anchor.diff:  #
   # NOTE: If you bump the syslinux version here,
   #       please also update the README.md.
  -RUN apk-install --virtual sl_plus_deps syslinux=6.03-r0 && \
  +RUN apk add --no-cache --virtual sl_plus_deps syslinux=6.03-r2 && \
       cp -r /usr/share/syslinux /tftpboot && \
       find /tftpboot -type f -exec chmod 0444 {} + && \
       apk del sl_plus_deps
  
positive.code: FROM gliderlabs/alpine:latest
  
  # Publish the typical syslinux and pxelinux files at tftp root.
  # We only need one subtree of files from syslinux, and
  
negative.code: VOLUME /tftpboot
  
  # http://forum.alpinelinux.org/apk/main/x86_64/tftp-hpa
  RUN apk add --no-cache tftp-hpa
  
  EXPOSE 69/udp
  
  