diff --git a/action.yml b/action.yml
index 56b4f10..eb7496b 100644
--- a/action.yml
+++ b/action.yml
@@ -28,6 +28,16 @@ runs:
         git add "./post-entrypoint.sh"
         git commit -m "fuck you, gitea"
     
+    - name: sanity check
+      shell: bash
+      run: |
+        if [ -z "${{ secrets.USERNAME }}" ]; then
+          echo "❌ Secret not set!"
+          exit 1
+        else
+          echo "✅ Secret appears to be set."
+        fi
+    
     - name: Build package
       uses: https://git.sanin.dev/packages_test/build-publish/@build
       with: