Is the UI broke again? Coz i'm getting this error

G:\MESS>make TARGET=mess OSD=winui
makefile:655: src/osd/winui/winui.mak: No such file or directory
src/mess/mess.mak:1949: src/mess/osd/winui/winui.mak: No such file or directory
make: *** No rule to make target `src/mess/osd/winui/winui.mak'. Stop.

Clean source and updated tools from mamedev. Any ideas?