anchor.diff:      apt install -y locales && \
       localedef -f UTF-8 -i ja_JP ja_JP.utf8 && \
       apt install -y git tmux vim curl make netcat libreadline-dev nkf
  +
  +# ------------------
  +# Set dotfiles
  +# ------------------
  +RUN mkdir -p $HOME/reps/greymd && \
  +    git clone https://github.com/greymd/dotfiles.git $HOME/reps/greymd/dotfiles && \
  +    cd $HOME/reps/greymd/dotfiles && \
  +    # Delete existing dotfiles
  +    ls -a | grep '^\.'  | grep -vFw '.' | grep -v '^\.git$' | sed 's|^|rm -f $HOME/|' | sh && \
  +    # Set links
  +    ls -a | grep '^\.' | grep -v '^\.git$' | grep -vwF '.' | sed 's/^.*/echo ln -s $(pwd)\/& $HOME\/&/' | sh | sh
   
   # ------------------
   # Install Ruby
  
positive.code: # ------------------
  # Install Go
  # ------------------
  RUN cd $HOME && \
      mkdir $HOME/.go && \
      curl -L https://storage.googleapis.com/golang/go1.7.5.linux-amd64.tar.gz | tar zxv && \
      mv go /usr/local && \
      ls /usr/local/go/bin/ | sed 's;.*;ln -s /usr/local/go/bin/& /usr/local/bin/&;' | sh
  
  # ------------------
  # Install fzy
  
negative.code: RUN curl -L https://cdn.rawgit.com/zsh-users/antigen/v1.4.0/bin/antigen.zsh > $HOME/antigen.zsh
  
  # ------------------
  # Install universal-ctags
  # ------------------
  # Ref: https://github.com/universal-ctags/ctags/blob/master/docs/autotools.rst
  