$ sudo apt-get update
$ sudo apt-get install elpa-noflet 

elpa-noflet is installed in your system.

Make ensure the elpa-noflet package were installed using the commands given below,

$ sudo dpkg-query -l | grep elpa-noflet *

You will get with elpa-noflet package name, version, architecture and description in a table

elpa-noflet package basic information: