$ sudo apt-get update
$ sudo apt-get install libdeclarative-systeminfo 

libdeclarative-systeminfo is installed in your system.

Make ensure the libdeclarative-systeminfo package were installed using the commands given below,

$ sudo dpkg-query -l | grep libdeclarative-systeminfo *

You will get with libdeclarative-systeminfo package name, version, architecture and description in a table

libdeclarative-systeminfo package basic information: