diff --git a/libc/cmake/modules/LLVMLibCObjectRules.cmake b/libc/cmake/modules/LLVMLibCObjectRules.cmake
--- a/libc/cmake/modules/LLVMLibCObjectRules.cmake
+++ b/libc/cmake/modules/LLVMLibCObjectRules.cmake
@@ -195,7 +195,9 @@
     if(LIBC_GPU_TARGET_ARCHITECTURE_IS_AMDGPU)
       target_compile_options(${internal_target_name} PRIVATE -mcpu=${LIBC_GPU_TARGET_ARCHITECTURE} -flto)
     elseif(LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
-      target_compile_options(${internal_target_name} PRIVATE -march=${LIBC_GPU_TARGET_ARCHITECTURE})
+      target_compile_options(${internal_target_name} PRIVATE
+                             -march=${LIBC_GPU_TARGET_ARCHITECTURE}
+                             --cuda-path=${LIBC_CUDA_ROOT})
     endif()
     target_include_directories(${internal_target_name} PRIVATE ${include_dirs})
     if(full_deps_list)
diff --git a/libc/cmake/modules/LLVMLibCTestRules.cmake b/libc/cmake/modules/LLVMLibCTestRules.cmake
--- a/libc/cmake/modules/LLVMLibCTestRules.cmake
+++ b/libc/cmake/modules/LLVMLibCTestRules.cmake
@@ -507,6 +507,7 @@
                            --target=${LIBC_GPU_TARGET_TRIPLE})
   elseif(LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
     target_compile_options(${fq_build_target_name} PRIVATE
+                           --cuda-path=${LIBC_CUDA_ROOT}
                            -march=${LIBC_GPU_TARGET_ARCHITECTURE}
                            --target=${LIBC_GPU_TARGET_TRIPLE})
   endif()
diff --git a/libc/cmake/modules/prepare_libc_gpu_build.cmake b/libc/cmake/modules/prepare_libc_gpu_build.cmake
--- a/libc/cmake/modules/prepare_libc_gpu_build.cmake
+++ b/libc/cmake/modules/prepare_libc_gpu_build.cmake
@@ -98,3 +98,11 @@
 else()
   message(FATAL_ERROR "Unknown GPU architecture '${gpu_test_architecture}'")
 endif()
+
+if(LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
+  find_package(CUDAToolkit QUIET)
+  if(CUDAToolkit_FOUND)
+    get_filename_component(LIBC_CUDA_ROOT "${CUDAToolkit_BIN_DIR}" DIRECTORY ABSOLUTE)
+    message(WARNING ${LIBC_CUDA_ROOT})
+  endif()
+endif()
diff --git a/libc/startup/gpu/nvptx/CMakeLists.txt b/libc/startup/gpu/nvptx/CMakeLists.txt
--- a/libc/startup/gpu/nvptx/CMakeLists.txt
+++ b/libc/startup/gpu/nvptx/CMakeLists.txt
@@ -10,6 +10,7 @@
     -nogpulib # Do not include any GPU vendor libraries.
     -march=${LIBC_GPU_TARGET_ARCHITECTURE}
     --target=${LIBC_GPU_TARGET_TRIPLE}
+    --cuda-path=${LIBC_CUDA_ROOT}
   NO_GPU_BUNDLE # Compile this file directly without special GPU handling.
 )
 get_fq_target_name(crt1 fq_name)
@@ -19,4 +20,5 @@
   PUBLIC
   "-march=${LIBC_GPU_TARGET_ARCHITECTURE}"
   "--target=${LIBC_GPU_TARGET_TRIPLE}"
+  "--cuda-path=${LIBC_CUDA_ROOT}"
 )
diff --git a/libc/test/IntegrationTest/CMakeLists.txt b/libc/test/IntegrationTest/CMakeLists.txt
--- a/libc/test/IntegrationTest/CMakeLists.txt
+++ b/libc/test/IntegrationTest/CMakeLists.txt
@@ -8,6 +8,7 @@
   set(TEST_COMPILE_FLAGS
     -march=${LIBC_GPU_TARGET_ARCHITECTURE}
     --target=${LIBC_GPU_TARGET_TRIPLE}
+    --cuda-path=${LIBC_CUDA_ROOT}
   )
 endif()