very few substitutes available?

[Thomas Danckaert]

Hi guix,

I've been attempting to update my profile for a while now (actually 
the latest generation is already from july... :-) ).  I find that I 
always have to build a huge number of packages, such as the entire 
rust bootstrap & icecat...  I've been stuck in a loop where I run 
“guix pull”, wait a few days, see that I still have to build icecat, 
and try “guix pull” again, ...

How long does it typically take before substitutes are available 
after pulling from master?  Or is there a way to see (from 
ci.guix.info?) which revision I should pull in order to have a 
maximum of substitutes available?

Thanks!

Thomas