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