It seems Rust 64 has created an error when building socket2. This is causing this package to not build.

To know more, see:
NixOS/nixpkgs#194845

Maybe a cargo update is enough to update the dependencies cache but maybe trust-dns-resolver, the dependency bringing socket2 needs an update.

Update: I have confirmed that running cargo update fixes the build. Submitting a new version with the updated Cargo.lock should be enough.