diff --git a/nixos/modules/services/misc/mwlib.nix b/nixos/modules/services/misc/mwlib.nix
index d02e1e021a70..a8edecff2a1e 100644
--- a/nixos/modules/services/misc/mwlib.nix
+++ b/nixos/modules/services/misc/mwlib.nix
@@ -226,7 +226,7 @@ in
         chmod -Rc u=rwX,go= '${cfg.nslave.cachedir}'
       '';
 
-      path = with pkgs; [ imagemagick ];
+      path = with pkgs; [ imagemagick pdftk ];
       environment = {
         PYTHONPATH = concatMapStringsSep ":"
           (m: "${pypkgs.${m}}/lib/${python.libPrefix}/site-packages")