return function(config)
  local null_ls = require "null-ls"
  config.sources = {
    null_ls.builtins.code_actions.eslint,
    null_ls.builtins.code_actions.shellcheck,
    null_ls.builtins.code_actions.xo,

    null_ls.builtins.diagnostics.actionlint,
    null_ls.builtins.diagnostics.ansiblelint,
    null_ls.builtins.diagnostics.dotenv_linter,
    null_ls.builtins.diagnostics.editorconfig_checker,
    null_ls.builtins.diagnostics.eslint,
    null_ls.builtins.diagnostics.flake8,
    null_ls.builtins.diagnostics.jsonlint,
    null_ls.builtins.diagnostics.luacheck,
    null_ls.builtins.diagnostics.markdownlint,
    null_ls.builtins.diagnostics.mypy,
    null_ls.builtins.diagnostics.php,
    null_ls.builtins.diagnostics.phpcs,
    null_ls.builtins.diagnostics.phpmd,
    null_ls.builtins.diagnostics.phpstan,
    null_ls.builtins.diagnostics.psalm,
    null_ls.builtins.diagnostics.pycodestyle,
    null_ls.builtins.diagnostics.pydocstyle,
    null_ls.builtins.diagnostics.pylint,
    null_ls.builtins.diagnostics.semgrep,
    null_ls.builtins.diagnostics.shellcheck,
    null_ls.builtins.diagnostics.standardjs,
    null_ls.builtins.diagnostics.stylelint,
    null_ls.builtins.diagnostics.tfsec,
    null_ls.builtins.diagnostics.trail_space,
    null_ls.builtins.diagnostics.tsc,
    null_ls.builtins.diagnostics.vacuum,
    null_ls.builtins.diagnostics.vint,
    null_ls.builtins.diagnostics.vulture,
    null_ls.builtins.diagnostics.xo,
    null_ls.builtins.diagnostics.yamllint,
    null_ls.builtins.diagnostics.zsh,

    null_ls.builtins.formatting.autoflake,
    null_ls.builtins.formatting.autopep8,
    null_ls.builtins.formatting.black,
    null_ls.builtins.formatting.blade_formatter,
    null_ls.builtins.formatting.cbfmt,
    null_ls.builtins.formatting.clang_format,
    null_ls.builtins.formatting.eslint,
    null_ls.builtins.formatting.fixjson,
    null_ls.builtins.formatting.isort,
    null_ls.builtins.formatting.isort,
    null_ls.builtins.formatting.jq,
    null_ls.builtins.formatting.markdownlint,
    null_ls.builtins.formatting.nginx_beautifier,
    null_ls.builtins.formatting.pg_format,
    null_ls.builtins.formatting.phpcsfixer,
    null_ls.builtins.formatting.prettier_eslint,
    null_ls.builtins.formatting.prettier,
    null_ls.builtins.formatting.prettier,
    null_ls.builtins.formatting.puppet_lint,
    null_ls.builtins.formatting.rome,
    null_ls.builtins.formatting.rustfmt,
    null_ls.builtins.formatting.shfmt.with {
      args = { "-i", "1", "-bn", "-ci", "-sr", "-kb", "-fn" }
    },
    null_ls.builtins.formatting.stylelint,
    null_ls.builtins.formatting.stylua,
    null_ls.builtins.formatting.terrafmt,
    null_ls.builtins.formatting.terraform_fmt,
    null_ls.builtins.formatting.tidy,
    null_ls.builtins.formatting.yamlfmt,

    null_ls.builtins.hover.dictionary,
    null_ls.builtins.hover.printenv,
  }
  return config
end