diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index 454e3aa..f0d64b2 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -55,6 +55,16 @@ jobs:
     - name: Build
       run: swift build -v
 
+  # setup-swift doesn't support ARM linux yet.
+  build-ubuntu-arm:
+    runs-on: ubuntu-24.04-arm
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: |
+        docker run swift:6.1 uname -a
+        docker run -v $PWD:/orc -w /orc swift:6.1 swift build -v
+
   integration-test-linux:
     runs-on: ubuntu-latest
     services: