diff --git a/.github/workflows/extbuild.yml b/.github/workflows/extbuild.yml
index 55e0f8f9..7f7dde3a 100644
--- a/.github/workflows/extbuild.yml
+++ b/.github/workflows/extbuild.yml
@@ -48,7 +48,7 @@ jobs:
         id: cache-ParallelIO
         uses: actions/cache@v4
         with:
-          path: ~/pio
+          path: {GITHUB_WORKSPACE}/pio
           key: ${{ runner.os }}-${{ env.PIO_VERSION }}.pio
       - name: Build ParallelIO
         if: steps.cache-ParallelIO.outputs.cache-hit != 'true'