colmena apply fails when invoked from systemd unit

[pkel]

I'm calling colmena apply from a systemd unit and observe the following error:

[INFO ] Using configuration: <redacted_path>/hive.nix
[INFO ] Enumerating nodes...
[ERROR] -----
[ERROR] Operation failed with error: I/O Error: No such file or directory (os error 2)

The systemd unit looks roughly like this:

 systemd.services.deploy-colmena-hive = {
    description = "deploy colmena hive";
    path = with pkgs; [ colmena ] ;
    script = ''
      <some other stuff>
      colmena apply switch
      <some other stuff>
    ''

The error does not appear after setting

systemd.services.deploy-colmena-hive.path = with pkgs; [ colmena nix ] ;

I'm not proficient with nixos, but shouldn't nix be registered as a dependency elsewhere?

[bjornfor]

(I'm an end user.)

Perhaps. But Nix is a special dependency, I think it's fine to have colmena pick it up from PATH. If colmena were to "bundle" nix, I think it should only be a fallback, and still use the one in PATH (if exists).

However, the error message should definitely be fixed to include what file/directory was missing.