{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = { self, nixpkgs, flake-utils, fenix }:
    flake-utils.lib.eachDefaultSystem
      (system:
        let
          overlays = [ fenix.overlays.default ];
          pkgs = import nixpkgs {
            inherit system overlays;
          };
        in
        with pkgs;
        {
          devShells.default = mkShell {
            buildInputs = [
              pkgs.fenix.stable.completeToolchain
              cmake
              pkg-config
              openssl
            ];
          };
        }
      );
}