gistfile1.txt

  vim' = pkgs.vimHugeX;  # this one has gvim in PATH
  vim = vim'.customize {  # this one has no gvim in PATH :(
    name = "vim";
    vimrcConfig.customRC = ''
    set tabstop=2
    set shiftwidth=2
    set expandtab
    set nocompatible
    '';
  };