/usr/share/perl5/ is in libextutils-xsbuilder-perl 0.28-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/ExtUtils/
/usr/share/perl5/ExtUtils/XSBuilder.pod
/usr/share/perl5/ExtUtils/XSBuilder.pm
/usr/share/perl5/ExtUtils/XSBuilder/
/usr/share/perl5/ExtUtils/XSBuilder/ParseSource.pm
/usr/share/perl5/ExtUtils/XSBuilder/CallbackMap.pm
/usr/share/perl5/ExtUtils/XSBuilder/MapUtil.pm
/usr/share/perl5/ExtUtils/XSBuilder/TypeMap.pm
/usr/share/perl5/ExtUtils/XSBuilder/FunctionMap.pm
/usr/share/perl5/ExtUtils/XSBuilder/PODTemplate.pm
/usr/share/perl5/ExtUtils/XSBuilder/StructureMap.pm
/usr/share/perl5/ExtUtils/XSBuilder/WrapXS.pm
/usr/share/perl5/ExtUtils/XSBuilder/C/
/usr/share/perl5/ExtUtils/XSBuilder/C/grammar.pm