quick env with virtualenv + override .zshrc + zsh theme + vim_configurable PATH fix

gistfile1.txt

let
  pkgs = import <nixpkgs> {};
  stdenv = pkgs.stdenv;
in stdenv.mkDerivation rec {
  name = "quick";
  env = pkgs.buildEnv { name = name; paths = buildInputs; };

  buildInputs = [
    pkgs.python27Packages.virtualenv

    pkgs.git
    pkgs.openssl
    pkgs.openssh
    pkgs.wget
    pkgs.moreutils
    pkgs.vim_configurable
    pkgs.zsh
    pkgs.oh-my-zsh
    pkgs.silver-searcher
  ];
  shellHook = ''
            export PATH=$(echo $PATH|tr ':' '\n'|grep -v '\-vim\-'|tr '\n' ':')
            export ZSH="${pkgs.oh-my-zsh}/share/oh-my-zsh/"
            export ZDOTDIR=$PWD
            echo 'source $ZSH/oh-my-zsh.sh' >| $ZDOTDIR/.zshrc
            export ZSH_THEME=muse
            plugins=(git)
  '';
}