diff --git a/pkgs/development/python-modules/gpy/default.nix b/pkgs/development/python-modules/gpy/default.nix
index e4fbda924760..33da65d155cc 100644
--- a/pkgs/development/python-modules/gpy/default.nix
+++ b/pkgs/development/python-modules/gpy/default.nix
@@ -14,7 +14,7 @@
 }:
 
 buildPythonPackage rec {
-  pname = "GPy";
+  pname = "gpy";
   version = "1.13.0";
   pyproject = true;