--- cabal-rpm-0.12.6/src/Options.hs~	2018-10-20 23:15:10.000000000 +0900
+++ cabal-rpm-0.12.6/src/Options.hs	2018-10-20 23:18:38.065660148 +0900
@@ -84,7 +84,7 @@
     }
 
 defaultStream :: String
-defaultStream = "lts"
+defaultStream = "lts-12"
 
 quiet :: RpmFlags
 quiet = emptyRpmFlags {rpmVerbosity = silent}