[ -n "$NOKERNEL" ] && echo "NOKERNEL=\"true\"" >> $CHROOT_VARIABLES
[ -n "$PACKAGES" ] && echo "PACKAGES=\"$PACKAGES\"" >> $CHROOT_VARIABLES
[ -n "$PRE_SCRIPTS" ] && echo "PRE_SCRIPTS=\"$PRE_SCRIPTS\"" >> $CHROOT_VARIABLES
[ -n "$NOKERNEL" ] && echo "NOKERNEL=\"true\"" >> $CHROOT_VARIABLES
[ -n "$PACKAGES" ] && echo "PACKAGES=\"$PACKAGES\"" >> $CHROOT_VARIABLES
[ -n "$PRE_SCRIPTS" ] && echo "PRE_SCRIPTS=\"$PRE_SCRIPTS\"" >> $CHROOT_VARIABLES