Fix macos matrix spec.
diff --git a/.github/workflows/build_package.yml b/.github/workflows/build_package.yml
index f501386..34d2edf 100644
--- a/.github/workflows/build_package.yml
+++ b/.github/workflows/build_package.yml
@@ -35,7 +35,10 @@
         experimental: [false]
         include:
           - os: macos-latest
-            build_package: [compiler, runtime]
+            build_package: compiler
+            experimental: true
+          - os: macos-latest
+            build_package: runtime
             experimental: true
 
     env: