anchor.diff:      libcap \
       libevent \
       su-exec \
  -    zlib && \
  +    xz-libs \
  +    zlib \
  +    zstd && \
     apk add --virtual build \
       build-base \
       ca-certificates \
  
positive.code:     linux-headers \
      w3m \
      wget \
      zlib-dev && \
    \
    wget --no-verbose https://www.torproject.org/dist/tor-${TOR_VERSION}.tar.gz && \
    wget --no-verbose https://www.torproject.org/dist/tor-${TOR_VERSION}.tar.gz.asc && \
  
negative.code:   rm -rf /tmp/v${CONFD_VERSION}.tar.gz
  
  
  FROM alpine:3.7
  
  ARG TOR_VERSION=0.3.2.9
  ARG BUILD_DATE
  