Update src/user-guide/installing-workflows.rst

Author: wxtim

src/user-guide/installing-workflows.rst

@@ -400,6 +400,8 @@ The run directory now looks as follows:
 
 .. note::
 
+   If your workflow needs to create or install scripts or executables at runtime
+   and you don't want Cylc to delete them on re-installation, you can use
    ``bin`` and ``lib/python`` directories in the :ref:` workflow share directory <WorkflowShareDirectories>`.