diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 100c6c8..7bd87ac 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -12,12 +12,22 @@ jobs:
     strategy:
       matrix:
         build_type: [Release, Debug]
-        os: [macos-latest, ubuntu-latest]
-        CC: [clang, gcc]
+        os: [macos-latest, ubuntu-latest, windows-latest]
+        CC: [clang, gcc, cl]
         gcc_version: [latest, 11]
         exclude:
+          # macos+clang only
           - os: macos-latest
             CC: gcc
+          - os: macos-latest
+            CC: cl
+          # cl for windows only
+          - os: ubuntu-latest
+            CC: cl
+          - os: windows-latest
+            CC: gcc
+          - os: windows-latest
+            CC: clang
           - CC: clang
             gcc_version: 11
 
@@ -39,12 +49,11 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -C ${{env.BUILD_TYPE}}
+      run: ctest -C ${{matrix.build_type}}
 
     - name: Build (samples)
       env:
         CC: ${{ matrix.CC }}
       run: |
-        rm -rf ${{github.workspace}}/build
-        cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON samples
-        cmake --build ${{github.workspace}}/build --config ${{matrix.build_type}}
+        cmake -B ${{github.workspace}}/build_samples -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON samples
+        cmake --build ${{github.workspace}}/build_samples --config ${{matrix.build_type}}