diff --git a/pkgs/tools/security/mkpasswd/default.nix b/pkgs/tools/security/mkpasswd/default.nix
index 38c26a93b4e3..2ee71b8227eb 100644
--- a/pkgs/tools/security/mkpasswd/default.nix
+++ b/pkgs/tools/security/mkpasswd/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation {
   pname = "mkpasswd";
-  inherit (whois) version src;
+  inherit (whois) version src patches;
 
   nativeBuildInputs = [ perl pkg-config ];
   buildInputs = [ libxcrypt ];