| 25 Jan 2026 |
Ari Lotter | https://github.com/NixOS/nixpkgs/pull/471394 finally got a working fix in, just using appendRunpaths :) | 01:52:35 |
| 26 Jan 2026 |
| Mohamed Hisham Abdelzaher joined the room. | 21:10:42 |
connor (burnt/out) (UTC-8) | Set it up to merge, apologies for how long that took. Thank you for the fix, Ari :) | 23:26:40 |
Gaétan Lepage | Thanks for the reviews connor (burnt/out) (UTC-8).
Btw, if you have a minute for the cuda-bindings PR, that would help me unblocking torch.
https://github.com/NixOS/nixpkgs/pull/482638 | 23:36:41 |
connor (burnt/out) (UTC-8) | Just reviewed, looks good. You might need to update the PR description to change python3Packages.cuda-bindings: init at 13.1.1 though | 23:40:28 |
Gaétan Lepage | Thanks! | 23:46:49 |
| 29 Jan 2026 |
| @oh_yeah:matrix.org left the room. | 00:14:51 |
Gaétan Lepage | Hello everyone!
I want to share some news regarding the progress yorik.sar and I made on the infra. Some were already communicated, but it doesn't work to summarize everything.
- We have been building and caching all
cudaSupport-sensitive nixpkgs packages on both stable and unstable nixpkgs channels on our Hydra instance for a few weeks. You can check the cuda-packages-unstable and cuda-packages-stable jobsets.
- All
gpuCheck instances across nixpkgs are now automatically and exhaustively collected and built in Hydra as well. See the cuda-gpu-checks-unstable and cuda-gpu-checks-stable jobsets. For a reminder, gpuChecks are derivations that run some package tests that need access to a physical GPU.
- Regarding package maintenance and updates, recent times were hectic as nixpkgs received several breaking changes since the beginning of 2026 (recursing into
python314Packages, update to GCC 15 and more staging-next treats). Besides, here are notable ones:
- This is still an idea, but my plan is to create two cuda-specific nix channels:
nixos-unstable-cuda and nixos-stable-cuda where we could ensure that a curated set of package builds and tests are succesful (release blockers). I would be glad to hearing your feedback on this idea.
We're trying our best to move things forward as fast as possible. Unfortunately, time and compute resources are limited, so it's never fast enough 😅
Have a nice day! | 09:26:20 |
Gaétan Lepage | * Hello everyone!
I want to share some news regarding the progress yorik.sar, connor (burnt/out) (UTC-8), SomeoneSerge (back on matrix) and I made recently. Some were already communicated, but it doesn't work to summarize everything.
- We have been building and caching all
cudaSupport-sensitive nixpkgs packages on both stable and unstable nixpkgs channels on our Hydra instance for a few weeks. You can check the cuda-packages-unstable and cuda-packages-stable jobsets.
- All
gpuCheck instances across nixpkgs are now automatically and exhaustively collected and built in Hydra as well. See the cuda-gpu-checks-unstable and cuda-gpu-checks-stable jobsets. For a reminder, gpuChecks are derivations that run some package tests that need access to a physical GPU.
- Regarding package maintenance and updates, recent times were hectic as nixpkgs received several breaking changes since the beginning of 2026 (recursing into
python314Packages, update to GCC 15 and more staging-next treats). Besides, here are notable ones:
- This is still an idea, but my plan is to create two cuda-specific nix channels:
nixos-unstable-cuda and nixos-stable-cuda where we could ensure that a curated set of package builds and tests are succesful (release blockers). I would be glad to hearing your feedback on this idea.
We're trying our best to move things forward as fast as possible. Unfortunately, time and compute resources are limited, so it's never fast enough 😅
Have a nice day! | 09:26:59 |
Gaétan Lepage | * Hello everyone!
I want to share some news regarding the progress yorik.sar, connor (burnt/out) (UTC-8), SomeoneSerge (back on matrix) and I made recently. Some were already communicated, but it doesn't work to summarize everything.
- We have been building and caching all
cudaSupport-sensitive nixpkgs packages on both stable and unstable nixpkgs channels on our Hydra instance for a few weeks. You can check the cuda-packages-unstable and cuda-packages-stable jobsets.
- All
gpuCheck instances across nixpkgs are now automatically and exhaustively collected and built in Hydra as well. See the cuda-gpu-checks-unstable and cuda-gpu-checks-stable jobsets. For a reminder, gpuChecks are derivations that run some package tests that need access to a physical GPU.
- Regarding package maintenance and updates, recent times were hectic as nixpkgs received several breaking changes since the beginning of 2026 (recursing into
python314Packages, update to GCC 15 and more staging-next treats). Besides, here are notable ones:
- This is still an idea, but my plan is to create two cuda-specific nix channels:
nixos-unstable-cuda and nixos-25.11-cuda where we could ensure that a curated set of package builds and tests are succesful (release blockers). I would be glad to hearing your feedback on this idea.
We're trying our best to move things forward as fast as possible. Unfortunately, time and compute resources are limited, so it's never fast enough 😅
Have a nice day! | 09:27:55 |
hexa | nixos-25.11 should be fairly cheap on rebuilds | 14:12:03 |
hexa | the opencv 4.13.0 blocks openvino updates | 14:12:22 |
hexa | * the opencv 4.13.0 update blocks openvino updates | 14:12:27 |
hexa | * the opencv 4.13.0 update is required to update openvino too | 14:12:44 |
| Gilles Poncelet joined the room. | 22:07:17 |
| 30 Jan 2026 |
connor (burnt/out) (UTC-8) | Can someone review/merge https://github.com/NixOS/nixpkgs/pull/485211? | 02:20:04 |
connor (burnt/out) (UTC-8) | Also coming up: https://github.com/NixOS/nixpkgs/pull/485208 | 03:10:33 |
| matthewcroughan @fosdem changed their display name from matthewcroughan to matthewcroughan @fosdem. | 13:50:24 |
| 31 Jan 2026 |
Bryan Honof | Hey hey, live from FOSDEM here. Is there an easy way to generate those manifest JSON files? Or is that a fully manual process? | 16:26:02 |
Bryan Honof | Nevermind, should've read the READEME. :) | 16:26:59 |
connor (burnt/out) (UTC-8) | Oh god is it up to date | 16:32:45 |
connor (burnt/out) (UTC-8) | Those manifests should come directly from NVIDIA (but they need a new line added to comply with the Nixpkgs formatter) | 16:33:13 |
| 1 Feb 2026 |
| Fernando Rodrigues changed their display name from SigmaSquadron to Fernando Rodrigues. | 10:43:22 |
Gaétan Lepage | OpenCV 4.13.0 bump has just been merged! | 22:56:18 |
| 4 Aug 2022 |
| Winter (she/her) joined the room. | 03:26:42 |
Winter (she/her) | (hi, just came here to read + respond to this.) | 03:28:52 |
tpw_rules | hey. 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 |
Winter (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 | no, i haven't yet, but i probably will | 03:31:03 |
Winter (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 |