anchor.diff:  
   ARG CONFD_VERSION=0.14.0
   
  -ADD https://github.com/kelseyhightower/confd/archive/v${CONFD_VERSION}.tar.gz /tmp/
  -
  +WORKDIR /tmp
   RUN \
     apk add --no-cache \
       bzip2 \
  -    make && \
  +    make \
  +    wget && \
  +  wget --no-verbose https://github.com/kelseyhightower/confd/archive/v${CONFD_VERSION}.tar.gz && \
     mkdir -p /go/src/github.com/kelseyhightower/confd && \
     cd /go/src/github.com/kelseyhightower/confd && \
     tar --strip-components=1 -zxf /tmp/v${CONFD_VERSION}.tar.gz && \
  
positive.code:     wget \
      zlib-dev && \
    \
    gpg --keyserver ipv4.pool.sks-keyservers.net --recv-keys \
      0x6AFEE6D49E92B601 \
      0x28988BF5 \
  
negative.code:   org.label-schema.schema-version="1.0"
  
  COPY --from=confd /go/bin/confd /usr/bin/confd
  
  WORKDIR /tmp
  RUN \
  