--- sys/unix/Makefile.utl.orig	2023-05-16 21:33:58 UTC
+++ sys/unix/Makefile.utl
@@ -103,18 +103,25 @@ NHSROOT=..
 # flags for debugging:
 # CFLAGS = -g -I../include
 
-#CFLAGS = -O -I../include
-#LFLAGS =
+CFLAGS += -I../include -I${LUA_INCDIR}
+ifeq ("$(GRAPHICS)","X11_GRAPHICS")
+CFLAGS += -DX11_GRAPHICS
+endif
+ifeq ("$(GRAPHICS)","QT_GRAPHICS")
+CFLAGS += -DQT_GRAPHICS
+endif
+ifeq ("$(GRAPHICS)","GNOME_GRAPHICS")
+CFLAGS += -DGNOME_GRAPHICS
+endif
 
-# -lm required by lua
-LFLAGS += -lm
+LFLAGS = -L${LUA_LIBDIR}
 
 # we specify C preprocessor flags via CFLAGS; files built with default rules
 # might include $(CPPFLAGS) which could get a value from user's environment;
 # we avoid that by forcing it empty rather than by overriding default rules
 CPPFLAGS =
 
-LIBS =
+LIBS = -llua-${LUA_VER} -lm
 
 OBJDIR = ../src