Scallywag GH tzdata source build fails

Hi folks,

I noticed an issue with my most recent build of tzdata, where it is downloading 
leap-seconds.list, which changes every 6 months, so needs accessed with its 
unique id, which is the NTP timestamp suffixed name in the link on the FTP site.
So in tzdata.cygport I retrieve the verbatim symlink using wget and readlink the 
NTP timestamp suffixed name, adding that name to SRC_URI.
Everything works fine locally, including srcpkg, but Scallywag now complains it 
can not publish the artifacts because it puts a wget argument into a tar command 
line and fails?
For comparison, `cygport ... vars SRC_URI` displays the correct URIs.
See any failing tzdata job recently for more details than the failure:

scallywag: publishing artifacts
scallywag: staging/tzdata/tzdata-2025c-1-src.hint
scallywag: staging/tzdata/tzdata-2025c-1-src.tar.xz
tar: unrecognized option '--retr-sym=no'
Try 'tar --help' or 'tar --usage' for more information.
Traceback (most recent call last):
   File "/cygdrive/d/a/scallywag/scallywag/./scallywag", line 195, in <module>
     subprocess.check_call('tar -Jcf %s *' % (os.path.join(mydir, 
'builddir.tar.xz')),
   File "/usr/lib/python3.9/subprocess.py", line 373, in check_call
     raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'tar -Jcf 
/cygdrive/d/a/scallywag/scallywag/builddir.tar.xz *' returned non-zero exit 
status 64.
Error: Process completed with exit code 1.

$ grep -C1 SRC_URI tzdata.cygport
GIT_URI=git://github.com/eggert/tz.git
SRC_URI=$HOMEPAGE/repository/releases/$NAME$VERSION.tar.gz
SRC_URI+=" $SRC_URI.asc"
LS_URI=ftp://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
LS_NTP=$(/usr/bin/wget -NqP ${T:-$TMPDIR} --retr-sym=no $LS_URI && readlink 
${T-$TMPDIR}/${LS_URI##*/})
SRC_URI+=" ${LS_URI%/*}/$LS_NTP"
PATCH_URI=

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry