Indicate minimum toolchain version preventing
@@ -44,7 +44,7 @@ Guidelines for contributing to Lapce can be found in [`CONTRIBUTING.md`](CONTRIB
It is easy to build Lapce from source on a GNU/Linux distribution. Cargo handles the build process, all you need to do, is ensure the correct dependencies are installed.
-1. If you haven't already, install the Rust compiler and Cargo using [`rustup.rs`](https://rustup.rs/).
+1. Install the Rust compiler and Cargo using [`rustup.rs`](https://rustup.rs/). If you already have the toolchain, ensure you are using version 1.57 or higher.
2. Install dependencies for your operating system:
