diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5d5b513..e6ee788 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -43,7 +43,7 @@ jobs:
       - name: Archive simulator build
         working-directory: 'movement/make/build-sim'
         run: |
-          cp watch.html index.html
+          cp firmware.html index.html
           tar -czf movement.tar.gz index.html watch.wasm watch.js
       - name: Upload simulator build
         uses: actions/upload-artifact@v4