diff --git a/python-rpm-generators.spec b/python-rpm-generators.spec
index 5da4f46..60811e5 100644
--- a/python-rpm-generators.spec
+++ b/python-rpm-generators.spec
@@ -1,7 +1,7 @@
 Name:           python-rpm-generators
 Summary:        Dependency generators for Python RPMs
 Version:        11
-Release:        11%{?dist}
+Release:        12%{?dist}
 
 # Originally all those files were part of RPM, so license is kept here
 License:        GPLv2+
@@ -47,6 +47,9 @@ install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} *.py
 %{_rpmconfigdir}/pythonbundles.py
 
 %changelog
+* Mon Oct 19 2020 Tomas Orsava <torsava@redhat.com> - 11-12
+- Run scripts in an isolated Python environment (#1889080)
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 11-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/pythonbundles.py b/pythonbundles.py
old mode 100644
new mode 100755
index 5093dff..96e817e
--- a/pythonbundles.py
+++ b/pythonbundles.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3 -B
+#!/usr/bin/python3 -sB
 #                  (imports pythondistdeps from /usr/lib/rpm, hence -B)
 #
 # This program is free software.
diff --git a/pythondistdeps.py b/pythondistdeps.py
index 1ca576b..70e08b8 100755
--- a/pythondistdeps.py
+++ b/pythondistdeps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/python3 -s
 # -*- coding: utf-8 -*-
 #
 # Copyright 2010 Per Øyvind Karlsen <proyvind@moondrake.org>