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

@@ -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)
   ]