vim configuration in configuration.nix

    nixpkgs.config.packageOverrides = pkgs: rec {
      my-vim = pkgs.vim_configurable.customize {
        name = "vim"; # the vim binary name
        vimrcConfig.customRC = ''
          "
          set nocompatible        " Use Vim defaults (much better!)
          set bs=2                " Allow backspacing over everything in insert mode
          set ai                  " Always set auto-indenting on
          set history=50          " keep 50 lines of command history
          set ruler               " Show the cursor position all the time
          set viminfo='20,\"500   " Keep a .viminfo file
          map Q gq                " Don't use Ex mode, use Q for formatting
          set numberwidth=3
          set nomodeline
          set laststatus=2
          set hidden
          "" set colorcolumn=80
          set ignorecase
          set smartcase
          set incsearch
          set hlsearch
          set expandtab
          set tabstop=3
          set shiftwidth=3
          autocmd FileType make setlocal noexpandtab
          autocmd FileType python set tabstop=4|set shiftwidth=4|set expandtab
          autocmd FileType haskell set tabstop=4|set shiftwidth=4|set expandtab
          set wildmode=longest,list,full
          autocmd FileType mail :nmap <F8> :w<CR>:!aspell -e -c %<CR>:e<CR>
          filetype plugin on
          filetype indent on
          runtime ftplugin/man.vim
          set printfont=Monospace\ 10
          map ,e :e <C-R>=expand("%:p:h") . "/" <CR>
          map ,sp :sp <C-R>=expand("%:p:h") . "/" <CR>
          map <F11> :let &background = ( &background == "dark" ? "light" : "dark" )<CR>
          set guifont=Monospace\ 14
          set background=dark
          syntax on

          let g:airline_powerline_fonts = 1

          color gruvbox
          let g:gruvbox_contrast_dark='hard'
          let g:gruvbox_contrast_light='hard'

          " color dracula
          " let g:airline_theme='dracula'
        '';
        vimrcConfig.vam.knownPlugins = pkgs.vimPlugins;
        vimrcConfig.vam.pluginDictionaries = [
          { name = "vim-airline"; }
          { name = "vim-airline-themes"; }
          { name = "vim-colors-solarized"; }
          { name = "vim-fugitive"; }
          { name = "vim"; } # dracula theme
          { name = "gruvbox"; }
        ];
      };
      my-emacs = pkgs.emacsWithPackages (epkgs: with epkgs; [
        #magit
      ]);
    };