From 6944c7c7f7c82fccfe4e216baafb842c821b729d Mon Sep 17 00:00:00 2001
From: Willy Hille <willy.hille@intenta.de>
Date: Fri, 26 Jun 2026 15:34:27 +0200
Subject: [PATCH] blender: respect cudaCapabilities

this should speed up builds by not building binaries for unused cuda compute levels

see https://developer.nvidia.com/cuda/gpus
and https://github.com/blender/blender/blob/1f262d6832021d855a643c5c6afbb0ee60194356/CMakeLists.txt#L650-L653
---
 pkgs/by-name/bl/blender/package.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/by-name/bl/blender/package.nix b/pkgs/by-name/bl/blender/package.nix
index 224139c850af..fa3e8aea19df 100644
--- a/pkgs/by-name/bl/blender/package.nix
+++ b/pkgs/by-name/bl/blender/package.nix
@@ -9,6 +9,7 @@
   ceres-solver,
   cmake,
   config,
+  cudaArches ? cudaPackages.flags.realArches,
   cudaPackages,
   cudaSupport ? config.cudaSupport,
   dbus,
@@ -201,6 +202,7 @@ stdenv'.mkDerivation (finalAttrs: {
     (lib.cmakeFeature "ALEMBIC_LIBRARY" "${lib.getLib alembic}/lib/libAlembic${stdenv.hostPlatform.extensions.sharedLibrary}")
   ]
   ++ lib.optionals cudaSupport [
+    (lib.cmakeFeature "CYCLES_CUDA_BINARIES_ARCH" (lib.concatStringsSep ";" cudaArches))
     (lib.cmakeFeature "OPTIX_ROOT_DIR" "${optix}")
     (lib.cmakeBool "WITH_CYCLES_CUDA_BINARIES" true)
   ]