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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/#cuda63 Servers

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8 Feb 2026
@kaya:catnip.eekaya 𖤐 changed their profile picture.22:50:15
@glepage:matrix.orgGaƩtan Lepage

After some testing, our current torch version (2.9.0) does build against cuda 13.0, but not cuda 13.1:

/nix/store/42f8i6v4gfkvdimy9aczwqik3scl6dpw-cuda13.1-cuda_cccl-13.1.115/include/cub/device/dispatch/dispatch_radix_sort.cuh(1425): error: no operator "+=" matches these operands
            operand types are: at::native::<unnamed>::offset_t += const int64_t
          end_offsets_current_it += num_current_segments;

Context: https://github.com/NixOS/nixpkgs/pull/486717

23:01:20
@glepage:matrix.orgGaƩtan LepageI'll try to ship torch 2.10.0 ASAP, hoping that it is compatible with cuda 13.1 (which should unfortunately *23:02:38
@glepage:matrix.orgGaƩtan Lepage * I'll try to ship torch 2.10.0 ASAP, hoping that it is compatible with cuda 13.1 (which should unfortunately not be the case). 23:02:57
@niten:fudo.im@niten:fudo.im left the room.23:07:13
9 Feb 2026
@benesim:benesim.orgBenjamin IsbarnI'm not using any overlay for that purpose right now. Good point regarding the global override, will do that ;). So the cudaCapabilities would affect packages like the cudart, cublas etc. I guess i.e. what features it will consider available and thus use? the in theory this should yield better performance for the aforementioned libraries? 07:03:05

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