--- src/game/Makefile.orig	2021-01-28 17:44:39 UTC
+++ src/game/Makefile
@@ -32,18 +32,18 @@ SDLCONF_L := $(shell ${SDL_CONF} --libs)
 #---------------------
 # the compiler options
 
-CC      := gcc
-INC     := -I. -I.. -I../enet/include ${SDLCONF_I} -I./extensions -I./file_formats -I./platform
-LDFLAGS := ${SDLCONF_L} -L../enet/lib -lSDL_ttf -lSDL_mixer -lGL -lGLU -lSDL_image -lphysfs -lenet
+CC      ?= gcc
+INC     := -I. -I.. -isystem${LOCALBASE}/include ${SDLCONF_I} -I./extensions -I./file_formats -I./platform
+LDFLAGS := ${SDLCONF_L} -L${LOCALBASE}/lib -lSDL_ttf -lSDL_mixer -lGL -lGLU -lSDL_image -lphysfs -lenet -lm
 
 # use different options if the environmental variable PREFIX is defined
 ifdef ($(PREFIX),"")
 	OPT := -Os -Wall
 else
-	OPT := -Os -Wall -DPREFIX=\"${PREFIX}\" -D_NIX_PREFIX
+	OPT := -Wall -DPREFIX=\"${PREFIX}\" -D_NIX_PREFIX
 endif
 
-CFLAGS  := ${OPT} ${INC}
+CFLAGS  += ${OPT} ${INC}
 
 #------------------------------------
 # definitions of the target projects