anchor.diff:  # Install CartoDB API
   RUN git clone git://github.com/CartoDB/CartoDB-SQL-API.git && \
       cd CartoDB-SQL-API && \
  +    git checkout $SQLAPI_VERSION && \
       npm install && \
       rm -r /tmp/npm-* /root/.npm
   
   # Install Windshaft
   RUN git clone git://github.com/CartoDB/Windshaft-cartodb.git && \
       cd Windshaft-cartodb && \
  -    git checkout master && \
  +    git checkout $WINDSHAFT_VERSION && \
       npm install -g yarn@0.27.5 && \
       yarn install && \
       rm -r /tmp/npm-* /root/.npm && \
  
positive.code: ENV LANG en_US.UTF-8
  ENV LANGUAGE en_US:en
  ENV LC_ALL en_US.UTF-8
  
  RUN useradd -m -d /home/cartodb -s /bin/bash cartodb && \
    apt-get install -y -q \
  
negative.code: # Observatory extension
  RUN cd / && git clone --recursive https://github.com/CartoDB/observatory-extension.git && \
    cd observatory-extension && \
    git checkout $OBSERVATORY_VERSION && \
    PGUSER=postgres make deploy
  
  # Copy confs
  