error:
       … while calling the 'head' builtin
         at «github:NixOS/nixpkgs/9f11f828c213641c2369a9f1fa31fe31557e3156?narHash=sha256-iUuzKQcyXvopYDDzFpMK5eQKP3WIJExYny2kJtbgUcE%3D»/lib/attrsets.nix:1714:13:
         1713|           if length values == 1 || pred here (elemAt values 1) (head values) then
         1714|             head values
             |             ^
         1715|           else

       … while evaluating the attribute 'optionalValue.value'
         at «github:NixOS/nixpkgs/9f11f828c213641c2369a9f1fa31fe31557e3156?narHash=sha256-iUuzKQcyXvopYDDzFpMK5eQKP3WIJExYny2kJtbgUcE%3D»/lib/modules.nix:1310:5:
         1309|
         1310|     optionalValue = if isDefined then { value = mergedValue; } else { };
             |     ^
         1311|   };

       … while evaluating definitions from `/nix/store/a6q7ydqx9v60jhnvsg2p3j200dpdr9hq-source/lib/make-disk-image.nix':

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

       error: vmTools: the `kernel` argument (kernel-modules) has no
       `target` attribute, so the kernel image filename cannot be determined.

       If you are passing a module tree (e.g. from `pkgs.aggregateModules`) to
       make extra modules available, pass it via `kernelModules` instead and
       keep `kernel` pointing at a real kernel derivation. Alternatively, pass
       `kernelImage` explicitly with the path of the bootable image relative
       to the `kernel` derivation output (e.g. "bzImage" or "Image").