Setting owner and group requires existance of those

[TheCataliasTNT2k]

I am using sops-nix to store a secret, which is mounted as a file into a container.
The user in the container does not exist on the host but should be able to read the mounted file.
Setting "owner" and "group" to the correct numeric values allows compilation of my flake, but it can not be applied, because sops can not find the user (obviously).
Is there a better way?

[Mic92]

Duplicate of #514