[j-nsp] Generating inet6 routes

[Ras]

I'm trying to generate an inet6 route in roughly the same way that I
generate an inet route, but the config checker is disagreeing with me:

[edit routing-options generate]
route 0.0.0.0/0 {
    policy generate-default;
    metric 10000;
    discard;
}
route ::/0 {
    metric 10000;
    discard;
}

(no policy because the peering isn't up yet)

However, a commit check shows:
# commit check
[edit routing-options generate]
  'route ::/0'
    RT: invalid destination ::/0 for family inet
error: configuration check-out failed


I had a look around the internet and the documentation, but I can't
find any obvious way to specify that it is an inet6 route.

Help?

Thanks,
Ras