ci: Try to use conda clang-cl

Author: jorisv

.github/workflows/macos-linux-windows-pixi.yml

@@ -76,6 +76,17 @@ jobs:
         environments: ${{ matrix.environment }}
 
     - name: Build EigenPy [MacOS/Linux/Windows]
+      if: contains(matrix.os, 'windows-')
+      env:
+        CMAKE_BUILD_PARALLEL_LEVEL: 2
+        EIGENPY_BUILD_TYPE: ${{ matrix.build_type }}
+        EIGENPY_CXX_FLAGS: ${{ matrix.cxx_options }}
+      shell: cmd /C CALL {0}
+      run: |
+        pixi run -e ${{ matrix.environment }} test
+
+    - name: Build EigenPy [MacOS/Linux/Windows]
+      if: contains(matrix.os, 'ubuntu-') || contains(matrix.os, 'macos-')
       env:
         CMAKE_BUILD_PARALLEL_LEVEL: 2
         EIGENPY_BUILD_TYPE: ${{ matrix.build_type }}