Try ninja -v build

Author: mcbarton

.github/actions/Build_and_Test_cppyy/action.yml

@@ -152,9 +152,9 @@ runs:
         cd ..\cppyy-backend\build\
         # Build and Install cppyy-backend
         $env:INCLUDE=$env:CPLUS_INCLUDE_PATH
-        cmake -DCppInterOp_DIR=$env:CPPINTEROP_DIR -DCMAKE_INCLUDE_PATH="$env:CPLUS_INCLUDE_PATH" ..
-        cmake --build . --parallel ${{ env.ncpus }}
-        cp libcppyy-backend.lib $env:CPPINTEROP_DIR\lib\
+        cmake -DCppInterOp_DIR=$env:CPPINTEROP_DIR -G Ninja ..
+        ninja -v build
+        cp libcppyy-backend.dll $env:CPPINTEROP_DIR\lib\
         cd ..
 
     - name: Install CPyCppyy