nixos-system-config/users/hu/packages/git.nix

{ ... }:

{
  programs.git = {
    enable = true;
    userName = "caem";
    userEmail = "me@caem.dev";
    signing = {
      key = "E50FC66B5062070DC462661C69A830D03203405F";
      signByDefault = true;
    };
  };
}