Index: stand/lua/core.lua
===================================================================
--- stand/lua/core.lua
+++ stand/lua/core.lua
@@ -229,6 +229,13 @@
 		end
 	end
 
+	-- Do not attempt to autodetect if underlying filesystem
+	-- do not support directory listing (e.g. tftp, http)
+	if not lfs.attributes("/boot", "mode") then
+		autodetect = "no"
+		loader.setenv("kernels_autodetect", "NO")
+	end
+
 	-- Base whether we autodetect kernels or not on a loader.conf(5)
 	-- setting, kernels_autodetect. If it's set to 'yes', we'll add
 	-- any kernels we detect based on the criteria described.