diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6fb4bb7..6f478f5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@v3
       - name: configure
         run: |
-          cmake -Bbuild -DCMAKE_INSTALL_PREFIX=_install/piper
+          cmake -Bbuild -DCMAKE_INSTALL_PREFIX=_install/piper -DCMAKE_SYSTEM_PROCESSOR=${{ matrix.arch }}
       - name: build
         run: |
           cmake --build build --config Release