anchor.diff:  
         environment.systemPackages = [ cfg.package ];
   
  -      programs.zsh.interactiveShellInit = with builtins; ''
  +      programs.zsh.interactiveShellInit = ''
           # oh-my-zsh configuration generated by NixOS
           export ZSH=${cfg.package}/share/oh-my-zsh
   
  
positive.code: with lib;
  
  let
    cfg = config.programs.zsh.ohMyZsh;
  in
    {
      options = {
  
negative.code:         };
  
          custom = mkOption {
            default = null;
            type = with types; nullOr str;
            description = ''
              Path to a custom oh-my-zsh package to override config of oh-my-zsh.
              (Can't be used along with `customPkgs`).
            '';
          };
  
          customPkgs = mkOption {
            default = [];
            type = types.listOf types.package;
            description = ''
              List of custom packages that should be loaded into `oh-my-zsh`.
            '';
          };
  
  