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

       … while evaluating derivation 'agent-vm'
         whose name attribute is located at «github:NixOS/nixpkgs/4975466d324710c576dc11ad614684e6bd8cad8e?narHash=sha256-xJ%2BX4hBtOcAFGBOe5nAMyMUeF9foJBmIOu3NjBqBycU%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'text' of derivation 'agent-vm'
         at «github:NixOS/nixpkgs/4975466d324710c576dc11ad614684e6bd8cad8e?narHash=sha256-xJ%2BX4hBtOcAFGBOe5nAMyMUeF9foJBmIOu3NjBqBycU%3D»/pkgs/build-support/trivial-builders/default.nix:135:11:
          134|           name
          135|           text
             |           ^
          136|           executable

       … while evaluating the option `virtualisation.vmVariant.system.build.toplevel':

       … while evaluating definitions from `/nix/store/398fqjqkp383m7pyla9nxpi1is5vzywh-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 `services.journald.extraConfig' in `/nix/store/qdc2fm1i6dzpfffjgrdvfw2vdk03avbv-source/modules/nixos/test-support' no longer has any effect; please remove it.
       Use services.journald.settings.Journal instead.