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

       … while evaluating derivation 'vm-test-ubuntu_26_04'
         whose name attribute is located at «github:NixOS/nixpkgs/867dcbc30bafe3c862ef88620f2e7a109d7d3be5?narHash=sha256-9dkt1i5JNbEfPb%2BEjLcSDNs8zqEHQ/1JlSaKgj0SBAg%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'buildCommand' of derivation 'vm-test-ubuntu_26_04'
         at «github:numtide/nix-vm-test/f6688c8cc9185daccbeb89b2ff6e57dd66e5474a?narHash=sha256-lv8kCCNM04qFsEMjDVrx6Z4q1afk46CBCQQq1wk5yNM%3D»/generic/default.nix:250:13:
          249|             requiredSystemFeatures = [ "kvm" "nixos-test" ];
          250|             buildCommand = ''
             |             ^
          251|               ${defaultTest {}}

       … while evaluating the option `security.sudo.package':

       … while evaluating definitions from `/nix/store/pkp07s65ihkh79mllwjhia880ihhawd6-source/nix/modules/upstream/nixpkgs/security/sudo.nix':

       … while evaluating the module argument `pkgs' in "/nix/store/pkp07s65ihkh79mllwjhia880ihhawd6-source/nix/modules/upstream/nixpkgs/security/sudo.nix":

       … noting that argument `pkgs` is not externally provided, so querying `_module.args` instead, requiring `config`

       … while evaluating definitions from `/nix/store/pkp07s65ihkh79mllwjhia880ihhawd6-source/nix/lib.nix:66:75: inline module':

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

       error: expected a set but found a string: "x86_64-linux"