Mismatched error during compilation with serde_codegen

[johnboy14]

I get the following error when I use cargo build

.cargo/registry/src/github.com-88ac128001ac3a9a/textnonce-0.3.1/build.rs:17:33: 17:46 error: mismatched types:
 expected `&mut syntex::Registry`,
    found `&mut inner::syntex::Registry`
(expected struct `syntex::Registry`,
    found struct `inner::syntex::Registry`) [E0308]
/home/.cargo/registry/src/github.com-88ac128001ac3a9a/textnonce-0.3.1/build.rs:17         serde_codegen::register(&mut registry);
                                                                                                                            ^~~~~~~~~~~~~
/home/.cargo/registry/src/github.com-88ac128001ac3a9a/textnonce-0.3.1/build.rs:17:33: 17:46 help: run `rustc --explain E0308` to see a detailed explanation
error: aborting due to previous error
Could not compile `textnonce`.

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