{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs?ref=refs/tags/22.11";
  };

  outputs = { self, nixpkgs }:
  let
    system = "x86_64-linux";
    pkgs = (import nixpkgs {
      inherit system;
      config = {
        packageOverrides = pkgs: rec {
          ruby = pkgs.ruby_3_1;
          bundler = pkgs.bundler.override {
            inherit ruby;
          };
          bundix = pkgs.bundix.override {
            inherit bundler;
          };
        };
      };
    });
  in {
    devShells.${system} = {
      default = pkgs.mkShell {
        buildInputs = with pkgs; [
          ruby_3_1 postgresql git redis curl nginx openssl coreutils ffmpeg gcc exiftool glib pkg-config
        ];
        shellHook = ''
          PS1="(deps) $PS1"
        '';
      };
      bundix = pkgs.mkShell {
        buildInputs = [ pkgs.bundix ];
        shellHook = ''
          PS1="(bundix) $PS1"
        '';
      };
    };
    packages.${system}.default =
    let
      gems = pkgs.bundlerEnv {
        name = "danbooru";
        rubt = pkgs.ruby;
        gemdir = ./.;
      };
    in pkgs.stdenv.mkDerivation {
      name = "danbooru";
      src = ./.;
      buildInputs = [ gems pkgs.ruby ];
      installPhase = ''
        mkdir -p $out
        cp -r $src $out
      '';
    };
  };
}