diff --git a/.gitea/workflows/build-demo.yaml b/.gitea/workflows/build-demo.yaml
index 3f80108..09374fa 100644
--- a/.gitea/workflows/build-demo.yaml
+++ b/.gitea/workflows/build-demo.yaml
@@ -8,13 +8,11 @@ jobs:
       - name: Checkout master
         uses: https://gitea.com/actions/checkout@v4
 
-      - name: Setup Python
-        uses: https://gitea.com/actions/setup-python@v4
-        with:
-          python-version: '3.9'
+      - name: Install Python
+        run: apt-get install python3.9
 
       - name: Install Material for MkDocs
-        run: pip install mkdocs-material
+        run: python -m pip install mkdocs-material
 
       - name: Setup Node.js
         uses: https://gitea.com/actions/setup-node@v4