How to fix this installation stuation

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1

I’m installing app and i got this message:

error:
… while calling the ‘head’ builtin
at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:1:35741:
… while evaluating the attribute ‘value’
at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:1:33591:
… while evaluating the option `system.build.toplevel’:

   … while evaluating definitions from `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/system/activation/top-level.nix':

   … while evaluating the option `system.systemBuilderArgs':

   … while evaluating definitions from `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/system/activation/activatable-system.nix':

   … while evaluating the option `system.activationScripts.etc.text':

   … while evaluating definitions from `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/system/etc/etc-activation.nix':

   … while evaluating definitions from `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/system/etc/etc.nix':

   … while evaluating the option `environment.etc.dbus-1.source':

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

   error: Package ‘qtwebkit-5.212.0-alpha4’ in /nix/var/nix/profiles/per-user/root/channels/nixos/pkgs/development/libraries/qt-5/qtModule.nix:1 is marked as insecure, refusing to evaluate.


   Known issues:
    - QtWebkit upstream is unmaintained and receives no security updates, see https://blogs.gnome.org/mcatanzaro/2022/11/04/stop-using-qtwebkit/

   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 ‘qtwebkit-5.212.0-alpha4’ to
      `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
      like so:

        {
          nixpkgs.config.permittedInsecurePackages = [
            "qtwebkit-5.212.0-alpha4"
          ];
        }

   c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
      ‘qtwebkit-5.212.0-alpha4’ to `permittedInsecurePackages` in
      ~/.config/nixpkgs/config.nix, like so:

        {
          permittedInsecurePackages = [
            "qtwebkit-5.212.0-alpha4"
          ];
        }

How can i fix it?

2

The bottom of the error tells you exactly how to fix this.
The real question of course would be which app is causing this error - you have some app depending on qtwebkit, and you should consider moving off of this app.

EDIT: and if you don’t know which app it is, use --show-trace to identify it.

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