如何解决 rust cargo build-std 中的这个错误？

Question

i am writing an os with rust, i already wrote the bootloader in assembly. but in rust, i want to use the unstable build-std feature. i know it needs access to rust-src . i have already installed it using rustup . i ran this command: rustup component add rust-src and it gave me this output: info: component 'rust-src' is up to date but when i try to compile the code using cargo, it gives me this error:

error: "/usr/lib/rustlib/src/rust/Cargo.lock" does not exist, unable to build with the standard library, try:
        rustup component add rust-src

what should i do?

Answer 1

Have you tried doing as the compiler says?

$ rustup component add rust-src