anchor.diff:          pcre-dev \
           tar \
           git \
  -    && curl -sSL ${LINUX_HEADERS_DOWNLOAD_URL} > /linux-headers-4.4.6-r2.apk \
  -    && apk add --virtual .build-deps-kernel /linux-headers-4.4.6-r2.apk \
       && git clone ${SS_DOWNLOAD_URL} \
       && (cd shadowsocks-libev \
       && git checkout tags/${SS_LIBEV_VERSION} -b ${SS_LIBEV_VERSION} \
  
positive.code:     && echo ${TZ} > /etc/timezone \
      && adduser -h /tmp -s /sbin/nologin -S -D -H shadowsocks \
      && adduser -h /tmp -s /sbin/nologin -S -D -H kcptun \
      && apk del .build-deps .build-deps-kernel \
      && apk add --no-cache \
        $(scanelf --needed --nobanner /usr/bin/ss-* /usr/local/bin/obfs-* \
        | awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
  
negative.code:         automake \
          build-base \
          curl \
          linux-headers \
          c-ares-dev \
          libev-dev \
          libtool \
  