diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d23019e..b2f47ad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,7 @@ jobs:
           matrix: |
             os: [ubuntu-latest, windows-latest, macos-latest]
             python-version: [3.8, 3.10, 3.12]
+      - run: cat $GITHUB_OUTPUT
       - run: echo ${{ steps.set-matrix.outputs.matrix }}
       - id: set-matrix
         run: echo "matrix=$MATRIX" >> $GITHUB_OUTPUT
diff --git a/main.py b/main.py
index c000873..bcf8d23 100755
--- a/main.py
+++ b/main.py
@@ -117,8 +117,8 @@ def main() -> None:
 
     output_matrix = json.dumps(matrix)
 
-    output("matrix", output_matrix)
     setenv("MATRIX", output_matrix)
+    output("matrix", output_matrix)
 
 
 if __name__ == "__main__":