diff --git a/.builds/archlinux.yml b/.builds/archlinux.yml
index a8d1d8e..d5d6803 100644
--- a/.builds/archlinux.yml
+++ b/.builds/archlinux.yml
@@ -27,3 +27,9 @@ tasks:
       cd cage
       CC=clang meson build --werror -Dxwayland=true
       CC=clang ninja -C build scan-build
+  - clang-format: |
+      cd cage
+      meson build --werror -Dxwayland=true
+      ninja -C build clang-format
+      rm -rf build
+      git diff --exit-code