{
  description = "Unicode toy";

  inputs.nixpkgs.url = "github:nixos/nixpkgs/release-24.11";
  inputs.flake-utils.url = "github:numtide/flake-utils";

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachSystem ["x86_64-linux" "aarch64-darwin"] (system:
      let
        pkgs = import nixpkgs { inherit system; };

        inherit (pkgs.haskell.lib) compose;

        # Fix broken unicode-data-names by overriding the version of the unicode-data package.
        haskellPackagesOverrides = self: super: {
          unicode-data = super.unicode-data_0_6_0;
          unicode-data-names = pkgs.haskell.lib.markUnbroken super.unicode-data-names;
        };

        utoy = pkgs.lib.pipe
          # The basic package
          (pkgs.haskellPackages.developPackage {
            root = ./.;
            overrides = haskellPackagesOverrides;
          })
          # And some build configuration.
          # See https://nixos.org/manual/nixpkgs/unstable/#haskell-packaging-helpers.
          [
            # Remove warp which pulls GHC into the runtime deps for some reason.
            (compose.overrideCabal (drv: {
              postInstall = ''
                remove-references-to -t ${pkgs.haskellPackages.warp} $out/bin/utoy
              '';
            }))
            # Return only the bin folder to curb image size
            compose.justStaticExecutables
          ];
      in {
        packages = rec {
          docker =
            pkgs.dockerTools.buildImage {
              name = "git.pbrinkmeier.de/paul/utoy";
              tag = utoy.version;
              config.Cmd = [ "${utoy}/bin/utoy" ];
            };

          default = utoy;
        };

        devShells.default =
          (pkgs.haskellPackages.developPackage {
            root = ./.;
            overrides = haskellPackagesOverrides;
            modifier = drv:
              pkgs.haskell.lib.addBuildTools drv [
                pkgs.cabal-install
                pkgs.haskellPackages.implicit-hie
                pkgs.haskell-language-server
              ];
            cabal2nixOptions = "--benchmark";
          }).env;
        });
}