tweaked workflow; correct cache key

Author: vineetbansal

.github/workflows/build_cuda_windows.yml

@@ -41,7 +41,7 @@ jobs:
       uses: actions/cache@v4
       with:
         path: C:\Program Files (x86)\Intel\oneAPI\
-        key: install-${{ env.WINDOWS_BASEKIT_URL }}-${{ env.WINDOWS_BASEKIT_COMPONENTS }}
+        key: install-${{ env.CUDATOOLKIT_URL }}-${{ env.CUDATOOLKIT_COMPONENTS }}
 
     - name: install cuda
       if: steps.cache-install.outputs.cache-hit != 'true'

backend/cuda/cibuildwheel.toml

@@ -7,7 +7,8 @@ repair-wheel-command = ""
 
 [tool.cibuildwheel.linux]
 before-all = [
-  "yum-config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel7/x86_64/cuda-rhel7.repo",
+  "yum-config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel9/x86_64/cuda-rhel9.repo",
+  "yum search cuda-toolkit*",
   "yum install -y cuda-toolkit-12-6"
 ]
 environment = { CMAKE_CUDA_COMPILER = "/usr/local/cuda-12.6/bin/nvcc" }