Try a different way to pass vars fo cibuildwheel

Author: mdboom

.github/workflows/build-wheel.yml

@@ -138,11 +138,11 @@ jobs:
           CIBW_ENVIRONMENT_LINUX: >
             CUDA_PATH=/host/${{ env.CUDA_PATH }}
             CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}
+            CC=/host$(which sccache) cc
+            CXX=/host$(which sccache) c++
           CIBW_ENVIRONMENT_WINDOWS: >
             CUDA_PATH="$(cygpath -w ${{ env.CUDA_PATH }})"
             CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}
-          CC: sccache gcc
-          CXX: sccache g++
       - name: List the cuda.bindings artifacts directory
         run: |
           if [[ "${{ inputs.host-platform }}" == win* ]]; then