diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76d9397a..4cd1296e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ option (PBRT_DBG_LOGGING "Enable (very verbose!) debug logging" OFF)
 option (PBRT_NVTX "Insert NVTX annotations for NVIDIA Profiling and Debugging Tools" OFF)
 option (PBRT_NVML "Use NVML for GPU performance measurement" OFF)
 option (PBRT_USE_PREGENERATED_RGB_TO_SPECTRUM_TABLES "Use pregenerated rgbspectrum_*.cpp files rather than running rgb2spec_opt to generate them at build time" OFF)
-set (PBRT_OPTIX7_PATH $ENV{PBRT_OPTIX7_PATH} CACHE PATH "Path to OptiX 7 SDK")
+set (PBRT_OPTIX_PATH $ENV{PBRT_OPTIX_PATH} CACHE PATH "Path to OptiX SDK")
 set (PBRT_GPU_SHADER_MODEL "" CACHE STRING "")
 
 
@@ -207,8 +207,8 @@ of CUDA installed, please update your PATH.")
       message (SEND_ERROR "Unfortunately, pbrt-v4 triggers an internal compiler error in CUDA 11.3.0. Please either use CUDA 11.0-11.2 or 11.3.1 or later.")
     endif ()
 
-    if ("${PBRT_OPTIX7_PATH}" STREQUAL "")
-        message (WARNING "Found CUDA but PBRT_OPTIX7_PATH is not set. Disabling GPU compilation.")
+    if ("${PBRT_OPTIX_PATH}" STREQUAL "")
+        message (WARNING "Found CUDA but PBRT_OPTIX_PATH is not set. Disabling GPU compilation.")
     else ()
         enable_language (CUDA)
         list (APPEND PBRT_DEFINITIONS "PBRT_BUILD_GPU_RENDERER")
@@ -283,7 +283,7 @@ of CUDA installed, please update your PATH.")
         set (PBRT_CUDA_LIB cuda)
         # optix
         # FIXME
-        include_directories (${PBRT_OPTIX7_PATH}/include)
+        include_directories (${PBRT_OPTIX_PATH}/include)
 
         # find CUDA's bin2c executable
         get_filename_component (cuda_compiler_bin "${CMAKE_CUDA_COMPILER}" DIRECTORY)
@@ -881,8 +881,8 @@ target_include_directories (pbrt_lib PUBLIC
   ${GLAD_INCLUDE}
 )
 
-if (PBRT_CUDA_ENABLED AND PBRT_OPTIX7_PATH)
-    target_include_directories (pbrt_lib SYSTEM PUBLIC ${PBRT_OPTIX7_PATH}/include)
+if (PBRT_CUDA_ENABLED AND PBRT_OPTIX_PATH)
+    target_include_directories (pbrt_lib SYSTEM PUBLIC ${PBRT_OPTIX_PATH}/include)
 endif ()
 
 target_compile_options (pbrt_lib PUBLIC ${PBRT_CXX_FLAGS})