V3.60 - Missing flex and bison packages?

Hello,

I have installed V3.60 on my Cerbo GX. I am trying to build packages. For that I need flex and bison but opkg does not find them on the new feeds (https://updates.victronenergy.com/feeds/venus/*/packages/scarthgap/). I tried release, candidate, develop and testing but could not find them. They were available on previous feeds (dunfell).
Could you upload them ?

Thanks,
Lucien