I'm trying this Guix project
https://github.com/wordempire/guix/

because I wanted to try Jelle's recursive npm importer

but when I
./pre-inst-env guix import npm ciccio

I get a backtrace and an error:
ERROR: In procedure scm-error:
ERROR: no code for module (json)

(I can provide the whole backtrace if requested)

This doesn't happen with the Guix I cloned from the official repo

In the chat I was advised that (json) is an external module, to inspect the
GUIX_LOAD_PATH and GUIX_LOAD_COMPILED_PATH variables

So here we go: Jelle's Guix:

[catonano@xps guix] $ ./pre-inst-env env | grep "GUILE_LOAD_PATH"
GUILE_LOAD_PATH=/home/catonano/jelle/guix:/home/catonano/jelle/guix

[catonano@xps guix] $ ./pre-inst-env env | grep "GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_COMPILED_PATH=/home/catonano/jelle/guix:/home/catonano/.guix-profile/lib/guile/2.2/ccache

[catonano@xps guix] $ ./pre-inst-env guile
GNU Guile 2.0.11
Copyright (C) 1995-2014 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> %load-path
$1 = ("/home/catonano/jelle/guix" "/home/catonano/jelle/guix"
"/usr/share/guile/2.0" "/usr/share/guile/site/2.0" "/usr/share/guile/site"
"/usr/share/guile")
scheme@(guile-user)>



AND the Guix coming from the official repo



[catonano@xps guix] $ ./pre-inst-env env | grep "GUILE_LOAD_PATH"
GUILE_LOAD_PATH=/home/catonano/guix:/home/catonano/guix

[catonano@xps guix] $ ./pre-inst-env env | grep "GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_COMPILED_PATH=/home/catonano/guix:/home/catonano/.guix-profile/lib/guile/2.2/ccache

[catonano@xps guix] $ ./pre-inst-env guile
GNU Guile 2.0.11
Copyright (C) 1995-2014 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> %load-path
$1 = ("/home/catonano/guix" "/home/catonano/guix" "/usr/share/guile/2.0"
"/usr/share/guile/site/2.0" "/usr/share/guile/site" "/usr/share/guile")
scheme@(guile-user)>




why the offical Guix is ok with the json module and Jelle's Guix is not ?