$ sudo apt-get update
$ sudo apt-get install geoclue-nominatim 

geoclue-nominatim is installed in your system.

Make ensure the geoclue-nominatim package were installed using the commands given below,

$ sudo dpkg-query -l | grep geoclue-nominatim *

You will get with geoclue-nominatim package name, version, architecture and description in a table

geoclue-nominatim package basic information: