diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 302a8f1..d6dc4e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ "ubuntu-latest", "macos-latest", "macos-14" ]
+        os: [ "ubuntu-latest", "macos-latest", "macos-14", "windows-latest" ]
         python-version: [ "3.10", "3.11", "3.12", "3.13" ]
     steps:
       - name: checkout
@@ -44,7 +44,7 @@ jobs:
           cd test/ci_tests
           python utests.py
       - name: check import
-        if: failure()
+        if: failure() && runner.os != 'Windows'
         run: |
           python -m pip show wrf-python
           python -m pip show --files wrf-python
@@ -56,3 +56,9 @@ jobs:
           file ${installed_files}
           python -vvv -dd -c "import wrf"
           ldd $(echo ${installed_files} | grep -F -v -e ".py" -e ".dist-info")
+      - name: check import (Windows)
+        if: failure() && runner.os == 'Windows'
+        run: |
+          python -m pip show wrf-python
+          python -m pip show --files wrf-python
+          python -vvv -dd -c "import wrf"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 265c22c..bea3630 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,7 +74,8 @@ else()
   add_custom_command(
     OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/fortran/omp.f90"
     DEPENDS "${CMAKE_SOURCE_DIR}/fortran/ompgen.F90"
-    COMMAND ${CMAKE_Fortran_COMPILER} -E fortran/ompgen.F90 -o fortran/omp.f90 -cpp
+    COMMAND ${CMAKE_Fortran_COMPILER} -E "${CMAKE_SOURCE_DIR}/fortran/ompgen.F90"
+      -o "${CMAKE_CURRENT_BINARY_DIR}/fortran/omp.f90" -cpp
     )
 endif()