Changes in version 0.0.5 - savvy_source() now uses use_cache_dir = TRUE by default because use_cache_dir = FALSE no longer works for some reason. Changes in version 0.0.4 - savvy_source() has a new argument dependencies, which you can specify the additional dependencies in the form of: dependencies = list(foo = list(version = "1", features = c("a", "b"))) Changes in version 0.0.3 - Fix the download URL of download_savvy_cli() on Linux and macOS. - New function savvy_source() compiles Rust code and makes it temporarily available on the R session. savvy_source(' use savvy::savvy; #[savvy] fn hello() -> savvy::Result<()> { savvy::r_println!("Hello!!!!!!"); Ok(()) } ') hello() #> Hello!!!!!!