It looks like a few folks have run into this issue, check out the comments from the past few days on the package: AUR (en) - waybar-hyprland-git
You could try your luck with some of the suggestions in the comments. This one looks promising:
julian.poidevin commented on 2023-08-22 16:15 (UTC) (edited on 2023-08-22 16:15 (UTC) by julian.poidevin)
There is a workaround for the build issue provided by
mrp4sten
GitHub user in this comment:paru -Rns waybar-hyprland-git paru -S spdlog-git paru -S waybar-hyprland-git
It worked for me.
A complicating factor is this relationship:
It may be needed to remove both in the first step (sudo pacman -Rns waybar-hyprland-git garuda-hyprland-settings
), then reinstall them both again in the last step (sudo pacman -S waybar-hyprland-git garuda-hyprland-settings
).