Starting with perl 5.20, they're not installed any more if empty,
and on FreeBSD, they're (always ?) empty.
PR: 190681
Submitted by: mat
Exp-Run by: antoine
Sponsored by: Absolight
serializer using a binary protocol called Sereal. Its sister module
Sereal::Decoder implements a decoder for this format. The two are
released separately to allow for independent and safer upgrading.
WWW: http://search.cpan.org/dist/Sereal-Encoder/