diff --git a/pkgs/tools/security/diceware/default.nix b/pkgs/tools/security/diceware/default.nix
index 07682eb22c5..dcd7e853564 100644
--- a/pkgs/tools/security/diceware/default.nix
+++ b/pkgs/tools/security/diceware/default.nix
@@ -1,8 +1,8 @@
 { lib
-, pythonPackages
+, python3Packages
 }:
 
-with pythonPackages;
+with python3Packages;
 
 buildPythonApplication rec {
   pname = "diceware";