$ sudo apt-get update
$ sudo apt-get install libsereal-encoder-perl 

libsereal-encoder-perl is installed in your system.

Make ensure the libsereal-encoder-perl package were installed using the commands given below,

$ sudo dpkg-query -l | grep libsereal-encoder-perl *

You will get with libsereal-encoder-perl package name, version, architecture and description in a table

libsereal-encoder-perl package basic information: