--- a/core/moduleapi.lua	Sun Jan 31 17:27:15 2016 +0100
+++ b/core/moduleapi.lua	Mon Feb 01 21:26:15 2016 +0000
@@ -135,10 +135,7 @@
 end
 
 function api:require(lib)
-	local f, n = pluginloader.load_code(self.name, lib..".lib.lua", self.environment);
-	if not f then
-		f, n = pluginloader.load_code(lib, lib..".lib.lua", self.environment);
-	end
+	local f, n = pluginloader.load_code_ext(self.name, lib, "lib.lua", self.environment);
 	if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message
 	return f();
 end

--- a/util/pluginloader.lua	Sun Jan 31 17:27:15 2016 +0100
+++ b/util/pluginloader.lua	Mon Feb 01 21:26:15 2016 +0000
@@ -55,8 +55,23 @@
 	return f, path;
 end
 
+local function load_code_ext(plugin, resource, extension, env)
+	local content, err = load_resource(plugin, resource.."."..extension);
+	if not content then
+		content, err = load_resource(resource, resource.."."..extension);
+		if not content then
+			return content, err;
+		end
+	end
+	local path = err;
+	local f, err = envload(content, "@"..path, env);
+	if not f then return f, err; end
+	return f, path;
+end
+
 return {
 	load_file = load_file;
 	load_resource = load_resource;
 	load_code = load_code;
+	load_code_ext = load_code_ext;
 };