Hi Reza,

"Reza Alizadeh Majd" <r.majd@pantherx.org> writes:

> Hi Guix, 
>
> I want to add a custom channel for all users, one way would be using
> the skeleton files to add `channel.scm` to each user's home
> directory. Just wanted to know if there is any other solution to do
> this or not?

You could try to modify a %default-channels variable in
guix/channels.scm file.  See how to build Guix from Git in
https://www.gnu.org/software/guix/manual/html_node/Building-from-Git.html

Oleg.