I tried setting up Zitadel and couldn't because for whatever reason it's Nix build isn't reproduceable. So Nix always breaks when trying to verify that it, you know, actually built correctly. So I eventually gave up.
Originally (maybe over a year ago) I had similar issues. But now Zitadel is one `enable = true;` option[1] away and in the official nixpkgs repo so you shouldn't really have this issue anymore. I was able to use it pretty easily with the built in service and postgres service[2] (note mine is encapsulated in a nixos container but otherwise the inner config is all you really need).
