diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index d02b1e6..cebf34b 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -4,8 +4,10 @@ on: [push]
 
 jobs:
   amd-docker:
-    runs-on: docker
+    runs-on: debian-latest
     steps:
+      - name: Install prerequisites
+        run: apt update && apt install -y zstd
       - name: Cache Nix store
         uses: actions/cache@v3.0.8
         id: nix-cache