anchor.diff:        curl-dev \
         tzdata \
         openssh \
  -      openssl \
  +      libressl-dev \
  +      libressl \
         duply \
         ca-certificates \
         python-dev \
         libffi-dev \
  -      openssl-dev \
         librsync-dev \
         gcc \
         alpine-sdk \
  
positive.code:       wget \
        python-dev \
        libffi-dev \
        openssl-dev \
        openssl \
        alpine-sdk \
        linux-headers \
        gcc \
  
negative.code:       librsync \
        librsync-dev \
        python2-dev \
        duplicity \
        py-pip && \
      pip install --upgrade pip && \
      pip install \
        setuptools \
        fasteners \
        PyDrive \
        chardet \
  