diff --git a/pyproject.toml b/pyproject.toml
index 66920e8..fe2e736 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,9 +70,6 @@ docs = [
 [project.scripts]
 pip-run = "pip_run:run"
 
-[tool.setuptools]
-py-modules = ["pip-run"]
-
 [tool.setuptools.packages.find]
 exclude = [
 	# duplicate exclusions for pypa/setuptools#2688
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..64e4337
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,2 @@
+[options]
+py-modules = pip-run