diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f52a42a2f..a498dc6ce 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -130,10 +130,15 @@ jobs:
          # ninja version to download. Default: 1.10.0
          version: 1.10.0
          dest: ${{ github.workspace }}/ninja_bin
+
+     - name: Add prebuilt llvm install dir to PATH
+       run: |
+         "${{ github.workspace }}/llvm-install-${{ env.LLVM_VER }}/bin\n" + (Get-Content $env:GITHUB_PATH -Raw) | Set-Content $env:GITHUB_PATH
+
      - name: Configure CMake
        env:
          CMAKE_PREFIX_PATH: ${{ github.workspace }}/llvm-install-${{ env.LLVM_VER }}
-       run: cmake -B build -G Ninja -DFINAL_STAGE=1 -DCMAKE_CXX_COMPILER=clang.exe -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=jakt-install
+       run: cmake -B build -G Ninja -DFINAL_STAGE=1 "-DCMAKE_CXX_COMPILER=${{ github.workspace }}/llvm-install-${{ env.LLVM_VER }}/bin/clang.exe" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=jakt-install
 
      - name: Build Jakt Stage 1 Selfhost
        run: cmake --build build