[xmonad] how to install xmonad for group of users.

[wagnerdm at seas.upenn.edu]

Quoting Imam Toufique <wnyrodeo at yahoo.com>:

> thanks for replying everyone.  is there a way to change the location  
> of registry in a global installation?

Yes, use the --package-db option. Your users will need to tell GHC  
about this database as well when building their configs, and xmonad's  
builtin recompile/restart machinery will probably be broken.

~d