{
  programs.nixvim = {
    plugins = {
      cmp-emoji = {enable = true;};
      cmp = {
        enable = true;
        settings = {
          autoEnableSources = true;
          experimental = {ghost_text = true;};
          performance = {
            debounce = 60;
            fetchingTimeout = 200;
            maxViewEntries = 30;
          };
          snippet = {expand = "luasnip";};
          formatting = {fields = ["kind" "abbr" "menu"];};
          sources = [
            {name = "nvim_lsp";}
            {name = "emoji";}
            {
              name = "buffer"; # text within current buffer
              option.get_bufnrs.__raw = "vim.api.nvim_list_bufs";
              keywordLength = 3;
            }
            {
              name = "path"; # file system paths
              keywordLength = 3;
            }
            {
              name = "luasnip"; # snippets
              keywordLength = 3;
            }
          ];

          window = {
            completion = {border = "solid";};
            documentation = {border = "solid";};
          };

          mapping = {
            "<Tab>" = "cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'})";
            "<C-j>" = "cmp.mapping.select_next_item()";
            "<C-k>" = "cmp.mapping.select_prev_item()";
            "<C-e>" = "cmp.mapping.abort()";
            "<C-b>" = "cmp.mapping.scroll_docs(-4)";
            "<C-f>" = "cmp.mapping.scroll_docs(4)";
            "<C-Space>" = "cmp.mapping.complete()";
            "<CR>" = "cmp.mapping.confirm({ select = true })";
            "<S-CR>" = "cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true })";
          };
        };
      };
      cmp-nvim-lsp = {enable = true;}; # lsp
      cmp-buffer = {enable = true;};
      cmp-path = {enable = true;}; # file system paths
      cmp_luasnip = {enable = true;}; # snippets
      cmp-cmdline = {enable = false;}; # autocomplete for cmdline
    };
    extraConfigLua = ''
            luasnip = require("luasnip")
            kind_icons = {
              Text = "󰊄",
              Method = "",
              Function = "󰡱",
              Constructor = "",
              Field = "",
              Variable = "󱀍",
              Class = "",
              Interface = "",
              Module = "󰕳",
              Property = "",
              Unit = "",
              Value = "",
              Enum = "",
              Keyword = "",
              Snippet = "",
              Color = "",
              File = "",
              Reference = "",
              Folder = "",
              EnumMember = "",
              Constant = "",
              Struct = "",
              Event = "",
              Operator = "",
              TypeParameter = "",
            } 

             local cmp = require'cmp'

         -- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
         cmp.setup.cmdline({'/', "?" }, {
           sources = {
             { name = 'buffer' }
           }
         })

        -- Set configuration for specific filetype.
         cmp.setup.filetype('gitcommit', {
           sources = cmp.config.sources({
             { name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
           }, {
             { name = 'buffer' },
           })
         })

         -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
         cmp.setup.cmdline(':', {
           sources = cmp.config.sources({
             { name = 'path' }
           }, {
             { name = 'cmdline' }
           }),
      --      formatting = {
      --       format = function(_, vim_item)
      --         vim_item.kind = cmdIcons[vim_item.kind] or "FOO"
      --       return vim_item
      --      end
      -- }
         })  '';
  };
}