anchor.diff:      g++ \
       gcc \
       jpeg-dev \
  -    llvm9-dev\
  +    llvm10-dev\
       make \
       zlib-dev \
       && apk add --no-cache \
  
positive.code:     py3-gevent \
      zlib \
      jpeg \
      llvm9 \
      libtool \
      supervisor \
      py3-numpy-dev \
  
negative.code: 
  COPY ./requirements.txt /app
  
  ENV LLVM_CONFIG=/usr/bin/llvm-config
  
  RUN apk add --no-cache --virtual .build \
      autoconf \
  