[ERROR] no such file to load — bundler/setup [Wpscan]

Hello Mindbenders,
I am here back to write a Rescue Step while installing and using Wpscan on Backtrack 5 <3.
So The Error i got is pretty sweet.This how the installation steps goes forward on the terminal when you install Wpscan tool from git scratch.Commands Used:-

sudo apt-get install libcurl4-gnutls-dev libxml2 libxml2-dev libxslt1-dev ruby-dev build-essential
git clone https://github.com/wpscanteam/wpscan.git
cd wpscan
sudo gem install bundler && bundle install --without test

Then after doing all these stuffs i started loading this ruby script.
I was amazed by reading these lines of error.
[ERROR] no such file to load — bundler/setup

Now Final Words [The Fix]

Follow screenshot