diff --git a/make_rpm.py b/make_rpm.py
index 0ee45e8..b31508b 100755
--- a/make_rpm.py
+++ b/make_rpm.py
@@ -70,6 +70,7 @@ class build(object):
     if os.path.exists( os.path.join( specdir, specname ) ):
       return specname
     specname = 'lts.spec'
+    specname = 'lts' + str(os.getenv( "BULD_VERSION" )) + '.spec'
     debug( "specname: %s" % os.path.join( specdir, specname ) )
     if os.path.exists( os.path.join( specdir, specname ) ):
       return specname