diff --git a/pkgs/tools/admin/chkcrontab/default.nix b/pkgs/tools/admin/chkcrontab/default.nix
index bbf8d7eaeb1c..d91894f00063 100644
--- a/pkgs/tools/admin/chkcrontab/default.nix
+++ b/pkgs/tools/admin/chkcrontab/default.nix
@@ -1,6 +1,6 @@
-{ python, lib }:
+{ python3, lib }:
 
-with python.pkgs;
+with python3.pkgs;
 
 buildPythonApplication rec {
   pname = "chkcrontab";