# diff /usr/libdata/perl5/amd64-openbsd/File/Spec.pm{.original,} 
19c19
< my $module = $module{$^O} || 'Unix';
---
> my $module = $module{VMS} || 'Unix';

##</code><code>##

> perl -MFile::Spec -E 'say File::Spec->catfile( "", "" )'
Can't locate VMS/Filespec.pm in @INC ...

##</code><code>##

The most recent version "1.13" of the module "VMS::Filespec"
is part of the perl-5.36.3 distribution. To install that, you need to run
  force install VMS::Filespec   --or--
  install PEVANS/perl-5.36.3.tar.gz