{
  description = "kakoune (patch)";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (sys:
    let
      pkgs = nixpkgs.legacyPackages.${sys};
      kak = pkgs.stdenv.mkDerivation rec {
        pname = "kak";
        version = "dev";
        src = ./. ;
        makeFlags = [ "debug=no" "PREFIX=${placeholder "out"}" ];
        nativeBuildInputs = [ pkgs.clang_11 ];

        preConfigure = ''
          export version="v${version}"
        '';

        enableParallelBuilding = true;

        doInstallCheck = true;
        installCheckPhase = ''
          $out/bin/kak -ui json -e "kill 0"
        '';

        postInstall = ''
          # make share/kak/autoload a directory, so we can use symlinkJoin with plugins
          cd "$out/share/kak"
          autoload_target=$(readlink autoload)
          rm autoload
          mkdir autoload
          ln -s --relative "$autoload_target" autoload
          cat <<EOF >> kakrc
          set-option -add global ui_options terminal_assistant=cat
          EOF
        '';
      };
    in rec {
      packages.kak = kak;
      packages.default = kak;
      devShells.default = pkgs.mkShell {
        packages = [ pkgs.clang_11 ];
      };
    }
  );
}