diff --git a/mkDub.nix b/mkDub.nix
index 2600d30..197dcde 100644
--- a/mkDub.nix
+++ b/mkDub.nix
@@ -1,4 +1,5 @@
 { pkgs ? import <nixpkgs> {},
+  lib ? pkgs.lib,
   stdenv ? pkgs.stdenv,
   rdmd ? pkgs.rdmd,
   dmd ? pkgs.dmd,