diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 124ca5c7..6a970111 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -57,7 +57,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Download HTML documentation from job 'test'
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4.1.7
       with:
         name: html-doc
         path: example/_build/html
diff --git a/MANIFEST.in b/MANIFEST.in
index db37a39d..344d5316 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,27 +4,17 @@ include README.rst
 # added by check_manifest.py
 include LICENSE
 include NOTICE
-include tox.ini
-recursive-include mlx/coverity *.py
-exclude mlx/coverity/__coverity_version__.py
-recursive-include example *.bat
-recursive-include example *.py
-recursive-include example *.rst
-recursive-include example Makefile
-recursive-include tests *.py
-recursive-include tests *.rst
-recursive-include tests *.txt
-recursive-include tests *.json
-
-exclude example/.env.example
+exclude tox.ini
 exclude .pylintrc
-recursive-exclude example _build *
-
-# added by check_manifest.py
-recursive-include example *.css
+exclude .gitignore
+exclude .codeclimate.yml
+exclude codecov.yml
+exclude warnings_config.yml
 
-# added by check_manifest.py
-recursive-include tests *.xml
-
-# added by check-manifest
-include *.json
+recursive-include mlx/coverity *.py
+exclude mlx/coverity/__coverity_version__.py
+recursive-exclude .github *
+recursive-exclude build *
+recursive-exclude example *
+recursive-exclude tests *
+global-exclude *.py[co]
diff --git a/README.rst b/README.rst
index 0f8a6e5b..daa34a56 100644
--- a/README.rst
+++ b/README.rst
@@ -92,8 +92,8 @@ Example of custom credentials for the plugin:
 
     coverity_credentials = {
         'hostname': 'scan.coverity.com',
-        'username': 'reporter',
-        'password': 'coverity',
+        'username': 'myusername',
+        'password': 'mypassword',
         'stream': 'some_coverity_stream',
         'snapshot': '1',
     }
@@ -290,7 +290,10 @@ nice gesture and considered as contribution, even if you do not have development
 Development setup
 -----------------
 
-To run tests and checks we use tox.
+To contribute to the code or documentation, you may want to run tests and build the documentation. Firstly, clone
+the repository.
+
+To run tests and checks we use tox_.
 
 .. code-block:: bash
 
@@ -300,18 +303,23 @@ To run tests and checks we use tox.
     # to run tests
     tox
 
-To build example locally you will need to install some dependencies and set your environment.
+To build the example documentation locally, you will need to install the package and set your environment, see help_.
 
 .. code-block:: bash
 
     # install current package locally and its dependencies
-    pip3 install -e .
+    pip3 install --editable .
 
-    # copy example .env to your .env
-    cp example/.env.example .env
+    # define environment variables, needed by example/conf.py
+    # or store them in a .env file for a more permanent solution
+    export COVERITY_USERNAME='yourusername'
+    export COVERITY_PASSWORD='yourpassword'
+    export COVERITY_STREAM='yourstream'
+    export COVERITY_SNAPSHOT=''
 
-    # add env variables, adjust the values in .env
-    # build
-    make -C example/ html
+    # build documentation with Sphinx in a Tox environment
+    tox -e html
 
 .. _`Traceability extension`: https://github.com/melexis/sphinx-traceability-extension/
+.. _tox: https://tox.wiki/
+.. _help: https://pypi.org/project/python-decouple/#where-is-the-settings-data-stored
diff --git a/example/.env.example b/example/.env.example
deleted file mode 100644
index c8cea9fe..00000000
--- a/example/.env.example
+++ /dev/null
@@ -1,5 +0,0 @@
-COVERITY_USERNAME = 'yourusername'
-COVERITY_PASSWORD = 'yourpassword'
-COVERITY_STREAM = 'yourstream'
-COVERITY_SNAPSHOT = ''
-
diff --git a/setup.py b/setup.py
index 17ba81dc..4aa459e6 100644
--- a/setup.py
+++ b/setup.py
@@ -43,9 +43,9 @@
         'Topic :: Utilities',
     ],
     platforms="any",
-    packages=find_namespace_packages(where="."),
+    packages=find_namespace_packages(where=".", exclude=("example.*", "example", "tests.*", "tests", "build*")),
     package_dir={"": "."},
-    include_package_data=True,
+    include_package_data=False,
     install_requires=requires,
     python_requires='>=3.8',
     namespace_packages=['mlx'],