diff --git a/tools/batools/build.py b/tools/batools/build.py
index c13c3c12..3482f607 100644
--- a/tools/batools/build.py
+++ b/tools/batools/build.py
@@ -680,10 +680,11 @@ def _docker_build(
     subprocess.run(build_cmd, check=True)
 
 
-# todo: add option to toggle between prefab and cmake
 def docker_build() -> None:
+    """Build docker image."""
     import shutil
 
+    # todo: add option to toggle between prefab and cmake
     shutil.copy('src/assets/docker/Dockerfile', '.')
     from batools import version