diff --git a/pyproject.toml b/pyproject.toml
index 44dcfbf5a4951620c3e62a0d20b9f0682d058744..66d34842fbff613b0a13ca7033bcd81db70497c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,10 +79,7 @@ build-backend = "setuptools.build_meta"
 [tool.setuptools.package-data]
 pystencils = [
     "include/*.h",
-    "backends/cuda_known_functions.txt",
-    "backends/opencl1.1_known_functions.txt",
-    "boundaries/createindexlistcython.c",
-    "boundaries/createindexlistcython.pyx",
+    "boundaries/createindexlistcython.pyx"
 ]
 
 [tool.setuptools.packages.find]
diff --git a/setup.py b/setup.py
index 188044a466494868e6712731f3e17afe854a8f15..13202a84fe9a1f31dde6dab5f6a515924573856f 100644
--- a/setup.py
+++ b/setup.py
@@ -10,9 +10,11 @@ if int(setuptools_version.split('.')[0]) < 61:
 
 import versioneer
 
+
 def get_cmdclass():
     return versioneer.get_cmdclass()
 
+
 setup(
     version=versioneer.get_version(),
     cmdclass=get_cmdclass(),