diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
index ffd1dd9..169ce20 100644
--- a/.github/workflows/build-linux.yml
+++ b/.github/workflows/build-linux.yml
@@ -38,4 +38,5 @@ jobs:
     - name: Build
       working-directory: ${{env.GITHUB_WORKSPACE}}
       shell: bash
-      run: ./build.py --mode release --target linux --test tests/hello.c
+      run: ./build.py -m release -t tests/hello.c
+      run: ./a
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index b7248ea..b3ce713 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -38,4 +38,5 @@ jobs:
     - name: Build
       working-directory: ${{env.GITHUB_WORKSPACE}}
       shell: bash
-      run: ./build.py --mode release --target windows --test tests/hello.c
+      run: ./build.py -m release -t tests/hello.c
+      run: ./a
diff --git a/build.py b/build.py
index 36278d5..7c30718 100755
--- a/build.py
+++ b/build.py
@@ -110,6 +110,9 @@ if not os.path.exists('lib'):
 if not os.path.exists('bin'):
     os.mkdir('bin')
 
+if platform.system().lower() == 'windows':
+    sys.exit(1);
+
 target_abi = 'sysv'
 target_arch = 'x86-64'
 target_os = 'linux'