diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index d04c9c410792..026ddf281e48 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -44,6 +44,9 @@ buildPythonPackage rec {
   nativeBuildInputs = [
     sphinxHook
     sphinx-better-theme
+  ];
+
+  build-system = [
     setuptools
   ];