Ludovic Courtès <ludovic.courtes@inria.fr> writes:

> Hi,
>
> zimoun <zimon.toutoune@gmail.com> skribis:
>
>> How could I list all the tarballs that ci.guix.gnu.org has?
>
> I suppose you could simply run something like:
>
>   guix build -n --sources=all $(guix package -A | cut -f1)
>
> and see what happens.
>
> That said, I think Chris Baines recently added something to the Guix
> Data Service that periodically tries to build fixed-output derivations
> (essentially source code downloads).  Am I right, Chris?

Kind of, there's this page [1] which tells you about fixed output
derivations for packages, as well as the latest build.

1: https://data.guix-patches.cbaines.net/repository/2/branch/master/latest-processed-revision/fixed-output-package-derivations?system=x86_64-linux&target=none&latest_build_status=&after_name=&limit_results=&all_results=on

It sounds like you want a page listing the derivation outputs, along
with substitute availability. That doesn't exist yet, but shouldn't be
too hard to add.