diff --git a/umu/umu_runtime.py b/umu/umu_runtime.py
index 5b2c30fb..96eddbb2 100644
--- a/umu/umu_runtime.py
+++ b/umu/umu_runtime.py
@@ -173,6 +173,10 @@ def _install_umu(
 
             if var.is_dir():
                 log.debug("Removing: %s", var)
+                # Remove the variable directory to avoid Steam Linux Runtime
+                # related errors when creating it. Supposedly, it only happens
+                # when going from umu-launcher 0.1-RC4 -> 1.1.1
+                # See https://github.com/Open-Wine-Components/umu-launcher/issues/213#issue-2576708738
                 thread_pool.submit(rmtree, str(var))
 
             for future in futures: