/usr/lib/x86_64-linux-gnu/ is in libzeromq-perl 0.23-1build4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.22/
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Context.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Raw.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Socket.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Constants.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Message.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ/Poller.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/ZeroMQ/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/ZeroMQ/ZeroMQ.so
/usr/lib/x86_64-linux-gnu/perl5/5.22/ZeroMQ.pm