Installing RustThemis # RustThemis is available on crates.io. Additionally, Themis Core library has to be installed in your system as well. Themis Core is available as a system package for Linux and macOS. Usually you want to install the stable package to benefit from automatic dependency management and security updates. However, you can also build and install the latest RustThemis from the source code. RustThemis uses pkg-config to locate Themis Core, if available.