diff --git a/.builds/openbsd.yml b/.builds/openbsd.yml
deleted file mode 100644
index 1b82536a..00000000
--- a/.builds/openbsd.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-image: openbsd/latest
-packages:
-  - libev
-  - xcb
-  - meson
-  - pkgconf
-  - cmake
-  - uthash
-  - libconfig
-  - dbus
-  - pcre2
-sources:
-  - https://github.com/yshui/picom
-tasks:
-  - setup: |
-      cd picom
-      CPPFLAGS="-I/usr/local/include" LDFLAGS="-L/usr/local/lib" meson setup -Dunittest=true --werror build
-  - build: |
-      cd picom
-      ninja -C build
-  - unittest: |
-      cd picom
-      ninja -C build test
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..00e2f844
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,21 @@
+name: openbsd
+on: push
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 1
+    - uses: cross-platform-actions/action@v0.24.0
+      with:
+        operating_system: openbsd
+        version: '7.5'
+        shell: bash
+        run: |
+          sudo pkg_add libev xcb meson pkgconf cmake uthash libconfig dbus pcre2
+          CPPFLAGS="-I/usr/local/include" LDFLAGS="-L/usr/local/lib" meson setup -Dunittest=true --werror build
+          ninja -C build
+          ninja -C build test
+