diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f52a42a2f..f47d328f5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -130,6 +130,11 @@ 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 }}