$ perl -MJSON -E 'say for keys %INC'

Exporter/Heavy.pm
overload.pm
Exporter.pm
JSON.pm
warnings.pm
Types/Serialiser.pm
overloading.pm
Carp.pm
warnings/register.pm
strict.pm
common/sense.pm
XSLoader.pm
JSON/XS.pm
feature.pm
attributes.pm