diff --git a/pkgs/development/python-modules/orange-widget-base/default.nix b/pkgs/development/python-modules/orange-widget-base/default.nix
index f749c03fa2e0..de80a074f929 100644
--- a/pkgs/development/python-modules/orange-widget-base/default.nix
+++ b/pkgs/development/python-modules/orange-widget-base/default.nix
@@ -22,8 +22,6 @@ buildPythonPackage rec {
   version = "4.25.0";
   pyproject = true;
 
-  build-system = [ setuptools ];
-
   src = fetchFromGitHub {
     owner = "biolab";
     repo = "orange-widget-base";
@@ -31,6 +29,8 @@ buildPythonPackage rec {
     hash = "sha256-tWo8vwC8xLA2ZKeab2GqpXGdlHhaqOT9wu1efqSHZSg=";
   };
 
+  build-system = [ setuptools ];
+
   dependencies = [
     matplotlib
     orange-canvas-core