Update build_wheels_windows.yml

Author: avdivan

.github/workflows/build_wheels_windows.yml

@@ -107,9 +107,10 @@ jobs:
         python -m pip install cmake==3.24.2
         python -m pip install toml && python -c "import toml; c = toml.load('pyproject.toml'); print('\n'.join(c['build-system']['requires']))" >> requirements.txt | python -m pip install -r requirements.txt
 
-        echo Using OpenBLAS_HOME=%OpenBLAS_HOME%
-        set "CMAKE_ARGS=-DLAPACK=ON -DOpenBLAS_INCLUDE_DIR=%OpenBLAS_HOME:/=/%/include -DOpenBLAS_LIBRARIES=%OpenBLAS_HOME:/=/%/lib/libopenblas.lib"
-        echo CMAKE_ARGS: %CMAKE_ARGS%
+        set "OpenBLAS_HOME_UNIX=%OpenBLAS_HOME:\=/%"
+        set "CMAKE_ARGS=-DLAPACK=ON -DOpenBLAS_INCLUDE_DIR=%OpenBLAS_HOME_UNIX%/include -DOpenBLAS_LIBRARIES=%OpenBLAS_HOME_UNIX%/lib/libopenblas.lib"
+        echo %CMAKE_ARGS%
+
         python setup.py bdist_wheel --py-limited-api=cp37 --dist-dir=%cd%\\wheelhouse -v
       shell: cmd