Guix daemon is not able to use substitutes

[Arian-D]

Hi!

I installed Guix via your overlay, and the process went very smoothly. The only issue I'm facing at the moment is that Guix is building everything, and I actually want to use the pre-compiled binaries from Guix substitutes (going against the nature of Gentoo :sweat_smile:).

I tried to modify the guix-daemon openrc service by adding the --substitute-urls=... and also appending it to commands like guix pull, but I'm greeted with this warning about ACLs not being initialized.

$ guix pull --substitute-urls="https://ci.guix.gnu.org"
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to a8353e9 (24 new commits)...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git   a8353e9
substitute: guix substitute: warning: ACL for archive imports seems to be uninitialized, substitutes may be unavailable
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
...

I couldn't find anything on the Guix docs about this, so I didn't know what the issue was.

[Arian-D]

Update: either it was because I hadn't emerged sys-apps/acl prior to installing Guix, or I hadn't trusted Guix's public keys the first time (most likely the latter), but unmerging and reinstalling it again seemed to have fixed it.

Thank you, again! I'll close this issue.

[trofi]

Yeah, it sounds like a missing cache key. ebuild tries to dvertise it as https://github.com/trofi/nix-guix-gentoo/blob/f645bad67a674e27c552cc0e4b194aa5b2c494c2/sys-apps/guix/guix-1.4.0-r4.ebuild#L97:

[as root] allow binary substitution to be downloaded (optional)
    # guix archive --authorize < /usr/share/guix/ci.guix.gnu.org.pub

We'll need add it to the README.md as well.

[trofi]

Documented as https://github.com/trofi/nix-guix-gentoo/commit/1d35d7bbd4d49f9c41f8c45bfc694ac56c7aed0f

Thank you for the report!