CI: zlib signature error

My CI job:

https://gitlab.freedesktop.org/wayland/wayland.freedesktop.org/-/jobs/53744144

Has failed with error:

checking keyring...
downloading required keys...
:: Import PGP key B8AC08600F108CDF, "Jan Alexander Steffens (heftig) <heftig@archlinux.org>"? [Y/n] 
checking package integrity...
:: File /var/cache/pacman/pkg/zlib-1:1.3-2-x86_64.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] error: zlib: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.
Cleaning up project directory and file based variables
00:01
ERROR: Job failed: exit code 1

The Wiki suggest to remove /etc/pacman.d/gnupg and run pacman-key --init && pacman-key --populate, but I'm not sure if that makes sense in a container.