anchor.diff:      py-cffi \
       py-cryptography \
     && pip install --upgrade pip \
  -  && apk add --virtual build-deps \
  +  && apk add --no-cache --virtual build-deps \
       gcc \
       libffi-dev \
       python-dev \
  
positive.code:     musl-dev \
      openssl-dev \
    && pip install gsutil \
    && apk del build-deps \
    && rm -rf /var/cache/apk/*
  
  CMD /bin/run.sh && crond -f -c /root/crontabs
  
negative.code: FROM gliderlabs/alpine:3.4
  
  MAINTAINER Takeru Sato <midium.size@gmail.com>
  
  