diff --git a/agents/linux.nix b/agents/linux.nix
index 8fa9e69..8814425 100644
--- a/agents/linux.nix
+++ b/agents/linux.nix
@@ -44,7 +44,7 @@
         "aarch64"
         "linux"
         "pc"
-        "ubuntu-aarch64:docker://ubuntu:latest"
+        "ubuntu-aarch64:docker://node:20-bullseye"
         ## optionally provide native execution on the host:
         # "native:host"
       ];