diff --git a/scripts/projects.py b/scripts/projects.py
index 5b1c6f24..db6329c8 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -141,7 +141,7 @@ class Projects(object):
 
     def os_cascade(self):
         if self.glob_os_cascade is not None:
-            return self.glob_os_cascade
+            return self.glob_os_cascade.copy()
         r = [ 'os', platform.system().lower() ]
         os = self.opt_os if self.opt_os is not None else self.res_cache.run(self.get_os, [])
         name = re.sub('-.*', '', os)
@@ -389,7 +389,10 @@ class Projects(object):
                         cleaned_dep = ' '.join(dep)
                         if not cleaned_dep in r:
                             r.append(cleaned_dep)
-        print(args.delimiter.join(r))
+        return args.delimiter.join(r)
+
+    def print_pkg_relations(self, rel_type, args_):
+        print(self.pkg_relations(rel_type, args_))
 
     def get_libname(self, names):
         vals = self.get_modules_from_project_txt(names, ['build'], 'libname',
@@ -708,7 +711,7 @@ class Projects(object):
             r = r + ':' + self.proj_dir(m) + '/bin'
         print(r[1:])
 
-    # TODO: seems at least partly redundant to cmd_pkg_requires / pkg_relations
+    # TODO: seems at least partly redundant to cmd_pkg_requires / print_pkg_relations
     def cmd_prereq(self, args_):
         parser = argparse.ArgumentParser(description='path')
         parser.add_argument('flavour', help='Flavour')
@@ -718,7 +721,7 @@ class Projects(object):
             args.flavour, scope = 2, add_self=False, names_only=True)
         print(' '.join(deps))
 
-    # TODO: seems at least partly redundant to cmd_pkg_requires / pkg_relations
+    # TODO: seems at least partly redundant to cmd_pkg_requires / print_pkg_relations
     def cmd_required_os_pkg(self, args_):
         parser = argparse.ArgumentParser(description='required-os-pkg')
         parser.add_argument('module', nargs='*', help='Modules')
@@ -750,13 +753,13 @@ class Projects(object):
         print(r[1:])
 
     def cmd_pkg_requires(self, args_):
-        return self.pkg_relations("requires", args_)
+        return self.print_pkg_relations("requires", args_)
 
     def cmd_pkg_conflicts(self, args_):
-        return self.pkg_relations("conflicts", args_)
+        return self.print_pkg_relations("conflicts", args_)
 
     def cmd_pkg_provides(self, args_):
-        return self.pkg_relations("provides", args_)
+        return self.print_pkg_relations("provides", args_)
 
     def cmd_proj_dir(self, args_):
         parser = argparse.ArgumentParser(description='proj-dir')