File run_guix_publish.sh of Package guix
#!/bin/sh
# if there is newer Guix compiled by `guix pull`, use it
if [ -x /var/guix/profiles/per-user/root/guix-profile/bin/guix-publish ]; then
BINARY=/var/guix/profiles/per-user/root/guix-profile/bin/guix
else
# otherwise use the one installed with our package
BINARY=/usr/bin/guix
fi
exec "$BINARY" publish --user=nobody --port=8181