/usr/share/perl5/ExtUtils/XSBuilder.pm is in libextutils-xsbuilder-perl 0.28-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | package ExtUtils::XSBuilder ;
use strict ;
use vars qw{$VERSION} ;
$VERSION = '0.28' ;
1;
|