List packages explicitly

pyproject.toml

@@ -65,6 +65,7 @@ requires = [
 
 [tool.setuptools]
 dynamic.version.attr = "cpymad.__version__"
-packages.find = {where = ["src"], include = ["cpymad*"]}
+packages = ["cpymad", "cpymad.COPYING"]
+package-dir = {"" = "src"}
 package-data = {"cpymad.COPYING" = ["*.rst"]}
 include-package-data = false

setup.py

@@ -19,7 +19,7 @@
 # at the commit that first added this paragraph (can be identified using `git
 # blame`) and the simplifications that were possible in the following commits.
 
-from setuptools import setup, find_packages, Extension
+from setuptools import setup, Extension
 from distutils.util import get_platform
 from distutils import sysconfig
 from argparse import ArgumentParser
@@ -145,7 +145,7 @@ def get_extension_args(madxdir, shared, static, **libs):
                       sources=["src/cpymad/libmadx.pyx"],
                       **get_extension_args(**options.__dict__)),
         ]),
-        packages=find_packages('src', include='cpymad*'),
+        packages=['cpymad', 'cpymad.COPYING'],
         package_dir={'': 'src'},
         zip_safe=False,             # zip is bad for redistributing shared libs
         include_package_data=True,  # include files matched by MANIFEST.in