing:matrix.orgKevin Mittman (jetlagged/UTC-7) Well for example there is a reference to bumblebee but https://docs.nvidia.com/datacenter/tesla/driver-installation-guide/latest/optimus-laptops-and-multi-gpu-desktop-systems.html 17:31:50
25 Mar 2026
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8) Gaétan Lepage: would you have the bandwidth to review https://github.com/NixOS/nixpkgs/pull/497675? 00:26:38
@glepage:matrix.orgGaétan Lepage For sure! The diff is fairly trivial. The bulk of the job will be the testing.
yorik.sar this is a good candidate for testing the new GitHub app on our infra.
00:34:39
@glepage:matrix.orgGaétan Lepage

FYI: The PR updating jax to 0.9.2 and the rest of the ecosystem with it (22 commits 🫠) has finally been merged! (after 2 months of efforts)

Changelogs:

https://github.com/NixOS/nixpkgs/pull/482118

00:37:22
@glepage:matrix.orgGaétan Lepage *

FYI: The PR updating jax to 0.9.2 and the rest of the ecosystem with it (22 commits 🫠) has finally been merged! (after 2 months of efforts)

Changelogs:

https://github.com/NixOS/nixpkgs/pull/482118

00:37:29
@glepage:matrix.orgGaétan Lepage *

FYI: The PR updating jax to 0.9.2 and the rest of the ecosystem with it (22 commits 🫠) has finally been merged! (after 2 months of efforts)

Please let me know if you notice any regression.

Changelogs:

https://github.com/NixOS/nixpkgs/pull/482118

00:39:56
26 Mar 2026
@ss:someonex.netSomeoneSerge (matrix works sometimes)/me mumbles aside: shoulda patched it out years ago04:15:10
4 Aug 2022
@winterqt:nixos.devWinter (she/her) joined the room.03:26:42
@winterqt:nixos.devWinter (she/her)(hi, just came here to read + respond to this.)03:28:52
@tpw_rules:matrix.orgtpw_ruleshey. i had previously sympathzied with samuela and like i said before had some of the same frustrations. i just edited my github comment to add "[CUDA] packages are universally complicated, fragile to package, and critical to daily operations. Nix being able to manage them is unbelievably helpful to those of us who work with them regularly, even if support is downgraded to only having an expectation of function on stable branches."03:29:14
@winterqt:nixos.devWinter (she/her)
In reply to @tpw_rules:matrix.org
i'm mildly peeved about a recent merging of something i maintain where i'm pretty sure the merger does not own the expensive hardware required to properly test the package. i don't think it broke anything but i was given precisely 45 minutes to see the notification before somebody merged it
ugh, 45 minutes? that's... not great. not to air dirty laundry but did you do what samuela did in the wandb PR and at least say that that wasn't a great thing to do? (not sure how else to word that, you get what i mean)
03:30:23
@tpw_rules:matrix.orgtpw_rulesno, i haven't yet, but i probably will03:31:03
@winterqt:nixos.devWinter (she/her) i admittedly did that with a PR once, i forget how long the maintainer was requested for but i merged it because multiple people reported it fixed the issue. the maintainer said "hey, don't do that" after and now i do think twice before merging. so it could help, is what i'm saying. 03:31:50
@tpw_rules:matrix.orgtpw_rulesi'm not sure what went wrong with the wandb PR anyway, i think it was just a boneheaded move on the maintainer's part03:32:10
@winterqt:nixos.devWinter (she/her)(it was also simple enough that it was fine and the maintainer said it looked good after)03:32:15
@tpw_rules:matrix.orgtpw_rules * i'm not sure what went wrong with the wandb PR anyway, i think it was just a boneheaded move on the merger's part03:32:19
@tpw_rules:matrix.orgtpw_rulesbut i thought most of the frustration was around packages which don't really involve CUDA breaking the fragile CUDA packages, and i'm not sure how the warning helps in this case. it's not like nixpkgs-review prints out the comments. maybe i'm wrong. but it is a legitimate problem03:34:19
@winterqt:nixos.devWinter (she/her)the frustration that i see is that people are touching packages that he maintains, am i missing further context here?03:35:09
@tpw_rules:matrix.orgtpw_rulesdid you ever see this? https://discourse.nixos.org/t/nixpkgss-current-development-workflow-is-not-sustainable/1874103:35:43
@winterqt:nixos.devWinter (she/her)oh yes i did03:35:49
@winterqt:nixos.devWinter (she/her)but that's not what the topic of this PR/the notice is, though?03:36:11
@winterqt:nixos.devWinter (she/her)this wouldn't help that03:36:14
@winterqt:nixos.devWinter (she/her)~~is that what you're saying and i'm just lagging behind~~03:36:27
@tpw_rules:matrix.orgtpw_rulesno it wouldn't, but it reads to me like that's the underlying problem and this is a manifestation which can be controlled more easily. not to put thoughts in people's head03:37:07
@winterqt:nixos.devWinter (she/her)

right

(what do you mean by that last sentence, you don't want to influence anyone's opinion on the matter by saying that?)

03:38:29

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