Error on system startup when home-manager used as NixOS module

[Gerschtli]

Hey, I set up my NixOS system with home-manager as NixOS module. Therefore, the activation script will run inside a systemd service that also runs on system boot. During that phase I get the following error:

Activating homeage
Decrypting secret /nix/store/<path>.age to /run/user/1000/secrets/<path>
mkdir: cannot create directory ‘/run/user/1000’: Permission denied

It looks like the directory was not created yet. I don't know how and when this directory is created (hopefully a system service) than home-manager should specify that as dependency for its systemd service.

1. Do you have an idea, how to find the service that creates this directory?
2. At least mark that in the README or even add the dependency in home-manager NixOS module itself.

[Gerschtli]

Found a solution, maybe would be good to mention this workaround somewhere. Not sure if it would be worth (or possible, the uid could be non-trivial) putting it into home-manager.

let
  username = "<your username>";
  uid = 1000; # your uid
in
{
  systemd.services.home-manager-${username} = {
    after = [ "run-user-${toString uid}.mount" ];
    wants = [ "run-user-${toString uid}.mount" ];
  };
}

[Gerschtli]

Oh damn it, that didn't solve the problem, sorry.

[jordanisaacs]

Ya I am not sure what the fix could be here. I'll leave this open in case anyone figures it out.