diff '--color=auto' -ur blender-5.1.0.orig/intern/cycles/kernel/device/optix/CMakeLists.txt blender-5.1.0/intern/cycles/kernel/device/optix/CMakeLists.txt
--- blender-5.1.0.orig/intern/cycles/kernel/device/optix/CMakeLists.txt	2026-02-09 06:15:57.000000000 +0100
+++ blender-5.1.0/intern/cycles/kernel/device/optix/CMakeLists.txt	2026-03-17 13:14:41.090636755 +0100
@@ -80,6 +80,7 @@
         ${cuda_nvcc_executable}
         --ptx
         -arch=${arch}
+        ${CUDA_NVCC_FLAGS}
         ${cuda_flags}
         ${input}
       WORKING_DIRECTORY