anchor.diff:      path = "commentary";
     };
   
  -  tabular = simpleDerivation {
  +  tabular = buildVimPlugin {
       name = "tabular-git-60f25648";
       src = fetchgit {
         url = "https://github.com/godlygeek/tabular.git";
  
positive.code:     }
    '';
  
    # install a simple standard vim plugin
    simpleDerivation = a@{name, src, path, buildPhase ? "", ...} : stdenv.mkDerivation (a // {
      inherit buildPhase;
  
      installPhase = ''
  
negative.code:     path = "tagbar";
    };
  
    xdebug = buildVimPlugin {
      name = "vim-xdebug-a4980fa65f7f159780593ee37c178281691ba2c4";
      src = fetchurl {
        url = "https://github.com/joonty/vim-xdebug/archive/a4980fa65f7f159780593ee37c178281691ba2c4.tar.gz";
  