anchor.diff:          setup.cfg \
           setup.py \
           synapse \
  - && apk del .nacl_deps
  + && apk del .build_deps
    
   VOLUME ["/data"]
   
  
positive.code: 
  COPY . /synapse
  
  RUN apk add --no-cache --virtual .nacl_deps \
          build-base \
          libffi-dev \
          libjpeg-turbo-dev \
  
negative.code:         libxslt-dev \
          linux-headers \
          postgresql-dev \
          zlib-dev \
   && cd /synapse \
   && apk add --no-cache --virtual .runtime_deps \
   	libffi \
          libjpeg-turbo \
  	libressl \
  	libxslt \
  	libpq \
  	zlib \
  	su-exec \
   && pip install --upgrade \
          lxml \
          pip \
  