Hi, Edouard Klein <e...@rdklein.fr> skribis:
> - Why is this step not substitutable ? The inputs are known, a hash can > be derived, a substitute server could be queried for an output of that > hash ? What am I missing ? Does the guix derivation not end up in the > store ? What makes it so special that it can't be served by a substitute > server ? It’s not substitutable because it’s not a derivation. It’s not a derivation because it needs to access the store to “compute the Guix derivation”. The latter could be addressed with “nested” or “recursive” derivations as Nix calls them, but it’s quite a beast. Anther option would be to have a built-in derivation builder that would do that process on behalf of users. That would turn the process into a derivation, which is thus cachable, substitutable, etc. > - Is there a way (even a very dirty one, like hand copying stuff accross > /var/guix/profiles/per-user/*/current-guix) I can stop paying this 4 > minutes per user price ? As I said, this is downtime on my server, as > I need to stop all other services to let guix pull finish. I don’t know of any quick hack for that. Thanks, Ludo’.
