Fix the problems that the fixes have caused

add_lib_ppl/startup/.__add_lib_ppl.lua

@@ -6,14 +6,14 @@ local function loader(mn)
 		at=shell.dir().."/lib/"..mn..".lua"
 	end
 	if at then
-		return function() return shell.run(at) end
+		return function() return os.run(_ENV,at) end
 	end
 	return false,"\t\tno file '/lib/"..mn..".lua\n\t\tno file '"..shell.dir().."/lib/"..mn..".lua"
 end
 
 local osrun=_G.os.run
 function _G.os.run(e,p,...)
-	if e.package then
+	if e.package and #e.package.loaders==2 then
 		table.insert(e.package.loaders,loader)
 	end
 	return osrun(e,p,...)