Use the -k whitelist option to get a kernel whitelist.
This is a bug in current febootstrap-supermin-helper.
printf ("%s: build the supermin appliance on the fly\n"
"\n"
"Usage:\n"
- " %s [-options] inputs [...] whitelist host_cpu kernel initrd\n"
- " %s -f ext2 inputs [...] whitelist host_cpu kernel initrd appliance\n"
+ " %s [-options] inputs [...] host_cpu kernel initrd\n"
+ " %s -f ext2 inputs [...] host_cpu kernel initrd appliance\n"
" %s --help\n"
" %s --version\n"
"\n"