diff --git a/docker/seed-handshake-demo.sh b/docker/seed-handshake-demo.sh
index de9ab35a..48b6529f 100755
--- a/docker/seed-handshake-demo.sh
+++ b/docker/seed-handshake-demo.sh
@@ -47,8 +47,8 @@ read -r -d '' HANDSHAKE_CODE <<'CS' || true
 // for Complete=true. Run this twice: the second run is the one the plain overload got wrong.
 var values = new Dictionary<string, object?> { ["Payload"] = 42.5 };
 var hs = await Attributes.WriteBatchAndWaitAsync(
-    values, "Trigger", true, "Complete", true, TimeSpan.FromSeconds(20),
-    "Complete", false, TimeSpan.FromSeconds(10));
+    values, "Trigger", true, "Complete", true, System.TimeSpan.FromSeconds(20),
+    "Complete", false, System.TimeSpan.FromSeconds(10));
 Log.Info($"handshake matched={hs.Matched} phase={hs.Phase} timedOut={hs.TimedOut} resetFailed={hs.ResetFailed}");
 return new { Matched = hs.Matched, Phase = hs.Phase.ToString(), TimedOut = hs.TimedOut, ResetFailed = hs.ResetFailed, Error = hs.ErrorMessage ?? "" };
 CS
@@ -63,7 +63,7 @@ read -r -d '' DEVICE_CODE <<'CS' || true
 // write re-triggers this script, which returns at the guard.
 var t = await Attributes.GetAsync("Trigger");
 var ts = t?.ToString();
-if (!((t is bool b && b) || ts == "1" || string.Equals(ts, "true", StringComparison.OrdinalIgnoreCase))) return null;
+if (!((t is bool b && b) || ts == "1" || string.Equals(ts, "true", System.StringComparison.OrdinalIgnoreCase))) return null;
 await Attributes.SetAsync("Complete", true);
 await Attributes.SetAsync("Trigger", false);
 return null;