{

inputs = {

nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

flake-utils.url = "github:numtide/flake-utils";

naersk.url = "github:nix-community/naersk";

fenix = {

url = "github:nix-community/fenix";

inputs.nixpkgs.follows = "nixpkgs";

};

};

outputs = { flake-utils, nixpkgs, naersk, fenix, ... }:

flake-utils.lib.eachDefaultSystem (system:

let

overlays = [ fenix.overlays.default ];

pkgs = import nixpkgs {

inherit system overlays;

};

toolchain = with fenix.packages.${system}; combine [

minimal.cargo

minimal.rustc

latest.clippy

latest.rust-src

latest.rustfmt

];

pkg = (naersk.lib.${system}.override {

cargo = toolchain;

rustc = toolchain;

}).buildPackage {

src = ./.;

nativeBuildInputs = with pkgs; [

pkg-config

openssl

gcc

cargo-flamegraph

graphviz

];

};

in

{

defaultPackage = pkg;

devShell = pkg;

});

}