Not able to build the server

I am trying build the server ( cargo run --bin server ) using the stable rust build (33) and got the below error.

error[E0432]: unresolved import timely::dataflow::scopes::Root
--> src/lib.rs:14:39
|
14 | use timely::dataflow::scopes::{Child, Root};
| ^^^^ no Root in dataflow::scopes

error[E0433]: failed to resolve: could not find nested in progress
--> src/lib.rs:23:39
|
23 | pub type RootTime = timely::progress::nested::product::Product<timely::progress::timestamp::RootTimestamp, usize>;
| ^^^^^^ could not find nested in progress

error[E0412]: cannot find type RootTimestamp in module timely::progress::timestamp
--> src/lib.rs:23:93
|
23 | pub type RootTime = timely::progress::nested::product::Product<timely::progress::timestamp::RootTimestamp, usize>;
| ^^^^^^^^^^^^^ help: a trait with a similar name exists: Timestamp

error: aborting due to 3 previous errors

Start by running cargo run --bin server on the stable Rust build and inspect the imports and type aliases reported in src/lib.rs. Compare the referenced timely APIs with the project’s dependency setup; done means the server builds successfully without the three unresolved timely errors.