Install this package:
emerge -a virtual/perl-JSON-PP
If the package is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask
emerge
autounmask virtual/perl-JSON-PP
Or alternatively:
emerge --autounmask-write -a virtual/perl-JSON-PP
This virtual package provides the following dependencies:
<pkgmetadata> <maintainer type="project"> <email>perl@gentoo.org</email> <name>Gentoo Perl Project</name> </maintainer> <stabilize-allarches></stabilize-allarches> </pkgmetadata>