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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/#cuda58 Servers

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15 Jan 2026
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)Goddamn stubs and transitive symbol resolution17:33:35
* @connorbaker:matrix.orgconnor (burnt/out) (UTC-8) grumbles17:33:39
16 Jan 2026
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)PR to avoid rebuilding Nix itself whenever CUDA support is enabled: https://github.com/NixOS/nixpkgs/pull/48052400:01:13
@hexa:lossy.networkhexa (UTC+1)nix depends on onetbb?00:09:53
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)Yes, IIRC at least through blake302:23:54
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8) hexa (UTC+1): any additional thoughts on merging https://github.com/NixOS/nixpkgs/pull/480524? 18:16:50
@hexa:lossy.networkhexa (UTC+1)none18:30:44
@hexa:lossy.networkhexa (UTC+1)didn't test anything18:30:47
@hexa:lossy.networkhexa (UTC+1)just disables cuda support18:30:55
@hexa:lossy.networkhexa (UTC+1)what could go wrong?18:31:03
@ss:someonex.netSomeoneSerge (back on matrix)Wait, globally?20:00:50
@ss:someonex.netSomeoneSerge (back on matrix)This probably affects MPI and SLURM, and might be one of those libraries you're actually supposed to link dynamically and not how we do it20:26:15
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)I don't follow; IIRC hwloc is pulled in by those directly and would use it untouched22:48:00
17 Jan 2026
@glepage:matrix.orgGaétan Lepage FYI, the onnxruntime bump was merged! 🎉
https://github.com/NixOS/nixpkgs/pull/450587
09:33:45
@kaya:catnip.eekaya 𖤐Hey. Im working on upstreaming packages for exllama & tabbyapi. I would appreciate if somebody from here could review the PR :) https://github.com/NixOS/nixpkgs/pull/48112119:11:25
18 Jan 2026
@glepage:matrix.orgGaétan Lepage Anyone could give a second opinion on https://github.com/NixOS/nixpkgs/pull/474676 please? 09:48:06
@ss:someonex.netSomeoneSerge (back on matrix)This particular regression could've been avoided with autopatchelf. Maybe switch to that?12:08:40
@glepage:matrix.orgGaétan Lepage Just adding autoPatchelfHook you mean? 22:29:11
@ss:someonex.netSomeoneSerge (back on matrix)And removing --set-rpath23:40:44
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

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