{
  description = "srid/haskell-template: Nix template for Haskell projects";
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    systems.url = "github:nix-systems/default";
    flake-parts.url = "github:hercules-ci/flake-parts";
    haskell-flake.url = "github:srid/haskell-flake";
    treefmt-nix.url = "github:numtide/treefmt-nix";
    treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
    # tmp-postgres.url = "github:jfischoff/tmp-postgres";
    # tmp-postgres.flake = false;
    mission-control.url = "github:Platonic-Systems/mission-control";
    flake-root.url = "github:srid/flake-root";
  };

  outputs = inputs:
    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
      systems = import inputs.systems;
      imports = [
        inputs.haskell-flake.flakeModule
        inputs.treefmt-nix.flakeModule
        inputs.flake-root.flakeModule
        inputs.mission-control.flakeModule
      ];
      perSystem = { self', system, lib, config, pkgs, ... }: {
        # Our only Haskell project. You can have multiple projects, but this template
        # has only one.
        # See https://github.com/srid/haskell-flake/blob/master/example/flake.nix
        haskellProjects.default = {
          # The base package set (this value is the default)
          # basePackages = pkgs.haskellPackages.ghc_9_12_1;

          # Packages to add on top of `basePackages`
          packages = {
            # Add source or Hackage overrides here
            # (Local packages are added automatically)
            # https://github.com/lehins/hip.git
            # hip.source = inputs.hip + "/hip";
            # tmp-postgres.source = inputs.tmp-postgres;
          };

          # Add your package overrides here
          settings = {


            # tmp-postgres.check = false;

            # beam-migrate = {
            #   broken = false;
            #   jailbreak = true;
            # };

            # beam-postgres = {
            #   broken = false;
            #   jailbreak = true;
            # };
            # barbies-th = {
            #   broken = false;
            #   jailbreak = true;
            # };
          };

          # Development shell configuration
          devShell = {
            # hlsCheck.enable = false;
          };

          # What should haskell-flake add to flake outputs?
          autoWire = [ "packages" "apps" "checks" ]; # Wire all but the devShell
        };

        # Auto formatters. This also adds a flake check to ensure that the
        # source tree was auto formatted.
        treefmt.config = {
          projectRootFile = "flake.nix";

          programs.ormolu.enable = true;
          programs.nixpkgs-fmt.enable = true;
          programs.cabal-fmt.enable = true;
          programs.hlint.enable = true;

          # We use fourmolu
          programs.ormolu.package = pkgs.haskellPackages.fourmolu;
        };

        mission-control.scripts = {
          hoogle = {
            description = "Start Hoogle server for project dependencies";
            exec = ''
              hoogle serve -p 8888 --local;
            '';
            category = "Dev Tools";
          };

          haddocks = {
            description = "make docs & serve them";
            exec = ''
              echo http://127.0.0.1:8887;
              cabal haddock-project --executables --internal --hoogle || true;
              python3 -m http.server -d haddocks 8887;
            '';
            category = "Dev Tools";
          };

        };



        # Default package & app.
        packages.default = self'.packages.rcv-site;
        apps.default = self'.apps.rcv-site;

        # Default shell.
        devShells.default = pkgs.mkShell {
          name = "haskell-template";
          meta.description = "Haskell development environment";
          # See https://zero-to-flakes.com/haskell-flake/devshell#composing-devshells
          inputsFrom = [
            config.haskellProjects.default.outputs.devShell
            config.treefmt.build.devShell
            config.mission-control.devShell
          ];
          nativeBuildInputs = with pkgs; [
          ];
        };
      };
    };
}