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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/#cuda60 Servers

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10 Sep 2025
@ss:someonex.netSomeoneSerge (matrix works sometimes) connor (he/him) (UTC+2): are 7AM (2PM UTC) meetings still OK for you? Would you like to reschedule to a different time? We could have Kevin Mittman join us the next time or other 07:48:33
@ss:someonex.netSomeoneSerge (matrix works sometimes)Oh cool, I wonder if this is the 1st project consuming cuda or torch via meson i nixpkgs07:52:33
@ss:someonex.netSomeoneSerge (matrix works sometimes)AFAIK NVIDIA has never had any objections to ZLUDA, only AMD did07:55:35
@hugo:okeso.euHugo

I managed to launch a test on my package with CUDA enabled, but I get an issue from triton not finding a C compiler. Does that ring a bell to someone ?

RuntimeError: Failed to find C compiler. Please specify via CC environment variable or set triton.knobs.build.impl.

I share my work in progress in a draft PR here: https://github.com/NixOS/nixpkgs/pull/441728

09:59:29
@ss:someonex.netSomeoneSerge (matrix works sometimes)
In reply to @hugo:okeso.eu

I managed to launch a test on my package with CUDA enabled, but I get an issue from triton not finding a C compiler. Does that ring a bell to someone ?

RuntimeError: Failed to find C compiler. Please specify via CC environment variable or set triton.knobs.build.impl.

I share my work in progress in a draft PR here: https://github.com/NixOS/nixpkgs/pull/441728

At the very least we recently stopped early-binding rocm libraries, maybe hard-coded compiler paths went with them. Try giving it a compiler at test time as suggested in the error?
10:05:31
@hugo:okeso.euHugoI (vibe) tried to give it a compiler here in this commit https://github.com/NixOS/nixpkgs/pull/441728/commits/81f7997ca1ca37193f2f26fdbc85c586a92ba6dd but was unsuccessful. Any suggestion how to do that?10:06:58
@matthewcroughan:defenestrate.itmatthewcroughan changed their display name from matthewcroughan @ nixcon to matthewcroughan.15:02:50
@lt1379:matrix.orgLunThat should only impact ROCm unless I messed it up! diff was https://github.com/NixOS/nixpkgs/commit/c74e5ffb6526ac1b4870504921b9ba9362189a1715:52:00

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