anchor.diff:  in
   
   {
  +  imports = [
  +    (mkRemovedOptionModule [ "nix" "gc" "dates" ] "Use `nix.gc.interval` instead.")
  +    (mkRemovedOptionModule [ "nix" "gc" "randomizedDelaySec" ] "No `nix-darwin` equivilant to this NixOS option.")
  +    (mkRemovedOptionModule [ "nix" "gc" "persistent" ] "No `nix-darwin` equivilant to this NixOS option.")
  +  ];
   
     ###### interface
   
  
positive.code:       };
  
        options = mkOption {
          type = types.str;
          default = "";
          example = "--max-freed $((64 * 1024**3))";
          description = ''
            Options given to <filename>nix-collect-garbage</filename> when the
            garbage collector is run automatically.
  
negative.code:     nix.gc = {
  
        automatic = mkOption {
          default = false;
          type = types.bool;
          description = "Automatically run the garbage collector at a specific time.";
        };
  
        # Not in NixOS module
        user = mkOption {
          type = types.nullOr types.str;
          default = null;
  