anchor.diff:  RUN chmod +x /etc/profile.d/rbenv.sh
   
   # install rbenv-default-gems
  -RUN cd /usr/local/rbenv/plugins && git clone git://github.com/sstephenson/rbenv-default-gems.git
  +RUN \
  +  cd /usr/local/rbenv/plugins && \
  +  git clone git://github.com/sstephenson/rbenv-default-gems.git
  +
   ADD ./default-gems /usr/local/rbenv/default-gems
   
   # install rbevn-binstub
  -RUN cd /usr/local/rbenv/plugins && git clone git://github.com/ianheggie/rbenv-binstubs.git
  +RUN \
  +  cd /usr/local/rbenv/plugins && \
  +  git clone git://github.com/ianheggie/rbenv-binstubs.git
   
   # Install multiple versions of ruby
  -RUN echo 'gem: --no-rdoc --no-ri' >> /.gemrc
   ENV CONFIGURE_OPTS --disable-install-doc
   ADD ./versions.txt /usr/local/rbenv/versions.txt
  -RUN xargs -L 1 rbenv install < /usr/local/rbenv/versions.txt
  +RUN \
  +  echo 'gem: --no-rdoc --no-ri' >> /.gemrc && \
  +  xargs -L 1 rbenv install < /usr/local/rbenv/versions.txt
   
  
positive.code:   tar \
    tree \
    which \
    zlib-devel
  
  ## add rbenv group
  RUN groupadd rbenv
  
  # Install rbenv 
  RUN cd /usr/local && git clone https://github.com/sstephenson/rbenv.git 
  RUN chgrp -R rbenv /usr/local/rbenv
  RUN chmod -R g+rwxXs /usr/local/rbenv
  
  # Install ruby-build 
  RUN mkdir /usr/local/rbenv/plugins
  RUN cd /usr/local/rbenv/plugins && git clone https://github.com/sstephenson/ruby-build.git 
  RUN chgrp -R rbenv /usr/local/rbenv/plugins/ruby-build
  RUN chmod -R g+rwxXs /usr/local/rbenv/plugins/ruby-build
  RUN cd /usr/local/rbenv/plugins/ruby-build && ./install.sh
  
  ENV RBENV_ROOT /usr/local/rbenv
  ENV PATH /usr/local/rbenv/bin:$PATH
  
negative.code: MAINTAINER pepechoko
  
  RUN 
    yum update -y \
    && yum clean 
  
  RUN \
    rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
  
  RUN yum install -y \
    autoconf \
    automake \
    curl-devel \
  