You’ll have to modify this file in order to do what you want, then import it into your config, unless somebody already did this for you as a flake or something. I’d give a more thorough explanation but I’m at work atm. Hopefully you can understand from the file what you need to do or someone else can explain.
https://github.com/NixOS/nixpkgs/blob/nixos-23.05/pkgs/applications/file-managers/ranger/default.nix#L53
You’ll have to modify this file in order to do what you want, then import it into your config, unless somebody already did this for you as a flake or something. I’d give a more thorough explanation but I’m at work atm. Hopefully you can understand from the file what you need to do or someone else can explain.