diff --git a/.github/workflows/build_esptool.yml b/.github/workflows/build_esptool.yml
index 43812ef8a..9730e813f 100644
--- a/.github/workflows/build_esptool.yml
+++ b/.github/workflows/build_esptool.yml
@@ -26,6 +26,7 @@ jobs:
       - uses: uraimo/run-on-arch-action@v2
         name: Build and test in ${{ matrix.platform }}
         with:
+          arch: ${{ matrix.platform }}
           distro: ubuntu20.04
           shell: /bin/bash
           # Not required, but speeds up builds by storing container images in