diff --git a/scripts/projects.py b/scripts/projects.py
index 2baf3dc5..4c4d9c4f 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -289,6 +289,9 @@ def cmd_required_pkg(args_):
         r = r + ' ' + m
     print(r[1:])
 
+def cmd_os_cascade(args_):
+    print(' '.join(pkg_required_os_cascade()))
+
 def cmd_ldlibpath(args_):
     parser = argparse.ArgumentParser(description='ldlibpath')
     parser.add_argument('module', nargs='*', help='Modules')