{ inputs = { nixpkgs.url = "github:NixOS/nixpkgs"; flake-utils.url = "github:numtide/flake-utils"; fenix = { url = "github:nix-community/fenix"; inputs.nixpkgs.follows = "nixpkgs"; }; naersk = { url = "github:nix-community/naersk"; inputs.nixpkgs.follows = "nixpkgs"; }; }; outputs = { self , nixpkgs , flake-utils , fenix , naersk }: flake-utils.lib.eachDefaultSystem (system: let pkgs = nixpkgs.legacyPackages.${system}; # Nix-accessible `Cargo.toml` cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml); # The Rust toolchain to use toolchain = fenix.packages.${system}.toolchainOf { # Use the Rust version defined in `Cargo.toml` channel = cargoToml.package.rust-version; # This will need to be updated when `package.rust-version` is changed in # `Cargo.toml` sha256 = "sha256-KXx+ID0y4mg2B3LHp7IyaiMrdexF6octADnAtFIOjrY="; }; builder = (pkgs.callPackage naersk { inherit (toolchain) rustc cargo; }).buildPackage; in { packages.default = builder { src = ./.; nativeBuildInputs = (with pkgs.rustPlatform; [ bindgenHook ]); }; devShells.default = pkgs.mkShell { # Rust Analyzer needs to be able to find the path to default crate # sources, and it can read this environment variable to do so RUST_SRC_PATH = "${toolchain.rust-src}/lib/rustlib/src/rust/library"; # Development tools nativeBuildInputs = (with pkgs.rustPlatform; [ bindgenHook ]) ++ (with toolchain; [ cargo clippy rust-src rustc rustfmt ]); }; checks = { packagesDefault = self.packages.${system}.default; devShellsDefault = self.devShells.${system}.default; }; }); }