diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ce29a49..02b75c9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,6 +28,9 @@ jobs:
         with:
           ref: "builds"
           path: "builds"
+      
+      - name: Clean old builds
+        run: rm $GITHUB_WORKSPACE/builds/*.cs3
 
       - name: Setup JDK 11
         uses: actions/setup-java@v1