diff --git a/utils/pkgs/ykfde/default.nix b/utils/pkgs/ykfde/default.nix
index 21b67b9..ee41b26 100644
--- a/utils/pkgs/ykfde/default.nix
+++ b/utils/pkgs/ykfde/default.nix
@@ -1,6 +1,7 @@
 { pkgs,
   lib,
   stdenv,
+  callPackage,
   makeWrapper,
   openssl,
   yubikey-personalization,