{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";

    sonic-server = {
      url = "github:pleshevskiy/sonic";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-utils.follows = "flake-utils";
    };
  };

  outputs = inputs @ { self, nixpkgs, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ inputs.sonic-server.overlays.default ];
        };
      in
      {
        devShell = pkgs.mkShell {
          packages = with pkgs; [ cargo rustc rustfmt clippy rust-analyzer sonic-server inetutils ];
          RUST_SRC_PATH = pkgs.rustPlatform.rustLibSrc;
        };
      });
}