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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/#cuda57 Servers

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28 Nov 2025
@yorik.sar:matrix.orgyorik.sarI guess I’ll make another one for nixos-cuda.org :)15:05:22
@yorik.sar:matrix.orgyorik.sarHere it is: https://github.com/nixos-cuda/nixos-cuda.org/pull/215:12:12
29 Nov 2025
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemIs there anybody that knows how you add cuda stuff to a rust build?01:54:22
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemI have a rust build that is silently doing nothing when cuda isn't present, and not indicating in logs when it is being used or isn't01:54:37
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemLeads to https://github.com/alvr-org/ALVR/issues/279201:55:02
@ss:someonex.netSomeoneSerge (back on matrix) idk is it even about cuda? Any failing dlopens? @matthewcroughan:defenestrate.it: 04:30:26
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemI'm not sure, what do you think based on the issue?16:12:46
@matthewcroughan:defenestrate.itmatthewcroughan @fosdem Apparently people can get it to work by steam-run'ing the stuff they provide via github releases 16:13:09
@ss:someonex.netSomeoneSerge (back on matrix)Id_debuuuuuuuuuuuug16:49:33
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemYeah I can also get it working by steam-run'ing the github release17:01:30
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemcompiling onnxruntime takes forever though17:01:35
@matthewcroughan:defenestrate.itmatthewcroughan @fosdemso I'm doing that whilst compiling what I think could be a fix17:01:42
1 Dec 2025
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)Make sure you’re setting config.cudaCapabilities explicitly to speed up compilation12:39:34
@connorbaker:matrix.orgconnor (burnt/out) (UTC-8)

Packaging onnx/onnx-tensorrt/onnxruntime and getting them working for a range of cuda/cudnn/tensorrt releases is maddening oh my god:

  • Fix for GCC 11/NVCC's template processing https://github.com/nixos-cuda/cuda-legacy/commit/79c3026f1a761125b6faa609c5f9e56e723a4568
  • https://github.com/nixos-cuda/cuda-legacy/issues/6 since ONNX Runtime needs GCC > 11.1 and I need it to build with 11.4
  • I'm fairly certain I managed to get a build failure from ONNX Runtime with CUDA 11.8 because a reference to cuda_nvcc was held onto, so ONNX Runtime failed the build
21:32:54

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