diff --git a/demos/3rdparty/doom/doom.mk b/demos/3rdparty/doom/doom.mk
deleted file mode 100644
index 6581f8c1..00000000
--- a/demos/3rdparty/doom/doom.mk
+++ /dev/null
@@ -1,64 +0,0 @@
-MYFILES = $(GFXLIB)/demos/3rdparty/doom
-MYCSRC = \
-		$(MYFILES)/d_main.c			\
-		$(MYFILES)/i_main.c			\
-		$(MYFILES)/i_system.c		\
-		$(MYFILES)/i_sound.c		\
-		$(MYFILES)/i_video.c		\
-		$(MYFILES)/i_net.c			\
-		$(MYFILES)/doomdef.c		\
-		$(MYFILES)/doomstat.c		\
-		$(MYFILES)/dstrings.c		\
-		$(MYFILES)/tables.c			\
-		$(MYFILES)/f_finale.c		\
-		$(MYFILES)/f_wipe.c 		\
-		$(MYFILES)/d_net.c			\
-		$(MYFILES)/d_items.c		\
-		$(MYFILES)/g_game.c			\
-		$(MYFILES)/m_menu.c			\
-		$(MYFILES)/m_misc.c			\
-		$(MYFILES)/m_argv.c  		\
-		$(MYFILES)/m_bbox.c			\
-		$(MYFILES)/m_fixed.c		\
-		$(MYFILES)/m_swap.c			\
-		$(MYFILES)/m_cheat.c		\
-		$(MYFILES)/m_random.c		\
-		$(MYFILES)/am_map.c			\
-		$(MYFILES)/p_ceilng.c		\
-		$(MYFILES)/p_doors.c		\
-		$(MYFILES)/p_enemy.c		\
-		$(MYFILES)/p_floor.c		\
-		$(MYFILES)/p_inter.c		\
-		$(MYFILES)/p_lights.c		\
-		$(MYFILES)/p_map.c			\
-		$(MYFILES)/p_maputl.c		\
-		$(MYFILES)/p_plats.c		\
-		$(MYFILES)/p_pspr.c			\
-		$(MYFILES)/p_setup.c		\
-		$(MYFILES)/p_sight.c		\
-		$(MYFILES)/p_spec.c			\
-		$(MYFILES)/p_switch.c		\
-		$(MYFILES)/p_mobj.c			\
-		$(MYFILES)/p_telept.c		\
-		$(MYFILES)/p_tick.c			\
-		$(MYFILES)/p_saveg.c		\
-		$(MYFILES)/p_user.c			\
-		$(MYFILES)/r_bsp.c			\
-		$(MYFILES)/r_data.c			\
-		$(MYFILES)/r_draw.c			\
-		$(MYFILES)/r_main.c			\
-		$(MYFILES)/r_plane.c		\
-		$(MYFILES)/r_segs.c			\
-		$(MYFILES)/r_sky.c			\
-		$(MYFILES)/r_things.c		\
-		$(MYFILES)/w_wad.c			\
-		$(MYFILES)/wi_stuff.c		\
-		$(MYFILES)/v_video.c		\
-		$(MYFILES)/st_lib.c			\
-		$(MYFILES)/st_stuff.c		\
-		$(MYFILES)/hu_stuff.c		\
-		$(MYFILES)/hu_lib.c			\
-		$(MYFILES)/s_sound.c		\
-		$(MYFILES)/z_zone.c			\
-		$(MYFILES)/info.c			\
-		$(MYFILES)/sounds.c