bug#31216: commit 217b8c2e0 produces 'Can't locate Date/Parse.pm in @INC Error' perl error

[George myglc2 Clemmer]

Commit ...

217b8c2e0 * gnu: perl: Replace with 5.26.2 [fixes
CVE-2018-{6797,6798,6913}].

... caused the attached perl script that worked like this ...

address@hidden ~/.mail-mirror$ guix environment --ad-hoc perl perl-timedate 
make wget
address@hidden ~/.mail-mirror [env]$ perl mb2md-3.20.pl
Usage:
       mb2md -h
       mb2md [-c] -m [-d destdir]
       mb2md [-c] -s sourcefile [-d destdir]
       mb2md [-c] -s sourcedir [-l wu-mailboxlist] [-R|-f somefolder] [-d 
destdir] [-r strip_extension]
address@hidden ~/.mail-mirror [env]$


... to stop working ...

address@hidden ~/.mail-mirror$  guix environment --ad-hoc perl perl-timedate 
make wget
address@hidden ~/.mail-mirror [env]$  perl mb2md-3.20.pl
Can't locate Date/Parse.pm in @INC (you may need to install the Date::Parse 
module) (@INC contains: 
/gnu/store/wpwb4ig3qhv3m7axjlid2c0f1jqzp09p-profile/lib/perl5/site_perl/5.26.2/x86_64-linux-thread-multi
 /gnu/store/wpwb4ig3qhv3m7axjlid2c0f1jqzp09p-profile/lib/perl5/site_perl/5.26.2 
/gnu/store/wpwb4ig3qhv3m7axjlid2c0f1jqzp09p-profile/lib/perl5/site_perl 
/gnu/store/ynk3rg3i791i6k7rz2imbyj9wyfjrnrc-perl-5.26.2/lib/perl5/site_perl/5.26.2/x86_64-linux-thread-multi
 
/gnu/store/ynk3rg3i791i6k7rz2imbyj9wyfjrnrc-perl-5.26.2/lib/perl5/site_perl/5.26.2
 
/gnu/store/ynk3rg3i791i6k7rz2imbyj9wyfjrnrc-perl-5.26.2/lib/perl5/5.26.2/x86_64-linux-thread-multi
 /gnu/store/ynk3rg3i791i6k7rz2imbyj9wyfjrnrc-perl-5.26.2/lib/perl5/5.26.2) at 
mb2md-3.20.pl line 385.
BEGIN failed--compilation aborted at mb2md-3.20.pl line 385.
address@hidden ~/.mail-mirror [env]$

TIA - George

mb2md-3.20.pl
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