GHCs built by Hadrian (and Make?) display RTS ways twice in --info output
$ _build/stage1/bin/ghc --info | grep "RTS ways"
,("RTS ways","v thr p thr_p debug_p thr_debug_p l thr_l debug thr_debug dyn thr_dyn debug_dyn l_dyn thr_debug_dyn thr_l_dyn")
,("RTS ways","v thr p thr_p debug_p thr_debug_p l thr_l debug thr_debug dyn thr_dyn debug_dyn l_dyn thr_debug_dyn thr_l_dyn"
I haven't checked whether that's the case when we build GHC with the Make build system yet. This should be simple to fix.