$ sudo apt-get update
$ sudo apt-get install libdrm-nouveau2 

libdrm-nouveau2 is installed in your system.

Make ensure the libdrm-nouveau2 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libdrm-nouveau2 *

You will get with libdrm-nouveau2 package name, version, architecture and description in a table

libdrm-nouveau2 package basic information: