Does not build with latest stable

[Earlz]

This does not build with the latest stable version of Rust:

Compiling rust-libcore v0.0.3
error: couldn't read "/Users/earlz/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-libcore-0.0.3/rust/src/libcore/../stdsimd/coresimd/mod.rs": No such file or directory (os error 2)

Looks related to this issue, though unsure why it fails in this package after upstream was patched rust-lang/rust#48734

[farcaller]

Rust have a native way to cross-build the libcore, I don't think this one is needed? It's been deprecated for a few years now.