diff --git a/docs/contributing.rst b/docs/contributing.rst
new file mode 100644
index 0000000..2d90f63
--- /dev/null
+++ b/docs/contributing.rst
@@ -0,0 +1,7 @@
+Contributing
+============
+
+Install the requirements::
+
+    $ pip install -r requirements.txt
+    $ pip install -r requirements-dev.txt
diff --git a/docs/index.rst b/docs/index.rst
index 8f46bc4..a2a31cf 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,6 +24,7 @@ Contents
    file-format
    hooks
    api-reference
+   contributing
    changelog
 
 
diff --git a/fabfile.py b/fabfile.py
index 20b828c..3ced95a 100644
--- a/fabfile.py
+++ b/fabfile.py
@@ -22,9 +22,9 @@ def coverage():
 
 @task
 def clean():
-    """Remove all .pyc files"""
+    """Remove all .pyc files."""
     # Ignore hidden files and folder
-    local("find . \( ! -regex '.*/\..*/..*' \) -type f -name '*.pyc' -exec rm '{}' +")
+    local("find . -name '*.py[co]' -exec rm -f '{}' ';'")
 
 
 @task