LazyVim.LazyVim/lua/lazyvim/plugins/extras/lang/nix.lua

return {
  recommended = {
    ft = "nix",
    root = "flake.nix",
  },
  {
    "nvim-treesitter/nvim-treesitter",
    opts = function(_, opts)
      opts.ensure_installed = opts.ensure_installed or {}
      vim.list_extend(opts.ensure_installed, { "nix" })
    end,
  },
  {
    "neovim/nvim-lspconfig",
    opts = {
      servers = {
        nil_ls = {},
      },
    },
  },
  {
    "stevearc/conform.nvim",
    optional = true,
    opts = {
      formatters_by_ft = {
        nix = { "nixfmt" },
      },
    },
  },
}