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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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12 Nov 2025
@daniel-fahey:matrix.orgDaniel Fahey Yeah you might want to use extra-substituters (I never grok'd the difference, if I'm being honest) 16:06:51
@daniel-fahey:matrix.orgDaniel Faheynot sure if it's different with Nix on Ubuntu, but on NixOS, I have to rebuild the system before the binary cache is available. Is there a rebuild step with plain Nix?16:08:28
@daniel-fahey:matrix.orgDaniel Fahey

I reckon they might be in a private repo hinted at in https://github.com/flox/nixpkgs/pull/3#issuecomment-1276439899

But the https://github.com/flox/nixpkgs/tree/unstable is a simple fork that I'd like to see sync'd/rebased from upstream Nixpkgs more frequently.

Gaétan Lepage is this is the kind of thing that could be discussed in your CUDA Team meetings, and maybe brought up to the Steering Committee for discussion with Flox?

16:12:16
@glepage:matrix.orgGaétan Lepage Flox is managing their cache internally. As you pointed, they use an internal fork of nixpkgs that is slightly delayed from nixos-unstable (or nixos-unstable-small). It's normal that their cache is less fresh than chache.nixos-cuda.org. 16:13:41
@glepage:matrix.orgGaétan LepageThe difference is that they have the permission from Nvidia to redistribute their binaries.16:14:01

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