Subject: "guix build" doesn't find modules from extra channels when building from an expression

From: <[email-masked]>
Date: Sun, 29 Dec 2019 16:06:31 +0000 (GMT)

I have added my own repository to my ~/.config/guix/channels.scm (https://gitlab.com/pkill-9/guix-packages-free), but when I run `guix build --expression='(use-modules (pkill9 utils))' it returns "no code for module (pkill9 utils)".

It does find modules from the guix repository though, e.g. `guix build --expression='(use-modules (guix packages))` returns "guix build: error: #<unspecified>: not something we can build" without a "no code for module" error.