return {
   {
      "nvim-treesitter/nvim-treesitter",
      opts = function(_, opts)
         if type(opts) == "table" then
            opts.ensure_installed = opts.ensure_installed or {}
            vim.list_extend(opts.ensure_installed, { "perl" })
         end
      end,
   },

   {
      "jose-elias-alvarez/null-ls.nvim",
      opts = function(_, opts)
         if type(opts) == "table" then
            opts.sources = opts.sources or {}
            local null_ls = require("null-ls")
            vim.list_extend(opts.sources, {
               -- perlls is supposed to use perltidy for formatting, but it doesn't
               -- work not sure why.
               null_ls.builtins.formatting.perltidy,
            })
         end
      end,
   },

   -- Broken because of C++17, see https://github.com/goccy/p5-Compiler-Lexer/issues/89
   -- Should be fixed by generating gperf files again with 3.1, see https://savannah.gnu.org/bugs/?53028
   -- {
   -- 	"neovim/nvim-lspconfig",
   -- 	opts = function(_, opts)
   -- 		if type(opts) == "table" then
   -- 			opts.servers = opts.servers or {}
   -- 			opts.servers.perlls = {}
   -- 		end
   -- 	end,
   -- },
}