在为ARM交叉编译Rust项目时，无法找到`std`的箱子

Question

我非常谨慎地关注steps in the instructions，但当我尝试使用its script交叉编译我的货物项目时， 编译项目的依赖项时出错：

Compiling libc v0.2.4                                                                                                                   
/root/.cargo/registry/src/github.com-88ac128001ac3a9a/libc-0.2.4/src/lib.rs:1:1: 1:1 error: can't find crate for `std` [E0463]             
/root/.cargo/registry/src/github.com-88ac128001ac3a9a/libc-0.2.4/src/lib.rs:1 // Copyright 2012-2015 The Rust Project Developers. See the C
OPYRIGHT                                                                                                                                   
                                                                              ^                                                            
error: aborting due to previous error                                                                                                      
Could not compile `libc`.