diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0ff5714..4c7f18c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -88,7 +88,7 @@ jobs:
       
       - name: Configure CMake
         working-directory: ${{github.workspace}}/build
-        run: cmake $env:GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$env:BUILD_TYPE -DCMAKE_TOOLCHAIN_FILE=$TOOLCHAIN -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
+        run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCMAKE_TOOLCHAIN_FILE=$TOOLCHAIN -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
         env:
           SPLAT_DIR: ${{ github.workspace }}/.xwin-cache/splat
           TOOLCHAIN: ${{ github.workspace }}/toolchain/clang-cl-msvc.cmake