diff --git a/python/dumux/__init__.py b/python/dumux/__init__.py
index bb4c6ae25606e22f49e4e73de4426d1721d0e5d3..3a80e76b6c2db2583417c7356926a1daf3da998e 100644
--- a/python/dumux/__init__.py
+++ b/python/dumux/__init__.py
@@ -9,5 +9,3 @@ DuMux is
 
 https://dumux.org/
 """
-
-__import__("pkg_resources").declare_namespace(__name__)
diff --git a/python/setup.py.in b/python/setup.py.in
index 970d78de29b51be6fba1af93e6b12acec5f4f350..5287131d00eaa339a8aa6ee982b350024f15315e 100644
--- a/python/setup.py.in
+++ b/python/setup.py.in
@@ -1,4 +1,4 @@
-from setuptools import setup, find_namespace_packages
+from setuptools import setup
 
 setup(
     name="${ProjectName}",
@@ -6,7 +6,7 @@ setup(
     version="${ProjectVersionString}",
     author="${ProjectAuthor}",
     author_email="${ProjectMaintainerEmail}",
-    packages=find_namespace_packages(include=["dumux.*"]),
+    packages=["dumux"],
     zip_safe=0,
     package_data={"": ["*.so"]},
     install_requires="${ProjectPythonRequires}".split(" "),