{ pkgs, nonels-sources-options, ... }:
{
  # Empty configuration
  empty = {
    plugins.none-ls.enable = true;
  };

  # Broken:
  # error: The option `plugins.none-ls.sources.formatting.beautysh' does not exist.
  #
  # beautysh = {
  #   plugins.none-ls = {
  #     enable = true;
  #     sources.formatting.beautysh.enable = true;
  #   };
  # };

  with-lsp-format = {
    plugins = {
      lsp.enable = true;
      lsp-format.enable = true;
      none-ls = {
        enable = true;
        enableLspFormat = true;
      };
    };
  };

  default = {
    plugins.none-ls = {
      # sandbox-exec: pattern serialization length 159032 exceeds maximum (65535)
      enable = !pkgs.stdenv.isDarwin;

      enableLspFormat = false;
      border = null;
      cmd = [ "nvim" ];
      debounce = 250;
      debug = false;
      defaultTimeout = 5000;
      diagnosticConfig = null;
      diagnosticsFormat = "#{m}";
      fallbackSeverity = "error";
      logLevel = "warn";
      notifyFormat = "[null-ls] %s";
      onAttach = null;
      onInit = null;
      onExit = null;
      rootDir = null;
      shouldAttach = null;
      tempDir = null;
      updateInInsert = false;
      sources =
        let
          options = nonels-sources-options.options.plugins.none-ls.sources;

          unpackaged =
            [
              "blade_formatter"
              "bsfmt"
              "bslint"
              "cljstyle"
              "cueimports"
              # As of 2024-03-22, pkgs.d2 is broken
              # TODO: re-enable this test when fixed
              "d2_fmt"
              "erb_lint"
              "findent"
              "forge_fmt"
              "gccdiag"
              "gersemi"
              "markuplint"
              "mlint"
              "nginx_beautifier"
              "npm_groovy_lint"
              "ocdc"
              "packer"
              "perlimports"
              "pint"
              "pretty_php"
              "purs_tidy"
              "pyink"
              "reek"
              "regal"
              "remark"
              "rescript"
              # As of 2024-06-18, pkgs.rubyfmt is broken on all platforms
              # https://github.com/NixOS/nixpkgs/issues/320722
              # TODO: re-enable this test when fixed
              "rubyfmt"
              "saltlint"
              "solhint"
              "spectral"
              "sqlfmt"
              "sql_formatter"
              "styler"
              "stylint"
              "swiftformat"
              "swiftlint"
              "textidote"
              "textlint"
              "twigcs"
              "vacuum"
              "yamlfix"
            ]
            ++ (pkgs.lib.optionals (pkgs.stdenv.isDarwin && pkgs.stdenv.isx86_64) [
              # As of 2024-03-27, pkgs.graalvm-ce (a dependency of pkgs.clj-kondo) is broken on x86_64-darwin
              # TODO: re-enable this test when fixed
              "clj_kondo"
            ])
            ++ (pkgs.lib.optionals pkgs.stdenv.isDarwin [
              # As of 2024-05-22, python311Packages.k5test (one of ansible-lint's dependenvies) is broken on darwin
              # TODO: re-enable this test when fixed
              "ansible_lint"
              "clazy"
              "gdformat"
              "gdlint"
              "haml_lint"
              "verilator"
              "verible_verilog_format"
            ])
            ++ (pkgs.lib.optionals pkgs.stdenv.isAarch64 [
              "semgrep"
              "smlfmt"
              # As of 2024-03-11, swift-format is broken on aarch64
              # TODO: re-enable this test when fixed
              "swift_format"
            ]);

          sources = pkgs.lib.mapAttrs (
            _: sources:
            pkgs.lib.mapAttrs (
              source: _:
              { enable = true; } // pkgs.lib.optionalAttrs (builtins.elem source unpackaged) { package = null; }
            ) sources
          ) options;
        in
        sources;
    };
  };
}