error:
       … while evaluating the attribute 'drvPath'
         at «https://releases.nixos.org/nixpkgs/nixpkgs-26.11pre1078010.b6c98e9e6633/nixexprs.tar.xz?narHash=sha256-wQZif6Lyrg1IDl8k68Gwa3OK9PermeRsjdKgso4K1VA%3D»/lib/customisation.nix:416:11:
          415|         // {
          416|           drvPath =
             |           ^
          417|             assert condition;

       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating the option `driverConfiguration.containers.machine1.start_script':

       … while evaluating definitions from `/nix/store/b5yz03mfyd67drnilplad1drbxbkap1w-source/nixos/lib/testing/driver-configuration.nix':

       … while evaluating definitions from `/nix/store/b5yz03mfyd67drnilplad1drbxbkap1w-source/nixos/modules/virtualisation/nspawn-container':

       … while evaluating the option `containers.machine1.system.build.toplevel':

       … while evaluating definitions from `/nix/store/b5yz03mfyd67drnilplad1drbxbkap1w-source/nixos/modules/system/activation/top-level.nix':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error:
       Failed assertions:
       - The option definition `clan.core.postgresql.databases' in `/nix/store/s46yqyhiwyb3n259r2qq1jbn2h4l38hp-source/clanServices/monitoring/default.nix, via option clan._services.allServices.self-monitoring.roles.server.perInstance, via option nixosModule' no longer has any effect; please remove it.
       Use services.postgresql.ensureDatabases for database provisioning and clan.core.postgresql.backupDatabases for backup configuration.

       - The option definition `clan.core.postgresql.users' in `/nix/store/s46yqyhiwyb3n259r2qq1jbn2h4l38hp-source/clanServices/monitoring/default.nix, via option clan._services.allServices.self-monitoring.roles.server.perInstance, via option nixosModule' no longer has any effect; please remove it.
       Use services.postgresql.ensureUsers instead. See https://search.nixos.org/options?show=services.postgresql.ensureUsers