On Tue, 8 Aug 2017, Ricardo Wurmus wrote:

>
> Paul Dufresne <dufresnep@gmail.com> writes:
>
>> It takes 45 mins. on my relatively old dual core to guix-pull
>
> Yeah, this isn’t great.  Since 0.13.0 compilation is slower and requires
> a whole lot more memory.  That’s a known problem.
>
> There are some ideas to reduce the amount of compilation that has to
> happen locally, but it isn’t quite as simple as a first look may
> suggest.

Could building be avoided entirely with substitutes? Are substitutes not 
appropriate for some reason, or is it just that substitutes are not 
produced on Hydra for every guix commit?

Thanks for clearing this up for a Guix beginner.

Jack