Now yes, but I think it is old, cause startx rests there in slim config: https://www.gnu.org/software/guix/manual/en/guix.html#index-slim_002dconfiguration .

Sorry, I have not found solution by keyword 'touchpad' in that guix manual, but I have no time to read entire text to get an idea how to try to solve this.

Mar 27, 2019, 4:31 PM by rekado@elephly.net:

znavko@tutanota.com writes:
Hello! I have updated guix and tried to run `guix system reconfigure
..` (just for update, config is the same), but something has been
changed in guix repository (I think so).

The error is this:

# guix system reconfigure /etc/config.scm
/etc/config.scm:65:46: error: extraneous field initializers
(slim-configuration-startx)
[…]

There no longer is a “startx” field in the “slim-configuration”.
I have studied the guile file
https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/services/xorg.scm#n550

You shouldn’t need to look at Guile code. Have you looked at the manual?

--
Ricardo