message: Tell tar to follow symlinks.
  In Google our distributed build system ends up generating symlinks local
  to the build cluster which are not valid when outputs are untarred
  elsewhere. This tells tar to dereference those symlinks and instead
  capture the file contents.
diff: @@ -22,4 +22,4 @@ for FILE in $*; do
  done
  # tar is having issues with -C for some reason so just cd into OUT_DIR.
  -(cd "$OUT_DIR"; tar -cvf example_configs.tar *.json *.yaml certs/*.pem)
  +(cd "$OUT_DIR"; tar -hcvf example_configs.tar *.json *.yaml certs/*.pem)
  