diff --git a/pkgs/development/python-modules/cron-descriptor/default.nix b/pkgs/development/python-modules/cron-descriptor/default.nix
index 1bdf20d76d98..acd22f975f46 100644
--- a/pkgs/development/python-modules/cron-descriptor/default.nix
+++ b/pkgs/development/python-modules/cron-descriptor/default.nix
@@ -8,7 +8,7 @@
 }:
 
 buildPythonPackage rec {
-  pname = "cron_descriptor";
+  pname = "cron-descriptor";
   version = "1.4.3";
   pyproject = true;