error:
       … while calling the 'head' builtin
         at «git+https://github.com/Mic92/nixpkgs?ref=main&rev=1f50b65020ad640521faadd76cd4adf82f483640&shallow=1»/lib/attrsets.nix:1719:13:
         1718|           if length values == 1 || pred here (elemAt values 1) (head values) then
         1719|             head values
             |             ^
         1720|           else

       … while evaluating the attribute 'value'
         at «git+https://github.com/Mic92/nixpkgs?ref=main&rev=1f50b65020ad640521faadd76cd4adf82f483640&shallow=1»/lib/modules.nix:1149:7:
         1148|     // {
         1149|       value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |       ^
         1150|       inherit (res.defsFinal') highestPrio;

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

       … while evaluating definitions from `/nix/store/x5x12yz6jpvjv18r0hbrjf9s1zc449xb-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/x5x12yz6jpvjv18r0hbrjf9s1zc449xb-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.n8n.serviceConfig':

       … while evaluating definitions from `/nix/store/x5x12yz6jpvjv18r0hbrjf9s1zc449xb-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.n8n.preStart':

       … while evaluating the option `mics-n8n-nodes.extraNodes':

       … while evaluating definitions from `/nix/store/z0k7m7dvzxin9iq8gkynhyrlpxz6nvrb-source/machines/eve/modules/n8n':

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

       error: Refusing to evaluate package 'pnpm-9.15.9' in /nix/store/x5x12yz6jpvjv18r0hbrjf9s1zc449xb-source/pkgs/development/tools/pnpm/generic.nix:164 because it is marked as insecure

       Known issues:
        - CVE-2026-48995
        - CVE-2026-50014
        - CVE-2026-50015
        - CVE-2026-50016
        - CVE-2026-50017
        - CVE-2026-50573
        - CVE-2026-55699

       You can install it anyway by allowing this package, using the
       following methods:

       a) To temporarily allow all insecure packages, you can use an environment
          variable for a single invocation of the nix tools:

            $ export NIXPKGS_ALLOW_INSECURE=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) for `nixos-rebuild` you can add ‘pnpm-9.15.9’ to
          `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
          like so:

            {
              nixpkgs.config.permittedInsecurePackages = [
                "pnpm-9.15.9"
              ];
            }

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
          ‘pnpm-9.15.9’ to `permittedInsecurePackages` in
          ~/.config/nixpkgs/config.nix, like so:

            {
              permittedInsecurePackages = [
                "pnpm-9.15.9"
              ];
            }