diff --git a/.gitea/workflows/build_release.yaml b/.gitea/workflows/build_release.yaml
index 342c59e..0fa5d0c 100644
--- a/.gitea/workflows/build_release.yaml
+++ b/.gitea/workflows/build_release.yaml
@@ -52,8 +52,9 @@ jobs:
         run: python3 -m platformio run --environment "${{ matrix.environment }}"
       - name: Verify firmware and create checksum
         run: |
-          test -n "$(find ".pio/build/${{ matrix.environment }}" -maxdepth 1 -type f -name 'firmware_*.bin' -print -quit)
-          sha256sum ".pio/build/${{ matrix.environment }}"/firmware_*.bin > "firmware-${{ matrix.environment }}.sha256"
+          FIRMWARE_FILE=$(find ".pio/build/${{ matrix.environment }}" -maxdepth 1 -type f -name 'firmware_*.bin' -print -quit)
+          test -n "$FIRMWARE_FILE"
+          sha256sum "$FIRMWARE_FILE" > "firmware-${{ matrix.environment }}.sha256"
       - name: Archive firmware
         uses: christopherhx/gitea-upload-artifact@62ac910c5d3dfa85c7cb2df15afe2e342b2407c2 # v4
         with: