anchor.diff:  
     chmod +x /tmp/omf/install && \
     chmod +x /tmp/omf/install_omf.py && \
  -  bash -c '/tmp/omf/install_omf.py' && \
  -  bash -c '/tmp/omf/install'
  +  bash -lc '/tmp/omf/install_omf.py' && \
  +  bash -lc '/tmp/omf/install'
   
   RUN \
     mv ~/.config/fish/config.fish ~/.config/fish/config.fish.bak && \
  
positive.code: set -x LC_ALL en_US.UTF-8 \n\
  set -x LC_CTYPE en_US.UTF-8 \n\
    " ~/.config/fish/config.fish.bak > ~/.config/fish/config.fish && \
    fish -c 'omf theme robbyrussell'
  
negative.code:   locale-gen en_US.UTF-8 && \
    /usr/sbin/update-locale LANG=en_US.UTF-8 && \
  
    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5 && \
    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
  
  # system update
  RUN \
    apt-get update && \
    apt-get -y upgrade && \
    apt-get -y autoremove
  
  RUN \
    apt-get install -y git-core curl axel htop && \
  
    # extra ppa
    apt-get install -y software-properties-common && \
    add-apt-repository ppa:fish-shell/nightly-master
  
  # system update
  RUN \
    apt-get update && \
    apt-get -y upgrade && \
    apt-get -y autoremove
  
  # zsh && fish
  RUN apt-get install -y fish zsh
  
  # oh my zsh
  RUN \
  