diff --git a/{{ cookiecutter.package_name }}/.rtd-environment.yml b/{{ cookiecutter.package_name }}/.rtd-environment.yml
index 16c606e..5528179 100644
--- a/{{ cookiecutter.package_name }}/.rtd-environment.yml	
+++ b/{{ cookiecutter.package_name }}/.rtd-environment.yml	
@@ -2,6 +2,6 @@ name: {{ cookiecutter.package_name }}
 channels:
   - conda-forge
 dependencies:
-  - python=3.10
+  - python=3.12
   - pip
   - graphviz!=2.42.*,!=2.43.*
diff --git a/{{ cookiecutter.package_name }}/pyproject.toml b/{{ cookiecutter.package_name }}/pyproject.toml
index e4d8c2f..4635dd1 100644
--- a/{{ cookiecutter.package_name }}/pyproject.toml	
+++ b/{{ cookiecutter.package_name }}/pyproject.toml	
@@ -54,10 +54,14 @@ zip-safe = false
 include-package-data = true
 
 [tool.setuptools.packages.find]
+include = ["{{ cookiecutter.module_name }}*"]
 {%- if cookiecutter.enable_dynamic_dev_versions == 'y' %}
 exclude = ["{{ cookiecutter.module_name }}._dev*"]
 {%- endif %}
-
+{% if cookiecutter.use_compiled_extensions == 'y' %}
+[tool.setuptools.exclude-package-data]
+"*" = ["*.c", "*.h"]
+{% endif %}
 [tool.setuptools_scm]
 {% if cookiecutter.enable_dynamic_dev_versions == 'y' -%}
 write_to = "{{ cookiecutter.module_name }}/_version.py"