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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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SenderMessageTime
12 Feb 2026
@glepage:matrix.orgGaétan LepageOk thanks! I should get a notification when you'll have rebased.07:52:34
13 Feb 2026
@hoplophfeil:matrix.orghoplopf joined the room.10:21:48
14 Feb 2026
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15 Feb 2026
@matthewcroughan:defenestrate.itmatthewcroughan changed their display name from matthewcroughan @fosdem to matthewcroughan.18:05:52
@lt1379:matrix.orgLun torch's magma backend is being deprecated https://github.com/pytorch/pytorch/pull/172823/changes
Do we want to drop it as an input to torch soon? Gaétan Lepage
23:01:56
16 Feb 2026
@hatimthayyil:matrix.orgHatim joined the room.01:01:14
@glepage:matrix.orgGaétan LepageWell, we will follow what upstream says. Is this warning shipped as part of 2.10.0?21:45:18
@kslad:unredacted.orgkslad joined the room.23:40:04
17 Feb 2026
@lt1379:matrix.orgLuntoo late for 2.1000:02:10
@glepage:matrix.orgGaétan LepageOk, I guess we'll just wait for the next release then?20:09:10
@glepage:matrix.orgGaétan Lepage* Ok, I guess we'll just wait for the next release then.20:09:12
20 Feb 2026
@youthlic:mozilla.orgyouthlic changed their profile picture.08:15:56
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21 Feb 2026
@justbrowsing:matrix.orgKevin Mittman (UTC-8)Is there an hardcap on input tarball size? Considering splitting a particularly large one into multiple components01:54:03
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)Not that I’m aware of. But such a change would require some rework on the Nixpkgs side to recombine sources or know which components to pick (which isn’t necessarily bad, just a thing that would need to happen).17:20:26
22 Feb 2026
@hazeslate37:matrix.orgHaze joined the room.02:54:28
24 Feb 2026
@bot-wxt1221:matrix.orgBot_wxt1221Why nvidia-open beta is still broken?01:30:50
@bot-wxt1221:matrix.orgBot_wxt1221None cares it?01:30:58
@justbrowsing:matrix.orgKevin Mittman (UTC-8)Broken in what way? Which version is it 590.48.01 ?03:13:32
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)The drivers are maintained by a different team -- we are the NixOS CUDA team04:19:31
@hexa:lossy.networkhexa (UTC+1)is partially opting into cuda support even a supported thing? https://github.com/NixOS/nixpkgs/pull/489829/changes#r284190233515:40:55
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)It is not16:51:10
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)That’s partly why it’s a global config option Otherwise people get inconsistent closures and failure modes that make me want to yell at people :(16:51:31
@hexa:lossy.networkhexa (UTC+1)Thanks!16:52:11
@glepage:matrix.orgGaétan LepageRedacted or Malformed Event23:20:03
@glepage:matrix.orgGaétan Lepage

🔥 PyTorch 2.10.0 🔥

Changelog: https://github.com/pytorch/pytorch/releases/tag/v2.10.0
PR: https://github.com/NixOS/nixpkgs/pull/484881
PR tracker: https://nixpkgs-tracker.ocfox.me/?pr=484881

This one took quite a while to bring to nixpkgs, and I'm glad to have finally gotten it merged!

Some basic testing has been done (basic builds, cudaSupport builds, some gpuChecks).
However, exhaustively building and testing all the downstream dependencies isn't feasible (at least without more time and hardware).
-> Please, don't hesitate to report any breakage in this channel, and feel free to ping me as well.

Thanks a lot to everyone who helped, and more generally to everyone else for your patience.

23:30:01
@glepage:matrix.orgGaétan Lepage *

🔥 PyTorch 2.10.0 (+ triton 3.6.0) 🔥


Changelog: https://github.com/pytorch/pytorch/releases/tag/v2.10.0
PR: https://github.com/NixOS/nixpkgs/pull/484881
PR tracker: https://nixpkgs-tracker.ocfox.me/?pr=484881


This one took quite a while to bring to nixpkgs, and I'm glad to have finally gotten it merged!

Some basic testing has been done (basic builds, cudaSupport builds, some gpuChecks).
However, exhaustively building and testing all the downstream dependencies isn't feasible (at least without more time and hardware).
-> Please, don't hesitate to report any breakage in this channel, and feel free to ping me as well.

Thanks a lot to everyone who helped, and more generally to everyone else for your patience.

23:32:32
25 Feb 2026
@hugo:okeso.euHugo

Related to PyTorch but not to 2.10, it looks like my CI cannot build it since yesterday morning (it was still python3.13-torch-2.9.1) 🤔
Torch 2.10.0 does not solve that issue.

I build with:

      run: "cd nixpkgs-master\n  nix-build -I nixpkgs=. --arg config '{ allowUnfree\
        \ = true; cudaSupport = true; openclSupport = true; rocmSupport = false;}'\
        \ --option allow-import-from-derivation false --max-jobs 1 -A python313Packages.torch"

Here is the last part of my build log (after 3h12 of build).
https://pad.lassul.us/s/xWhnOmbeo2#

Any idea what could be the cause?

15:20:41
@hexa:lossy.networkhexa (UTC+1)log looks incomplete15:21:09
@hugo:okeso.euHugoHedgeDoc does not allow me to copy the complete log15:21:26

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