Advertised RTS ways is incorrect in at least 9.6.* and 9.8.* releases
[matt@nixos:~/ghcs-nix]$ ghc-9.8.2 --info | grep "RTS ways"
,("RTS ways","debug thr thr_debug thr_p dyn debug_dyn thr_dyn thr_debug_dyn thr_debug_p debug_p")
[matt@nixos:~/ghcs-nix]$ ghc-9.10.1 --info | grep "RTS ways"
,("RTS ways","v thr thr_debug thr_debug_p thr_debug_dyn thr_p thr_dyn debug debug_p debug_dyn p dyn")
Notice that the p
flavour is not advertised on 9.8.2.
This was fixed in 6c043187
Not sure whether this is worth backporting or not.