anchor.diff:          default = false;
           type = types.bool;
           description = ''
  -          Automatically generate a private key with `wg genkey`,
  -          at the privateKeyFile location.
  +          Automatically generate a private key with
  +          <command>wg genkey</command>, at the privateKeyFile location.
           '';
         };
   
  
positive.code:         type = with types; nullOr str;
          default = null;
          description = ''
            Private key file as generated by wg genkey.
          '';
        };
  
  
negative.code:         type = with types; nullOr str;
          default = null;
          description = ''
            Base64 private key generated by <command>wg genkey</command>.
  
            Warning: Consider using privateKeyFile instead if you do not
            want to store the key in the world-readable Nix store.
  