--- ../src-Makefile.orig	2019-04-04 20:42:03.154183838 +0200
+++ ./src/Makefile	2019-04-04 20:52:51.247497612 +0200
@@ -2,7 +2,7 @@
 
 DESTDIR = ..
 
-CC = gcc
+CC ?= gcc
 INSTALL = install
 CFLAGS ?= -s -Wall -O2
 LDFLAGS += -lncurses
@@ -10,10 +10,10 @@
 all: phear install clean
 
 %.o: %.c
-	$(CC) $(CFLAGS) -c $^ -o $@
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $^ -o $@
 
 phear: $(OBJS)
-	$(CC) $(CFLAGS) -o $@ $^ ${LDFLAGS}
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
 install: install-game