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[root@pro:~]# nixos-rebuild switch --upgrade
unpacking 1 channels...
building Nix...
building the system configuration...
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 `warnings':

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

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

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

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

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

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

       error: Package ‘redmine-5.1.5’ in /nix/store/29ar3c1fc655xdnjzsg2mqhj98yzrv6k-nixos-24.11/nixos/pkgs/by-name/re/redmine/package.nix:15 is marked as insecure, refusing to evaluate.

       Known issues:
        - CVE-2024-54133
        - GHSA-r95h-9x8f-r3f7

       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 ‘redmine-5.1.5’ to
          `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
          like so:

            {
              nixpkgs.config.permittedInsecurePackages = [
                "redmine-5.1.5" 
              ];
            }

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
          ‘redmine-5.1.5’ to `permittedInsecurePackages` in
          ~/.config/nixpkgs/config.nix, like so:

            {
              permittedInsecurePackages = [
                "redmine-5.1.5" 
              ];
            }