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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/#cuda59 Servers

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11 Nov 2025
@daniel-fahey:matrix.orgDaniel FaheyHopefully NVIDIA see some disruption and all this gets a bit more accessible for us normal people20:30:58
@arilotter:matrix.orgAri Lotterthat's the dream :)20:31:05
@daniel-fahey:matrix.orgDaniel FaheyAnd if you want to run Nixpkgs' vLLM on it, your colleagues will experience a slightly better CLI UX, lol20:40:40
@arilotter:matrix.orgAri Lotter huh the jax checkPhase is sloooooow 20:47:31
@daniel-fahey:matrix.orgDaniel FaheyFamously20:53:41
@daniel-fahey:matrix.orgDaniel FaheyDoesn't seem to work on Nixbuild.net either, lol https://github.com/NixOS/nixpkgs/issues/44582420:55:16
@daniel-fahey:matrix.orgDaniel FaheySince it seems you're in the mood to watch computer go brrrrr, I use this command to monitor (and record stats) during compiles nix-shell -p dool --run 'dool -tcms --swap --top-mem --top-cpu --display --output ~/vllm-build-stats.csv 10' 20:56:36
@daniel-fahey:matrix.orgDaniel Fahey *

Since it seems you're in the mood to watch computer go brrrrr, I use this command to monitor (and record stats) during compiles

nix-shell -p dool --run 'dool -tcms --swap --top-mem --top-cpu --display --output ~/vllm-build-stats.csv 10'
20:56:45
@daniel-fahey:matrix.orgDaniel Fahey

oh and if you're building JAX, that must mean you're not using Flox's new cache?

https://discourse.nixos.org/t/nix-flox-nvidia-opening-up-cuda-redistribution-on-nix/69189

extra-trusted-substituters = https://cache.flox.dev
extra-trusted-public-keys = flox-cache-public-1:7F4OyH7ZCnFhcze3fJdfyXYLQw/aV7GEed86nQ7IsOs=
20:58:20
@daniel-fahey:matrix.orgDaniel Fahey *

Oh, forgot, the command you'll want to post to the PR as a comment, use

nixpkgs-review pr 460701 --extra-nixpkgs-config '{ cudaSupport = true; allowUnfree = true;}' --post-result
``` thanks again!
20:59:12
@daniel-fahey:matrix.orgDaniel Fahey *

Oh, forgot, the command you'll want to post to the PR as a comment, use

nixpkgs-review pr 460701 --extra-nixpkgs-config '{ cudaSupport = true; allowUnfree = true;}' --post-result
```
thanks again!
20:59:23
@daniel-fahey:matrix.orgDaniel Fahey *

Oh, forgot, the command you'll want to post to the PR as a comment, use

nixpkgs-review pr 460701 --extra-nixpkgs-config '{ cudaSupport = true; allowUnfree = true;}' --post-result

thanks again!

20:59:34
@arilotter:matrix.orgAri Lotteroh shoot, seems i'm not21:09:03
@arilotter:matrix.orgAri Lottergonna restart 21:09:10
@arilotter:matrix.orgAri Lotterlol21:09:11
@daniel-fahey:matrix.orgDaniel FaheySaves A LOT of time, absolute game changer21:09:28
@arilotter:matrix.orgAri Lotterhere we go again :)21:11:13
@arilotter:matrix.orgAri Lotter nix-shell -p --run over nix run -- ? :p 21:12:32

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