-#![feature(start, core_intrinsics, alloc_prelude, alloc_error_handler, box_syntax)]
+#![feature(start, core_intrinsics, alloc_error_handler, box_syntax)]
#![no_std]
extern crate alloc;
extern crate alloc_system;
-use alloc::prelude::v1::*;
+use alloc::boxed::Box;
use alloc_system::System;