Rust Project via Flake Template

• *️⃣ Uses nix flakes.
• ✅ No need to install crate2nix.
• ✅ Auto-generates nix from your Cargo.lock file.
• ⚠️ Uses the import from derivation feature from Nix which may lead to disabling build parallelism.
• ✅ Uses an overlay to use the rust version specified in rust-toolchain.toml.

Call this in your project directory:

Add flake.nix and other files to your project

nix flake init --template github:nix-community/crate2nix

If the directory is empty, it will also create a hello world stub.

If you call this from an existing project, make sure to delete any superfluous files. The template expects top-level Cargo.toml/Cargo.lock files, and a single result binary, otherwise you need to adjust flake.nix manually.

Continue to use cargo/rust-analyzer for a fast developer loop and use nix to verify your program hermetically with nix locally and in CI:

Building project and running tests

nix build

Building & running project

nix run

Building & running project with arguments

nix run -- --arg1 x