Your current setup guide leaves the user with leftovers.
Maybe use mv instead of cp.
Also you removed the folder creation of the guide but are still using the following command:
git clone https://github.com/6E006B/usbguard-gnome.git .
The . at the end means write in the current working directory. But you removed the folder creation. This is now unclean. Remove the dot.
Your current setup guide leaves the user with leftovers. Maybe use mv instead of cp.
Also you removed the folder creation of the guide but are still using the following command:
git clone https://github.com/6E006B/usbguard-gnome.git .
The . at the end means write in the current working directory. But you removed the folder creation. This is now unclean. Remove the dot.Problem:
The user may run this command with the standard working directory of /home/USERNAME/