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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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28 Aug 2025
@lt1379:matrix.orgLuntorch._inductor.exc.InductorError: FileNotFoundError: [Errno 2] No such file or directory: 'openssl' python312Packages.depyf is failing on the 2.8 bump PR in inductor errors looking for openssl. only 3.12, 3.13 depyf is fine. before the bump both 3.12 and 3.13 worked. 😕16:34:32
@apache8080:matrix.orgapache8080 I have machine where I enable the nvidia drivers and cudatoolkit but I don't see /dev/nvidia-uvm and when I lsmod I don't see the kernel module either 20:20:54
@apache8080:matrix.orgapache8080 * I have a machine where I enable the nvidia drivers and cudatoolkit but I don't see /dev/nvidia-uvm and when I lsmod I don't see the kernel module either 20:35:15
@apache8080:matrix.orgapache8080looks like it gets loaded after I run nvidia-smi20:37:51
@apache8080:matrix.orgapache8080weird20:37:53
@apache8080:matrix.orgapache8080 Guess I can just have it load via the boot.kernelModules 20:43:18
@connorbaker:matrix.orgconnor (he/him)That is odd -- I can say I've never had that problem, though I only ever use headless and this config: https://github.com/ConnorBaker/nixos-configs/blob/19f532114a86099795c21b6b5026cf25a42a4053/modules/nvidia.nix#L15-L2023:32:49
@philiptaron:matrix.orgPhilip Taron (UTC-8)Hey -- who here will I see in 🇨🇭 at NixCon!?23:35:08
@connorbaker:matrix.orgconnor (he/him)I'll be at Nix Con23:52:35
@philiptaron:matrix.orgPhilip Taron (UTC-8)Hell yeah23:53:08
@philiptaron:matrix.orgPhilip Taron (UTC-8) I am planning on having a table with a sign:

**THIS PERSON WANTS TO MERGE YOUR PR**
23:53:35
@philiptaron:matrix.orgPhilip Taron (UTC-8)And then I disappoint people when I get finiicky23:53:45
@philiptaron:matrix.orgPhilip Taron (UTC-8)* And then I disappoint people when I get finicky23:53:48
29 Aug 2025
@youthlic:mozilla.orgyouthlic joined the room.00:54:06
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@infinisil:matrix.orginfinisilSpoiler: We'll have a wrist band of a specific color you can wear to indicate that you're a Nixpkgs committer!08:36:26
@connorbaker:matrix.orgconnor (he/him)Oh god09:49:48
@connorbaker:matrix.orgconnor (he/him)You would make it easier for people to find us!?09:49:59
@infinisil:matrix.orginfinisilEntirely optional, so you can also be more covert :P10:17:11
@i.me:matrix.org@i.me:matrix.org left the room.14:25:41
@magic_rb:matrix.redalder.org@magic_rb:matrix.redalder.org changed their profile picture.19:27:31
30 Aug 2025
@connorbaker:matrix.orgconnor (he/him)TIL: https://github.com/NixOS/nixpkgs/blob/4dcad23452ff442ef0c79b29d67b3a19f9414d6e/pkgs/top-level/config.nix#L6212:45:32
@lt1379:matrix.orgLun
    If you are a developer, you should probably set this to at least`"versioned"`.

😨

14:49:09
31 Aug 2025
@lt1379:matrix.orgLun

Somehow the hash of cmake-build-preserve-PYTHONPATH changed between yesterday and today so torch is broken.

error: hash mismatch in fixed-output derivation '/nix/store/vywcjiyn0ix2yr132lvdb8wnqpcp0wyf-cmake-build-preserve-PYTHONPATH.drv':
         specified: sha256-7f9qtr7ljqjKdj3DqpcCTS0/Hr2AwOzOl/HA88yU3zI=
            got:    sha256-jtBpfGTu/GJjg3GlNz9DX9NXRo7F5I27eOKxjpz10u4=
17:06:24
@lt1379:matrix.orgLun I could put up a quick PR to fix the hash but not sure that's right, it might just happen again. 😅 cc Gaétan Lepage 17:29:01
@lt1379:matrix.orgLun * I could put up a quick PR to fix the hash but not sure that's right, it might just happen again. 😅 cc Gaétan Lepage
edit: solved in #438974
20:50:16
1 Sep 2025
@lt1379:matrix.orgLun changed their display name from lun to Lun.15:55:28
2 Sep 2025
@haras-unicorn:matrix.orgharas-unicorn joined the room.16:08:07
3 Sep 2025
@ghpzin:envs.netghpzin joined the room.09:30:34
4 Sep 2025
@connorbaker:matrix.orgconnor (he/him) I’ll be updating the CUDA slide tonight SomeoneSerge (Ever OOMed by Element) 15:17:01

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