{
  inputs = {
    nixpkgs = {
      type = "github";
      owner = "karaolidis";
      repo = "nixpkgs";
      ref = "integration";
    };

    flake-utils = {
      type = "github";
      owner = "numtide";
      repo = "flake-utils";
      ref = "main";
    };

    treefmt-nix = {
      type = "github";
      owner = "numtide";
      repo = "treefmt-nix";
      ref = "main";

      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    { self, nixpkgs, ... }@inputs:
    inputs.flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        treefmt = inputs.treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
      in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            cargo
            rustc
            rustfmt
            clippy
            cargo-udeps
            cargo-outdated
            sqlx-cli
          ];
        };

        formatter = treefmt.config.build.wrapper;
        checks.formatting = treefmt.config.build.check self;
      }
    );
}