anchor.diff:      && mv client_linux_amd64 /usr/bin/kcpclient \
       && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
       && echo ${TZ} > /etc/timezone \
  -    && apk del .build-deps \
  +    && 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:" $2 }' \
         | sort -u) \
  -    && rm -rf kcptun-linux-amd64-${KCP_VERSION}.tar.gz \
  +    && rm -rf /linux-headers-4.4.6-r2.apk \
  +        kcptun-linux-amd64-${KCP_VERSION}.tar.gz \
           shadowsocks-libev \
           simple-obfs \
           v2ray_plugin.tar.gz \
  
positive.code:         c-ares-dev \
          libev-dev \
          libtool \
          linux-headers \
          libsodium-dev \
          mbedtls-dev \
          pcre-dev \
          tar \
          git \
      && git clone ${SS_DOWNLOAD_URL} \
      && (cd shadowsocks-libev \
      && git checkout tags/${SS_LIBEV_VERSION} -b ${SS_LIBEV_VERSION} \
  
negative.code: ENV OBFS_DOWNLOAD_URL https://github.com/shadowsocks/simple-obfs.git
  ENV V2RAY_PLUGIN_DOWNLOAD_URL https://github.com/shadowsocks/v2ray-plugin/releases/download/v1.0/v2ray-plugin-linux-amd64-8cea1a3.tar.gz
  ENV KCP_DOWNLOAD_URL https://github.com/xtaci/kcptun/releases/download/v${KCP_VERSION}/kcptun-linux-amd64-${KCP_VERSION}.tar.gz
  ENV LINUX_HEADERS_DOWNLOAD_URL=http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/linux-headers-4.4.6-r2.apk
  
  RUN apk upgrade \
      && apk add bash tzdata rng-tools \
  