Can't compile on rust 1.1

[xmao]

Rusti can't compiled on Rust 1.1. Can anybody help?

src/rusti/exec.rs:21:5: 21:19 error: unresolved import rustc::ast_map. There is no ast_map in rustc
src/rusti/exec.rs:21 use rustc::ast_map;
^~~~~~~~~~~~~~
src/rusti/exec.rs:32:5: 32:43 error: unresolved import syntax::feature_gate::UnstableFeatures. There is no UnstableFeatures in syntax::feature_gate
src/rusti/exec.rs:32 use syntax::feature_gate::UnstableFeatures;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 2 previous errors
Could not compile rusti.

[murarth]

Are you using the latest nightly build of Rust? If not, you should update using rustup with --channel=nightly.