diff --git a/.github/workflows/build_all.yml b/.github/workflows/build_all.yml
index 41d489d4d8..33b9970888 100644
--- a/.github/workflows/build_all.yml
+++ b/.github/workflows/build_all.yml
@@ -166,6 +166,7 @@ jobs:
         bundle: OrcaSlicer-Linux-flatpak_${{ env.ver }}_${{ matrix.variant.arch }}.flatpak
         manifest-path: scripts/flatpak/io.github.softfever.OrcaSlicer.yml
         cache: true
+        cache-key: flatpak-builder-${{ github.event_name == 'pull_request' && github.event.pull_request.base.sha || github.sha }}
         arch: ${{ matrix.variant.arch }}
         upload-artifact: false
     - name: Upload artifacts Flatpak