What did you expect to happen?

Topgrade upgrade nixpkgs installed in Arch Linux.

What actually happened?

Non-free nixpkgs are not being upgraded and the output error is:

Additional Details

• Which operating system or Linux distribution are you using? Arch Linux
• How did you install Topgrade? Via cargo.
• Which version are you running? Topgrade 10.3.3

error: Package ‘geekbench-6.0.1’ in /nix/store/jlhl9fc6x7a54y23yxkx6822ymqzsp7a-source/pkgs/tools/misc/geekbench/6.nix:44 has an unfree license (‘unfree’), refusing to evaluate.

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

$ export NIXPKGS_ALLOW_UNFREE=1

Note: For `nix shell`, `nix build`, `nix develop` or any other Nix 2.4+
(Flake) command, `--impure` must be passed in order to read this
environment variable.

b) For `nixos-rebuild` you can set
{ nixpkgs.config.allowUnfree = true; }
in configuration.nix to override this.

Alternatively you can configure a predicate to allow specific packages:
{ nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
"geekbench"
];
}

c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
{ allowUnfree = true; }
to ~/.config/nixpkgs/config.nix.

I've tried the following to address the issue without luck:

1. export NIXPKGS_ALLOW_UNFREE=1 && topgrade
2. Create a ~/.config/nixpkgs/config.nix file with { allowUnfree = true; } as its content.
3. In topgrade.toml config file, tested all the following nix_arguments one by one:
   a) nix_arguments = "impure"
   b) nix_arguments = "--allowUnfree"
   c) nix_arguments = "--allow-unfree"

What can I do? Thanks for your support.