diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..fed528d4
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index fd52e32f..0d189bb8 100755
--- a/setup.py
+++ b/setup.py
@@ -2,6 +2,10 @@
 # -*- coding: utf-8 -*-
 
 import os
+import sys
+
+sys.path.insert(0, os.path.dirname(__file__))
+
 import openupgradelib
 
 from setuptools import setup