diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1e670d6..30a194a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,12 +6,8 @@ on:
   pull_request:
     branches: [ master ]
 jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-      fail-fast: false
+  build-ubuntu:
+    runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v2
@@ -21,3 +17,15 @@ jobs:
 
     - name: build 
       run: make clean;make alt; make clean; make
+
+  build-macos:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: get DateTime
+      run: sudo cpan -i DateTime
+
+    - name: build 
+      run: make clean;make alt; make clean; make