Does not work on rustc itself

[jyn514]

$ cargo outdated
error: failed to resolve patches for `https://github.com/rust-lang/crates.io-index`

Caused by:
  failed to load source for dependency `rustc-std-workspace-alloc`

Caused by:
  Unable to update /tmp/cargo-outdatedkH8WkV/library/rustc-std-workspace-alloc

Caused by:
  failed to read `/tmp/cargo-outdatedkH8WkV/library/rustc-std-workspace-alloc/Cargo.toml`

Caused by:
  No such file or directory (os error 2)