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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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2 Nov 2025
@glepage:matrix.orgGaétan LepageI'm about to push a commit that handles that too. I'm compiling rn.16:42:28
@glepage:matrix.orgGaétan Lepage Rebuilt onnxruntime. It now doesn't depend on cuda_nvcc at runtime.
I'm now rebuilding firefox which should not have cuda_nvcc in its closure anymore.
17:07:36
@glepage:matrix.orgGaétan Lepage

😭 cudaPackages.cuda_cudart depends on cudaPackages.cuda_nvcc at runtime too!!!

Not because of a path leak in the binary this time, just because nvcc is in cudart's propagatedBuildInputs (I think?)

❯ nix why-depends --precise $(nom-build --arg config '{ allowUnfree = true; cudaSupport = true; }' -A firefox-unwrapped) $(nom-build --arg config '{ allowUnfree = true; cudaSupport = true; }' -A cudaPackages.cuda_nvcc)
Finished at 18:16:53 after 1s
Finished at 18:16:53 after 0s
/nix/store/yy1z5y3iql9r4kpslxnjdwcygx52ssl8-firefox-unwrapped-144.0.2
└───lib/firefox/libonnxruntime.so: …st be specified....../nix/store/jk4a7v44fc83ykc15b31r4m21yqc92sp-onnxruntime-1.22.2/lib/.....onn…
    → /nix/store/jk4a7v44fc83ykc15b31r4m21yqc92sp-onnxruntime-1.22.2
    └───lib/libonnxruntime_providers_cuda.so: …nn-9.13.0.50-lib/lib:/nix/store/80x699lyc99dahf85iqdv6z1f0vv6vz2-cuda12.8-cuda_cudart-12.8.90/li…
        → /nix/store/80x699lyc99dahf85iqdv6z1f0vv6vz2-cuda12.8-cuda_cudart-12.8.90
        └───nix-support/propagated-build-inputs: …fhjm-setup-cuda-hook /nix/store/ygd3s9zm1pf77n3q3ac63v58www5scbc-cuda12.8-cuda_nvcc-12.8.93 /nix…
            → /nix/store/ygd3s9zm1pf77n3q3ac63v58www5scbc-cuda12.8-cuda_nvcc-12.8.93
18:19:31
@glepage:matrix.orgGaétan Lepage Actually, rebasing my PR on top of [SomeoneSerge (back on matrix)'s](https://github.com/NixOS/nixpkgs/pull/457424) worked! 20:15:56
@glepage:matrix.orgGaétan Lepage * Actually, rebasing my PR on top of Serge's worked! 20:16:12
3 Nov 2025
@connorbaker:matrix.orgconnor (he/him)Are they good to go or do they need more testing?00:25:39
@glepage:matrix.orgGaétan Lepage According to me, they are both good to go.
Let's wait for SomeoneSerge (back on matrix)'s ACK just to be sure.
00:26:12
@connorbaker:matrix.orgconnor (he/him)Thank you both for working on that00:26:26
@glepage:matrix.orgGaétan Lepage But I confirm that firefox builds fine (no gcc-wrapper triggering disallowedRequisited) with both PRs applied. 00:26:58
@daniel-fahey:matrix.orgDaniel FaheyCUDA refactor victim fix https://github.com/NixOS/nixpkgs/pull/457870 ready to merge13:09:11
@collinarnett:matrix.orgCollin Arnett changed their profile picture.15:23:43
@arilotter:matrix.orgAri Lotter

is this a horrible idea, if i need cuda support and don't want to wait hours for builds? :)

(final: prev: {
  python312Packages = prev.python312Packages.override {
    overrides = pyfinal: pyprev: {
      torch = pyfinal.torch-bin;
    };
  };
})
21:28:33

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