$ sudo apt-get update
$ sudo apt-get install fpga-icestorm 

fpga-icestorm is installed in your system.

Make ensure the fpga-icestorm package were installed using the commands given below,

$ sudo dpkg-query -l | grep fpga-icestorm *

You will get with fpga-icestorm package name, version, architecture and description in a table

fpga-icestorm package basic information: