{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };

  outputs = { self, flake-utils, nixpkgs, rust-overlay }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ rust-overlay.overlays.default ];
        };
        rust = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
      in
      {
        devShell = pkgs.mkShell {
          buildInputs = [
            rust
            pkgs.rust-analyzer-unwrapped
          ];

          RUST_SRC_PATH = "${rust}/lib/rustlib/src/rust/library";
        };

        formatter = pkgs.nixpkgs-fmt;
      });
}