Debian website build error of not finding Local/VCS.pm: any better solutions?

Dear debian-www list,

I was monitoring current website rebuild log [1] and noticed 
many errors like this:

==========================================
make -C 2002 install
make[5]: Entering directory '/srv/www.debian.org/webwml/
english/devel/debian-med/News/2002'
[...]
wml -q -D CUR_YEAR=2018 -o UNDEFuEN:20020528.en.html@g+w   
20020528.wml
ePerl:Error: Perl parsing error (interpreter rc=2)


---- Contents of STDERR channel: ---------
Can't locate Local/VCS.pm in @INC (you may need to install 
the Local::VCS module) (@INC contains: ../../../../Perl 
./../../Perl ../../Perl ../Perl Perl /usr/lib/wml/perl/lib /
usr/lib/wml/perl/lib/x86_64-linux-gnu-thread-multi /etc/perl 
/usr/local/lib/x86_64-linux-gnu/perl/5.24.1 /usr/local/share/
perl/5.24.1 /usr/lib/x86_64-linux-gnu/perl5/5.24 /usr/share/
perl5 /usr/lib/x86_64-linux-gnu/perl/5.24 /usr/share/perl/
5.24 /usr/local/lib/site_perl) at /tmp/wml.n8LYVj/wml.
22229.tmp1.wml line 1975.
BEGIN failed--compilation aborted at /tmp/wml.n8LYVj/wml.
22229.tmp1.wml line 1975.
------------------------------------------
** WML:Break: Error in Pass 3 (rc=1).
Makefile:17: recipe for target '20020528.en.html' failed
make[5]: *** [20020528.en.html] Error 1
make[5]: Leaving directory '/srv/www.debian.org/webwml/
english/devel/debian-med/News/2002'
./../../../Makefile.common:71: recipe for target '2002-
install' failed
make[4]: [2002-install] Error 2 (ignored)

===============================================

It seems that the problem is caused by an incomplete fix 
committed as ed4a6cc2378cdf3d589ca8c95ca534c4504c48e8 in 
english/template/debian/translation-check.wml:

https://salsa.debian.org/webmaster-team/webwml/commit/
ed4a6cc2378cdf3d589ca8c95ca534c4504c48e8#c146cd51b09e4b1b937a505fb5edf01278a497f3_55_62

================================
# Grotty, but it works...
use lib "Perl";
use lib "../Perl";
use lib "../../Perl";
use lib "../../../Perl";
use lib "../../../../Perl";
use Local::VCS ':all';
================================

..and 4 layers are obviously not enough for some deep 
directories.

I'm not really familiar in Perl but there might be some 
better solutions than adding more layers of "use lib".

--
Regards,
Boyuan Yang


[1] https://www-master.debian.org/build-logs/webwml/
wml_run.log

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