Koha & Perl

 C4             bin                koha-tmpl          rewrite-config.PL
 INSTALL        catalogue          koha_perl_deps.pl  rotating_collections
 Koha           cataloguing        kohaversion.pl     serials
 Koha.pm        changelanguage.pl  labels             services
 LICENSE        circ               mainpage.pl        skel
 MANIFEST.SKIP  clubs              members            suggestion
 Makefile.PL    course_reserves    misc               svc
 README         cpanfile           offline_circ       t
 README.md      debian             opac               tags
 README.robots  docs               package.json       tmp
 about.pl       errors             patron_lists       tools
 acqui          etc                patroncards        virtualshelves
 admin          fix-perl-path.PL   plugins            xt
 api            gulpfile.js        pos                yarn.lock
 app.psgi       help.pl            reports
 authorities    ill                reserve
 basket         installer          reviews

Not using the standard layout for Perl code

lib, bin, ..