use_guix-shell() {
CHANNEL_FILE=channels.scm
if [ -f $CHANNEL_FILE ]; then
eval "$(guix time-machine -C $CHANNEL_FILE -- shell "$@" --search-paths)"
else
eval "$(guix shell "$@" --search-paths)"
fi
}
use guix-shell -f guix.scm -Df guix.scm