Simplest pyproject.toml containing [build-system] only

Author: ianthomas23

pyproject.toml

@@ -0,0 +1,7 @@
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = [
+    "certifi>=2020.06.20",
+    "numpy>=1.19",
+    "setuptools_scm>=7",
+]

setup.py

@@ -34,6 +34,8 @@
 import setuptools.command.build_py
 import setuptools.command.sdist
 
+sys.path.append(str(Path(__file__).resolve().parent))
+
 import setupext
 from setupext import print_raw, print_status
 
@@ -300,11 +302,6 @@ def make_release_tree(self, base_dir, files):
     package_data=package_data,
 
     python_requires='>={}'.format('.'.join(str(n) for n in py_min_version)),
-    setup_requires=[
-        "certifi>=2020.06.20",
-        "numpy>=1.19",
-        "setuptools_scm>=7",
-    ],
     install_requires=[
         "contourpy>=1.0.1",
         "cycler>=0.10",