diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 000000000..bf25a1028
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "pkgconfig", "Cython"]
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index 3f6ba7f9c..84b806b47 100644
--- a/setup.py
+++ b/setup.py
@@ -19,6 +19,7 @@
 except ImportError:
     cythonize = None
 
+sys.path += [os.path.dirname(__file__)]
 import setup_checksums
 import setup_compress
 import setup_crypto