diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index b709c02d..f51d5142 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -15,7 +15,7 @@ jobs:
 
     defaults:
       run:
-        shell: msys2 {0}
+        shell: cmd /C call D:\a\_temp\setup-msys2\msys2.CMD {0}
 
     steps:
     - uses: actions/checkout@v1
@@ -54,14 +54,14 @@ jobs:
     - name: build and install conda package
       env:
         LIBRARY_PATH: ${{ github.workspace }}/../sbcl/src/runtime
-        DYLD_LIBRARY_PATH: ${{ github.workspace }}/../sbcl/src/runtime
+        LD_LIBRARY_PATH: ${{ github.workspace }}/../sbcl/src/runtime
       run: |
         conda build recipe --output-folder conda-bld
         conda install -c ${{ github.workspace }}/conda-bld/ sbcl-librarian
     - name: set environment variables
       run: |
         echo "LIBRARY_PATH=$LIBSBCL_PATH:$CONDA_PREFIX/lib" >> "$GITHUB_ENV"
-        echo "DYLD_LIBRARY_PATH=$LIBSBCL_PATH:$CONDA_PREFIX/lib" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=$LIBSBCL_PATH:$CONDA_PREFIX/lib" >> "$GITHUB_ENV"
         echo "C_INCLUDE_PATH=$CONDA_PREFIX/include" >> "$GITHUB_ENV"
     - name: build and run example
       working-directory: examples/libcalc