anchor.diff:  
   ENV \
   	RCRC=/usr/local/lib/rcrc \
  -	TERM=xterm-256color
  +	TERM=xterm-256color \
   	XDG_CONFIG_HOME=$HOME/.config
   
   CMD ["/bin/zsh"]
  
positive.code: 	&& (cd /usr/local/lib/neovim; make; make install) \
  
  	# rcm
  	export rcm_version=1.3.0-1 \
  
  	&& curl https://thoughtbot.github.io/rcm/debs/rcm_${rcm_version}_all.deb \
  		-o /tmp/rcm.deb \
  	&& rcm_sha=2e95bbc23da4a0b995ec4757e0920197f4c92357214a65fedaf24274cda6806d \
  	sha=$(sha256sum /tmp/rcm.deb | cut -f1 -d' ') \
  		[ "$sha" = "$rcm_sha" ] \
  	&& dpkg -i /tmp/rcm.deb && \
  	&& rm /tmp/rcm.deb \
  
  	&& apt-get install -y --no-install-recommends \
  
negative.code: 	# dotfiles
  	git clone --depth 1 \
  		https://github.com/thoughtbot/dotfiles.git \
  		/usr/local/lib/thoughtbot-dotfiles \
  	&& git clone --depth 1 \
  		https://github.com/langri-sha/dotfiles.git \
  		/usr/local/lib/langri-sha-dotfiles \
  
  	# root user
  	&& chsh -s /bin/zsh root \
  	&& USER=root rcup \
  	TMUX_PLUGIN_MANAGER_PATH=$HOME/.tmux/plugins $HOME/.tmux/plugins/tpm/bin/install_plugins
  