diff --git a/scripts/projects.py b/scripts/projects.py
index 121eb943..75028d4d 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -99,10 +99,23 @@ def htdocs_dir(name):
     return None
 
 def os_cascade():
+    r = [ 'os', platform.system().lower() ]
     os = cache.run(get_os, [])
     name = re.sub('-.*', '', os)
+    series = os
+    while True:
+	n = re.sub('\.[0-9]+$', '', series)
+	if n == series:
+	    break
+	r.append(n)
+        series = n
+    if not name in r:
+    	r.append(name)
+    if not os in r:
+	r.append(os)
     # e.g. os, linux, suse, suse-tumbleweed
-    return [ 'os', platform.system().lower(), name, os ]
+    #return [ 'os', platform.system().lower(), name, os ]
+    return r
 
 def strip_module_from_spec(mod):
     return re.sub(r'-devel$|-run$', '', re.split('([=><]+)', mod)[0].strip())
@@ -625,7 +638,7 @@ debug("----------------------------------------- running ", ' '.join(sys.argv))
 projs_root = args.prefix
 if args.topdir:
     topdir = args.topdir
-    top_name = cache.run(read_value, [topdir + '/make/project.conf', 'build', 'name'])
+    top_name = res_cache.run(read_value, [topdir + '/make/project.conf', 'build', 'name'])
     if not top_name:
         top_name = re.sub('-[0-9.-]*$', '', basename(realpath(topdir)))