$ sudo apt-get update
$ sudo apt-get install erlang-xmerl 

erlang-xmerl is installed in your system.

Make ensure the erlang-xmerl package were installed using the commands given below,

$ sudo dpkg-query -l | grep erlang-xmerl *

You will get with erlang-xmerl package name, version, architecture and description in a table

erlang-xmerl package basic information: