{ pkgs, ... }:
{
  environment.systemPackages = with pkgs; [ tmux ];
  environment.variables = {
    NNN_FIFO = "$XDG_RUNTIME_DIR/nnn.fifo";
    NNN_ICONLOOKUP = 1;
  };

  programs.nixvim = {
    extraPlugins = [
      (pkgs.vimUtils.buildVimPlugin {
        # https://github.com/luukvbaal/nnn.nvim
        name = "nnn.nvim";
        src = pkgs.fetchFromGitHub {
          owner = "luukvbaal";
          repo = "nnn.nvim";
          rev = "662034c73718885ee599ad9fb193ab1ede70fbcb";
          sha256 = "sha256-8+ax8n1fA4jgJugvWtRXkad4YM7TmAAsAopzalmGu/4=";
        };
      })
    ];
    extraConfigLua = ''
      local builtin = require("nnn").builtin
      require("nnn").setup({
        explorer = {
          cmd = "nnn -G -Pp",
        },
        picker = {
          cmd = "tmux new-session nnn -G -Pp",
          style = { border = "rounded" },
          session = "shared",
        },
        auto_open = {
          setup = "explorer",
          tabpage = "explorer",
          ft_ignore = {
            "gitcommit",
          },
        },
        replace_netrw = "picker",
        offset = true,
        mappings = {
          { "<C-t>", builtin.open_in_tab },       -- open file(s) in tab
          { "<C-s>", builtin.open_in_split },     -- open file(s) in split
          { "<C-v>", builtin.open_in_vsplit },    -- open file(s) in vertical split
          { "<C-p>", builtin.open_in_preview },   -- open file in preview split keeping nnn focused
          { "<C-y>", builtin.copy_to_clipboard }, -- copy file(s) to clipboard
          { "<C-w>", builtin.cd_to_path },        -- cd to file directory
          { "<C-e>", builtin.populate_cmdline },  -- populate cmdline (:) with file(s)
        },
      })
    '';
  };
}