diff --git a/docs/src/apps.md b/docs/src/apps.md
index b175761..922d520 100644
--- a/docs/src/apps.md
+++ b/docs/src/apps.md
@@ -182,6 +182,36 @@ example, `$APPDIR` points to the AppImage mount point at runtime.
     `{{ python-executable }} -I` starts a fully isolated Python instance.
 {% endraw %}
 
+### Bundling data files
+
+`python-appimage` is also capable of bundling in auxilliary data files directly
+into the resulting AppImage. `-x/--extra-data` switch exists for that task.
+Consider following example.
+
+```bash
+echo -n "foo" > foo
+mkdir bar
+echo -n "baz" > bar/baz
+python-appimage [your regular parameters] -x foo bar/*
+```
+
+User data included in such a way becomes accessible to the Python code
+contained within the AppImage in a form of regular files under the directory
+pointed to by `APPDIR` environment variable. Example of Python 3 script
+that reads these exemplary files is presented below.
+
+```python
+import os, pathlib
+for fileName in ("foo", "baz"):
+  print((pathlib.Path(os.getenv("APPDIR")) / fileName).read_text())
+```
+
+Above code, when executed, would print following output.
+
+```bash
+foo
+baz
+```
 
 ## Advanced packaging
 
diff --git a/python_appimage/utils/fs.py b/python_appimage/utils/fs.py
index a42e9b8..5e6ec85 100644
--- a/python_appimage/utils/fs.py
+++ b/python_appimage/utils/fs.py
@@ -1,8 +1,30 @@
-from distutils.dir_util import mkpath as _mkpath, remove_tree as _remove_tree
-from distutils.file_util import copy_file as _copy_file
 import errno
 import os
 
+try:
+    from distutils.dir_util import mkpath as _mkpath
+    from distutils.dir_util import remove_tree as _remove_tree
+    from distutils.file_util import copy_file as _copy_file
+
+except ImportError:
+    import shutil
+
+    def _mkpath(path):
+        os.makedirs(path, exist_ok=True)
+
+    def _remove_tree(path):
+        shutil.rmtree(path)
+
+    def _copy_file(source, destination, update=0):
+        if os.path.exists(source) and (
+            not update
+            or (
+                (not os.path.exists(destination))
+                or (os.path.getmtime(source) > os.path.getmtime(destination))
+            )
+        ):
+            shutil.copyfile(source, destination)
+
 from .log import debug
 
 
diff --git a/python_appimage/utils/tmp.py b/python_appimage/utils/tmp.py
index 842b3c8..3a65cc5 100644
--- a/python_appimage/utils/tmp.py
+++ b/python_appimage/utils/tmp.py
@@ -20,5 +20,6 @@ def TemporaryDirectory():
     try:
         yield tmpdir
     finally:
+        debug('REMOVE', tmpdir)
         os.chdir(pwd)
         remove_tree(tmpdir)